H - Electricity – 05 – K
Patent
H - Electricity
05
K
H05K 1/02 (2006.01) H05K 3/32 (2006.01) H05K 3/36 (2006.01) H05K 1/11 (2006.01) H05K 1/14 (2006.01)
Patent
CA 2073911
A stepped multilayer Printed Wiring Board (PWB) (10), having an increased numberof 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 lowestnumber of wiring paths required anywhere on the board. In regions where a largernumber 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 ofmechanical fasteners (33,33'), typically bifurcated or heat-staked plastic pins,extends through the secondary PWB section and the main PWB to hold one to the other.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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