Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Patent
1995-01-17
1996-11-05
Thomas, Laura
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
174 35R, 361785, 361791, 361816, 439 59, 439 61, 439 62, 336200, H05K 118, H05K 114
Patent
active
055719961
ABSTRACT:
A circuit board is provided having a plurality of vias and uniformly spaced connector stubs arranged upon one or both outer surfaces of the control board. Sets of trace conductors are formed within the control board between the vias. The trace conductors are arranged in two planes within the control board, wherein trace conductors within one plane are laterally offset from trace conductors in the other plane. Laterally offset trace conductors allow close spacing of the trace conductor planes while maximizing the spacing between trace conductors and corresponding reference conductors also placed within the control board. Additionally, the trace conductors are serpentine-shaped when viewed from a perspective perpendicular to the planar surface of the control board. The serpentine shape, in conjunction with carefully controlled spacing between planes of trace conductors as well as between the trace conductor planes and reference conductors, provides high impedance trace conductors in a limited space area necessary to meet SCSI specifications.
REFERENCES:
patent: 2942212 (1960-06-01), Mynall
patent: 3080541 (1963-03-01), Parker
patent: 3148347 (1964-09-01), Morrison
patent: 3436687 (1969-04-01), Andrews, Jr. et al.
patent: 3466580 (1969-09-01), Bull
patent: 5398046 (1995-03-01), Szegedi et al.
Pecone Victor K.
Slupek Darrell
Swamy N. Deepak
Dell USA L.P.
Garrana Henry N.
Kahler Mark P.
Thomas Laura
Turner Michelle M.
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