Patent ID: 7036214
Filing Date: 2006-05-02
Classification: H05K,Y10T

Abstract:
1. A method of manufacturing a printed circuit board, comprising: preparing a plurality of printed films, each of which includes a thermoplastic resin film and a conductive circuit formed on at least one side of the resin film; forming holes in the resin films of the printed films; filling an interlayer connection material into the holes, for forming an interlayer connector for electrically connecting the conductive circuits between adjacent resin films; stacking the printed films in a stacking direction; bonding the resin films of the stacked printed films by heating and pressurizing, so that a multi-layer printed circuit board is formed; forming a silt at a predetermined position at least in a part of the resin films of the printed films, the forming the slit performed before the stacking; cutting a product portion from the multi-layer printed circuit board along an outline of the product portion; and arranging a separation sheet between predetermined adjacent layers of the resin films of the stacked printed films, corresponding to a removing portion and a residual portion of the product portion, before the bonding, wherein: the slit extends to have a slit length in an extending direction perpendicular to the stack direction, the slit length being equal to or larger than a dimension of the product portion in the extending direction; the slit extends to at least the outline of the product portion in the extending direction; the separation sheet is arranged to define a surface of the removing portion; and the slit extends in the stack direction from an outer surface of the printed films to the separation sheet, at two sides of the removing portion, so that the removing portion is defined by the separation sheet, the slit and the outline of the product.