Patent
1978-03-09
1980-09-30
Munson, Gene M.
357 20, 357 34, 357 38, 357 86, H01L 2990, H01L 2906, H01L 2972, H01L 2974
Patent
active
042258740
ABSTRACT:
A semiconductor transistor device comprises a base region having a relatively thin portion with a thicker portion peripherally surrounding the relatively thin portion. A PN junction is between the base region and a collector region and includes at least one radius of curvature having the lowest breakdown voltage of the PN junction. An emitter region is in the thicker portion of the base region and an emitter electrode overlies the relatively thin portion.
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Cohen Donald S.
Morris Birgit E.
Munson Gene M.
Ochis Robert
RCA Corporation
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