LAMINATED DIGITIZER SENSOR

• US 20090107736A1
• Filed: 10/28/2008
• Published: 04/30/2009
• Est. Priority Date: 10/30/2007
• Status: Abandoned Application

• Current Assignee: N-Trig Ltd (Microsoft Corporation)
• Original Assignee: N-Trig Ltd (Microsoft Corporation)
• Inventors: Balila, Ohad Israel, BEN-ELIYAHU, Aviezer, Aksenton, Yulia
• Application Number:
  US12/259,340
• Publication Number:
  US 20090107736A1
• Time in Patent Office: Days
• US Class Current: 178/18.10
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: H05K 3/323 by applying an anisotropic conductive adhesive layer over an array of pads
• CPC Class Codes: H05K 3/368 parallel to each other H05K3/361 takes precedence

Abstract

A laminated transparent digitizer sensor assembly comprises a first transparent layer patterned on one surface with a first array of conductors and an array of conductive elements electrically isolated from the first array of conductors; and a second transparent layer patterned on one surface with a second array of conductors; wherein the first and second layers are laminated with non-conducting transparent laminating material, such that the patterned surfaces face each others and wherein conductive material is provided between the conductive elements and conductors of the second array of conductors.

Claims

1. A laminated transparent digitizer sensor comprising:

a first transparent layer patterned on one surface with a first array of conductors and an array of conductive elements electrically isolated from the first array of conductors; and

a second transparent layer patterned on one surface with a second array of conductors;

wherein the first and second layers are laminated with non-conducting transparent laminating material, such that the patterned surfaces face each other, and wherein conductive material is provided between the conductive elements and conductors of the second array of conductors.

2. The sensor according to claim 1, wherein the first and second arrays of conductors are first and second arrays of conductive lines.

3. The sensor according to claim 1, wherein the conductive material is an anisotropic conductive material.

4. The sensor according to claim 3 wherein the anisotropic conductive material is conductive in an axis perpendicular to the patterned surfaces of the first and second layer.

5. The sensor according to claim 2, wherein the first array of conductive lines is parallel to a first axis of a grid and the second array of conductive lines is parallel to a second axis of the grid and together the first and second array form a grid.

6. The sensor according to claim 1, wherein the first and second layers are constructed from glass substrates.

7. The sensor according to claim 1 comprising one or more spacers positioned between the first and second layer, the spacers defining a controlled distance between the first and second array of conducting lines.

8. The sensor according to claim 1, wherein the extent of the second layer is such that ends of the first array of conductors as well as a portion of each of the conductive elements are exposed.

9. The sensor according to claim 8, wherein the sensor is configured for mounting at least one circuit board mounted over an area exposed on the first layer, the at least one circuit board configured for being electrically connected to at least a portion of the conductive lines of the first array of conductive lines and the array of conductive elements patterned on the first layer.

10. The sensor assembly according to claim 9, wherein the at least one circuit board includes conductive pads, wherein the conductive pads of the circuit board are configured for mating with conductive lines of the first array of conductive lines and with the array of conductive elements patterned on the first layer.

11. The sensor assembly according to claim 2, wherein the first layer is additionally patterned with conductive pads on at least one end the conductive lines of the first array of conductive lines.

12. The sensor assembly according to claim 11, wherein the first layer is additionally patterned with conductive pads on at least one end the conductive elements.

13. The sensor assembly according to claim 12, wherein the sensor is configured for mounting at least one circuit board over an area exposed on the first layer, the at least one circuit board configured for being electrically connected to at least a portion of the conductive pads of the first array of conductive lines and the array of conductive elements.

14. The sensor assembly according to claim 13, wherein the at least one circuit board includes conductive pads, wherein the conductive pads of the circuit board are configured to mate with conductive pads on the first layer.

15. The sensor assembly according to claim 1, wherein a surface of the first layer or second layer opposite the patterned surface is configured for user interaction with the digitizer sensor.

16. The sensor assembly according to claim 15 wherein the user interaction is at least one of stylus, fingertip touch, and a token.

17. The sensor assembly according to claim 1, wherein the conductors of the first and second array are transparent or are thin enough so that they do not substantially interfere with viewing an electronic display behind the lines.

18. A method for manufacturing a laminated transparent digitizer sensor assembly, the method comprising:

patterning a surface of a first layer with a first array of conductors and an array of conductive elements electrically isolated from the first array of conductors;

patterning a surface of a second layer with a second array of conductors;

providing conductive material between at least a portion of each conductive elements of the array of conductive elements and conductors of second array of conductors;

aligning the second layer over the first layer such that the patterned surfaces face each other; and

providing non-conductive laminating material between the first and second layer.

19. The method according to claim 18 wherein the first array of conductors is parallel to a first axis of a grid and the second array of conductors is parallel to a second axis of the grid and together the first and second arrays form a grid.

20. The method according to claim 18, wherein the first and second layers are constructed from glass substrates.

21. The method according to claim 18 comprising positioning at least one spacer, the spacer operative to define a distance between the first and second layer of the laminated sensor.

22. The method according to claim 21, wherein the at least one spacer is additionally operative to separate an area over which the conductive material is dispensed and the non-conductive material is dispensed.

23. The method according claim 18 comprising:

dispensing a first non-conductive material having a first viscosity on the first layer to form a frame with one or more gaps over which the second layer is positioned;

curing the first non-conductive material; and

dispensing a second non-conductive material having a second viscosity lower than the first viscosity in between the first and second layer through the one or more gaps of the frame.

24. The method according to claim 23 wherein the frame is the spacer.

25. The method according to claim 18, comprising dispensing conductive material over ends of the first array of conducting lines and over a portion of each of the conductive elements.

26. The method according to claim 18 comprising mounting at least one circuit board on ends of the first array of conductors as well as a portion of each of the conductive conductors.

27. The method according to claim 26 wherein the at least one circuit board is an ‘

L’

shaped circuit board including conductive pads that mate with each of the conductive lines and conductive elements on the first layer.

28. The method according to claim 18 comprising patterning conductive pads on ends of at least one of the first array of conductors and the array of conductive elements.

29. A laminated transparent digitizer sensor assembly comprising:

a first layer patterned on one surface with a first array of conductors;

a second layer patterned on one surface with a second array of conductors positioned over the first layer such that the patterned surfaces face each other; and

a circuit board positioned between the first and second layer at least along one edge of the layers;

the circuit board including a front and back surface, wherein the circuit board is electrically connected to the first array of conductors from the back surface and to the second array of conductors from the front surface.

30. The sensor assembly according to claim 29 comprising non-conducting transparent laminating material disposed between the first and second layer.

31. The sensor assembly according to claim 29, wherein the conductors are conducting lines.

32. The sensor assembly according to claim 29, wherein the first array of conductive lines is parallel to a first axis of a grid and the second array of conductive lines is parallel to a second axis of the grid and together the first and second arrays form a grid.

33. The sensor assembly according to claim 29, wherein the first and second layers are constructed from glass substrates.

34. The sensor assembly according to claim 29 comprising one or more spacers positioned between the first and second layer.

35. The sensor assembly according to claim 29 comprising a coil, the coil electrically connected to the circuit board and positioned around the at least one circuit board.

36. The sensor assembly according to claim 29, wherein a surface of the first layer or the second layer opposite the patterned surface is configured for user interaction with the digitizer sensor.

37. The sensor assembly according to claim 36, wherein the user interaction is at least one of stylus, fingertip touch, or token.

38. The sensor assembly according to claim 29, wherein the conductive lines of the first and second array are transparent or are thin enough so that they do not substantially interfere with viewing an electronic display behind the lines.