| 摘要 |
To provide a semiconductor device that does not cause a defect at an intersection of wirings even when a surge voltage enters from a signal input terminal, an electro-optic device provided with the semiconductor device as a TFT array substrate, and an electronic instrument. In a TFT array substrate 10 of a liquid crystal device, a signal input terminal 670, and terminals 710, 720 are arranged along a substrate side 111, and a signal input line 67 extends from the signal input terminal 670 to a substrate side 112. Of constant potential lines that supply constant potentials to an electrostatic protection circuit 5 for the signal input line 67, a low potential line 72 does not at all intersect the signal input line 67, and a high potential line 71, though intersecting the signal input line 67, does not intersect a wiring portion 671 from the signal input terminal 670 to the electrostatic protection circuit 5.
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