DUAL-SUBSTRATE CAPACITIVE TOUCH PANEL

• US 20130277196A1
• Filed: 06/17/2013
• Published: 10/24/2013
• Est. Priority Date: 05/11/2010
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: MI, David
• Granted Patent: US 8,937,610 B2
• Time in Patent Office: Days
• US Class Current: 200/600
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: H03K 17/962 Capacitive touch switches

Abstract

A capacitive touch panel sequentially has a first glass substrate, a lower touch sensitive layer, a lower insulation ink layer, a lower conductor layer, a lower insulation layer, a lower conductive adhesive layer, a flexible circuit board, a transparent insulation adhesive layer, an upper insulation layer, an upper conductive adhesive laver, an upper conductor layer, an upper insulation ink layer, an upper touch sensitive layer and a second glass substrate. The aforementioned structure allows fabrication of the capacitive touch panel to be separated into a lower panel fabrication process and an upper panel fabrication process. The two independent fabrication processes prevent the capacitive touch panel from being damaged in one of the processes when the process is completed so as to increase the yield in production and further facilitate producing large-size touch panel.

Claims

1. A capacitive touch panel, comprising:

a lower panel comprising;

a first glass substrate having a first circuit surface;

a lower touch sensitive layer mounted on the first circuit surface of the first glass Substrate; and

a lower conductor layer mounted on the first circuit surface of the first glass substrate and electrically .connecting the lower touch sensitive layer;

an upper panel comprising;

a second glass substrate having a second circuit surface;

an upper touch sensitive layer mounted on the second circuit surface of the second glass Substrate;

an upper insulation ink layer mounted on an edge portion of the upper touch sensitive layer, and having a plurality of upper through slots formed through the upper insulation ink layer and each filled in with an upper conductive layer having a color identical to that of the upper insulation ink layer; and

an upper conductor layer mounted on the upper insulation ink layer and electronically connecting the upper touch sensitive layer via the upper conductive layer; and

a transparent insulation adhesive layer interposed between the upper panel and the lower

2. The capacitive touch panel as claimed in claim 1, wherein the lower panel further comprises a lower insulation layer mounted on the lower conductor layer and having a lower indentation to partially expose the lower conductor layer.

3. The capacitive touch panel as claimed in claim 2, wherein the lower panel further comprises a lower conductive adhesive layer mounted in the lower indentation of the lower insulation layer to cover the exposed portion of the lower conductor layer.

4. The capacitive touch panel as claimed in claim 1, wherein the upper panel further comprises an upper insulation layer mounted on the upper conductor layer and having an upper indentation to partially expose the upper conductor layer.

5. The capacitive touch panel as claimed in claim 4, wherein the upper panel further comprises an upper conductive adhesive layer mounted in the upper indentation of the upper insulation layer.

6. The capacitive touch panel as claimed in claim 3, further comprising a flexible circuit board mounted on the lower conductive adhesive layer, extending outwardly beyond the first glass substrate, and electrically connected with the lower touch sensitive layer through the lower conductive adhesive layer.

7. The capacitive touch panel as claimed in claim 5, wherein the upper conductive adhesive layer is formed by at least one chosen from anisotropic conductive film (ACF) and anisotropic conductive paste (ACP).

8. The capacitive touch pane as claimed in claim 6, further comprising an upper protection layer.

9. The capacitive touch panel as claimed in claim 8, wherein the flexible circuit board has a top surface and a bottom surface, wherein the bottom surface is attached to the lower conductive adhesive layer and the upper protection layer is bonded to the top surface of the flexible circuit board and a side of the second glass substrate.

10. A capacitive touch panel, comprising:

a first glass substrate having a first circuit surface;

a lower touch sensitive layer mounted on the first circuit surface of the first glass substrate;

a lower conductor layer mounted on the first circuit surface of the first glass substrate and electrically connecting the lower touch sensitive layer;

a transparent insulation adhesive layer mounted on the lower conductor laver;

an upper conductor layer mounted on the transparent insulation adhesive layer;

an upper insulation ink layer mounted on the upper conductor layer, and having a plurality of upper through slots formed through the upper insulation ink layer and each filled in with a upper conductive layer having a color identical to that of the upper insulation ink layer;

an upper touch sensitive layer mounted on the transparent insulation adhesive layer, partially covering the upper insulation ink layer, and electronically connecting the upper conductor layer via the upper conductive layers in the corresponding upper through slots of the upper insulation ink layer; and

a second glass substrate mounted on the upper touch sensitive layer and the upper insulation ink layer and having a second circuit surface in contact with the upper touch sensitive layer and the upper insulation ink layer.

