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2186781
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Information
Patent Grant
2186781
References
Source
Patent Number
2,186,781
Date Filed
Not available
Date Issued
Tuesday, January 9, 1940
84 years ago
CPC
H01L21/161 - Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate, reduction treatment
H01L21/02565 - Oxide semiconducting materials not being Group 12/16 materials
H01L21/02614 - Transformation of metal
US Classifications
257 - Active solid-state devices
420 - Alloys or metallic compositions
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