Measuring and testing – Vibration – Sensing apparatus
Reexamination Certificate
2006-07-05
2010-10-26
Surin, J M Saint (Department: 2856)
Measuring and testing
Vibration
Sensing apparatus
C228S001100, C228S110100
Reexamination Certificate
active
07819013
ABSTRACT:
An apparatus and method for detecting the oscillation amplitude of a bonding tool includes a sensing unit disposed adjacent to and at a distance from the bonding tool. The sensing unit includes a pair of electrodes, a piezoelectric sensing layer located between the pair of electrodes, and a membrane associated with the piezoelectric sensing layer. The piezoelectric sensing layer becomes sensitive to ultrasonic vibrations and generates electrical voltage signals after being activated by a poling process. An optional pre-amplifier is used to amplify the signals generated from the sensing unit, and an oscilloscope is used to further process the signals.
REFERENCES:
patent: 3857279 (1974-12-01), Salzer et al.
patent: 4854494 (1989-08-01), von Raben
patent: 5101599 (1992-04-01), Takabayasi et al.
patent: 5199630 (1993-04-01), Felber et al.
patent: 5431324 (1995-07-01), Kajiwara et al.
patent: 5623307 (1997-04-01), Kotidis et al.
patent: 5734108 (1998-03-01), Walker et al.
patent: 6181431 (2001-01-01), Siu
patent: 6286747 (2001-09-01), Chan et al.
patent: 6323943 (2001-11-01), Maruyama et al.
patent: 6424407 (2002-07-01), Kinrot et al.
patent: 6700309 (2004-03-01), Dausch et al.
patent: 6827247 (2004-12-01), Fan et al.
Chan Helen Lai Wa
Chao Chen
Kwok Kin Wing
Lam Tin Yan
M Saint Surin J
The Hong Kong Polytechnic University
Wang George G.
Wilkinson & Grist
LandOfFree
Method and apparatus for measuring oscillation amplitude of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring oscillation amplitude of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring oscillation amplitude of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4210224