Capacitor for an integrated circuit

Details Capacitor for an integrated circuit Capacitor for an integrated circuit

1990-08-24

1992-06-02

Griffin, Donald

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

357 51, H01G 406, H01L 2702

Patent

active

051192675

ABSTRACT:
A capacitor having a semiconductor substrate with a diffusion layer disposed in a portion of the semiconductor substrate and a first insulation layer disposed on the semiconductor substrate and the diffusion layer, the capacitor capable of providing a capacitance stably for an integrated circuit includes a first metallic layer disposed on the diffusion layer for conducting an electric current therethrough with the first insulation layer between the semiconductor substrate, a second insulation layer disposed on the first metallic layer for insulating the first metallic layer, and a second metallic layer disposed on the second insulation layer for conducting an electric current therethrough, the capacitance being expressed by C with a relation of C=C.sub.M +C.sub.B, the C.sub.M representing a capacitance occurred between the first metallic layer and the second metallic layer, the C.sub.B representing a capacitance occurred between the first metallic layer and the semiconductor substrate, respectively. The capacitor includes a third metallic layer which is disposed on the diffusion layer for conducting an electric current therethrough, and a third insulation layer which is disposed on the second metallic layer for protecting the integrated circuit. The capacitor also includes a mold resin which is disposed on the third insulation layer for sealing the capacitor.

REFERENCES:
patent: 3496435 (1970-02-01), Manley
patent: 4914546 (1990-04-01), Alter
Patent Abstracts of Japan, vol. 7, No. 186 (E-193)(1331) 16 Aug. 1983, & JP-A-58 90755 (Nippon Denki) 30 May 1983.
Patent Abstracts of Japan, vol. 6, No. 16 (E-92)(894) 29 Jan. 1982, & JP-A-56 138946 (Tokyo Shibaura Denki) 29 Oct. 1981.

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