LC marker construction useful as an electromagnetically interrogatable transponder means

• US 5,285,191 A
• Filed: 05/07/1992
• Issued: 02/08/1994
• Est. Priority Date: 10/30/1981
• Status: Expired due to Fees

• Current Assignee: Max E. Reeb
• Original Assignee: Max E. Reeb
• Inventors: Reeb, Max E.
• Primary Examiner(s): Swann, III, Glen R.
• Application Number:
  US07/883,249
• Time in Patent Office: 642 Days
• Field of Search: 340/572, 333/219, 428/901, 29/846, 29/DIG. 3, 29/DIG. 16, 29/DIG. 40
• US Class Current: 340/572.5
• CPC Class Codes: G08B 13/2417 having a radio frequency identification chip
• CPC Class Codes: G08B 13/242 Tag deactivation
• CPC Class Codes: G08B 13/2431 Tag circuit details
• CPC Class Codes: G08B 13/2434 Tag housing and attachment details
• CPC Class Codes: G08B 13/2437 Tag layered structure, processes for making layered tags
• CPC Class Codes: G08B 13/244 Tag manufacturing, e.g. continuous manufacturing processes
• CPC Class Codes: G08B 13/2442 Tag materials and material properties thereof, e.g. magnetic material details
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 2027/2861 Coil formed by folding a blank
• CPC Class Codes: H01L 27/01 comprising only passive thin-film or thick-film elements formed on a common insulating substrate passive two-terminal components without a potential-jump or surface barrier for integrated circuits, details thereof and multistep manufacturing processes therefor H01L28/00
• CPC Class Codes: H03H 5/02 without voltage- or current-dependent elements
• CPC Class Codes: H05K 1/0393 Flexible materials H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups
• CPC Class Codes: H05K 1/162 incorporating printed capacitors
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: H05K 2201/09672 Superposed layout, i.e. in different planes parallel traces in one plane H05K2201/09236
• CPC Class Codes: H05K 2201/09727 Varying width along a single conductor; Conductors or pads having different widths
• CPC Class Codes: H05K 2201/10098 Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas
• CPC Class Codes: Y10S 428/901 Printed circuit
• CPC Class Codes: Y10T 29/49155 Manufacturing circuit on or in base

Abstract

A planar LC marker construction useful as an electromagnetically interrogatable transponder is comprised of at least two conductive paths forming planar clockwise and counterclockwise turning spiral patterns (if viewed from the same side) aligned face-to-face, and turn by turn, in opposition to each other, and spaced by an insulative layer. The layer may have various components, at least one of which may be an adhesive layer to co-perform a capacitive function at radio frequency. At least in part that layer may configure as a sheet. The construction features a superior in-system detectivity owing to a very low RF electromagnetic field deflection, and can be produced cheaply for one-time use.

Claims

1. An LC marker construction useful as an electromagnetically interrogatable transponder means in electronic security systems, comprising:

An inductive element (103,

     104) formed of planar conductor paths (47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) and a capacitive element (105,

     106) formed of mutually superposed conductor paths (37, 39;

47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) and at least one dielectric layer (38;

40, 41, 42;

45, 46;

81;

88,

     93) and at least one adhesive layer (62) spaced therebetween, said capacitive element and said inductive element forming a resonant circuit,

said conductor paths (47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) being so arranged as to constitute a stripline construction (37, 38,

     39), wherein conductor paths (37, 39;

47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) forming the capacitive element (105,

     106) at least in part are identical with conductor paths (37, 39;

47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) forming the inductive element (103,

     104), and wherein

said at least one adhesive layer is a an integral working element of said stripline construction which, by virtue of its dielectric permittivity and thickness, codetermines the resonant response of the LC marker construction.

2. The LC marker construction as set forth in claim 1, wherein

a stable pairwise superposition of conductor paths forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor paths, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers;

path segment (53, 47;

54, 48;

87 of 89,

     109) forming part of an upper conductor path pattern (31;

34;

89;

     109);

adhesive layer (62);

dielectric layer (40;

41;

     93);

adhesive layer (62);

path segment (49, 51;

50, 52;

87 of 90,

     110) forming part of a lower conductor path pattern (32;

33;

90;

     110).

3. The LC marker construction as set forth in claim 1, wherein

conductor paths (47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) in mutually superposed planes have at least one of

different shapes;

different dimensions;

different path widths.

