Patent
1983-09-02
1989-10-03
Hille, Rolf
357 42, 357 2313, H01L 2980, H01L 2978, H01L 2702
Patent
active
048720453
ABSTRACT:
An input protection device for a C-MOS device having an n-type semiconductor substrate and a p-type well region. The device comprises a diode consisting of the p-type well region and an n.sup.+ -type layer diffusion formed in the p-type well region and connected between a gate of a C-MOS FET and ground. The n.sup.+ -type layer of the diode has a higher impurity concentration and a greater diffusion depth than those of n.sup.+ -type layers formed in the p-type well region and constitute the source and drain of an n-channel MOSFET.
REFERENCES:
patent: 3667009 (1972-05-01), Rugg
"C-MOS/SOS LSI Input/Output Protection Network", (8/1978)--B. T. Ahlport et al.
"Gate Protection of MIS Devices"--M. Lenzlinger--(Apr. 1971).
Baba Isao
Kohguchi Kenji
Kondo Takeo
Yanagisawa Leiichi
Hille Rolf
Limanek Robert P.
Tokyo Shibaura Denki Kabushiki Kaisha
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