Reflection type display device and electronic device

• US 20020109660A1
• Filed: 04/02/2002
• Published: 08/15/2002
• Est. Priority Date: 02/06/1997
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Fukunaga, Takeshi
• Granted Patent: US 7,176,993 B2
• Time in Patent Office: Days
• US Class Current: 345/92
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133357 Planarisation layers
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 2203/02 reflective

Abstract

Among insulating layers for insulating and separating first wiring lines, second wiring lines, and pixel electrodes constituting a reflection type display device, at least one layer is made of an insulating film in which a carbon-based material or a pigment is dispersed. By this structure, a conventional step of forming a black mask can be greatly simplified.

Claims

1. A semiconductor device comprising:

a pixel thin film transistor provided over a substrate;

a driver thin film transistor provided over said substrate;

a logic circuit provided over said substrate;

a light shading film provided over said pixel thin film transistor and said driver thin film transistor and said logic circuit; and

a pixel electrode provided over said light shading film.

5. A device according to claim 1 wherein said substrate comprises a glass.

9. A device according to claim 1 wherein said light shading film contains a carbon-based material.

13. A device according to claim 1 wherein said light shading film contains a pigment.

17. A device according to claim 1 wherein said semiconductor device is incorporated into at least one selected from the group consisting of a mobile computer, a head mount display, a front type projector, a portable telephone and a video camera.

2. A semiconductor device comprising:

a pixel thin film transistor provided over a substrate;

a driver thin film transistor provided over said substrate;

a memory provided over said substrate;

a light shading film provided over said pixel thin film transistor and said driver thin film transistor and said memory; and

a pixel electrode provided over said light shading film.

6. A device according to claim 2 wherein said substrate comprises a glass.

10. A device according to claim 2 wherein said light shading film contains a carbon-based material.

14. A device according to claim 2 wherein said light shading film contains a pigment.

18. A device according to claim 2 wherein said semiconductor device is incorporated into at least one selected from the group consisting of a mobile computer, a head mount display, a front type projector, a portable telephone and a video camera.

3. A semiconductor device comprising:

a pixel thin film transistor provided over a substrate;

a driver thin film transistor provided over said substrate;

a CPU provided over said substrate;

a light shading film provided over said pixel thin film transistor and said driver thin film transistor and said CPU; and

a pixel electrode provided over said light shading film.

7. A device according to claim 3 wherein said substrate comprises a glass.

11. A device according to claim 3 wherein said light shading film contains a carbon-based material.

15. A device according to claim 3 wherein said light shading film contains a pigment.

19. A device according to claim 3 wherein said semiconductor device is incorporated into at least one selected from the group consisting of a mobile computer, a head mount display, a front type projector, a portable telephone and a video camera.

4. A semiconductor device comprising:

a pixel thin film transistor provided over a substrate;

a driver thin film transistor provided over said substrate;

a clock control circuit provided over said substrate;

a light shading film provided over said pixel thin film transistor and said driver thin film transistor and said clock control circuit; and

a pixel electrode provided over said light shading film.

8. A device according to claim 4 wherein said substrate comprises a glass.

12. A device according to claim 4 wherein said light shading film contains a carbon-based material.

16. A device according to claim 4 wherein said light shading film contains a pigment.

20. A device according to claim 4 wherein said semiconductor device is incorporated into at least one selected from the group consisting of a mobile computer, a head mount display, a front type projector, a portable telephone and a video camera.