Integrated circuits

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357 36, 357 42, 357 43, 357 89, H01L 2972

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046426671

ABSTRACT:
A bipolar lateral transistor is formed in a highly doped p.sup.- -type well (13) the base contained in a lightly doped n.sup.- -type well (12) the collector in a very lightly doped p.sup.-- -type substrate (11). The arrangement is such that the boundary of the collector/base depletion region is distributed so that the non-depleted base region is wide below the emitter but very narrow at the surface. This defines a narrow active base region in the lateral emitter-collector path thus ensuring that the transistor operates predominantly in its lateral rather than its vertical mode. The structure is compatible with conventional CMOS and NMOS processing techniques.

REFERENCES:
patent: 3391035 (1968-07-01), MacKintosh
patent: 4292642 (1981-09-01), Appels et al.
Castrucci et al., "Bipolar/FET High-Performance Circuit," IBM Tech. Discl. Bull., vol. 16, No. 8, Jan. 1974, pp. 2719-2720.

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