Patent ID: 8994889
Filing Date: 2015-03-31
Classification: G02F,H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming an oxide semiconductor layer so that a thickness of the oxide semiconductor layer is greater than or equal to 15 nm and less than or equal to 50 nm; forming a conductive layer overlapping a first portion of the oxide semiconductor layer; forming an inorganic insulating layer over and in contact with a second portion of the oxide semiconductor layer; and performing a heat treatment on the inorganic insulating layer so that oxygen in the inorganic insulating layer is supplied to the second portion of the oxide semiconductor layer, wherein the first portion of the oxide semiconductor layer comprises a first region and a second region, wherein the first region is in contact with the conductive layer, wherein the second region is not in contact with the conductive layer, and wherein a conductivity of the first region is higher than a conductivity of the second region.