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Richard L. Hansen
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St. Louis, MO, US
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last 30 patents
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Patent Grant
Methods for improving zero dislocation yield of single crystals
Patent number
5,980,629
Issue date
Nov 9, 1999
MEMC Electronic Materials, Inc.
Richard L. Hansen
C30 - CRYSTAL GROWTH
Information
Patent Grant
Surface-treated crucibles for improved zero dislocation performance
Patent number
5,976,247
Issue date
Nov 2, 1999
MEMC Electronic Materials, Inc.
Richard L. Hansen
C30 - CRYSTAL GROWTH
Information
Patent Grant
Cleaning of metallic contaminants from the surface of polycrystalli...
Patent number
5,753,567
Issue date
May 19, 1998
MEMC Electronic Materials, Inc.
Mohsen Banan
C01 - INORGANIC CHEMISTRY
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Patent Grant
Cleaning of polycrystalline silicon for charging into a Czochralski...
Patent number
5,445,679
Issue date
Aug 29, 1995
MEMC Electronic Materials, Inc.
Richard L. Hansen
C30 - CRYSTAL GROWTH