Patent ID: 9478674
Filing Date: 2016-10-25
CPC Classification: H01L,H05K,Y02E,Y10T

Claim Text:
1. A method of manufacturing a circuit board, comprising: forming a plurality of metal electrodes so as to be separated from each other on a holding sheet by cutting a metal foil held on the holding sheet to remove a portion of the metal foil; forming adhesive layers on surfaces of the plurality of metal electrodes; adhering the adhesive layers to a base material by closely contacting the adhesive layers with the base material; and transcribing the adhesive layers and the plurality of metal electrodes onto the base material by detaching the holding sheet from the plurality of metal electrodes, wherein the portion of the metal foil is removed by the forming the plurality of metal electrodes comprises the detachment length is a length of when the metal foil is detached from the adhesive layer by setting a base line as a center, the base line being defined by a tip of a pushed punching blade when the tip of the punching blade is pushed onto the metal foil, the metal foil being laminated on the adhesive layer, in a cross section that is parallel to a thickness direction of the metal foil, and after laminating the metal foil and shredding the region which does not require the metal foil, a distance between the shredding line and the separating line in the cross section that is parallel to the thickness direction is set to be equal to or less than a value twice of the detachment length.