Anthony J Castellano

US Patent:

45995583, Jul 8, 1986

Filed:

Dec 14, 1983

Appl. No.:

6/561364

Inventors:

Anthony J. Castellano - New Fairfield CT
Thomas H. DiStefano - Bronxville NY
Robert S. Olyha - Yonkers NY

Assignee:

IBM - NY

International Classification:

G01R 3126
H01L 2166

US Classification:

324158R

Abstract:

An imaging system for detecting recombination center defects in a semiconductor wafer in which an oxidized wafer is pre-treated by charging the oxide in a corona discharge and then passing the charged wafer below a stationary bifurcated electrode. A focused laser beam is scanned between the arms of the bifurcated electrode and along its length as the wafer is slowly moved transversely to the direction of laser scanning. The signal from the bifurcated electrode is displayed in an imaging system, one axis of which is synchronized to the laser scanning and the other axis is synchronized to the movement of the wafer.

US Patent:

61306126, Oct 10, 2000

Filed:

May 11, 1999

Appl. No.:

9/309330

Inventors:

Anthony Castellano - Hopewell Junction NY
Harley Kent Heinrich - Brewster NY
Alejandro Gabriel Schrott - New York NY
Robert Jacob Von Gutfeld - New York NY

Assignee:

Intermec IP Corp. - Woodland Hills CA

International Classification:

G08B 1314

US Classification:

3405726

Abstract:

A radio frequency identification transponder (RFID tag) includes an RFID antenna and one or more elements of nonlinear magnetic material tuned to resonate at substantially the same frequency as the resonant frequency of the tag antenna. This co-resonance amplifies signals that impinge upon the antenna, yielding both a higher level signal from the antenna to the tag electronics and wider operational bandwidth for the tag. With the addition of the nonlinear magnetic material, the tag may also be employed as a magnetic surveillance tag, with the attendant non-screening capabilities. With a plurality of nonlinear magnetic elements tuned to different resonant frequencies, the tag may provide more "non-screenable" information, that is, two bits, or four binary states, for example, when two such elements are employed.