| 摘要 |
PROBLEM TO BE SOLVED: To efficiently manage information of a land without a user being conscious of layers, through which a via hole passes, of a printed wiring board, to facilitate designing the via hole. SOLUTION: Information on the shape and/or size of a land for surface layer and a land for inner layer provided around the via hole is stored. When generating design information of the via hole passing through a plurality of inner layers of the printed wiring board, the design information is generated by applying the stored information of the shape and/or size of the land for inner layer to the respective inner layers which the via hole passes through. COPYRIGHT: (C)2011,JPO&INPIT
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