Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-02-03
2008-09-02
Norris, Jeremy C (Department: 2841)
Metal working
Method of mechanical manufacture
Electrical device making
C174S261000
Reexamination Certificate
active
07418779
ABSTRACT:
A method and apparatus for balancing power plane pin currents in a printed wiring board (PWB) uses a set of collinear slots in the form of a dashed line to reduce pin counts required for power plane (including ground plane) connections and/or reduction in requirements for connector current handling per pin. The slots are introduced in the metal layer implementing the power plane that alter the current distribution in the power plane. The per-pin current profile for connector pins connected to the power plane is equalized by tuning the length of the slot(s). The slots may be shaped around a connector end when the power plane pin allocation is not uniform at the connector ends. The resulting equalization reduces either pin count required for carrying the power plane current or reduces connector pin current requirements.
REFERENCES:
patent: 6640435 (2003-11-01), Balakrishnan
patent: 2002/0044022 (2002-04-01), Shintani et al.
patent: 2004/0053635 (2004-03-01), Haapala et al.
Harrer Hubert
Huber Andreas
Winkel Thomas-Michael
Harris Andrew M.
International Business Machines - Corporation
Mitch Harris Atty at Law, LLC
Norris Jeremy C
Salys Casimer K.
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