Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2007-07-31
2007-07-31
Tang, Minh N. (Department: 2829)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S750010
Reexamination Certificate
active
11184888
ABSTRACT:
A detection unit1for detecting an electric field or a magnetic field is placed above a circuit board4to be detected. A control device3allows the detection unit4to carry out detection processes while moving the detection unit1in a predetermined direction with an electric current being applied to the circuit board4so that an electric field distribution or a magnetic field distribution on the circuit board4is detected. Moreover, the control device3compares the results of the detection with reference data that has been preliminarily registered, and if there is any portion between the two pieces of data that is not coincident with each other, it is determined that the corresponding circuit board4is a defective circuit board. Thus, it is possible to detect any defective portion on the printed circuit board with high precision in a non-contact state to the circuit board.
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Kawaike Noboru
Matsui Kenji
Ueda Kenji
Foley & Lardner LLP
Omron Corporation
Tang Minh N.
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