Electrode substrate, display device, input device, and method of manufacturing electrode substrate

Patent metadata

Field	Value
Publication number	US-10310678-B2
Application number	US-201514686155-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	Apr 15, 2014
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

When a protective film is formed so as to cover an electrode, a position of an end portion of the protective film is highly accurately adjusted. An electrode substrate includes a second substrate, and a sensing electrode continuously formed on the second substrate from a first region on an upper surface of the second substrate via a second region on the upper surface of the second substrate over a third region on the upper surface of the second substrate. Also, the electrode substrate includes a concave/convex pattern formed on the sensing electrode or the second substrate in the second region, and a protective film formed in the first region and the second region so as to cover the sensing electrode. An end portion of the protective film on the third region side is positioned on the concave/convex pattern.

First claim

The invention is claimed as follows:

1. An electrode substrate comprising:
a first substrate including a first region, a second region and a third region, the second region arranged between the first region and the third region;
a first electrode continuously formed from the first region to the third region in the first direction on the first substrate, the first electrode including a plurality of concave/convex portions in the second region, each of the concave/convex portions including a first portion and a second portion, the first portion and the second portion arranged in the first direction, and a width of the first portion different from a width of the second portion in a second direction crossing to the first direction;
and
a protective film formed on the first electrode in the first region,
wherein the protective film formed on first one of the concave/convex portions in the second region,
wherein the protective film doesn't formed on second one of the concave/convex portions in the second region and the first electrode in the third region, the second one of the concave/convex portions is arranged nearer to the third region than the first one of the concave/convex portions.

2. The electrode substrate according to claim 1 ,
wherein the concave/convex portions are formed on an upper surface of the first electrode.

3. The electrode substrate according to claim 1 ,
wherein each of the concave/convex portions is a projecting portion formed so as to project from a side surface of the first electrode, and
the end portion of the protective film on the third region side is positioned on a portion of the first electrode formed in the second region.

4. The electrode substrate according to claim 1 ,
wherein the each of concave/convex portions is a concave portion formed from a side surface of the first electrode toward a center axis of the first electrode.

5. The electrode substrate according to claim 1 , further comprising:
an anisotropic conductive film formed in the second region and the third region so as to cover the first electrode; and
a wiring substrate disposed on the anisotropic conductive film,
wherein the wiring substrate includes a second electrode formed on a second main surface of the wiring substrate,
the second electrode is disposed so as to be opposed to a portion of the first electrode formed in the third region via the anisotropic conductive film,
the first electrode and the second electrode opposed to each other are electrically connected to each other via the anisotropic conductive film, and
an end portion of the anisotropic conductive film on a first region side is positioned on the protective film.

6. The electrode substrate according to claim 1 ,
wherein a width of a portion of the first electrode formed in the third region in the second direction is larger than a width of a portion of the first electrode formed in the first region in the second direction.

7. The electrode substrate according to claim 1 ,
wherein
the concave/convex portions each extend in the second direction and are arrayed in the first direction.

8. The electrode substrate according to claim 1 ,
wherein the concave/convex portions are a position adjustment pattern for adjusting a position of the end portion of the protective film on the third region side.

9. A display device comprising:
the electrode substrate according to claim 1 ;
an opposing substrate which is opposed to the electrode substrate; and
a display control unit provided between the opposing substrate and the electrode substrate.

10. An input device,
a first substrate including a first region, a second region and a third region, the second region arranged between the first region and the third region;
a plurality of detection electrodes arranged in the first region, a plurality of first electrodes coupled to the detection electrodes respectively in the first region, each of the first electrode continuously formed from the first region to the third region in the first direction on the first substrate, each of the first electrodes including a plurality of concave/convex portions in the second region, each of the concave/convex portions including a first portion and a second portion, the first portion and the second portion arranged in the first direction, and a width of the first portion different from a width of the second portion in a second direction crossing to the first direction; and
a protective film formed on the first electrode in the first region,
wherein the protective film formed on first one of the concave/convex portions in the second region,
wherein the protective film doesn't formed on second one of the concave/convex portions in the second region and the first electrode in the third region, the second one of the concave/convex portions is arranged nearer to the third region than the first one of the concave/convex portions,
wherein a portion of each of the first electrodes in the third region is a pad, and is configured to output a detection signal from each of the detection electrodes.

Assignees

• Japan Display Inc

Inventors

• Ishizaki Koji
• Sonoda Daisuke
• Ishigaki Toshimasa

Classifications

• H05K3/28 Primary

  Applying non-metallic protective coatings {(H05K3/0091 takes precedence; methods for intermediate insulating layers for build-up multilayer circuits H05K3/4673)} · CPC title

• H05K2201/09381

  Shape of non-curved single flat metallic pad, land or exposed part thereof; Shape of electrode of leadless component · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• H05K1/11

  Printed elements for providing electric connections to or between printed circuits · CPC title