Patent ID: 9196632
Filing Date: 2015-11-24
Classification: G02F,H01L

Abstract:
1. A semiconductor device comprising: a first insulating layer comprising silicon, nitrogen, and oxygen over a substrate; a second insulating layer comprising silicon, nitrogen, and oxygen over the first insulating layer; a polycrystalline semiconductor film over the second insulating layer, the polycrystalline semiconductor film including a channel forming region; a planarization layer over the polycrystalline semiconductor film, and a pixel electrode over the planarization layer, wherein the pixel electrode is electrically in contact with the polycrystalline semiconductor film, wherein a concentration ratio of nitrogen to silicon of the first insulating layer ranges from 0.3 to 1.6, and wherein a concentration of nitrogen of the first insulating layer is higher than a concentration of nitrogen of the second insulating layer.