SEMICONDUCTOR DEVICE, SUBSTRATE FOR ELECTRO-OPTICAL DEVICE, ELECTRO-OPTICAL DEVICE, ELECTRONIC DEVICE, AND PROJECTION DISPLAY

摘要

The potential at a channel region of a MOSFET on a substrate needs to be stabilized to assure a drain withstand voltage. To this end, a new potential line is additionally required. However, the addition of the potential line causes a drop in the aperture ratio in a transmissive type liquid-crystal display device, in which lightness is particularly important. In the present invention, a light shielding layer overlapping the MOSFET formed on the substrate is electrically connected to the channel region in the MOSFET.