Partially depleted (PD) semiconductor-on-insulator (SOI) field effect transistor (FET) structure with a gate-to-body tunnel current region for threshold voltage (Vt) lowering and method of forming the structure
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United States of America Patent
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Aug 19, 2014
Grant Date -
May 1, 2014
app pub date -
Jan 3, 2014
filing date -
Dec 14, 2010
priority date (Note) -
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Abstract
Disclosed are embodiments of a field effect transistor with a gate-to-body tunnel current region (GTBTCR) and a method. In one embodiment, a gate, having adjacent sections with different conductivity types, traverses the center portion of a semiconductor layer to create, within the center portion, a channel region and a GTBTCR below the adjacent sections having the different conductivity types, respectively. In another embodiment, a semiconductor layer has a center portion with a channel region and a GTBTCR. The GTBTCR comprises: a first implant region adjacent to and doped with a higher concentration of the same first conductivity type dopant as the channel region; a second implant region, having a second conductivity type, adjacent to the first implant region; and an enhanced generation and recombination region between the implant regions. A gate with the second conductivity type traverses the center portion.
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