4. The LC marker construction as set forth in claim 1, wherein

conductor paths (47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110) form at least two individual planar conductor path patterns (31, 34;

89, 90;

109,

     110) having the shape of spiral paths (in 31 between 83 and 86, in 34 between 84 and 86;

89, 90;

109,

     110) each having a plurality of turns which turn in opposite direction with respect to each other, if viewed from the same side, in an aligned superposition turn by turn.

5. The LC marker construction as set forth in claim 4, wherein

at least two mutually superposed terminal segments (47, 48;

83, 84;

inner end of 89, inner end of 90;

112, 113;

114,

     115) of said spiral paths (31, 34;

89, 90;

109,

     110) are designed with greater areas per unit length than are designed the other conductor path segments of said spiral paths.

6. The LC marker construction as est forth in claim 4, wherein

said oppositely turning spiral paths (31, 34;

89 and 90, 109 and

     110) are open-ended towards their spiral center, i.e. without termination paths being provided which produce a predominantly capacitive effect.

7. The LC marker construction as set forth in claim 1, wherein

said at least one dielectric layer (38;

40, 41, 42;

     93) is configured as a substantially continuous sheet (40, 41, 42;

     93).

8. The LC marker construction as set forth in claim 7, wherein

said substantially continuous sheet (40, 41, 42;

93) has a recessed opening (119) in an area not occupied by said conductor paths (47 to 54, 83, 84, 86;

87 of 89 and 90;

87 of 109 and

     110).

9. The LC marker construction as set forth in claim 1, wherein

said at least one dielectric layer (40, 41, 42;

81;

     93) lies between at least a portion of said mutually superposed conductor paths (31, 32, 33, 34;

89, 90;

109,

     110) and also extends over regions not occupied by conductor paths.

10. The LC marker construction as set forth in claim 1, wherein

particular segments (109, 108) of mutually superposing conductor paths (89, 90) are provided with a conductive connection between each other, so that the entirety of all conductive paths forms a route substantially having an uniform turn direction to form, in a coil manner, multiple turns.

11. The LC marker construction as est forth in claim 10, wherein

the LC marker construction is provided in a substantially endless repetition so as to form a coextending multiplicity of individual LC marker constructions separated from one another by severing cuts (71;

101), and wherein

one face of said multiplicity of LC marker constructions is provided with a self-adhesive affixing layer (72) topped with a protective peel-off film or paper (73) to be removed for affixing the LC marker construction to an object.

12. The LC marker construction as set forth in claim 1, wherein

said stripline construction is adhered to at least one flexible, electrically insulative carrier sheet (65, 165).

13. The LC marker construction as set forth in claim 1, wherein

the construction is provided with a recess (119, 125) in its inner region which is not occupied by conductor paths (47 to 54, 83 to 86;

89, 90;

109,

     110).

14. The LC marker construction as set forth in claim 1, wherein

said stripline construction is embedded in a paper- or cardboard-like cover material (165) having a carrier function.

15. The LC marker construction as set forth in claim 1, wherein

at least one face of the LC marker construction (70;

100;

118;

     122) is provided with at least one of

printed information;

data.

16. The LC marker construction as set forth in claim 1, wherein

said LC marker construction (97) comprises a customer section (99) and a cashier section (98), both sections separably (102) joining each another, and wherein said resonant circuit (100) is provided at least in one of said sections (98, 99).

17. The use of the LC marker construction according to claim 16, wherein

said customer section and cashier section are normally torn off one from another at a cashier'"'"'s site.

18. The use of the LC marker construction as set forth in claim 1, wherein

the LC marker construction(70;

100;

118,

     122) is utilized as an essential part of an electronic identification system, being electromagnetically interrogated for its RF frequency response.

19. The use of the LC marker construction as set forth in claim 1, wherein

data are deposited on at least one face thereof, and wherein

said data relate to an article to which said LC marker construction is affixed.

20. The use of the LC marker construction according to claim 1, wherein

the LC marker construction can be punched in a suitable place for thus being rendered inoperative to avoid its further detection.

21. The LC marker construction as set forth in claim 1, wherein

a stable pairwise superposition of conductor paths forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor paths, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

path segment (53, 47;

54, 48;

87 of 89,

     109) forming part of an upper conductor path pattern (31;

34;

89;

     109);

dielectric layer (88);

adhesive layer (62);

path segment (49, 51;

50, 52;

87 of 90,

     110) forming part of a lower conductor path pattern (32;

33;

90;

     110).

