Fishing – trapping – and vermin destroying
Patent
1991-02-06
1993-09-21
Fourson, George
Fishing, trapping, and vermin destroying
437162, 437203, 437 86, H01L 2176
Patent
active
052468771
ABSTRACT:
An electrode region, which is formed in an active region in a semiconductor element forming region isolated by dielectric isolation, for example, comprises a polycrystalline semiconductor layer containing a predetermined conductivity type impurity in high concentration and a diffusion layer of the sam conductivity type formed in a periphery of the polycrystalline semiconductor layer. The polycrystalline semiconductor layer can be easily and correctly increased in impurity concentration and increased in high workability in thickness. Thus the semiconductor device having an electrode region of high concentration in desired thickness can be implemented.
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Hisamoto Yoshiaki
Yamaguchi Hiroshi
Fourson George
Mitsubishi Denki & Kabushiki Kaisha
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