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Document Type and Number:
Japanese Patent JPH03120568
Kind Code:
U
Application Number:
JP2977990U
Publication Date:
December 11, 1991
Filing Date:
March 23, 1990
Export Citation:
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International Classes:
C30B15/00; C30B29/42; H01L21/208; (IPC1-7): C30B15/00; C30B29/42; H01L21/208
Domestic Patent References:
JPS5551876A1980-04-15
JPH01108195A1989-04-25
JPH0196086A1989-04-14
JPH0274585A1990-03-14



 
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