Wireless Ic Tag and Process for Manufacturing the Same

• US 20070229277A1
• Filed: 05/18/2004
• Published: 10/04/2007
• Est. Priority Date: 05/18/2004
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Usami, Mitsuo
• Granted Patent: US 7,692,545 B2
• Time in Patent Office: Days
• US Class Current: 340/572.700
• CPC Class Codes: G06K 19/0775 arrangements for connecting the integrated circuit to the antenna
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/16227 the bump connector connecting to a bond pad of the item
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/07811 Extrinsic, i.e. with electrical conductive fillers
• CPC Class Codes: H01Q 1/22 by structural association with other equipment or articles
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence

Abstract

There is a problem related to radio wave interference, e.g. the shade of radio wave of a radio IC tag, when a plurality of radio IC tags are present in a region of electromagnetic wave. When a plurality of antennas each having a large area are present in the vicinity of the radio IC tag, the radio IC tag easily receives the affect of an antenna conductor. In a plurality of radio IC tags present in a radio wave area, width of the antenna conductor of the radio IC tag is set at 1.0 mm or less. Furthermore, in order to realize an antenna conductor having a small width, an IC tag chip of both side electrode structure having electrodes on the front surface and rear surface of a chip is sandwiched between antennas.

Claims

1. A wireless IC tag comprising:

an IC tag chip having a memory storing specific identification information; and

an antenna, wherein the IC tag chip has at least a congestion control part, and has a function to deliver the identification information via the antenna in response to an inquiry from a reader existing within a communication area,

wherein the antenna is a dipole antenna that is connected to the IC tag chip and includes a pair of antenna conductors extending in an axial direction at both sides of the IC tag chip, and

wherein the width of the antenna conductors is 1.0 mm or less.

6. The wireless IC tag according to claim 1,

wherein the IC tag chip is disposed inside the ends of the antenna conductors.

7. The wireless IC tag according to claim 1,

wherein plane parts for connection are provided along an axial direction of the antenna in the ends of the antenna conductors, and the IC tag chip is sandwiched between the plane parts for connection.

8. The wireless IC tag according to claim 1,

wherein the sectional shape of the antenna conductors is circular, and

wherein the IC tag chip is disposed inside the ends of the antenna conductors.

9. The wireless IC tag according to claim 1,

wherein the IC tag chip has a rectangular plane, and is a double-sided electrode IC tag chip provided with electrodes on the surface and the back surface of the plane, and

wherein the electrodes of the IC tag chip are respectively connected with the plane parts for connection provided in the ends of the antenna conductors.

10. The wireless IC tag according to claim 1,

wherein the antenna conductors have a circular sectional shape,

wherein the IC tag chip has a rectangular plane, and is a double-sided electrode IC tag chip provided with electrodes on the surface and the back surface of the plane, and

wherein the electrodes of the IC tag chip are respectively connected with the plane parts for connection provided along an axial direction in the ends of the antenna conductors.

11. The wireless IC tag according to claim 1,

wherein the electrodes of the IC tag chip exist on the surface and the back surface of the IC tag chip, and

wherein the IC tag chip and the antenna conductors are connected by an anisotropic conductive adhesive.

12. The wireless IC tag according to claim 1,

wherein the widths of the IC tag chip and the antenna conductors are 0.25 mm or less.

13. The wireless IC tag according to claim 7,

wherein the plane parts for connection have antenna hooks extending in a direction orthogonal to an axial direction in the tip ends thereof.

14. The wireless IC tag according to claim 1,

wherein the IC tag chip is connected to an impedance matching part having a slit.

15. Clothing with a wireless IC tag according to claim 1, adhered to a cloth.

16. A tape-like wireless IC tag having two or more of the wireless IC tags according to claim 1,

wherein the antenna conductors have a length as the antenna conductors for two sets of adjacent wireless IC tags, a pattern in which the IC tag chip exists in both ends of each of the antenna conductors is repeated, and the antenna conductors have a function as a tape carrier.

2. A wireless IC tag comprising:

an IC tag chip having a memory storing specific identification information; and

an antenna, wherein the IC tag chip has at least a rectifying part and a congestion control part, and has a function to deliver the identification information via the antenna in response to an inquiry from a reader existing within a communication area,

wherein radio waves used for communication with the reader are microwaves, and

wherein electrodes are formed on the surface and the back surface of the IC tag chip, the electrodes of the IC tag chip are respectively connected to a pair of antenna conductors of the dipole antenna, and

wherein the width of the antenna conductors is in a range of 0.5 to 0.001 mm.

3. A wireless IC tag targeted for reading of an identification number by multiple congestion controls in a state in which a plurality of wireless IC tags exist within a radio wave area of a reader,

wherein a pair of antenna conductors are connected to the electrodes of the IC tag chip, a dipole antenna extending in an axial direction is formed at both sides of the IC tag chip, and

wherein the width of the IC tag chip and the antenna conductors is 1.0 mm or less.

4. A wireless IC tag is targeted for reading of an identification number by multiple congestion controls in a state in which a plurality of wireless IC tags exist within a radio wave area of a reader,

wherein radio waves used for communication with the reader are microwaves,

wherein the electrodes of the IC tag chip exist on the surface and the back surface of the IC tag chip, and the electrodes of the IC tag chip and a pair of antenna conductors of the dipole antenna are respectively connected, and

wherein the width of the IC tag chip and the antenna conductors is 0.5 mm or less.

5. A wireless IC tag targeted for reading of an identification number by multiple congestion controls in a state in which a plurality of wireless IC tags exist within a radio wave area of a reader,

wherein radio waves used for communication with the reader are microwaves,

wherein the pair of antenna conductors are disposed in an axial direction, and the IC tag chip is sandwiched between the pair of antenna conductors,

wherein the electrodes of the IC tag chip exist on the surface and the back surface of the IC tag chip, and the electrodes of the IC tag chip are respectively connected to the pair of antenna conductors of a dipole antenna, and

wherein the width of the IC tag chip and the antenna conductors is 0.5 mm or less.

17. A process for manufacturing a wireless IC tag comprising:

an IC tag chip storing specific identification information; and

an antenna, wherein the IC tag chip has at least a rectifying part and a congestion control part, and has a function to deliver the identification information via the antenna in response to a reader existing within a communication area,

wherein the antennal of the wireless IC is a dipole antenna that is connected to the IC tag chip and includes a pair of antenna conductors extending in an axial direction at both sides of the IC tag chip, and the width of the antenna conductors is in a range of 1.0 to 0.001 mm,

wherein an antenna material of which the antenna conductors are made is separated laterally, and plane parts for connection are provided along an axial direction in the ends of the separated antennal conductors,

wherein the IC tag chip having double-sided electrodes including bumps on the surface and the back surface thereof is mounted on the plane parts for connection of the antenna conductors, and

wherein the bumps and the antenna conductors are connected.

18. A process for manufacturing the wireless IC tag according to claim 17,

wherein the bumps as the electrodes of the IC tag chip, and the antenna conductors, are supersonically connected.