Apparatus and method for improving AC coupling on circuit...

Active solid-state devices (e.g. – transistors – solid-state diode – Transmission line lead

Reexamination Certificate

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Details

C257S501000, C257S503000, C257S647000, C257SE23006, C257SE23169

Reexamination Certificate

active

07495318

ABSTRACT:
The invention relates to an apparatus and method for improving AC coupling between adjacent signal traces and between plane splits and signals spanning plane splits on circuit boards. A circuit board includes adjacent conductive means and an oxide means interposed there between. The oxide means is a copper oxide, e.g., cupric or cuprous oxide. In one embodiment, the adjacent conductive means are adjacent voltage reference planes with a split interposed between the conductive means. The copper oxide fills the split. In another embodiment, the adjacent conductive means are differential signal traces. The copper oxide fills a gap between the differential signal traces. The copper oxide is a non-conductive material with an increased dielectric constant as compared to other common dielectric materials used as fillers. The increased dielectric constant increases capacitance, in turn, increasing AC coupling.

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