Patent ID: 6355512
Filing Date: 2002-03-12
Classification: H01L

Abstract:
A method for producing a bottom gate type thin film transistor comprising the steps of:forming a gate electrode on an insulating surface; forming a gate insulating film on the gate electrode; forming a semiconductor active layer on the gate insulating film; selectively forming a doping mask on the semiconductor active layer; forming a metal film which covers the semiconductor active layer and the doping mask; selectively reacting the metal film with the semiconductor active layer to selectively form a silicide region in the semiconductor active layer; selectively introducing an impurity element in an oblique direction into the semiconductor active layer through the metal film to form a source region, a drain region and a channel region between the source and drain regions in the semiconductor active layer; and removing a portion of the metal film that has not reacted in the reacting step, wherein the oblique direction is an angle of 30 or more with respect to a major surface of the insulating surface.