| 摘要 |
PURPOSE: To obtain a printed board in which the error is eliminated in the longitudinal and lateral directions by indicating a reference point, i.e., a mark, clearly in the processes of design, manufacture, wiring and assembling CONSTITUTION: A mark 20 of Y←→X, for example, is put on the surface of one of original printed boards 10, i.e., a printed board 100. A mark 20 of Y←→X, for example, is then put on the surface of each multi-plane printed board 100 produced from the original printed board 10. Since a reference point, i.e., a mark, is indicated clearly for the processes of design, manufacture, wiring and assembling, longitudinal and lateral directions of the printed board can be determined at a glance.
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