Printed circuit board and method for processing printed circuit board

摘要

The invention is to provide a printed circuit board in which advance of packaging density of the printed circuit board and reduction in production cost can be attained while processing quality can be made uniform, a method for processing the printed circuit board and a method for producing the printed circuit board. There is provided a printed circuit board including an alternate laminate of electric conductor layers and electrically insulating layers, wherein a coating layer capable of absorbing laser light but insoluble in an etching solution dissolving the electric conductor layers is provided on a front surface of a first one of the electric conductor layers. In this case, the coating layer may be provided on a front surface of a rear one of the electric conductor layers. Each of the electric conductor layers may contain Cu as a main component while the coating layer may contain CuO as a main component. The coating layer may have a thickness not thinner than 0.6 mum.