摘要 |
A method of manufacturing a p.c.b. comprises providing a thickness adjusting film 9 on a substrate 4 splittable by means of slit 5 and perforations 6; and form at on of the slit and perforations by means of a pressing and punching process. Film 9 offsets gaps between the pressing molds (7, 8) (Fig. 4) due to circuit 2 for example, and prevents the formation of cracks during pressing. <IMAGE> |