| 摘要 |
PURPOSE:To perform a pattern design which is required when a circuit design is changed, in a short time, by performing the layout design only on parts related to the design change and using old data as pattern design data as it is. CONSTITUTION:When a circuit design 1 is completed, a design information file 2 is formed based on the design and the contents of the design information file are read as data, and then, a layout design 3 which determines the arrangement and connecting pattern of each circuit element is performed by a computer. When the layout design is completed, the information is stored in a pattern design file 4. The data in the pattern design file directly corresponds to an actually manufactured printed substrate, and, when a different printed substrate is to be manufactured, different data is prepared. |
