| 摘要 |
PROBLEM TO BE SOLVED: To determine the placement position, shape and area of blocks more easily for chip level optimization in floor plan design by a virtual flat placement technique having a black box block. SOLUTION: A preset black box block is provided with a flexible shape and area, so that the shape and area of the black box block can reflect effects of chip level routing congestion and the like, and can further reflect effects of chip level routing congestion and the like because the shape and area of the preset black box block lightly affects blocks other than the black box. Block shapes can thus be determined more easily for chip level optimization to shorten the design period of a semiconductor integrated circuit. COPYRIGHT: (C)2007,JPO&INPIT
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