22. The LC marker construction as set forth in claim 3, wherein

a stable pairwise superposition of conductor paths forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor paths, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

path segment (53, 47;

54, 48;

87 of 89,

     109) forming part of an upper conductor path pattern (31;

34;

89;

     109);

dielectric layer (88);

first adhesive layer (62);

second adhesive layer (62);

dielectric layer (88);

path segment (49, 51;

50, 52;

87 of 90,

     110) forming part of a lower conductor path pattern (32;

33;

90;

     110).

23. The LC marker construction as set forth in claim 22, wherein

said first and second adhesive layers (62) adhesively combine with one another to a fixing center layer.

24. The LC marker construction as set forth in claim 1, wherein

a stable pairwise superposition of conductor paths forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor paths, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

path segment (53, 47;

54, 48;

87 of 89,

     109) forming part of an upper conductor path pattern (31;

34;

89;

     109);

adhesive layer (62);

first dielectric layer (81);

second dielectric layer (93);

adhesive layer (62);

path segment (49, 51;

50, 52;

87 of 90,

     110) forming part of a lower conductor path pattern (32;

33;

90;

     110).

25. The LC marker construction as set forth in claim 1, wherein

a stable pairwise superposition of conductor paths forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor paths, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

path segment (53, 47;

54, 48;

87 of 89,

     109) forming part of an upper conductor path pattern (31;

34;

89;

     109);

first dielectric layer (88);

adhesive layer (62);

second dielectric layer (81;

     93)

adhesive layer (62);

third dielectric layer (88);

path segment (49, 51;

50, 52;

87 of 90,

     110) forming part of a lower conductor path pattern (32;

33;

90;

     110).

26. The LC marker construction as set forth in claim 1, wherein

said stripline construction is trapped between two flexible sheets of a cover material (65, 165) having a carrier function.

27. The LC marker construction as set forth in claim 26, wherein

said stripline construction is fixed between said two flexible sheets of a cover material (65, 165) at least by a layer of a sealing or fixing material (61) provided and effective particularly between outwardly disposed surfaces of conductor paths (87;

89, 90;

109,

     110) of said stripline construction and the respective one of said two flexible sheets.

28. The LC marker construction as set forth in claim 27, wherein

said sealing or fixing material (61) is not same as the material from which said at least one adhesive layer (62) is made.

29. The LC marker construction as set forth in claim 1, wherein

said LC marker construction has a square to rectangular shape and wherein

at least one layer is provided having the shape of a strip, which strip is arranged to cross conductor paths arranged substantially in parallel to one of both edge directions of the construction and extends, between respective two opposing edges, over the full length or width of the construction.

30. A planar LC marker construction useful as an electromagnetically interrogatable transponder means, said construction comprising:

a first conductive element consisting of various first conductor strip portions which form a first conductive spiral pattern (89, 109;

     87) having first multiple turns,

a second conductive element consisting of various second conductor strip portions which form a second conductive spiral pattern (90, 110;

     87) having second multiple turns, and wherein

said first and second conductive spiral patterns turn in opposite directions with respect to each other when both are viewed from the same side, and are substantially aligned to each other, so as to substantially cover each other, turn by turn, and so that at least the major part of all conductor strip portions, on combination with at least one insulative spacing layer, form non-shorted stripline portions, each of which has a distributed line inductance and a distributed line capacitance which contribute to a respective total inductance and capacitance of the LC marker construction, and wherein

said at least one insulative spacing layer comprises at least one dielectric layer (88;

     93) having first and second surfaces; and

wherein

at least within the projected spaces between opposing face portions of superposing conductor strip portions, at least one additional layer (62) is provided for fixing and keeping in a mutual alignment with each other said conductive spiral patterns and said at least one dielectric layer,

so that at least a part of said first and second conductor strip portions are spaced from each other by at least two different layers.

31. The LC marker construction according to claim 30, wherein

said first and second conductive spiral patterns (89, 109;

90, 110;

     87) are generally aligned face-to-face except in the small zones of turn-to-turn transitions.

32. The LC marker construction according to claim 30, wherein

said conductive spiral patterns (89, 109;

90, 110;

     87) have been cut out from a metal foil.

