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:
Feb. 07, 2006
Filed:
May. 23, 2002
Shuji Yamaoka, Hiroshima, JP;
Shogo Ishioka, Hiroshima, JP;
Shuji Yamaoka, Hiroshima, JP;
Shogo Ishioka, Hiroshima, JP;
OHT, Inc., Hiroshima, JP;
Abstract
Disclosed is a circuit-pattern inspection apparatus for inspecting a comb-shaped patternhaving an edge region formed as a plurality of finger pattern segments and a base region formed as an integral connection pattern segment, and a plurality of discrete patternseach disposed between the adjacent finger pattern segments in a non-connecting manner and being not in connecting with the remaining discrete patterns. The inspection apparatus comprises means for supplying an AC signal alternately to either one of the finger pattern segments and both the finger pattern segments and the discrete patterns while maintaining the other at a ground potential, and sensorsfor detecting the AC signal disposed in the edge region. The inspection apparatus can reliably detect the presence of defects in a circuit board without any difficulties.