Capacitive transparent touch sheet having excellent visibility and durability

Patent metadata

Field	Value
Publication number	US-9448678-B2
Application number	US-201314403522-A
Country	US
Kind code	B2
Filing date	May 28, 2013
Priority date	May 30, 2012
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A capacitive transparent touch sheet has excellent visibility and durability without changing the sensitivity, size, or the like of a touch panel. The capacitive transparent touch sheet comprises: a first conductive sheet including a first substrate to be adhered to the hard substrate, and a plurality of strip shaped first electrodes formed separately on a surface of the first substrate to be adhered to the hard substrate; a second conductive sheet including a second substrate disposed to oppose the first substrate, a plurality of strip shaped second electrodes formed on a surface of the second substrate opposing the first substrate and arranged to cross the first electrodes, and at least one insulation part formed continuously with the second electrodes, the at least one insulation part having a thickness the same as that of the second electrodes; and an adhesive layer that bonds the first and second conductive sheets together.

First claim

The invention claimed is:

1. A capacitive transparent touch sheet for adhering to a transparent hard substrate comprising:
a first conductive sheet that includes a first substrate to be adhered to the hard substrate, and a plurality of strip shaped first electrodes formed separately on a surface of the first substrate to be adhered to the hard substrate, the first electrodes comprising a transparent metal oxide;
a second conductive sheet that includes a second substrate disposed to oppose the first substrate, a plurality of strip shaped second electrodes formed on a surface of the second substrate opposing the first substrate and arranged to cross the first electrodes, and at least one insulation part formed continuously with the second electrodes; and
an adhesive layer that bonds the first conductive sheet and the second conductive sheet together;
the second electrodes comprising a plurality of conductive nanofibers, each of conductive nanofibers being conductively connected, and a binder resin for holding the plurality of conductive nanofibers on the second substrate; and
the at least one insulation part having a thickness the same as that of the second electrodes and comprising the binder resin that constitutes the second electrodes substantially without the conductive nanofibers.

2. The capacitive transparent touch sheet according to claim 1 , wherein
the transparent metal oxide is ITO.

3. The capacitive transparent touch sheet according to claim 1 , wherein
the conductive nanofibers comprise silver.

4. The capacitive transparent touch sheet according to claim 1 , wherein
the thickness of the second electrodes is greater than the thickness of the first electrodes.

5. The capacitive transparent touch sheet according to claim 1 , wherein
the width of each of the second electrodes is greater than the width of the at least one insulation part.

6. The capacitive transparent touch sheet according to claim 1 , further comprising:
a hard coat layer formed on a surface of the second substrate opposite the surface where the second electrodes are formed.

7. A capacitive transparent touch panel comprising:
the capacitive transparent touch sheet according to claim 1 ; and
a transparent base material is adhered onto the first substrate of the capacitive transparent touch sheet.

8. A capacitive transparent touch sheet for adhering to a transparent hard substrate comprising:
a first conductive sheet including a first substrate to be adhered to the hard substrate, and a plurality of strip shaped first electrodes formed separately on the first substrate, the first electrodes comprising a transparent metal oxide;
a second conductive sheet including a second substrate disposed to oppose the first substrate, a plurality of strip shaped second electrodes formed on a surface of the second substrate on the side opposite the surface opposing the first substrate and arranged to cross the first electrodes, and at least one insulation part formed continuously with the second electrodes; and
an adhesive layer that bonds the first conductive sheet and the second conductive sheet together;
the second electrodes comprising a plurality of conductive nanofibers, each of conductive nanofibers being conductively connected, and a binder resin for holding the plurality of conductive nanofibers on the second substrate; and
the at least one insulation part having a thickness the same as that of the second electrodes and consisting only of the binder resin that constitutes the second electrodes without the conductive nanofibers.

9. The capacitive transparent touch sheet according to claim 8 , wherein
the transparent metal oxide is ITO.

10. The capacitive transparent touch sheet according to claim 8 , wherein
the conductive nanofibers comprise silver.

11. The capacitive transparent touch sheet according to claim 8 , wherein
the thickness of the second electrodes is greater than the thickness of the first electrodes.

12. The capacitive transparent touch sheet according to claim 8 , wherein
the width of each of the second electrodes is greater than the width of the at least one insulation part.

13. The capacitive transparent touch sheet according to claim 8 , further comprising:
a hard coat layer formed on a surface of the second substrate opposite the surface where the second electrodes are formed.

14. A capacitive transparent touch panel comprising:
the capacitive transparent touch sheet according to claim 8 ; and
a transparent base material is adhered onto the first substrate of the capacitive transparent touch sheet.

15. A capacitive transparent touch sheet for adhering to a transparent hard substrate comprising:
a first conductive sheet that includes a first substrate to be adhered to the hard substrate, and a plurality of strip shaped first electrodes formed separately on a surface of the first substrate;
a second conductive sheet that includes a second substrate disposed to oppose the first substrate, a plurality of strip shaped second electrodes formed on a surface of the second substrate and arranged to cross the first electrodes, and at least one insulation part formed continuously with the second electrodes, the at least one insulation part having a thickness the same as that of the second electrodes; and
an adhesive layer that bonds the first conductive sheet and the second conductive sheet together;
the second electrodes comprising a plurality of conductive nanofibers, each of conductive nanofibers being conductively connected, and a binder resin for holding the plurality of conductive nanofibers on the second substrate; and
the at least one insulation part comprising the binder resin that constitutes the second electrodes substantially without the conductive nanofibers.

16. The capacitive transparent touch sheet according to claim 15 , wherein
the thickness of the second electrodes is greater than the thickness of the first electrodes.

17. The capacitive transparent touch sheet according to claim 15 , wherein
the width of each of the second electrodes is greater than the width of the at least one insulation part.

18. The capacitive transparent touch sheet according to claim 15 , further comprising:
a hard coat layer formed on a surface of the second substrate opposite the surface where the second electrodes are formed.

19. A capacitive transparent touch panel comprising:
the capacitive transparent touch sheet according to claim 15 ; and
a transparent base material is adhered onto the first substrate of the capacitive transparent touch sheet.

Assignees

• Nissha Printing

Inventors

• Tokuno Katsumi
• Yoshida Takanori
• Nii Yoshihiro
• Ueno Takako
• Abe Yuhei
• Aisaka Tsunetomo
• Seki Eiko
• Kawashima Yoko
• Maenaka Kaori
• Takahashi Kazumasa

Classifications

• B29L2031/3437

  Cellular phones · CPC title

• H05K2201/0999

  Circuit printed on or in housing, e.g. housing as PCB; Circuit printed on the case of a component; PCB affixed to housing · CPC title

• B29C45/14065 Primary

  Positioning or centering articles in the mould · CPC title

• H05K3/101

  by casting or moulding of conductive material · CPC title

• H05K3/4015

  using auxiliary conductive elements, e.g. pieces of metal foil, metallic spheres · CPC title