Patent ID: 8717510

Claim:
A liquid crystal display device comprising: a TFT substrate having pixels, each pixel having a pixel electrode and a TFT formed thereon; a counter substrate; and liquid crystals put between the TFT substrate and the counter substrate; wherein the TFT includes a semiconductor layer; a first n + -a-Si layer formed on the semiconductor layer; a second n + -a-Si layer formed on the first n + -a-Si layer; and a drain electrode and a source electrode formed over the second n + -a-Si layer, wherein the semiconductor layer has a first lower surface which faces the TFT substrate, a first upper surface opposite to the first lower surface, and a first side portion between the first lower surface and the first upper surface, the first n + -a-Si layer has a second lower surface which is physical contact with the first upper surface, a second upper surface opposite to the second lower surface, and a second side portion between the second lower surface and the second upper surface, the first side portion of the semiconductor layer is not in physical contact with the first n + -a-Si layer, and the second n + -a-Si is in physical contact with the second upper surface of the first n + -a-Si layer, the first side portion of the semiconductor layer, and the second side portion of the first n + -a-Si layer.