Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2005-08-30
2005-08-30
Tang, Minh N. (Department: 2829)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
Reexamination Certificate
active
06937035
ABSTRACT:
A detection unit for detecting an electric field or a magnetic field is placed above a circuit to be detected. A control device allows the detection unit 4 to carry out detection processes while moving the detection unit in a predetermined direction with an electric current being applied to the circuit board so that an electric field distribution or a magnetic field distribution on the circuit board is detected. Moreover, the control device compares the results of the diction 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 board is a defective circuit board. Thus, it is possible to detect any defective portion on the printed circuit 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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