1990-04-20
1991-06-25
Hille, Rolf
357 49, 357 50, 357 51, 357 86, H01L 2704, H01L 2712, H01L 2702
Patent
active
050271830
ABSTRACT:
Individual stages of a multistage electronic receiver include a pair of conductive isolation regions around each stage to isolate each stage from the other stages and thereby prevent feedback and external noise problems. Each pair of isolation regions includes a P+ ring and an N+ ring adjacent to each other to shunt hole carriers and electron carriers, respectively. Removal of the carriers does not have to wait for recombination of the carriers. The region which has the same conductivity type as the substrate extends entirely through an epitaxial or diffused layer to the substrate to collect hole carriers in the substrate.
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Hille Rolf
International Business Machines
Saadat Mahshid
Samodovitz Arthur J.
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