Display apparatus

• US 6,768,259 B2
• Filed: 06/11/2001
• Issued: 07/27/2004
• Est. Priority Date: 06/13/2000
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hirano, Takashi
• Primary Examiner(s): Patel, Ashok
• Application Number:
  US09/878,878
• Publication Number:
  US 20020036462A1
• Time in Patent Office: 1,142 Days
• Field of Search: 313/506, 313/504, 313/507, 313/111, 257/643, 257/59, 257/72, 257/350, 428/917
• US Class Current: 313/506
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

A display apparatus comprising an interlayer insulation film provided on a substrate in the condition of covering recesses and projections due to a wiring on the substrate, and an organic EL device provided on the interlayer insulation film, wherein the interlayer insulation film comprises a flattening insulation layer formed in the condition of embedding the wiring, and a coat layer formed in the condition of covering the surface of the flattening insulation layer. The flattening insulation layer is a coat film made from an organic compound-containing material, for example, spin on glass or a resin material, and the coat layer is a film of an inorganic material.

Claims

1. A display apparatus, comprising:

a substrate having recesses and projections;

an interlayer insulation film provided on said substrate so that the interlayer insulation film covers the recesses and projections of said substrate; and

a display device provided on said interlayer insulation film, wherein

said interlayer insulation film comprises;

a flattening insulation layer made from an organic compound-containing material and formed so that said flattening insulation layer embeds said recesses and projections; and

a coat layer consisting of an inorganic material and formed so that the coat layer covers the surface of said flattening insulation layer.

2. A display apparatus as set forth in claim 1, wherein said display device is an organic electroluminescence device.

3. A display apparatus as set forth in claim 1, wherein said flattening insulation layer is made from a coat film.

4. A display apparatus as set forth in claim 1, wherein said flattening insulation layer is made from spin on glass or a resin material.

5. A display apparatus as set forth in claim 1, wherein

said interlayer insulation film is provided with a contact hole reaching to a lower layer of said interlayer insulation film, said contact hole having a side circumferential wall, and

said coat layer is formed to cover the side circumferential wall of said contact hole.

6. A display apparatus as set forth in claim 1, wherein said coat layer restrains the release of gas from said flattening insulation layer.