Patent ID: 9698184
Date: 2017-07-04
CPC Classifications: H01L,H04N

Claim:
1. An image sensor, comprising: a photodiode, a first thin film transistor (TFT), and a second TFT provided at each pixel, wherein: one of terminals of the photodiode is connected to a gate terminal of the first TFT and a source terminal of the second TFT, and other terminal is connected to a first control signal line, a drain terminal of the first TFT is connected to a first power source line, and a source terminal of the first TFT is connected to an output signal line, a gate terminal of the second TFT is connected to a second control signal line, and a drain terminal of the second TFT is connected to a second power source line, the first TFT and the second TFT are formed with an inverted staggered structure, a top contact structure, or a bottom contact structure, in the first TFT, a two-dimensionally overlapping area of a source electrode and a gate electrode is smaller than a two-dimensionally overlapping area of a drain electrode and the gate electrode, the first TFT includes a curve part in a first border line between a drain region connected to the first power source line via the drain terminal and a channel region and in a second border line between a source region connected to the output signal line via the source terminal and the channel region, and a length of the first border line is longer than a length of the second border line.