| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-layer printed wiring board design method capable of arranging a specified wiring pattern in a surface layer by a simple means without changing the program of a central processing unit. SOLUTION: Component data required for a circuit are registered in a step S.11, the data of a surface layer wiring pattern are inputted as virtual components in a step S.12, the data of a multi-layer printed board are inputted in a step S.13 and the data of a circuit diagram are inputted in a step S.14. In a step S.15, based on information inputted in the four steps, the arrangement of components and the wiring pattern is automatically designed in the central processing unit 13b. The surface layer wiring pattern is surely arranged in the surface layer since it is handled similarly to the components. A part to be corrected is pointed out in a step S.17 until a designed result is satisfying, and the processing of the step S.15 is repeatedly executed.
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