Boots – shoes – and leggings
Patent
1975-09-22
1978-06-06
Wise, Edward J.
Boots, shoes, and leggings
364491, G06F 1520, H05K 104
Patent
active
040939901
ABSTRACT:
A method for the production of mask patterns for integrated semiconductor circuits composed of standard cells, such as gates, flip-flops, shift registers and the like, in which the cells are first grouped in a predeterminable number of cell groups in such a way that as few connections as possible extend between the groups and the space requirement of the individual groups is equal. Then, the cells forming a group are located in such a way that their wiring is possible upon as few wiring levels as possible so that the path of the connection lines is obtained and the resulting values are used for controlling an automatic drawing device for producing the mask patterns.
REFERENCES:
patent: T940020 (1975-11-01), Brechling, et al.
patent: 3603771 (1971-09-01), Isett, et al.
patent: 3617714 (1971-11-01), Kernighan, et al.
patent: 3621208 (1971-11-01), Isett, et al.
patent: 3654615 (1972-04-01), Freitag
patent: 3681782 (1972-08-01), Scanlon
patent: 3684871 (1972-08-01), Schaffner
patent: 3701112 (1972-10-01), Hagelbarger
Graphical Layout System for IC Mask Design; J. S. Zucker & A. J. Crawford; IEEE Transactions on Circuit Theory, Vol. CT14 18, No. 1, Jan. 1971, pp. 163-173.
Koller Konrad
Lauther Ulrich
Siemens Aktiengesellschaft
Wise Edward J.
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