Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Patent
1991-10-18
1997-10-14
Thomas, Laura
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
174265, 174250, 174 35R, 361816, H05K 102
Patent
active
056775156
ABSTRACT:
A shielded printed wiring board is disclosed which provides electrical and magnetic isolation for the signal layers located thereon. The printed wiring board includes a signal layer laminated between two non-conductive dielectric layers. The bottom side of the printed wiring board has a conductive layer coated thereon. Grooves are routed through the printed circuit board on both sides of each signal layer extending from the top layer partially through to the conductive layer. Conductive metallic coatings are then provided to coat the board and thereby encapsulate the signal layer in a ground envelope, separated by a controlled thickness dielectric. In an alternate embodiment, a plurality of layers are laminated one on top of the other to provide a multilayer printed wiring board.
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Canyon James Carl
Gower Frederick M.
Hirsch Harold J.
Selk Kenneth Charles
Thomas Laura
TRW Inc.
Yatsko Michael S.
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