Metal working – Plural diverse manufacturing apparatus including means for... – Common reciprocating support for spaced tools
Patent
1980-11-19
1983-02-08
Ozaki, G.
Metal working
Plural diverse manufacturing apparatus including means for...
Common reciprocating support for spaced tools
29576B, 29576W, 29580, 148175, 148187, 357 34, H01L 2126
Patent
active
043720307
ABSTRACT:
A method for producing a semiconductor device comprises the steps of selectively etching a part of a second conductivity type semiconductor layer formed on a first conductivity type semiconductor substrate where an isolating oxide layer is to be formed; introducing a first conductivity type impurity into a substrate contact forming part extending from the bottom of said etched part, by way of the side surface thereof, to the top surface of said second conductivity type semiconductor layer to form a substrate contact; thermally oxidizing said etched part to form an isolating oxide layer and forming a semiconductor element in said second conductivity type semiconductor layer.
REFERENCES:
patent: 3911471 (1975-10-01), Kooi et al.
patent: 3928091 (1975-12-01), Tachi et al.
patent: 3961356 (1976-06-01), Kooi
patent: 3992232 (1976-11-01), Kaiji et al.
patent: 3993513 (1976-11-01), O'Brien
patent: 4140558 (1979-02-01), Murphy et al.
patent: 4283236 (1981-08-01), Sirsi
Neues Aus Der Tecknik, Dec. 1, 1976, p. 1.
European Search Report, dated Dec. 17, 1981, in application No. EP80 107029.
Ozaki G.
Vlsi Technology Research Association
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