Patent ID: 7709886
Filing Date: 2010-05-04
Classification: H01L

Abstract:
1. A TFT disposed on a substrate, comprising: a source disposed on the substrate; a first insulation pattern layer covering parts of the source and the substrate, the first insulation pattern layer comprising a covering layer and a first lateral protection wall, wherein the first lateral protection wall extends on the substrate at two sides of the source, the covering layer covers a part of the source, and the covering layer and the first lateral protection wall surround and define an opening exposing a part of the source; a gate pattern layer and a second insulation pattern layer sequentially disposed on the first insulation pattern layer, wherein the gate pattern layer and the second insulation pattern layer surround the opening and expose a part of the source; a second lateral protection wall surrounding the inside of the opening and covering an edge of the gate pattern layer, wherein a thickness of the second lateral protection wall is decreased in a direction towards a center of the opening; a channel layer disposed on the second lateral protection wall and the source in the opening; a passivation layer disposed on the channel layer and the second insulation pattern layer, wherein the passivation layer has a contact window to expose a portion of the channel layer; and a drain disposed on the exposed portion of the channel layer.