Patent · US Expired

Driver for an ultrasonic transducer and an ultrasonic transducer

US7462960B2 · kind B2 · utility

4Cited by

9References

18Claims

0Family size

Assignee

The Hong Kong Polytechnic University · CN

Inventors

Siu Wing Or · Sha Tin, CN
Chung Sheung Yung · Kwai Chung, CN
Helen Lai Wa Chan-Wong · Hong Kong, CN

Key dates

Filing date	Jan 5, 2004
Grant date	Dec 9, 2008
Priority date	—
Expiry date	Jan 5, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH01L2224/78301
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.