| 摘要 |
PURPOSE: To enable checking the sections of drill holes of the respective products, on printed wiring boards. CONSTITUTION: On a printed wiring board wherein a wiring pattern is formed on at least one side surface, and holes for mounting electronic components or the like are opened with a drill, a dummy part 2 for making each of the holes which are a new drill quality check hole 5 for checking the quality of a new drill and a used drill quality check hole 4 for checking the quality of a drill which reaches the previously set number of times of drill hit is formed outside the product size of a×b.
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