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Semiconductor device and manufacture thereof

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专利汇可以提供Semiconductor device and manufacture thereof专利检索,专利查询,专利分析的服务。并且PURPOSE:To simplify manufacture of the semiconductor device provided with a Schottky barrier by a method wherein a guard ring secion is provided at a Schottky barrier section by performing self-alignment, and a highly integrated Schottky barrier diode is formed. CONSTITUTION:A thermal oxide film 12 is fromed on an N type silicon substrate 11 by performing thermal oxidation and an aperture 13 is provided at the expected part whereon the Schottky barrier will be formed by performing a selective etching on the film 12. Then, p type impurity boron-added polycrystalline silicon layer 14 of prescribed thickness is deposited on the film 12 including the aperture 13, a reactive ion etching is then performed on the layer 14 from the surface to the lower part, and an annular residual polycrystalline silicon layer 14' is remained at the inner circumferential part of the aperture 13. Then, boron is diffused from the layer 14' to the substrate 11 by performing heat treatment, and an annular P type guard reing layer 15 is formed on the aperture 13 by performing self-alignment. Then, after a silicide layer 16 has been formed on the surface of the layer 14' which was exposed by the heat treatment, an Al wiring 17 is formed by performing a patterning.,下面是Semiconductor device and manufacture thereof专利的具体信息内容。

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