| 摘要 |
PURPOSE:To prevent an electromagnetic wave noise due to a high frequency current which flows through a wiring pattern from being generated by rounding a belt curve part of 90 deg., etc. CONSTITUTION:A group of printed wiring patterns designed by an automatic wiring processor is searched for a corner part which is bent by 90 deg.. Once a 90 deg. bend is detected at a point P2 of one wiring pattern P, a rounding process which uses an arc A0, a rounding process which uses an arc B0, and a rounding process which uses an arc C0 are performed in order while the radius of the circle used for the rounding processes is increased from a certain value by unit length at each time until the distance of an arc pattern to other wiring patterns or a land D becomes less than a permissible value LM. When the permissible value LM is not satisfied at the point of time of the arc C0, the rounding process which uses the last arc B0 is employed finally and a wiring pattern after the rounding process including the descriptions of a segment P0-B2, the arc B0 (having a center B1 and contacts B2 and B3), and a segment B3-P1 is outputted. |
