Patent ID: 9274368
Filing Date: 2016-03-01
CPC Classification: G02F,H01L

Claim Text:
1. A method for fabricating a COA substrate, comprising: forming a TFT on a base substrate; forming a pattern of a color film layer on the base substrate having the TFT formed thereon; forming a pattern which comprises a color film via hole on the color film layer through a patterning process, the patterning process comprising an ashing process; forming a pattern comprising a pixel electrode on the base substrate, the pixel electrode being electrically connected to a drain electrode of the TFT by way of the color film via hole, wherein before forming the pattern comprising the color film via hole on the color film layer through a patterning process, the method further comprises: forming a transparent protection layer on the color film layer, wherein forming the pattern comprising the color film via hole on the color film layer through a patterning process comprises: applying a photoresist on the transparent protection layer, exposing and developing the photoresist to form a photoresist-retained-region and a photoresist-removed region, the photoresist-removed region comprises a region of the color film via hole: etching the transparent protection layer in the photoresist-removed region to form a pattern comprising a protection layer via hole, locations of the protection layer via hole and the color film via hole correspond to each other; removing the color film layer in the photoresist-removed region by using an ashing process to form the pattern comprising the color film via hole.