Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2006-05-25
2010-02-02
Norris, Jeremy C (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C361S792000
Reexamination Certificate
active
07655872
ABSTRACT:
The through holes in an array manner in the signal layer within the chip-interposed region on a substrate of a BGA package comprise a ball pads array having a plurality of ball pads and a vias array. The vias array has a plurality of vias located interlaces with the ball pads array. The outermost portions of the chip-interposed region are designed in such a manner to have at least two rings of vias for signal transmission and power connection. The interval between every two adjacent vias in the ring is not less than twice of the distance of two ball pads. Upon such an arrangement, the BGA package can have a plurality of dissipation channels that can increase dissipation space, dissipate quickly the heat generated from the IC, and transmit well for signal and power.
REFERENCES:
patent: 7405473 (2008-07-01), Shi et al.
patent: 7405474 (2008-07-01), Brophy
Chen Chun-Hung
Peng Yi-Hsin
Birch & Stewart Kolasch & Birch, LLP
Norris Jeremy C
Via Technologies Inc.
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