33. The LC marker construction according to claim 30, wherein

first and second mutually opposing conductor strip portions have substantially different strip widths.

34. The LC marker construction according to claim 30, wherein

said first and second mutually opposing conductor strip portions have different strip widths, except the outermost first and second conductor strips.

35. The LC marker construction according to claim 30, wherein

at least those first and second conductor strip portions which are not part of respective first and second outermost turns, have substantially constant strip widths throughout the total lengths of the first and second spiral pattern routes.

36. The LC marker construction according to claim 30, wherein

said first and second conductor strip portions have substantially constant individual strip widths, except the innermost first and second terminal strip portions which have greater widths and thus more area per unit length.

37. The LC marker construction according to claim 30, wherein

said first and second conductor strip portions have substantially constant strip widths throughout the total lengths of first and second spiral pattern routes, except at least one strip portion arranged in the outermost turn of each of said conductive spiral patterns.

38. The LC marker construction according to claim 30, wherein

said first and second conductor strip portions have substantially constant strip widths throughout the total lengths of first and second spiral pattern routes, except the two innermost strip portions and at least one strip portion arranged in the outermost turn of each of said conductive spiral patterns.

39. The LC marker construction according to claim 30, wherein

said first conductive spiral pattern (89, 109;

87) and said second conductive spiral pattern (90, 110;

     87) have substantially equal areas.

40. The LC marker construction according to claim 30, wherein

said at least one additional layer (62) is thinner than the other layers of the LC marker construction.

41. The LC marker construction according to claim 30, wherein

said first and second multiple turns route, from an innermost conductor strip portion (112, 113) to an outermost conductor strip portion (107, 108;

114,

     115) in a substantially rectangular manner.

42. The LC marker construction according to claim 30, wherein

said at least one dielectric layer is substantially formed of a first and a second dielectric layer (88) bonding to respective facing surfaces of said first and second conductive spiral patterns (89, 109;

90, 110;

     87), and wherein

said at least one additional layer is a central adhesive layer (62 twice) which adheres to both opposing surfaces of said first and second dielectric layers (88).

43. The LC marker construction according to claim 30, wherein

said first and second conductive spiral patterns (89, 90) are conductively connected with one another.

44. The LC marker construction according to claim 43, wherein

said conductive connection is not through said at least one dielectric layer (88;

93).

45. The LC marker construction according to claim 43, wherein

first and second conductor strip portions (107, 108) of respective outermost first and second turns of said conductive spiral patterns (89, 90) are provided with an electrical short circuit connection with each other, any capacitance between which connected conductor strip portions thus being short circuited so that it cannot substantially contribute to said total capacitance of the LC marker construction.

46. The LC marker construction according to claim 45, wherein

said electrical short circuit connection of said first and second conductor strip portions (107, 108) of respective outermost turns of said first and second conductive spiral patterns (89, 90) is a multiple connection formed of various individual connections provided substantially in succession one to another along a line in the direction in which said first and second conductor strip portions (107, 108) extend.

47. The LC marker construction according to claim 45, wherein

said electrical short circuit connection of said first and second conductor strip portions (107, 108) of respective outermost turns of said first and second conductive spiral patterns (89, 90) is inherently provided in that both patterns are formed by portions of an integral conductive pattern.

48. The LC marker construction according to claim 47, wherein

said electrical short circuit connection is a multiple connection in that a plurality of individual connections between said first and second conductor strip portions (107, 108) is rendered between repetitive perforation cuts along a line in the direction in which said first and second conductor strip portions (107, 108) extend.

49. The LC marker construction according to claim 30, wherein

said at least one dielectric layer configures as an insulative sheet (93), which sheet extends, between said first and second conductive spiral patterns, at least over all portions of these patterns, which definitely contribute, by virtue of an electrical isolation one from each other, to said total capacitance of the LC construction, and wherein

said at least one additional layer are first and second adhesive layers (62) provided at least on opposing surfaces of said first and second conductive spiral patterns, respectively, and wherein

said insulative sheet is trapped and fixed between said conductive spiral patterns by virtue of said two adhesive layers (62) effective between said pattern portions and said sheet.

50. The LC marker construction according to claim 49, wherein

said first and second adhesive layers (62) have substantially the same thicknesses.

