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:
Mar. 28, 1995
Filed:
Oct. 18, 1993
Applicant:
Inventors:
Rajiv Roy, Garland, TX (US);
Charles K Harris, Dallas, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G06K / ;
U.S. Cl.
CPC ...
382-8 ; 348126 ; 348137 ; 356397 ;
Abstract
The invention is to a system and apparatus for determining the planarity of leads on a semiconductor device. An image system is used to locate the leads with reference to a reference plate on which the device is mounted, and a real-time reference which is used to provide a known correlation between image pixels and linear measurement such as mils.