| 摘要 |
A stepped multilayer Printed Wiring Board (PWB) (10), having an increased number of wiring paths in selected regions, is comprised of a main multilayer PWB (12) having a sufficient number of layers (121,122,123...12n) to provide the lowest number of wiring paths required anywhere on the board. In regions where a larger number of wiring paths are required, a secondary, multilayer PWB section (22), having a sufficient number of layers (221,222,223) to provide the required additional number of wiring paths, is connected to the main PWB by a layer of anisotropically conductive material (30) sandwiched therebetween. A plurality of mechanical fasteners (33,33 min ), typically bifurcated or heat-staked plastic pins, extends through the secondary PWB section and the main PWB to hold one to the other. <IMAGE> |
