| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board of multiple unit boards in which a dimensional accuracy of a base board can be simply evaluated and individual unit boards can be cut with high dimensional accuracy. SOLUTION: The circuit board of multiple unit boards comprises a plurality of circuit board regions 2 having wiring conductors each made of a conductor layer in its interior and on a surface thereof and aligned laterally and longitudinally and integrally arrayed and formed, and a waste margin region 3 surrounding the plurality of the regions 2 on an outer periphery of a substantially square flat plate-shape base board 1 in which a plurality of insulating layers and conductor layers of organic materials are laminated at a central part of the board 1. A lattice-like pattern 4a made of the conductor layers disposed in parallel with the alignment of the regions 2 at lateral and longitudinal intervals of 50 to 200μm are provided and covered in ranges of a width and a length of 0.5 to 2.5 mm on a dimensional measuring region 4, on for corners of the region 3 and through holes smaller than a diameter at an interval are formed on the region 4. COPYRIGHT: (C)2003,JPO |
