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2158748
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Patent Grant
2158748
References
Source
Patent Number
2,158,748
Date Filed
Not available
Date Issued
Tuesday, May 16, 1939
85 years ago
CPC
H01L21/164 - Oxidation and subsequent heat treatment of the foundation plate
H01L21/02565 - Oxide semiconducting materials not being Group 12/16 materials
H01L21/02614 - Transformation of metal
H01L21/161 - Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate, reduction treatment
US Classifications
148 - Metal treatment
257 - Active solid-state devices
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