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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS4934779
Kind Code:
A
Application Number:
JP7706172A
Publication Date:
March 30, 1974
Filing Date:
July 31, 1972
Export Citation:
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International Classes:
H01L21/8222; H01L21/331; H01L27/06; H01L29/73



 
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