At present, both integrated circuit computer-aided design (IC-CAD) technology and integrated circuit computer-aided manufacturing technology in our country are inferior to that of advanced country.

如果说目前我国集成电路的计算机辅助设计技术同世界先进国家相比存在着多年差距，那么，在制造方面的计算机辅助也同样存在很大的差距。

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There exist many design techniques for ASICs, which are based on advanced design tools and extensive bases for IC CAD.

专用集成电路的设计目前有很多方法，但都基于有先进的设计工具和较为丰富的集成电路CAD库。

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VHDL silicon compiler is a supplementary tool of the IC CAD system-XUECAD. The algorithms of modified VHDL silicon compilers placing and routing are introduced in this paper.

VHDL硅编译器是XUECAD集成电路自动设计系统的一个辅助工具。本文将着重介绍改进后的VHDL硅编译器的布局、布线算法。

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