Patent ID: 6579736
Filing Date: 2003-06-17
Classification: G02F,H01L

Abstract:
A method of manufacturing a semiconductor device comprising a pixel portion and a driver circuit for driving said pixel portion formed over a same substrate, said method comprising:selectively doping an n-type impurity element at a concentration from 2Ã—1016 to 5Ã—1019 atoms/cm3 in semiconductor layers of first and second n-channel type thin film transistors of said driver circuit; selectively doping a p-type impurity element at a concentration from 3Ã—1020 to 3Ã—1021 atoms/cm3 in a semiconductor layer of a p-channel type thin film transistor of said driver circuit; selectively doping an n-type impurity element at a concentration from 1Ã—1020 to 1Ã—1021 atoms/cm3 in said semiconductor layers of said first and second n-channel type thin film transistors of said driver circuit and in a semiconductor layer of an n-channel type thin film transistor of said pixel portion; and selectively doping an n-type impurity element at a concentration from 1Ã—1016 to 5Ã—1018 atoms/cm3 in said semiconductor layer of said n-channel type thin film transistor of said pixel portion through an insulating film covering at least a side surface of a gate electrode of said n-channel type thin film transistor.