| 摘要 |
A semiconductor pillar which has a first conductive type and protrudes from a semiconductor substrate, is formed. A bottom diffusion layer having a second conductive type is formed in the semiconductor substrate around a bottom of the semiconductor pillar. A gate insulator film which covers a side surface of the semiconductor pillar, is formed. A gate electrode which covers the gate insulator film, is formed. A top diffusion layer having the second conductive type is formed at a top portion of the semiconductor pillar. The top diffusion layer including a semiconductor body is formed by an epitaxial growth which contains an impurity.
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