Patent ID: 6413805
Filing Date: 2002-07-02
Classification: G09G,H01L

Abstract:
A method for producing a semiconductor device comprising the steps of:forming a semiconductor film comprising amorphous silicon over a substrate; disposing a crystallization promoting material in contact with the semiconductor film, said crystallization promoting material being capable of promoting crystallization of the semiconductor film; crystallizing the semiconductor film using the crystallization promoting material by heating at a first temperature having a range of 450 to 650Â° C.; patterning the crystallized semiconductor film into at least one semiconductor island; heating the semiconductor island in an oxidizing atmosphere at 800-1100Â° C. by furnace annealing to improve crystallinity whereby a thermal oxide layer is formed on a surface of the semiconductor island; forming a gate electrode over the semiconductor island; introducing an impurity into the semiconductor island selectively after the formation of the gate electrode; and then activating the impurity in the crystallized semiconductor film.