Patent ID: 9349749
Filing Date: 2016-05-24
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: first and second gate stacks formed on a semiconductor-on-insulator (SOI) substrate, the SOI substrate including a dielectric layer interposed between a bulk substrate layer and an active semiconductor layer; first and second extension implants formed in the active semiconductor layer, the first extension implant portion disposed adjacent to the first gate stack and the second extension implant portion disposed adjacent to the second gate stack; a trench having opposing sidewalls that extend between the first and second gate stacks; conformal halo implants that extends continuously about the trench and conforms entirely to each opposing sidewall without extending beneath the first and second gate stacks, the conformal halo implants including a portion that contacts a respective extension implant without contacting the dielectric layer; a butting implant that extends through a bottom portion of the conformal halo implant and reaches the dielectric layer such that the butting implant extends between the trench and the dielectric layer; and an epitaxial layer formed at exposed source/drain regions, the butting implant interposed between the epitaxial layer and the dielectric layer.