Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Combined with field effect transistor
Patent
1996-07-10
1998-03-17
Saadat, Mahshid D.
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Combined with field effect transistor
257133, 257135, 257140, 257378, H01L 2974, H01L 31111
Patent
active
057290318
ABSTRACT:
A p type collector region is formed at the side of collector surface of an n.sup.- region with an n type buffer region. This p type collector region has a structure including a p type impurity region and a p.sup.+ impurity region. Impurity concentrations of the p type impurity region, the p.sup.30 impurity region and the n type buffer region are of a prescribed relationship, and the diffusion depth of the p type impurity region from the collector surface is not lower than 2.0 .mu.m. Thus, a semiconductor device in which turn-off loss is sufficiently low and which is not likely to be affected by thermal treatment upon formation of each of the impurity V regions can be obtained.
REFERENCES:
patent: 5162876 (1992-11-01), Kitagawa et al.
patent: 5200632 (1993-04-01), Sakurai
patent: 5331184 (1994-07-01), Kuwahara
patent: 5379089 (1995-01-01), Uenishi et al.
patent: 5396087 (1995-03-01), Baliga
patent: 5397905 (1995-03-01), Otsuki et al.
Mitsubishi Denki & Kabushiki Kaisha
Saadat Mahshid D.
Wilson Allan R.
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