Patent ID: 8624256

Claim:
A display device comprising: a display region in which pixel electrodes and TFTs for pixel are formed in a matrix array; and a drive circuit which is formed in a periphery of the display region and includes a TFT for drive circuit, wherein the TFT for pixel is a bottom-gate-type TFT having a channel portion which is formed of an a-Si layer, the TFT for drive circuit is a bottom-gate-type TFT, the TFT for drive circuit is constituted by forming a channel portion using a poly-Si layer, by placing an a-Si layer on the poly-Si layer, by forming an n+Si layer on the a-Si layer, and by forming an SD electrode on the n+Si layer, a gate insulation film is formed on a gate electrode of the TFT for drive circuit, the poly-Si layer is formed on the gate insulation film and has a main surface and a side surface, the main surface faces the gate electrode of the TFT for drive circuit, the side surface intersects both the main surface and the gate insulation film and extends to contact the gate insulation film at an intersection point of the side surface and the gate insulation film, an entirety of the side surface is in contact with the a-Si layer of the TFT for drive circuit, the a-Si layer of the TFT for drive circuit covers the poly-Si layer including covering the side surface, and the poly-Si layer is not brought into contact with the SD electrode.