Transistor with contacted deep well region
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United States of America Patent
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Oct 3, 2017
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N/A
app pub date -
Jun 3, 2015
filing date -
Jun 3, 2015
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Abstract
Various methods and devices that involve body contacted transistors are disclosed. An exemplary method comprises forming a gate on a planar surface of a semiconductor wafer. The gate covers a channel of a first conductivity type that is opposite to a second conductivity type. The method also comprises implanting a body dose of dopants on a source side of the gate using the gate to mask the body dose of dopants. The body dose of dopants spreads underneath the channel to form a deep well. The body dose of dopants has the first conductivity type. The method also comprises implanting, subsequent to implanting the body dose of dopants, a source dose of dopants on the source side of the gate to form a source. The method also comprises forming a source contact that is in contact with the deep well at the planar surface of the semiconductor wafer.
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