Invention Application
- Patent Title: MODIFICATION TO ROUGH POLYSILICON USING ION IMPLANTATION AND SILICIDE
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Application No.: US17584698Application Date: 2022-01-26
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Publication No.: US20220144628A1Publication Date: 2022-05-12
- Inventor: Alan Cuthbertson , Daesung Lee
- Applicant: INVENSENSE, INC.
- Applicant Address: US CA San Jose
- Assignee: INVENSENSE, INC.
- Current Assignee: INVENSENSE, INC.
- Current Assignee Address: US CA San Jose
- Main IPC: B81C1/00
- IPC: B81C1/00 ; B81B3/00

Abstract:
A modification to rough polysilicon using ion implantation and silicide is provided herein. A method can comprise depositing a hard mask on a single crystal silicon, patterning the hard mask, and depositing metal on the single crystal silicon. The method also can comprise forming silicide based on causing the metal to react with exposed silicon of the single crystal silicon. Further, the method can comprise removing unreacted metal and stripping the hard mask from the single crystal silicon. Another method can comprise forming a MEMS layer based on fusion bonding a handle MEMS with a device layer. The method also can comprise implanting rough polysilicon on the device layer. Implanting the rough polysilicon can comprise performing ion implantation of the rough polysilicon. Further, the method can comprise performing high temperature annealing. The high temperature can comprise a temperature in a range between around 700 and 1100 degrees Celsius.
Public/Granted literature
- US11952267B2 Modification to rough polysilicon using ion implantation and silicide Public/Granted day:2024-04-09
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