FILTER DEVICE
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United States of America Patent
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Issued Date -
Jan 7, 2016
app pub date -
Aug 27, 2014
filing date -
Jul 4, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed herein is a filter device for suppressing ground bounce and electromagnetic interference. The filter device comprises a dielectric substrate, a signal transmission layer, a signal via, a plurality of ground vias, and first, second, and third metal layers. The signal transmission layer is located on the dielectric substrate, the vias and the first and second metal layers in the dielectric substrate, and the third metal layer underneath it. The first metal layer has a filter portion and a resonance portion. The ground vias connect the second and third metal layers and are disposed perpendicularly to them. The signal via, disposed in a via space defined by the ground vias, connects the first metal layer and the signal transmission layer. As a result, the resonance portion is able to reduce noise of a certain frequency band, the ground vias abate ground bounce, and electromagnetic interference is minimized.
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