11. The capacitive touch panel as claimed in claim 10, further comprising a lower insulation layer, wherein the lower insulation layer is configured on one surface of the lower conductor layer and the lower touch sensitive layer is configured on the other surface of the lower conductor layer and the lower insulation layer has a lower indentation to partially expose the lower conductor layer.

12. The capacitive touch panel as claimed in claim 11, further comprising a lower conductive adhesive layer mounted in the lower indentation of the lower insulation layer to cover the exposed portion of the lower conductor layer.

13. The capacitive touch panel as claimed in claim 10, further comprising an upper insulation layer, wherein the upper insulation layer is configured on one surface of the upper conductor layer and the upper touch sensitive layer is configured on the other surface of the upper conductor layer and the upper insulation layer has an upper indentation to partially expose the upper conductor layer.

14. The capacitive touch panel as claimed in claim 13, further comprising an upper conductive adhesive layer mounted in the upper indentation of the upper insulation layer.

15. The capacitive touch panel as claimed in claim 12, further comprising a flexible circuit board mounted on the lower conductive adhesive layer, extending outwardly beyond the first glass substrate, and electrically connected with the lower touch sensitive layer through the lower conductive adhesive layer.

16. The capacitive touch panel as claimed in claim 14, wherein the upper conductive adhesive layer is formed by at least one chosen from anisotropic conductive film (ACF) and anisotropic conductive paste (ACP).

17. The capacitive touch panel as claimed in claim 15, further comprising an upper protection layer.

18. The capacitive touch panel as claimed in claim 17, wherein the flexible circuit board has a top surface and a bottom surface, wherein the bottom surface is attached to the lower conductive adhesive layer and the upper protection layer is bonded to the top surface of the flexible circuit board and a side of the second glass substrate.

19. The capacitive touch panel as claimed in claim 18, further comprising a lower protection layer bonded to the bottom surface of the flexible circuit board and a side of the first glass substrate.

20. A capacitive touch panel, comprising:

a lower panel comprising;

a first glass substrate having a first circuit surface;

a lower touch sensitive layer mounted on the first circuit surface of the first glass substrate; and

a lower conductor layer mounted on the first circuit surface of the first glass substrate and electrically connecting the lower touch sensitive layer;

an upper panel comprising;

a second glass substrate having a second circuit surface;

an upper touch sensitive layer mounted on the second circuit surface of the second glass substrate;

an upper insulation ink layer mounted on an edge portion of the upper touch sensitive layer, and having a plurality of upper through slots formed through the upper insulation ink layer and each filled in with an upper conductive layer having a color identical to that of the upper insulation ink layer; and

an upper conductor layer mounted on the upper insulation ink layer and electronically connecting the upper touch sensitive layer via the upper conductive layer; and

wherein the lower panel is spaced apart from the upper panel.

21. The capacitive touch panel as claimed in claim 20, wherein the lower panel and the upper panel are spaced by a transparent insulation adhesive layer.

22. The capacitive touch panel as claimed in claim 20, wherein the lower panel further comprises a lower insulation layer mounted on the lower conductor layer and having a lower indentation to partially expose the lower conductor layer.

23. The capacitive touch panel as claimed in claim 22, wherein the lower panel further comprises a lower conductive adhesive layer mounted in the lower indentation of the lower insulation layer to cover the exposed portion of the lower conductor layer.

24. The capacitive touch panel as claimed in claim 20, wherein the upper panel further comprises an upper insulation layer mounted on the upper conductor layer and having an upper indentation to partially expose the upper conductor layer.

25. The capacitive touch panel as claimed in claim 24, wherein the upper panel further comprises an upper conductive adhesive layer mounted in the upper indentation of the upper insulation layer.

26. The capacitive touch panel as claimed in claim 23, further comprising a flexible circuit board mounted on the lower conductive adhesive layer, extending outwardly beyond the first glass substrate, and electrically connected with the lower touch sensitive layer through the lower conductive adhesive layer.

27. The capacitive touch panel as claimed in claim 25, wherein the upper conductive adhesive layer is formed by at least one chosen from anisotropic conductive film (ACF) and anisotropic conductive paste (ACP).

28. The capacitive touch panel as claimed in claim 26, further comprising an upper protection layer.

29. The capacitive touch panel as claimed in claim 28, wherein the flexible circuit board has a top surface and a bottom surface, wherein the bottom surface is attached to the lower conductive adhesive layer and the upper protection layer is bonded to the top surface of the flexible circuit board and a side of the second glass substrate.

30. The capacitive touch panel as claimed in claim 29, further comprising a lower protection layer bonded to the bottom surface of the flexible circuit board and a side of the first glass substrate.