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Document Number
US Patent 3753802
Issued Date
August 21, 1973
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Inventors
Tummers; Leonard Johan (Emmasingel, Eindhoven,NL)
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Abstract
A method of making a transistor by forming a layer of high resistivity on a semiconductor collector body, diffusing a base zone into the layer to a depth less than the thickness of the layer and then forming an emitter zone in the base zone.
Drawing
TRANSISTOR - US Patent 3753802 Drawing
Drawing from US Patent 3753802
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Number of Claims:
4
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Owner
Published
August 21, 1973
Application Number
04/349,709
Filed
March 5, 1964
US Classification
438/309   257/E21.087 257/E21.092 257/E21.106 257/E29.185 438/312 438/508
Int'l Classification
C30B   25/02   (20060101)   H01L   21/02   (20060101)   H01L   21/203   (20060101)   H01L   21/18   (20060101)   H01L   21/205   (20060101)   H01L   29/00   (20060101)   H01L   29/66   (20060101)   H01L   21/00   (20060101)   H01L   29/732   (20060101)  
Assistant Examiner
Parent Case
This application is a division of my copending application, Ser. No. 84,923, filed Jan. 25, 1961 now U.S. Pat. No. 3,217,214.
Priority Data
Jan 29, 1960 [NL] 247,902
USPTO Field of Search
148/1.5   148/1.6   148/33   148/174   148/175   317/234   317/235   29/25.3   29/25.3D   29/25.3GR   29/155.5G  
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