Display device and manufacturing method thereof, and semiconductor device and manufacturing method thereof

• US 8,063,405 B2
• Filed: 06/16/2009
• Issued: 11/22/2011
• Est. Priority Date: 06/17/2008
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Yagi, Iwao
• Primary Examiner(s): Thai; Luan C
• Application Number:
  US12/485,582
• Publication Number:
  US 20090309103A1
• Time in Patent Office: 889 Days
• Field of Search: 257/72, 257/69, 257/40, 257/E21.414, 257/E29, 257/294
• US Class Current: 257/72
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: H10K 19/10 comprising field-effect transistors

Abstract

A display device includes source/drain electrodes on a substrate, a pixel electrode, an insulating partition wall layer, a channel-region semiconductor layer. The source/drain electrodes and the pixel electrode are formed on the substrate and in contact with each other. The insulating partition wall layer is formed on the substrate and provided with a first opening extending to between the source electrode and the drain electrode and a second opening formed on the pixel electrode and extending to the pixel electrode. The channel-region semiconductor layer is formed on the bottom of the first opening. The insulating film is formed on the partition wall layer so as to cover the first opening including the channel-region semiconductor layer. The oriented film covers the first opening from above the insulating film and the second opening from the pixel electrode.

Claims

1. A display device, comprising:

a source electrode and a drain electrode of a thin-film transistor formed on a substrate;

a pixel electrode formed on said substrate and in contact with said source electrode or said drain electrode;

an insulating partition wall layer formed on said substrate and having (a) a first opening extending between said source electrode and said drain electrode and (b) a second opening formed on said pixel electrode and extending to said pixel electrode;

a channel-region semiconductor layer formed on the bottom of said first opening;

an insulating film formed on said insulating partition wall layer so as to cover said first opening and said channel-region semiconductor layer; and

an oriented film covering said first opening from the top of said insulating film and covering said second opening from the top of said pixel electrode.

2. The display device according to claim 1, further comprising a semiconductor layer made of the same material as that of said channel-region semiconductor layer and that is formed on the upper part of said insulating partition wall layer.

3. The display device according to claim 1, wherein said channel-region semiconductor layer is made of an organic material.

4. The display device according to claim 1, further comprising:

an opposing substrate facing said substrates; and

a liquid crystal layer disposed between said substrate and said opposing substrate.

5. The display device according to claim 1, further comprising:

a gate electrode of the thin-film transistor and a gate insulating film formed between said substrate and said channel-region semiconductor layer,

wherein,

said thin-film transistor is a bottom-gate type transistor.

6. The display device according to claim 1, wherein:

said pixel electrode is a transmissive display electrode; and

a reflective pixel electrode is electrically connected to said transmissive display electrode on the upper layer of said insulating partition wall layer through said insulating film.

7. The display device according to claim 6, further comprising:

a third opening formed in said insulating partition wall layer and extending to said source electrode or said drain electrode; and

a connection hole extending to said source electrode or said drain electrode in the inner side of said third opening and that is formed in at least said insulating film,

wherein,

said reflective pixel electrode is connected to said transmissive display electrode through said source electrode or said drain electrode exposed at the bottom of said connection hole.

8. The display device according to claim 6, further comprising:

a third opening extending to said source electrode or said drain electrode and that is formed in said insulating partition wall layer; and

a semiconductor layer placed on the bottom of said third opening and made of the same material as that of said channel-region semiconductor layer,

wherein,

a connection hole is formed in said insulating film and said semiconductor layer placed on the bottom of said third opening;

said connection hole extends to said source electrode or said drain electrode in the inside of said third opening, while being insulated from said semiconductor layer on said insulating partition wall layer; and

said reflective pixel electrode is connected to said transmissive display electrode through said source electrode or said drain electrode exposed at the bottom of said connection hole.

9. The display device according to claim 6, wherein a height of the position of said reflective pixel electrode with respect to a height of the position of said transmissive display electrode is adjusted with reference to a height of said insulating partition wall layer.

10. The display device according to claim 1, further comprising a gate electrode of the thin-film transistor formed on said channel-region semiconductor layer through a gate insulating film,

wherein,

said thin-film transistor is a top-gate type transistor.

11. The display device according to claim 1, wherein said pixel electrode is a conductive pattern.