Method for designing low profile variable width input/output cel

Details Method for designing low profile variable width input/output cel Method for designing low profile variable width input/output cel

1994-09-16

1996-09-03

Thomas, Tom

Fishing, trapping, and vermin destroying

H01L 2170

Patent

active

055523331

ABSTRACT:
An apparatus and method of (input/output) I/O design, utilizing a predetermined relationship, whereby the outer ring area of an integrated circuit die are set aside for the I/O circuits which are contained in I/O cells. The height of the I/O cell is first reduced from the prior art cell heights, and the width of the cell is then varied according to the particular need of the circuit. When the drive strength of the I/O circuit is high, and the circuit is more complicated, a wider cell is assigned. Conversely, for a circuit that is relatively simple, a narrower cell will be assigned. Each I/O cell has one associated bonding pad which is placed directly below the starting point of that cell. The height of the cells may also be varied on each side of the chip in order to be able to place more I/O cells along one or more sides or edges of the chip.

REFERENCES:
patent: 3968478 (1976-07-01), Mensch
patent: 4431928 (1984-02-01), Skokan
patent: 4600995 (1986-07-01), Kinoshita
patent: 4864381 (1989-09-01), Seefeldt et al.
patent: 4910680 (1990-03-01), Hiwatashi
patent: 4947233 (1990-08-01), Aso
patent: 4975758 (1990-12-01), Crafts
patent: 4978633 (1990-12-01), Seefeldt et al.
patent: 4987578 (1991-01-01), Akins et al.
patent: 4988636 (1991-01-01), Masleid et al.
patent: 5045913 (1991-09-01), Masleid et al.
patent: 5300796 (1994-04-01), Shintani
patent: 5422441 (1995-06-01), Iruka
SGS-Thomson Microelectrics, "ISB35000 Series, HCMOS Structured Arrray,"(JAN. 1994).

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