Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1996-06-28
1998-03-31
Ryan, Patrick
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
4284228, 4283084, 428344, 428334, 4283044, 4283173, 4284251, 428901, 174256, B32B 300, B32B 2700, B32B 514, B32B 712
Patent
active
057336393
ABSTRACT:
A laminated circuit board comprising a high frequency, low dielectric, and low dissipation factor foam substrate layer and at least one metal cladding layer laminated to the foam substrate layer. The foam substrate layer is formed of a closed-cell polyisocyanurate rigid foam having a closed-cell structure greater than 95%.
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Cam Cathy F.
Poly Circuits/M-Wave
Ryan Patrick
LandOfFree
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