Semiconductor device and projection-type display unit

A projection-type display unit comprising:

• a first substrate;
• a TFT element provided on the first substrate with a first interlayer insulating layer interposed therebetween, the TFT element including a semiconductor layer and a gate electrode that is provided on the semiconductor layer with a gate insulating layer interposed therebetween;
• a second substrate disposed to face the first substrate;
• and
• a display layer provided between the first substrate and the second substrate, wherein
• the gate electrode includes a first electroconductive film and a second electroconductive film that has a light-shielding property in order from side of the semiconductor layer, and
• the second electroconductive film extends from a side face to a bottom face of each of a pair of openings that are provided to interpose the semiconductor layer.