The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2005
Filed:
Jul. 19, 2002
Noboru Kawaike, Kyoto, JP;
Kenji Ueda, Kyoto, JP;
Kenji Matsui, Kyoto, JP;
Omron Corporation, Kyoto-fu, JP;
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.