Patent ID: 7649143

Claim:
A wired-circuit-board assembly sheet, comprising: a plurality of wired circuit boards; distinguishing marks provided for distinguishing defectiveness of the wired circuit boards; and a supporting sheet comprising a metal supporting layer for supporting the wired circuit boards and the distinguishing marks; wherein openings are formed in the supporting sheet where the distinguishing marks are provided, wherein the distinguishing marks include removable portions provided in the openings for indicating whether the wired circuit boards are defective or non-defective, and a plurality of spoke-shaped, resin joint portions extending from each of the removable portions and for joining each of the removable portions and the supporting sheet, and wherein the joint portions are formed of only resin and are devoid of metal, such that when the removable portions are removed from the supporting sheet the joint portions are operative to be severed without any generation of metal powder.