Patent ID: 6670595
Filing Date: 2003-12-30
Classification: H01L

Abstract:
A photosensor system comprising:(a) a plurality of photosensors, each including: a first gate electrode, a first gate insulating film provided above said first gate electrode, source and drain electrodes provided above said first gate insulating film, a semiconductor layer provided between said source and drain electrodes, and having a carrier generating region for generating carriers by incident exciting light and a plurality of channel regions separated from each other so as to prevent an electric field between said source and drain electrodes from concentrating, first and second impurity doped layers respectively connected to the source and drain electrodes, and separated from each other such that the first and second impurity doped lavers define a channel therebetween in the semiconductor layer, and such that a distance between the first and second impurity doped layers is constant at any part of the channel for matching a length of the channel; a second gate insulating film provided above said semiconductor layer, and a second gate electrode provided above said second gate insulating film; (b) a first gate line connecting said first gate electrodes of said photosensors to each other; and (c) a second gate line connecting said second gate electrodes of said photosensors to each other and arranged apart from said first gate line in a plane between adjacent photosensors.