Display device and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-9513528-B2
Application number	US-201514838676-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Mar 14, 2002
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A constitution of the display device of the invention is shown in the following. The display device includes a pixel unit including TFTs of which the active layer contains an organic semiconductor material for forming channel portions in the opening portions in an insulating layer arranged to meet the gate electrodes. The pixel unit further includes a contrast media formed on the electrodes connected to the TFTs for changing the reflectivity upon the application of an electric field, or microcapsules containing electrically charged particles that change the reflectivity upon the application of an electric field. The pixel unit is sandwiched by plastic substrates, and barrier layers including an inorganic insulating material are provided between the plastic substrates and the pixel unit. The purpose of the present invention is to supply display devices which are excellent in productivity, light in weight and flexible.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a first insulating layer comprising nitrogen over the substrate;
a gate electrode over the first insulating layer;
a gate insulating layer over the gate electrode;
a semiconductor layer over the gate insulating layer;
a source electrode and a drain electrode over the semiconductor layer;
a second insulating layer comprising resin over the source electrode and the drain electrode;
a pixel electrode over the second insulating layer; and
a layer comprising a microcapsule over the pixel electrode,
wherein one of the source electrode and the drain electrode is electrically connected to the pixel electrode,
wherein the pixel electrode and the other one of the source electrode and the drain electrode are overlapped with each other, and
wherein the pixel electrode and the gate electrode are overlapped with each other.

2. The display device according to claim 1 , wherein the first insulating layer comprises silicon nitride.

3. The display device according to claim 1 , wherein the semiconductor layer comprises an organic semiconductor material.

4. The display device according to claim 1 , wherein the second insulating layer comprises any of an acrylic resin, a polyimide resin, a polyamide resin, and a phenoxy resin.

5. The display device according to claim 1 , wherein the pixel electrode and the one of the source electrode and the drain electrode are overlapped with each other.

6. The display device according to claim 1 , wherein the substrate has flexibility.

7. A display device comprising:
a substrate comprising polyimide;
a first insulating layer comprising nitrogen over the substrate;
a gate electrode over the first insulating layer;
a gate insulating layer over the gate electrode;
a semiconductor layer over the gate insulating layer;
a source electrode and a drain electrode over the semiconductor layer;
a second insulating layer comprising resin over the source electrode and the drain electrode;
a pixel electrode over the second insulating layer; and
a layer comprising a microcapsule over the pixel electrode,
wherein one of the source electrode and the drain electrode is electrically connected to the pixel electrode,
wherein the pixel electrode and the other one of the source electrode and the drain electrode are overlapped with each other, and
wherein the pixel electrode and the gate electrode are overlapped with each other.

8. The display device according to claim 7 , wherein the first insulating layer comprises silicon nitride.

9. The display device according to claim 7 , wherein the semiconductor layer comprises an organic semiconductor material.

10. The display device according to claim 7 , wherein the second insulating layer comprises any of an acrylic resin, a polyimide resin, a polyamide resin, and a phenoxy resin.

11. The display device according to claim 7 , wherein the pixel electrode and the one of the source electrode and the drain electrode are overlapped with each other.

12. The display device according to claim 7 , wherein the substrate has flexibility.

13. A display device comprising:
a substrate comprising polyimide;
a first insulating layer comprising nitrogen over the substrate;
a gate electrode over the first insulating layer;
a gate insulating layer over the gate electrode;
a semiconductor layer over the gate insulating layer;
a source electrode and a drain electrode over the semiconductor layer;
a second insulating layer comprising resin over the source electrode and the drain electrode;
a pixel electrode over the second insulating layer; and
a layer comprising a microcapsule over the pixel electrode,
wherein each of the source electrode and the drain electrode comprises molybdenum,
wherein one of the source electrode and the drain electrode is electrically connected to the pixel electrode,
wherein the pixel electrode and the other one of the source electrode and the drain electrode are overlapped with each other, and
wherein the pixel electrode and the gate electrode are overlapped with each other.

14. The display device according to claim 13 , wherein the first insulating layer comprises silicon nitride.

15. The display device according to claim 13 , wherein the semiconductor layer comprises an organic semiconductor material.

16. The display device according to claim 13 , wherein the second insulating layer comprises any of an acrylic resin, a polyimide resin, a polyamide resin, and a phenoxy resin.

17. The display device according to claim 13 , wherein the pixel electrode and the one of the source electrode and the drain electrode are overlapped with each other.

18. The display device according to claim 13 , wherein the substrate has flexibility.

Assignees

• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Arai Yasuyuki

Classifications

• G02F1/167 Primary

  by electrophoresis · CPC title

• G09G3/344

  based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167) · CPC title

• G02B26/026

  based on the rotation of particles under the influence of an external field, e.g. gyricons, twisting ball displays (based on orientable dipolar particles G02F1/172; based on electrophoresis G02F1/167) · CPC title

• G02F1/1681

  having two or more microcells partitioned by walls, e.g. of microcup type · CPC title

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title