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Method of making a silicide semiconductor device with junction breakdown prevention

Image Number 3 for United States Patent #6027991.

A method of making a semiconductor device includes a semiconductor substrate, an impurity doped region formed in the semiconductor substrate, an insulating layer formed on the semiconductor substrate having an opening leading to the impurity doped region, a polycrystalline silicon layer formed on the insulating layer and the impurity doped region, and a metal silicide layer formed on the polycrystalline silicon layer. A transverse thickness of the polycrystalline silicon layer at a sidewall of the insulating layer is larger than a longitudinal thickness of the polycrystalline silicon layer at a bottom of the opening and at a surface of the insulating layer.

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