MANUFACTURING METHOD OF PUNCH DIE AND WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To reduce the arranging interval beetween punches of punch dies for forming opening parts in an insulating substrate. SOLUTION: This punch die includes: two or more punches; a punch plate having a support part for supporting the head parts of the punches; and a die having opening parts corresponding to the array of the punches. A second punch adjacent to a first punch is constructed so that the base of the head part is located rather closer to the cutting blade part side than the base of the head part of the first punch, and the distance from the base of the head part of the first punch to the base of the head part of the second punch is larger than the thickness of the head part of the first punch. COPYRIGHT: (C)2005,JPO&NCIPI