Invention Grant
- Patent Title: Methods for post-epitaxial warp prediction and control
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Application No.: US14758080Application Date: 2012-12-28
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Publication No.: US09601395B2Publication Date: 2017-03-21
- Inventor: Sumeet S. Bhagavat , Roland R. Vandamme
- 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
- International Application: PCT/US2012/071999 WO 20121228
- International Announcement: WO2014/105044 WO 20140703
- Main IPC: B24B49/03
- IPC: B24B49/03 ; B24B7/22 ; H01L21/66

Abstract:
In one aspect, a method of predicting warp in a plurality of wafers after an epitaxial layer deposition process is provided. The method includes receiving, by a processor, a measured resistivity of a first wafer of the plurality of wafers, receiving, by the processor, a measured shape of the first wafer after at least one of a grinding process and an etching process, and calculating, using the processor, a change in wafer shape during the epitaxial layer deposition process. The method further includes superposing, using the processor, the calculated shape change onto the measured shape of the first wafer to determine a post-epitaxial wafer shape and calculating, using the processor, a post-epitaxial warp value based on the determined post-epitaxial wafer shape.
Public/Granted literature
- US20150371909A1 METHODS FOR POST-EPITAXIAL WARP PREDICTION AND CONTROL Public/Granted day:2015-12-24
Information query
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