Patent ID: 6753211
Filing Date: 2004-06-22
Classification: H01L

Abstract:
An active matrix display device comprising:an active matrix circuit and a driver circuit formed over a substrate; said driver circuit including at least a first thin film transistor and a second thin film transistor; said first thin film transistor comprising: a first semiconductor layer having first source and drain regions, a pair of lightly-doped regions and a first channel forming region therebetween; and a first gate electrode adjacent to said first channel forming region with a first gate insulating layer interposed therebetween, and said second thin film transistor comprising: a second semiconductor layer having second source and drain regions and a second channel forming region therebetween; and a second gate electrode adjacent to said second channel forming region with a second gate insulating layer interposed therebetween, wherein said second channel forming region directly contacts with said second source and drain regions, wherein a pair of portions containing n-type and p-type impurities are formed adjacent to said second source and drain regions respectively, wherein an electrode is connected to at least one of said pair of portions.