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:
Jul. 31, 1990
Filed:
Dec. 18, 1989
John H Dion, Corvallis, OR (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Improved TAB circuit and method for producing the same. Specifically, new methods and materials are used to electro-plate and test TAB circuits. A typical TAB circuit includes a substrate having a plurality of conductive traces thereon, each trace terminating in a lead. All of the leads extend inwardly into a window through the substrate. To short the leads for electro-plating, a metal conductive portion is provided within the window which is attached to the leads. The conductive portion may consist of a separate unit secured to the leads, or may be integrally formed with the leads as a single unit. Testing of the traces for opens is accomplished by running a current from the conductive portion to the opposite end of each trace. For short testing, the conductive portion is easily severed from all of the leads using a punch assembly or the like.