Invention Grant
- Patent Title: Transistor with contacted deep well region
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Application No.: US16536769Application Date: 2019-08-09
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Publication No.: US11011615B2Publication Date: 2021-05-18
- Inventor: George Imthurn
- Applicant: Silanna Asia Pte Ltd
- Applicant Address: SG Singapore
- Assignee: Silanna Asia Pte Ltd
- Current Assignee: Silanna Asia Pte Ltd
- Current Assignee Address: SG Singapore
- Agency: MLO, a professional corp.
- Main IPC: H01L29/66
- IPC: H01L29/66 ; H01L29/40 ; H01L29/78 ; H01L29/06 ; H01L29/10 ; H01L21/225 ; H01L21/283 ; H01L29/423

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.
Information query
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