slim-the translation of symbolic layouts into mask data
A new form of symbolic layout for integrated circuits is coupled with a mask compaction procedure which removes excess space while guaranteeing that all design rules are met. Tradeoffs between X and Y compaction are made based on critical path information. Two types of compaction are used to minimize mask area and computer run-time. Additional procedures reduce mask area by inserting jogs at strategic locations in the layout. A partitioned data base is used to store mask data in a hierarchical manner. The symbolic layout and mask compaction procedures require only 30 to 50 percent of the time traditionally needed to do equivalent hand layouts.
translation layout data integrated circuit compact procedure space design rules critic informal types computation timing locatability data base hierarchic