51. The LC marker construction according to claim 49, wherein

first and second conductor strip portions (107, 108) of respective outermost first and second turns of said conductive spiral patterns (89, 90) are provided with an electrical short circuit connection with each other, any capacitance between which connected conductor strip portions thus being short circuited so that it cannot substantially contribute to said total capacitance of the LC marker construction.

52. The LC marker construction according to claim 51, wherein

said electrical short circuit connection of said first and second conductor strip portions (107, 108) of respective outermost turns of said first and second conductive spiral patterns (89, 90) is a multiple connection formed of various individual connections provided substantially in succession one to another along a line in the direction in which said first and second conductor strip portions (107, 108) extend.

53. The LC marker construction according to claim 52, wherein

said electrical short circuit connection is a multiple connection in that a plurality of individual connections between said first and second conductor strip portions (107, 108) is rendered between repetitive perforation cuts along a line (92) in the direction in which said first and second conductor strip portions (107, 108) extend.

54. The LC marker construction according to claim 51, wherein

said electrical short circuit connection of said first and second conductor strip portions (107, 108) of respective outermost turns of said first and second conductive spiral patterns (89, 90) is inherently provided in that both patterns are formed by portions of an integral conductive pattern.

55. The LC marker construction according to claim 51, wherein

mutually superposed first and second conductor strip portions which are electrically isolated from one another, and thus are not in an electrical short circuit connection with each other, are spaced by a first adhesive layer (62), a dielectric sheet (93), and a second adhesive layer (62), and wherein

mutually superposed first and second conductor strip portions (107, 108), which are in an electrical short circuit connection with each other, at least over a part of their facing surfaces, are spaced by adhesive material (62) only.

56. The LC marker construction according to claim 51, wherein

said electrical short circuit connection is not through said dielectric sheet (93).

57. The LC marker construction according to claim 51, wherein

said electrical short circuit connection is exterior (around the edge) of said dielectric sheet (93).

58. The LC marker construction according to claim 49, wherein

a certain area in the center region of said dielectric sheet (93) is cut out so as to leave an opening (125).

59. The LC marker construction according to claim 30, wherein

said first conductive element and said second conductive element, and at least one dielectric layer and at least one additional layer effective therebetween, are sealed or adhesively trapped between two insulative cover sheets (65) by aid of additional fixing means (61).

60. The LC marker construction according to claim 57, wherein

a certain area in the center region of the construction is cut out so as to leave an opening (125).

61. The LC marker construction according to claim 30, wherein

a stripe of insulative material (81) is arranged so as to extend over all turns of said spiral conductive patterns across the full LC marker construction width or length.

62. The use of the LC marker construction according to claim 30 in a security tag which is at least one of

paperface-like;

cardboard-like;

tear-resistant;

bend-resistively reinforced;

sealed.

63. The use of the LC marker construction according to claim 30 in at least one of

a tag for articles'"'"' theft detection;

a merchandise tag carrying price data and/or printed information;

a data carrier tag;

a self-adhesively fitted tag;

a data carrying dual-section tag (97), on at least one section (98) thereof the LC marker construction being provided;

an access control tag.

64. The use of the LC marker construction according to claim 30 in a tag for an electronic security system, wherein

said LC marker construction is used at least in one of one-time tags and recirculation tags.

65. A planar LC marker construction for forming an electromagnetically detectable identification device, said construction comprising:

a dielectric sheet (93), on either surfaces of which sheet being affixed, by means of thin adhesive layers (62), a planar conductive multi-turn spiral path (89, 90;

109,

     110) each turn of which forms a substantially closed loop and is in substantial registration face-to-face with an opposing turn of the spiral path on the opposite surface (except in the small zones of turn-to-turn transitions), said multi-turn spiral paths being oppositely wound with respect to each other when both are viewed from the same side of said sheet (93) to thereby form a series of closed loops having both inductive and distributed capacitive components which cause a resonating capability of the LC marker construction.

66. The LC marker construction according to claim 65, wherein

said oppositely wound planar conductive multi-turn spiral paths (89, 90;

109,

     110) have been cut out from a metal foil.

67. The LC marker construction according to claim 65, wherein

said oppositely wound planar conductive multi-turn spiral paths (89, 90;

109,

     110) have substantially different strip widths.

68. The LC marker construction according to claim 65, wherein

said oppositely wound planar conductive multi-turn spiral paths (89, 90;

109,

     110) have different strip widths, except their outermost terminal path portions.

