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Class Information
Number: 438/921
Name: Semiconductor device manufacturing: process > Doping > Nonselective diffusion
Description: Art collection under 914 involving a random diffusion process (i.e., diffusion without a mask).

Patents under this class:

Patent Number Title Of Patent Date Issued
5571747 Method for producing a semiconductor commutator Nov. 5, 1996
5569611 Method of manufacturing a bipolar transistor operating at low temperature Oct. 29, 1996
4843034 Fabrication of interlayer conductive paths in integrated circuits Jun. 27, 1989
4168997 Method for making integrated circuit transistors with isolation and substrate connected collectors utilizing simultaneous outdiffusion to convert an epitaxial layer Sep. 25, 1979
4140559 Method of fabricating an improved substrate fed logic utilizing graded epitaxial deposition Feb. 20, 1979

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