Flexible printed circuit board

Details Flexible printed circuit board Flexible printed circuit board

2011-08-30

2011-08-30

Semenenko, Yuriy (Department: 2835)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C361S794000

Reexamination Certificate

active

08008580

ABSTRACT:
A flexible printed circuit board (FPCB) includes a signal layer, upper and lower ground layers, and two dielectric layers. The signal layer includes a differential pair comprising two transmission lines to transmit a pair of differential signal. The dielectric layers are respectively located on and under the signal layer to sandwich the signal layer. The upper ground layer is attached to the dielectric layer on the signal layer. The lower ground layer is attached to the dielectric layer under the signal layer. Each ground layer defines a void therein aligning with the differential pair. Dielectric coefficients of the two dielectric layers are different.

REFERENCES:
patent: 4680557 (1987-07-01), Compton
patent: 5003273 (1991-03-01), Oppenberg
patent: 6420778 (2002-07-01), Sinyansky
patent: 7235457 (2007-06-01), Forbes et al.
patent: 7609125 (2009-10-01), van Quach et al.
patent: 2005/0201072 (2005-09-01), He et al.

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