Patent ID: 6777255
Filing Date: 2004-08-17
Classification: G02F,H01L

Abstract:
A method for manufacturing an electro-optical device which comprises a pixel section and a driver circuit over a same substrate comprising:process (A) for forming a region which includes an n-type impurity element in an active layer of an n-channel TFT which forms the driver circuit in a concentration range of 2Ã—1016 to 5Ã—1019 atoms/cm3; process (B) for forming a region which includes an n-type impurity element in an active layer of an n-channel TFT which forms the driver circuit in a concentration range of 1Ã—1020 to 1Ã—1021 atoms/cm3; process (C) for forming a region which includes a p-type impurity element in an active layer of a p-channel TFT which forms the driver circuit in a concentration range of 3Ã—1020 to 3Ã—1021 atoms/cm3; process (D) for forming a region which includes an n-type impurity region in an active layer of a pixel TFT which forms the pixel section in a concentration range of 1Ã—116 to 5Ã—1018 atoms/cm3, characterized in that the process D is performed by adding an n-type impurity element by using as a mask a gate wiring that is covered by an insulating film comprising silicon.