69. The LC marker construction according to claim 65, wherein

at least those portions of said planar conductive multi-turn spiral paths (89, 90;

109,

     110), which are not part of their respective outermost turns, have substantially constant path widths throughout the lengths of said spiral path routes.

70. The LC marker construction according to claim 65, wherein

said planar conductive multi-turn spiral paths (89, 90;

109,

     110) have substantially constant individual path widths, except the innermost terminal path portions which have greater widths and thus more area per unit length.

71. The LC marker construction according to claim 65, wherein

said planar conductive multi-turn spiral paths (89, 90) are conductively connected with one another.

72. The LC marker construction according to claim 65, wherein

the outermost terminal path portions (107, 108) of said planar conductive multi-turn spiral paths (89, 90) at least in part are not affixed on said sheet (93) but directly adhere one to another by means of an adhesive material (62) spaced therebetween, and have at least one electrically conductive connection with one another, which connection is not through said sheet.

73. The use of the LC marker construction according to claim 65 in a security tag which is at least one of

paperface-like;

cardboard-like;

tear-resistant;

bend-resistively reinforced;

sealed.

74. The use of the LC marker construction according to claim 65 in at least one of

a tag for articles'"'"' theft detection;

a merchandise tag carrying price data and/or printed information;

a data carrier tag;

a self-adhesively fitted tag;

a data carrying dual-section tag (97), on at least one section (98) thereof the LC marker construction being provided;

an access control tag.

75. The use of the LC marker construction according to claim 65 in a tag for an electronic security system, wherein

said LC marker construction is used at least in one of one-time tags and recirculation tags.

76. The LC marker construction as set forth in claim 65, wherein

said LC marker construction has a square to rectangular shape and wherein

at least one layer is provided having the shape of a strip, which strip is arranged to substantially cross spiral path segments arranged substantially in parallel to one of both edge directions of the construction and extends, between respective two opposing edges, over the full length or width of the construction.

77. A planar LC marker construction useful as an electromagnetically interrogatable transponder means, said construction comprising:

a first conductive element consisting of various first conductor strip portions which form a first conductive spiral pattern (89, 109;

     87) having first multiple turns,

a second conductive element consisting of various second conductor strip portions which form a second conductive spiral pattern (90, 110;

     87) having second multiple turns, and wherein

said first and second conductive spiral patterns turn in opposite directions with respect to each other when both are viewed from the same side, and are substantially aligned to each other, so as to substantially cover each other face-to-face and turn by turn, except in small zones of turn-to-turn transitions, so that at least the major part of all conductor strip portions, in combination with at least one dielectric spacing layer (88;

     93) and at least one additional layer (62) present at least in projected spaces between mutually opposing first and second conductor strip portions, form non-shorted stripline portions each of which having a distributed line inductance and a distributed line capacitance which contribute to a respective total inductance and total capacitance and thus to a resonating capability of the LC marker construction, and wherein

said at least one additional layer (62) has at least one of adhering and sealing capabilities for fixing and keeping in a mutual alignment with each other said conductive spiral patterns and said at least one dielectric layer.

78. The LC marker construction according to claim 77, wherein

said conductive spiral patterns (89, 109;

90, 110;

     87) have been cut out from a metal foil.

79. The LC marker construction according to claim 77, wherein

first and second mutually opposing conductor strip portions have substantially different strip widths.

80. The LC marker construction according to claim 77, wherein

said first and second mutually opposing conductor strip portions have different strip widths, except the outermost first and second conductor strips.

81. The LC marker construction according to claim 77, wherein

at least those first and second conductor strip portions which are not part of respective first and second outermost turns, have substantially constant strip widths throughout the total lengths of first and second spiral pattern routes.

82. The LC marker construction according to claim 77, wherein

said first and second conductor strip portions have substantially constant individual strip widths, except the innermost first and second terminal strip portions which have greater widths and thus more area per unit length.

83. The LC marker construction according to claim 77, wherein

said first and second conductor strip portions have substantially constant strip widths throughout the total lengths of first and second spiral pattern routes, except the two innermost strip portions and at least one strip portion arranged in the outermost turn of each of said conductive spiral patterns.

84. The LC marker construction according to claim 77, wherein

said first and second conductive spiral patterns (89, 90) are conductively connected with one another.

85. The LC marker construction according to claim 84, wherein

said conductive connection is not through said at least one dielectric layer (88;

93).

