PRINTED CIRCUIT BOARD, DESIGN METHOD THEREOF AND MAINBOARD OF TERMINAL PRODUCT

摘要

A printed circuit board, a method for designing the same and a main board of a final product are provided to reduce production costs and improve reliability by reducing the number of a layer to be stacked. A printed circuit board includes external layers(10, 40) and at least one internal layer(20, 30) between the external layers. The internal layer is used for arranging a wire which is arranged at the internal layer by unit. And the external layers are not wired of wired with less lines, and connected together by a through via(70).