Circuit board

Details Circuit board Circuit board

2007-03-06

2007-03-06

Reichard, Dean A. (Department: 2841)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C174S258000

Reexamination Certificate

active

10833948

ABSTRACT:
To provide a circuit board with improved electrical features with respect to a synchronization of signals, a circuit board comprises a dielectric substrate and a trace extending along a surface of the dielectric substrate, the trace having a first and second portion, the trace being covered by a first medium at the first portion, wherein the first medium is formed by an encapsulation element of a dielectric material so that the effective dielectric constant of the first medium is different from the effective dielectric constant of a medium extending over the trace at the second portion. Thus, a propagation speed difference can be created, when a signal travels along the first portion of the trace with respect to a signal propagation speed of a signal traveling along the second portion of the trace.

REFERENCES:
patent: 5355283 (1994-10-01), Marrs et al.
patent: 6621377 (2003-09-01), Osadchy et al.
patent: 2005/0051357 (2005-03-01), Wallace
patent: 2005/0201072 (2005-09-01), He et al.
patent: 2005/0241850 (2005-11-01), Cannon et al.

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