86. The LC marker construction according to claim 77, wherein

first and second conductor strip portions (107, 108) of respective outermost first and second turns of said conductive spiral patterns (89, 90) are provided with an electrical short circuit connection with each other, any capacitance between which connected conductor strip portions thus being short circuited so that it cannot substantially contribute to said total capacitance of the LC marker construction.

87. The use of the LC marker construction according to claim 77 in a security tag which is at least one of

paperface-like;

cardboard-like;

tear-resistant;

bend-resistively reinforced;

sealed.

88. The use of the LC marker construction according to claim 77 in at least one of

a tag for articles'"'"' theft detection;

a merchandise tag carrying price data and/or printed information;

a data carrier tag;

a self-adhesively fitted tag;

a data carrying dual-section tag (97), on at least one section (98) thereof the LC marker construction being provided;

an access control tag.

89. The use of the LC marker construction according to claim 77 in a tag for an electronic security system, wherein

said LC marker construction is used at least in one of one-time tags and recirculation tags.

90. The LC marker construction as set forth in claim 77, wherein

a stable pairwise superposition of conductor strip portions forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor strip portions, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers;

conductor strip portion forming part of the first conductive spiral pattern (89, 109;

     87);

adhesive layer (62);

dielectric layer (93);

adhesive layer (62);

conductor strip portion forming part of the second conductive spiral pattern (90, 110;

     87).

91. The LC marker construction as set forth in claim 77, wherein

a stable pairwise superposition of conductor strip portions forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor strip portions, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

conductor strip portion forming part of the first conductive spiral pattern (89, 109;

     87);

dielectric layer (88);

adhesive layer (62);

dielectric layer (88);

conductor strip portion forming part of the second conductive spiral pattern (90, 110;

     87).

92. The LC marker construction as set forth in claim 91, wherein

said first and second adhesive layers (62) adhesively combine with one another to a fixing center layer.

93. The LC marker construction as est forth in claim 77, wherein

a stable pairwise superposition of conductor strip portions forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor strip portions, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

conductor strip portion forming part of the first conductive spiral pattern (89, 109;

     87);

dielectric layer (88);

first adhesive layer (62);

second adhesive layer (62);

dielectric layer (88);

conductor strip portion forming part of the second conductive spiral pattern (90, 110;

     87).

94. The LC marker construction as set forth in claim 77, wherein

a stable pairwise superposition of conductor strip portions forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor strip portions, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

conductor strip portion forming part of the first conductive spiral pattern (89, 109;

     87);

adhesive layer (62);

first dielectric layer (81);

second dielectric layer (93);

adhesive layer (62);

conductor strip portion forming part of the second conductive spiral pattern (90, 110;

     87).

95. The LC marker construction as set forth in claim 77, wherein

a stable pairwise superposition of conductor strip portions forming stripline segments is effected by the fixing power of an adhesive material (62) present and effective at least within projected spaces between mutually superposed conductor strip portions, and wherein thus over at least part of the area occupied by the entire construction within cross sections of stripline segments a sequence of layers exists which includes at least the following layers:

conductor strip portion forming part of the first conductive spiral pattern (89, 109;

     87);

first dielectric layer (88);

adhesive layer (62);

second dielectric layer (81;

     93)

adhesive layer (62);

third dielectric layer (88);

conductor strip portion forming part of the second conductive spiral pattern (90, 110;

     87).

96. The LC marker construction as set forth in claim 77, wherein

said stripline portions are trapped between two flexible sheets of a cover material (65, 165) having a carrier function.

97. The LC marker construction as set forth in claim 96, wherein

said stripline portions are fixed between said two flexible sheets of a cover material (65, 165) at least by a layer of a sealing or fixing material (61) provided and effective at least between outwardly disposed surfaces of first and second conductor strip portions (89, 90;

109;

110;

87,

     87) forming said stripline portions and the respective one of said two flexible sheets.

98. The LC marker construction as set forth in claim 97, wherein

said sealing or fixing material (61) is not same as the material from which said at least one additional layer (62) is made.

99. The LC marker construction as set forth in claim 77, wherein

said LC marker construction has a square to rectangular shape and wherein

at least one layer is provided having the shape of a strip, which strip is arranged to cross conductor strip portions arranged substantially in parallel to one of both edge directions of the construction and extends, between respective two opposing edges, over the full length or width of the construction.