| 摘要 |
PROBLEM TO BE SOLVED: To reduce processing manhours due to crosstalk occurrence, to suppress area increase and power consumption increase and to reduce a product defect incidence rate. SOLUTION: A parallel wire length of wires adjacent to each other is extracted by using an layout and a reference value describing a limit value of the parallel wire length as inputs (S1600). Path tracing is executed by using a net list and a clock source point as inputs and clock nets are extracted (S500). The parallel wire length is extracted in the parallel wire length extraction procedure by using gradient information describing a signal waveform gradient at a cell output terminal described in the net list as an input and the clock nets are classified into the side where either of the clock net and its adjacent wire receives the influence of the crosstalk and the side where either of them provides the influence of the cross talk based on the value of the signal waveform gradient at the cell output terminal; and whether the net is located on the side where either of them receives the influence is determined (S501). COPYRIGHT: (C)2007,JPO&INPIT
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