Fishing – trapping – and vermin destroying
Patent
1989-02-21
1989-12-19
Hearn, Brian E.
Fishing, trapping, and vermin destroying
437189, 437195, H01L 2170
Patent
active
048882992
ABSTRACT:
Interconnections interconnecting terminals to be connected by routings are dissolved into two-terminal interconnections and it is determined to which kind of terminals the terminals of each two-terminal interconnection belong, among connected diffusion layer, separated diffusion layer and gate. The interconnections are classified into groups by the combination of the kind of two terminals for each interconnection. The respective groups of interconnections are routed in the channel on the field effect transistor row according to a predetermined order of groups.
REFERENCES:
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patent: 4577276 (1986-03-01), Dunlop et al.
patent: 4615011 (1986-09-01), Linsker
patent: 4636965 (1987-01-01), Smith et al.
patent: 4691434 (1987-09-01), Perciual et al.
patent: 4745084 (1988-05-01), Rowsow et al.
Y. Shiraishi, et al., "A Permeation Router", IEEE Trans. CAD for ICAS CAD-6, No. 3, 1987, pp. 462-471.
Naka Ichiro
Ono Kunio
Sakemi Junya
Shiraishi Yoichi
Hearn Brian E.
Hitachi , Ltd.
Hitachi VLSI Engineering Corporation
Thomas T.
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