A p channel TFT of a driving circuit has a single drain structure and its n channel TFT, an LDD structure. A pixel TFT has LDD structure. A pixel electrode disposed in a pixel unit is connected to the pixel TFT through a hole bored in at least a protective insulation film formed of an inorganic insulating...http://www.google.de/patents/US6777254?utm_source=gb-gplus-sharePatent US6777254 - Semiconductor device and fabrication method thereof
