Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2006-12-26
2006-12-26
Vigushin, John B. (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C174S262000, C174S264000, C174S266000, C257S698000, C257S700000, C361S780000, C361S794000
Reexamination Certificate
active
07154047
ABSTRACT:
A substrate (300) for a package of high frequency semiconductor devices comprising a planar insulating substrate having a plurality of parallel, planar metal layers (301a,301b, etc.) embedded in the insulator. The substrate further has at least one pair of parallel, metal-filled vias (302and303) traversing the substrate; the vias have a diameter and a distance from each other of at least this diameter. The metal in each via has a sheet-like extension (321a,321b, etc.) in each of selected planes of said metal layers, resulting in an increased via-to-via capacitance so that the reflection of a high frequency signal is less than 10%.
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