Patent ID: 7923312
Filing Date: 2011-04-12
Classification: H01L

Abstract:
1. A fabricating method of a thing film transistor (TFT) comprising: providing a substrate; forming a source on the substrate; forming a first insulation pattern layer to cover 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 together form an opening, the first lateral protection wall surround and expose a part of the source; sequentially forming a gate pattern layer and a second insulation pattern layer on the first insulation pattern, wherein the gate pattern layer and the second insulation pattern layer surround the opening, forming a second lateral protection wall on an edge of the gate pattern layer in the opening, wherein a thickness of the second lateral protection wall is decreased toward the center of the opening, forming a channel layer in the opening, wherein the channel layer covers the second lateral protection wall and the source; forming a passivation layer 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 forming a drain on the exposed portion of the channel layer.