Thin film transistors for a display device each include a semiconductor layer made of polysilicon having a channel region, drain and source regions at both sides of the channel region and doped with impurity of high concentration, and an LDD region arranged either between the drain region and the channel...http://www.google.de/patents/US6624443?utm_source=gb-gplus-sharePatent US6624443 - Display device with an improved contact hole arrangement for contacting a semiconductor layer through an insulation film
