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US 2025/0107055 A1Published application
Absorber for printed circuit board assembly
AssigneeCisco Technology, Inc.
InventorsWenbin Ma, Shiqing He, Yong Wu, Joel Richard Goergen, Mike Sapozhnikov, Xinghai Tang, Dewen Xu, Haiying Zhu
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Abstract
Presented herein is a printed circuit board (PCB) assembly with an absorber having a perforated structure. The absorber is positioned between a trace of a PCB and a connector that couples the PCB to an enclosure. The absorber includes a perforated structure to maintain an integrity of a signal propagated along the trace, while improving electromagnetic interference and/or electromagnetic compatibility properties.
Claims20
An apparatus comprising:
- a layer of a printed circuit board;
- a trace routed along the layer and configured to transmit a signal;
- and
- an absorber positioned over the trace, wherein the absorber is formed of material that absorbs electromagnetic emissions from the trace, the absorber comprises a plurality of openings, and an opening of the plurality of openings overlaps with the trace.
1 more element
An apparatus comprising:
- a printed circuit board having a trace that is configured to transmit a signal;
- and
- a perforated sheet positioned over the trace, wherein the perforated sheet includes a hole that exposes the trace through the perforated sheet, and.
A method comprising:
- providing a layer of a printed circuit board, the layer comprising a trace routed along the layer, wherein the trace is configured to propagate a signal;
- providing an absorber with a base;
- determining a frequency of the signal to be propagated along the trace;
- forming a plurality of openings in the base of the absorber based on the frequency of the signal;
- and
- positioning the absorber over the trace.
3 more elements
Dependencies are inferred from the claim text.