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:
Dec. 09, 2008
Filed:
Jan. 05, 2004
Siu Wing OR, Hong Kong, HK;
Chung Sheung Yung, Hong Kong, HK;
Helen Lai WA Chan-wong, Hong Kong, HK;
Siu Wing Or, Hong Kong, HK;
Chung Sheung Yung, Hong Kong, HK;
Helen Lai Wa Chan-Wong, Hong Kong, HK;
The Hong Kong Polytechnic University, Kowloon, Hong Kong, CN;
Abstract
An ultrasonic transducer driver has a giant magnetostrictive element, a fastener for holding the giant magnetostrictive element under mechanical pressure, a first field generator for providing a magnetic bias field, a second field generator for providing a magnetic drive field and a magnetic circuit for channelling the magnetic fields in the magnetostrictive element. An ultrasonic transducer for a bonding apparatus has a horn having a bonding tool at its smaller end and a mounting barrel adjoined onto it. The driver coupled to the larger end of the horn.