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:
Apr. 06, 1993
Filed:
Jan. 22, 1992
Armin Felber, Lucerne, CH;
Walter Nehls, Udligenswil, CH;
ESEC SA, Cham, CH;
Abstract
A method, and apparatus for performing the method, for the ultrasonic contacting wired connection of electrical circuits to metallic leadframe strips, which apparatus essentially includes a bonding head with the energy transducer located thereon for feeding to the process point of the leadframe strip and for producing a longitudinal vibration amplitude is supplied with a first voltage, the bonding head is associated a measuring head fixed to a machine base, and the measuring head has an optical/electrical sensor which measures the instantaneous amplitude of the longitudinal vibration of the infeed of the bonding head and determining a correction factor mathematically from the measured quantities obtained, and the first ultrasonic value for the vibration amplitude of the energy transducer is calibrated with the correction factor.