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:
Oct. 01, 1991
Filed:
Aug. 29, 1989
Applicant:
Inventors:
Minoru Nakamura, Nakano, JP;
Yasuhiro Oshiro, Nakano, JP;
Assignee:
Denyo Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
374-5 ; 374124 ; 374137 ; 228105 ;
Abstract
A plurality of lead wires such as those from an IC (an integrated circuit) is irradiated by a fan beam at same time. Infrared rays radiated from the portion which is irradiated by the fan beam and the periphery of the portion are detected so as to catch a thermogram exhibiting the temperature distribution. The thermogram is processed by image processing so as to produce a temperature distribution image. This image is visually compared with a standard temperature distribution-pattern on a display apparatus to judge whether soldering on those lead wires is defective or not.