| 摘要 |
PROBLEM TO BE SOLVED: To prevent a crack from extending and resulting in defect in product, when a plurality of printed circuit boards are cut from a panel producing the printed circuit boards all at once.SOLUTION: Each of a plurality of printed circuit boards 100 has: a product area 20 composed of a plurality of product areas 1a, 1b; and a dummy area 10 formed around one or two or more product areas 20. A plurality of independent dummy patters 11 are formed on the edge side of the outer periphery of the dummy area 10. The dummy patterns 11 are arranged in two or more lines. The dummy patterns 11 are formed such that a straight line passes through a gap part of the dummy pattern 11 but does not pass through the dummy area 10 from the edge 10a side.SELECTED DRAWING: Figure 1A |
