Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Junction field effect transistor
Patent
1992-11-16
1994-04-19
Hille, Rolf
Active solid-state devices (e.g., transistors, solid-state diode
Field effect device
Junction field effect transistor
257336, 257339, 257343, 257344, H01L 2980, H01L 2976, H01L 2994, H01L 31062
Patent
active
053048270
ABSTRACT:
A transistor has a JFET gate region of a first conductivity type formed at the face of a semiconductor layer to laterally and downwardly surround a drift region of a second conductivity type. A thick insulator region is formed on a portion of the drift region at the face. A IGFET body of the first conductivity type is formed at the face to be adjacent the JFET gate region. This body spaces a source region of the second conductivity type from the drift region. A drain region is formed at the face to be of the second conductivity type and to adjoin the drift region, and to be spaced from the IGFET body. A conductive gate extends over the face between the source region and the thick insulator region, with a thin gate insulator spacing the gate from the IGFET body. The enhanced doping concentration of the JFET gate region with respect to the semiconductor layer allows the dopant concentration of the drift region to likewise be increased, thereby allowing RESURF conditions to be met at the rated voltage and with a lower r.sub.ds (on).
REFERENCES:
patent: 4394674 (1983-07-01), Sakuma
patent: 4614959 (1986-09-01), Nakagawa
patent: 4757362 (1988-07-01), Biwa et al.
patent: 4819045 (1989-04-01), Murakami
patent: 4947232 (1990-08-01), Ashida et al.
patent: 5055896 (1991-10-01), Williams et al.
"High Voltage Thin Layer Devices (Resurf Devices)", J. A. Appels and H. M. J. Vaes, IEEE, 1979, pp. 238-241.
Malhi Satwinder
Ng Wai T.
Brady Wade James
Donaldson Richard L.
Hille Rolf
Loke Steven
Texas Instruments Incorporated
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