Bipolartransistor, Halbleitereinrichtung mit einem Bipolartransistor und Verfahren zum Herstellen derselben

An n-type epitaxial layer is formed on a main surface of a p-type silicon substrate. An n-type buried diffusion layer is formed extending in both the p-type silicon substrate and the n-type epitaxial layer. An n-type diffusion layer is formed in the surface of the n-type epitaxial layer, which is di...

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description An n-type epitaxial layer is formed on a main surface of a p-type silicon substrate. An n-type buried diffusion layer is formed extending in both the p-type silicon substrate and the n-type epitaxial layer. An n-type diffusion layer is formed in the surface of the n-type epitaxial layer, which is disposed above the n-type buried diffusion layer. A p-type diffusion layer is formed so as to surround side ends of the n-type diffusion layer. A p-type buried diffusion layer is formed so as to have a bottom face within the n-type buried diffusion layer and have side ends thereof inside side ends of the p-type diffusion layer. A collector region of a vertical pnp bipolar transistor consists of the p-type buried diffusion layer and the p-type diffusion layer. A p-type diffusion layer, which serves as an emitter region of the pnp bipolar transistor, is formed in the surface of the n-type diffusion layer. Thus, a semiconductor device having a vertical pnp bipolar transistor can be obtained which is capable of reducing its manufacturing cost and improving its reliability.
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An n-type buried diffusion layer is formed extending in both the p-type silicon substrate and the n-type epitaxial layer. An n-type diffusion layer is formed in the surface of the n-type epitaxial layer, which is disposed above the n-type buried diffusion layer. A p-type diffusion layer is formed so as to surround side ends of the n-type diffusion layer. A p-type buried diffusion layer is formed so as to have a bottom face within the n-type buried diffusion layer and have side ends thereof inside side ends of the p-type diffusion layer. A collector region of a vertical pnp bipolar transistor consists of the p-type buried diffusion layer and the p-type diffusion layer. A p-type diffusion layer, which serves as an emitter region of the pnp bipolar transistor, is formed in the surface of the n-type diffusion layer. 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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
title Bipolartransistor, Halbleitereinrichtung mit einem Bipolartransistor und Verfahren zum Herstellen derselben
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