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. 06, 2004
Filed:
Mar. 15, 2002
Farhad Farassat, Taufkirchen, DE;
F&K Delvotec Bontechnik GmbH, Ottobrunn, DE;
Abstract
An apparatus for performing a pull test to determine the resistance of a bonded-wire loop extending between two bond contacts on a substrate to tensile force. The apparatus includes a traction hook controllably inserted under the bonded-wire loop, a drive device connected to the hook and generating a tensile force directed substantially perpendicular to the substrate surface, a force-measurement device associated with the hook to detect the tensile force at each moment, and a recording device connected to the force-measurement device in order to record a breaking force value for the bonded-wire connection. The force-measurement device is disposed substantially coaxially with the vector of the tensile force. The apparatus also includes a detector to detect the highest point of bonded-wire loop and a position controller for the automatic positioning of the traction hook and thus the tensile force vector origin substantially adjacent the highest point of the bonded-wire loop.