Patent ID: 6768316
Filing Date: 2004-07-27
Classification: B32B,H01G,H05K,Y10T

Abstract:
A method for preparing a laminate for electrical insulation testing, the method comprising:providing a laminate comprising an insulation layer sandwiched between a pair of conductive layers comprising electrically conductive material, wherein at least one of the conductive layers has a pair of surfaces facing opposite directions, one of the surfaces being bonded to the insulation layer and the other surface being exposed; directing a laser beam along a path on the exposed surface of the conductive layer, wherein the path is proximate one or more edges of the exposed surface, the laser beam removing a strip from the conductive layer to expose a strip on a surface of the insulation layer, wherein the exposed strip on the insulation layer surrounds and electrically isolates a remaining central portion of the conductive layer from the edge of the laminate; then testing the resistance to electrical current between the conductive layers; and then, if the resistance is above a specified limit, forming wiring patterns by selectively removing additional conductive material from the conductive layer onto which the laser beam was directed.