Printed Wiring Board and Method for Manufacturing The Same

摘要

In a printed wiring board, an odd number (n) of conductive layers ( 11 - 13 ) and insulating layers ( 21 - 23 ) are alternately laminated upon another. The first conductive layer ( 11 ) is constituted as a parts connecting layer and the n-th conductive layer ( 13 ) is constituted as an external connecting layer which is connected to external connecting terminals ( 7 ). The second to (n- 1 )-th conductive layers ( 12 ) are constituted as current transmitting layers for transmitting internal currents. The surface of the n-th conductive layer ( 13 ) is coated with the outermost n-th insulating layer ( 23 ) in a state where the external connecting terminals ( 7 ) are exposed on the surface. It is preferable to constitute the initial insulating layers of a glass-cloth reinforced prepreg and the external insulating layers of a resin.