Patent ID: 9508761
Filing Date: 2016-11-29
CPC Classification: G02F,H01L

Claim Text:
1. A manufacturing method of a display device comprising the steps of: (a) preparing a substrate having an electrode of a thin film transistor; (b) forming a first interlayer film on the electrode; (c) forming a first contact hole on the first interlayer film by removing a part of the first interlayer film; (j) forming a first electrode on the first interlayer film by forming a first conductive film and patterning the first conductive film; (d) forming a second interlayer film on the first interlayer film and in the first contact hole and on the first electrode, the second interlayer film having a first film and a second film provided above the first film, the second film having an etching rate faster than an etching rate of the first film; (e) forming a second contact hole on the second interlayer film in the first contact hole; (f) removing at least a part of the second film on the second contact hole and on the first electrode; (g) forming a second conductive film on the first layer of the second interlayer film and in the second contact hole; and (h) forming a second electrode by patterning the second conductive film on the second contact hole, wherein the step (a) includes preparing the substrate having the electrode of the thin film transistor in a pixel forming region and a wiring in a peripheral region outside of the pixel forming region, the step (b) includes forming the first interlayer film on the electrode in the pixel forming region and on the peripheral region, the step (c) includes removing at least a part of the first interlayer film in a first region of the pixel forming region and a part of the wiring forming region, the step (d) includes forming the second interlayer film in the first region, and the step (f) includes removing at least a part of the second film on the second interlayer film in the first region.