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. 17, 1992
Filed:
Jul. 05, 1990
Abstract
A cathode roller mechanism comprises a tapered cathode roller for establishing an electrical connection to a semiconductor lead frame and an elastic, frictional pressure roller. The cathode roller comprises a tapered roller body defining a tapered side surface and an electrically conductive stopper disposed on the roller body and having an inner tapered electrode. The pressure roller is arranged so that the path of a drifted lead frame can be corrected, and the drift of the lead frame can be positively prevented by pressing the lead frame in such a manner that no drift of the lead frame occurs. In addition, an auxiliary electrode is provided on the inside of the tapered electrode, a third tapered surface is provided on the auxiliary electrode, and the width of the pressure roller is set to a length sufficient to press a corner of a molded portion of lead frame having the maximum width so that electrical continuity, i.e., the connection between the lead frame and the electrode, can be stabilized, and the lead frame can be more stably made a cathode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile