Method and apparatus for forming layout pattern of semiconductor

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364490, 364489, 364488, G06F 1560

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052474569

ABSTRACT:
A method and an apparatus is provided for forming a layout pattern of a semiconductor integrated circuit comprising automatically reforming a layout pattern by only carrying out a routing process, when a required layout pattern is the same as an existing layout pattern at the transistor-constitution level. Further, a method or an apparatus is provided for forming a layout pattern of a semiconductor integrated circuit comprising automatically reforming a layout pattern without analyzing the logical information down to the transistor-constitution level, when a required layout pattern is not the same as an existing layout pattern in the transistor-constitution level. Therefore, processing can be simplified and operation speed can be increased.

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Proceedings of the IEE 1985 Custom Integrated Circuits Conf. Portland, Oreg., May 20-23, 1985, pp. 267-271, IEEE N.Y. K. Nagao et al.: "Super integration".
European Search Report dated Mar. 27, 1991.

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