Patent ID: 7346982
Filing Date: 2008-03-25
Classification: H05K,Y10T

Abstract:
1. A method of fabricating a printed circuit board, comprising the steps of: preparing a base substrate which comprises a core insulating layer, release films attached to the core insulating layer, insulators separately formed from the core insulating layer and laminated so as to surround the release film, to form a resulting structure; and copper foils laminated on upper and lower sides of the resulting structure; maintaining the core insulating layer planar with the release film and the insulators; forming the insulators to have the same thickness with that of the release film; forming solder resists on upper and lower sides of the base substrate to form a resulting base substrate; laminating circuit layers and insulating layers sequentially on upper and lower sides of the resulting base substrate to form a resulting substrate; cutting edge portions of the resulting substrate so as to remove the edge portions which contain the insulators surrounding the release films; detaching the release films to divide the resulting substrate into two substrates so the two substrates are separated from the core insulating layer; and removing the copper foils from the substrates.