MIS high-voltage element with high-resistivity gate and field-pl

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357 41, 357 59, 357 231, 357 24, 357 238, H01L 2978, H01L 2904, H01L 2704, H01L 2940

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045905096

ABSTRACT:
By the use of high-ohmic polycrystalline silicon(poly) in MIS elements, a depletion layer can be formed in the poly material which brings about an electric decoupling between the poly (gate) and the underlying semiconductor body. This effect can be utilized advantageously in various circuit elements, such as in CCD's, in order to obtain a favorable potential distribution in the substrate; in MOS transistors in order to reduce the parasitic capacities; and in high-voltage devices in order to increase the breakdown voltage at the edge of the field plate (resurf).

REFERENCES:
patent: 3932882 (1976-01-01), Berger
patent: 3943545 (1976-03-01), Kim
patent: 4157557 (1979-06-01), Sato et al.
patent: 4172260 (1979-10-01), Okabe et al.
patent: 4270137 (1981-05-01), Coe
Whelan et al., "Resistive-Insulated Gate Arrays . . . " Phillips Res. Reports, vol. 30, No. 6, Dec. 1975, pp. 436-482.
Hu et al., "A Resistive-Gated IGFET Tetrode," IEEE Trans. on Electron Devices, vol. ED-18, No. 7, Jul. 1971, pp. 418-425.

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