Semiconductor device and manufacturing method thereof
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United States of America Patent
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Oct 9, 2018
Grant Date -
Mar 15, 2018
app pub date -
Jul 18, 2017
filing date -
Sep 14, 2016
priority date (Note) -
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Abstract
A semiconductor device includes: a first-conductivity-type semiconductor substrate serving as a drain layer; a first-conductivity-type epitaxial layer formed on the semiconductor substrate; a first-conductivity-type source layer formed in a surface part of the epitaxial layer; two second-conductivity-type gate layers formed in the surface part of the epitaxial layer so as to sandwich the source layer; a first-conductivity-type channel forming layer formed so as to be sandwiched between the two gate layers, the first-conductivity-type channel forming layer being formed on an inner side of the source layer in the epitaxial layer; and an electrode connected to one of the drain layer, the source layer, and the gate layer. In the channel forming layer, two first-conductivity-type impurity layers each having a substantially predetermined width are formed adjacent to each other in a direction crossing a channel.
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