Semiconductor integrated circuit having overlapping circuit cell

Details Semiconductor integrated circuit having overlapping circuit cell Semiconductor integrated circuit having overlapping circuit cell

1985-06-25

1987-10-20

James, Andrew J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

357 42, 357 46, 357 65, 357 68, 357 71, 307303, 307304, H01L 2710, H01L 2350

Patent

active

047017783

ABSTRACT:
The packing density of a logic LSI based on standard cell methodology is increased by partially overlapping two adjoining cells so as to have common terminal regions to be connected to the wirings for supplying power. To this end, the pattern of the terminal region at a side edge of the cells in the row direction is standardized in its shape, size and position in each cell. The cells are registered in the cell library of a CAD system, together with a newly introduced additional symbol to indicate the region which may be overlapped during chip design operation using a display.

REFERENCES:
patent: 3943551 (1976-03-01), Skorrup
patent: 4125854 (1978-11-01), McKenny et al.
patent: 4161662 (1979-07-01), Malcolm et al.
patent: 4240097 (1980-12-01), Raymond, Jr.
patent: 4566022 (1986-01-01), Kalter et al.
Computer Design, vol. 23, No. 3, 3/84, pp. 159-169, Winchester Mass. U.S., J. Bond "Semicustom Circuits Arrive".

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