Patent ID: 9461077
Filing Date: 2016-10-04
CPC Classification: G02F,H01L

Claim Text:
1. A method for manufacturing an active matrix substrate that comprises a thin film transistor, a gate wire connected to a gate electrode of said thin film transistor, a pixel electrode connected to a drain electrode of said thin film transistor, and a counter electrode disposed opposite to said pixel electrode, said method comprising the steps of: (a) forming a first laminated film including a semiconductor film, a first insulating film, a first conductive film, and a second conductive film laminated in the stated order on a substrate; (b) photolithographically forming a first photoresist pattern having a first photoresist portion, a second photoresist portion, and a third photoresist portion on said first laminated film, said first photoresist portion covering a region for forming a semiconductor channel film of said thin film transistor, said second photoresist portion covering a region for forming a first electrode serving as one of said pixel electrode and said counter electrode and being thicker than said first photoresist portion, said third photoresist portion covering regions for forming said gate electrode and said gate wire being thicker than said second photoresist portion; (c) patterning said semiconductor film, said first insulating film, said first conductive film, and said second conductive film with said first photoresist pattern as a mask; (d) reducing a thickness of said first photoresist pattern to remove said first photoresist portion after said step (c) and patterning said first conductive film and said second conductive film with said first photoresist pattern as a mask, said first photoresist pattern having said second photoresist portion and said third photoresist portion that remain; and (e) further reducing a thickness of said first photoresist pattern to remove said second photoresist portion after said step (d) and patterning said second conductive film with said first photoresist pattern as a mask, said first photoresist pattern having said third photoresist portion that remains.