Semiconductor device and method of making the same

Details Semiconductor device and method of making the same Semiconductor device and method of making the same

1979-04-06

1981-04-07

Wojciechowicz, Edward J.

Metal treatment

Stock

Ferrous

357 45, 357 48, 148105, H01L 2972

Patent

active

042609992

ABSTRACT:
A semiconductor device and a method of manufacturing the same, wherein there are provided, on a semiconductor substrate of a first conductivity type, a first and a second epitaxial layer each having a second conductivity type opposite to the first conductivity type. A plurality of regions are defined in the entire area of the epitaxial layer by being isolated by means of an isolation layer of the first conductivity type which extends from the surface of the second epitaxial layer to the semiconductor substrate. Furthermore, a first buried layer of the second conductivity type is formed in each of the isolated regions in such a manner as to extend in the first epitaxial layer and semiconductor substrate so that a transistor can be formed on each first buried layer.

REFERENCES:
patent: 4038680 (1977-07-01), Yagi et al.
patent: 4054899 (1977-10-01), Stehlin et al.

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