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:
May. 11, 1999
Filed:
Mar. 19, 1998
Douglas W Raymond, Orinda, CA (US);
Teradyne, Inc., Boston, MA (US);
Abstract
A manufacturing defect analyzer, for inspecting assembled printed circuit boards, including a light source, an optical receiver, a computer controller, and a memory. A plurality of key-points are specified for each component mounted to a printed circuit board. A data record characterizing each key-point is then stored in memory. Next, the defect analyzer measures the height of selected key-points relative to reference key-points for each component. Finally, the measured heights are compared with limit values, thereby determining whether each component is defectively attached to the printed circuit board. The data records facilitate inspection of printed circuit boards having components that are available in different package types.