Fishing – trapping – and vermin destroying
Patent
1988-05-26
1990-03-27
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
437173, 437929, H01L 2122, H01L 21268
Patent
active
049120654
ABSTRACT:
Disclosed is a plasma doping method capable of introducing a large quantity of impurities into a substrate at a relatively low temperature (200.degree. to 600.degree. C.). In the LSI fabrication process represented by Si process, it is necessary to introduce impurities at a properly controlled concentration into desired positions. In this plasma doping method, in order to satisfy this application, the doping temperature may be controlled around 100.degree. C. at high degree of vacuum and by ECR discharge or the like, and a process capable of using a resist mask generally used in the LSI fabrication step and controlling the concentration in a wide range is enabled, so that an extremely shallow impurity profile is realized.
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patent: 4668365 (1987-05-01), Foster et al.
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Kubota Masafumi
Mizuno Bunji
Nakayama Ichiro
Tanno Masuo
Chaudhuri Olik
Matsushita Electric - Industrial Co., Ltd.
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