Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2011-08-16
2011-08-16
Semenenko, Yuriy (Department: 2835)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C361S760000
Reexamination Certificate
active
07999189
ABSTRACT:
A circuit board structure and a method for fabricating the same are disclosed, including providing a core board having conductive traces and solder pads respectively formed thereon, wherein width of the solder pads corresponds to that of the conductive traces, and pitch between adjacent solder pads is made wide enough to allow multiple conductive traces to pass through; forming on the core board an insulating layer with openings for exposing the solder pads therefrom; forming on the insulating layer a plurality of extending pads electrically connected to the solder pads respectively, wherein the projection area of the extending pads is larger than that of the corresponding solder pads and covers conductive traces adjacent to the corresponding solder pads. Thus, more conductive traces are allowed to pass between adjacent solder pads and meanwhile, the extending pads provide an effective solder ball wetting area for achieving good solder joints and sufficient height after collapse.
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Chang Hung-Ming
Chen Chin-Te
Yang Ke-Chuan
Corless Peter F.
Edwards Angell Palmer & & Dodge LLP
Jensen Steven M.
Semenenko Yuriy
Siliconware Precision Industries Co., LTD.
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