MULTILAYER PRINTED-WIRING BOARD

摘要

PURPOSE:To restrain a warp from being caused even when individual layers for a multilayer printed-wiring board are formed to be respectively proper thicknesses. CONSTITUTION:An insulating reinforcement layer 2 is laminated at least on one surface of a multilayer printed-wring board 1. In order to enhance an electric characteristic, individual layers for the multilayer printed-wiring board 1 are formed to be respectively proper thicknesses. Even when the constitution of the layers is made asymmetric in their thickness direction, it can be corrected so as to obtain the symmetry of the layers by the insulating reinforcement layer 2, and it is possible to restrain a warp from being caused as far as possible.