Invention Grant
- Patent Title: Method of treating silicon wafers to have intrinsic gettering and gate oxide integrity yield
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Application No.: US16407266Application Date: 2019-05-09
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Publication No.: US10707093B2Publication Date: 2020-07-07
- Inventor: Young Jung Lee , Jae-Woo Ryu , Byung Chun Kim , Robert J. Falster , Soon Sung Park , Tae Hoon Kim , Jun Hwan Ji , Carissima Marie Hudson
- Applicant: SunEdison Semiconductor Limited (UEN201334164H)
- Applicant Address: SG Singapore
- Assignee: SunEdison Semiconductor Limited (UEN201334164H)
- Current Assignee: SunEdison Semiconductor Limited (UEN201334164H)
- Current Assignee Address: SG Singapore
- Agency: Armstrong Teasdale LLP
- Main IPC: H01L21/322
- IPC: H01L21/322 ; H01L29/36 ; H01L21/324 ; C30B29/06 ; C30B33/00 ; C30B33/02 ; C30B33/08 ; H01L21/00 ; H01L21/3065 ; H01L21/304 ; H01L21/306

Abstract:
The disclosure is directed to a method to recover the gate oxide integrity yield of a silicon wafer after rapid thermal anneal in an ambient atmosphere comprising a nitrogen containing gas, such as NH3 or N2. Generally, rapid thermal anneals in an ambient atmosphere comprising a nitrogen containing gas, such as NH3 or N2 to thereby imprint an oxygen precipitate profile can degrade the GOI yield of a silicon wafer by exposing as-grown crystal defects (oxygen precipitate) and vacancies generated by the silicon nitride film. The present invention restores GOI yield by stripping the silicon nitride layer, which is followed by wafer oxidation, which is followed by stripping the silicon oxide layer.
Public/Granted literature
- US20190267251A1 METHOD OF TREATING SILICON WAFERS TO HAVE INTRINSIC GETTERING AND GATE OXIDE INTEGRITY YIELD Public/Granted day:2019-08-29
Information query
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