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:
Dec. 12, 2000
Filed:
Nov. 06, 1998
Akira Nurioka, Fukyama, JP;
OHT Inc., Hiroshima-ken, JP;
Abstract
An inspection apparatus inspects an electronic circuit board on which a plurality of bonding pads and a plurality of pin pads are connected to each other through conductive patterns. A probe having a contact pin is moved on the electronic circuit board along a straight line substantially constituted by a terminal group without separating the contact pin from the surface of the electronic circuit board. This moving operation is a 'wiping' operation. In the process of movement, an identifiable electrical signal is applied to the contact pin, and a return signal is detected at each pin pad. This return signal is compared with a reference signal obtained in advance by using a reference circuit board. A discontinuity or short in each conductive pattern is determined on the basis of the comparison result.