Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2008-06-20
2011-11-01
He, Amy (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
Reexamination Certificate
active
08049511
ABSTRACT:
A method of detecting faulty via holes of a printed circuit board. The printed circuit board including a number of electric trace segments. The method includes steps of: providing a testing system, the testing system comprising a processor, a storing means and a resistance measuring device, the storing means for storing a function Ymin=fmin(X) wherein X represents a reference resistance associated with a given electric trace segment, Yminrepresents a minimum threshold value; measuring a resistance of an electric trace segment of a to-be-tested printed circuit board using the resistance measuring device, a to-be-tested via hole located on the electric trace segment; and judging whether the to-be-tested via hole is a faulty via hole according to the following criteria: if |Xa−X|≧Ymin, the to-be-tested via hole is a faulty via hole, and if |Xa−X|<Ymin, the to-be-tested via hole is an acceptable via hole, wherein Xa represents the measured resistance of the given electric trace segment counterpart of the to-be-tested printed circuit board.
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Chiang I-Hsien
Tu Chih-Yi
Xiao Li
Altis Law Group, Inc.
FuKui Precision Component (Shenzhen) Co., Ltd.
He Amy
Zhen Ding Technology Co., Ltd.
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