Patent ID: 6930255
Filing Date: 2005-08-16
Classification: H05K,Y10S,Y10T

Abstract:
1. A multilayer printed circuit board comprising a plurality of interlaminar insulating layers and conductor circuits, said printed circuit board being formed by laminating a first interlaminar insulating layer on a conductor circuit of a substrate and forming at least a second conductor circuit and a second interlaminar insulating layer on the first interlaminar insulating layer; said at least one second conductor circuit including an outermost conductor circuit having at least one alignment mark; a solder resist layer having an opening portion formed on the outermost conductor circuit covering a peripheral edge of the outermost conductor circuit; said at least one alignment mark is defined by said opening portion formed by exposing only the surface of the outermost conductor circuit from the solder resist layer; and a roughened layer is formed on at least a part of the surface of the outermost conductor circuit.