| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing wiring boards for firmly fixing discrete components for positioning, and for ensuring processing precision by preventing occurrence of uncut remainder of glass fiber. SOLUTION: In the method of manufacturing wiring boards, drilling is performed so that the periphery of a plurality of through-holes has an intersection, thus forming a continuous deformed through-hole with the plurality of through-holes and forming a projection at which the intersection of the periphery of the plurality of through-holes projects inside the periphery of the deformed through-hole. In the method, a lower hole is provided near the intersection of the periphery of the plurality of through-holes that lies within the periphery of the deformed through-hole and forms a projection of the deformed through-hole. COPYRIGHT: (C)2010,JPO&INPIT
|
