Integrated circuits

Details Integrated circuits Integrated circuits

1989-01-31

1989-12-26

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

357 51, H01L 736, H01L 2702

Patent

active

048901911

ABSTRACT:
In a semi-custom integrated circuit, e.g. a bipolar analogue array, underpass areas are so configured as to permit operation as capacitors by suitable configuration of a user determined interconnection pattern. Typically each underpass comprises a highly doped region disposed over a buried layer. A thin oxide layer is applied to the surface of the underpass. Suitable configuration of polysilicon and metal masks provides either a cross-over or a capacitor.

REFERENCES:
patent: 3547716 (1970-12-01), De Witt et al.
patent: 3764409 (1973-10-01), Nomura et al.
patent: 3860836 (1975-01-01), Pedersen
patent: 4167018 (1979-09-01), Ohba et al.
patent: 4758873 (1988-07-01), Monticelli

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