Semiconductor device and manufacturing method thereof
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United States of America Patent
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Apr 30, 2019
Grant Date -
Jul 5, 2018
app pub date -
Feb 27, 2018
filing date -
Oct 28, 2015
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Abstract
In a method for manufacturing a semiconductor device, a doped layer doped with a first dopant is formed in a substrate. A semiconductor layer is formed on the doped layer. A fin structure is formed by patterning at least the semiconductor layer and the doped layer such that the fin structure comprises a channel region including the semiconductor layer, and a well region including the doped layer. An isolation insulating layer is formed such that the channel region of the fin structure protrudes from the isolation insulating layer and the well region of the fin structure is embedded in the isolation insulating layer. A gate structure is formed over a part of the fin structure and the isolation insulating layer. The semiconductor layer is at least one of a doped silicon layer or a non-doped silicon layer.
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