Patent ID: 6166397
Filing Date: 2000-12-26
Classification: H01L

Abstract:
An active matrix type display device having a pixel portion and a peripheral circuit portion comprising a shift register circuit, said device comprising:at least an inverted stagger type thin film transistor formed in said pixel portion;at least a CMOS transistor formed in said peripheral circuit portion, said CMOS transistor comprising an n-type inverted stagger type thin film transistor and a p-type inverted stagger type thin film transistor;each of said inverted stagger type thin film transistor in said pixel portion and in said peripheral circuit portion comprising:a gate electrode formed on an insulating surface;a gate insulating film formed on the gate electrode;a semiconductor film formed on the gate insulating film;a source region and a drain region formed in the semiconductor film; anda channel region formed between the source region and the drain region,wherein one of said n-type and p-type inverted stagger type thin film transistor comprises an LDD region formed between said source region and said channel region or between said channel region and said drain region, andwherein said inverted stagger type thin film transistor in said pixel portion does not comprise an LDD region.