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:
Jul. 31, 2007
Filed:
Jul. 20, 2005
Noboru Kawaike, Koyoto, JP;
Kenji Ueda, Kyoto, JP;
Kenji Matsui, Kyoto, JP;
Omron Corporation, Kyoto-Shi, JP;
Abstract
A detection unitfor detecting an electric field or a magnetic field is placed above a circuit boardto be detected. A control deviceallows the detection unitto carry out detection processes while moving the detection unitin a predetermined direction with an electric current being applied to the circuit boardso that an electric field distribution or a magnetic field distribution on the circuit boardis detected. Moreover, the control devicecompares 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 boardis 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.