Patent ID: 6599820
Filing Date: 2003-07-29
Classification: H01L

Abstract:
A method of producing a semiconductor device comprising:forming a gate oxide film on a silicon substrate; ion-implanting BF2 on an entire surface of a polycrystalline silicon film after forming the polycrystalline silicon film on the gate oxide film; sequentially forming a reaction preventing film and a tungsten film on the polycrystalline silicon film; forming a gate wiring fabricated by the gate oxide film, the polycrystalline silicon film, the reaction preventing film, and the tungsten film by patterning; annealing the semiconductor device at 600Â° C. or more after ion implanting BF2 in the polycrystalline silicon film and before forming the reaction preventing film, wherein the step of annealing is conducted in a vacuum or a reactive atmosphere for fluorine.