| 摘要 |
PROBLEM TO BE SOLVED: To easily calculate the area occupation rate of a layout pattern through the use of a conventional design rule check function. SOLUTION: A window frame is applied to the layout pattern which is automatically generated based on function design and logic design and which is composed of plural pattern elements by the AND operation of a frame pattern where a micro space is provided between the adjacent patterns and of the layout pattern, and the pattern is divided (step 104). Then, the pattern elements are made into one graphic by the OR operation of a grid pattern which is composed of micro line width and whose grid intervals are not more than the width of the pattern elements and of the divided layout pattern (step 105). The area of the layout pattern is obtained once by an AREA operation (step 106). When the area occupation rate is not adapted to a condition, a dummy pattern is arranged (step 109) and it is fed back.
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