Frank J Adrian

US Patent:

50399446, Aug 13, 1991

Filed:

Nov 17, 1989

Appl. No.:

7/437578

Inventors:

Boris F. Kim - Pasadena MD
Joseph Bohandy - Columbia MD
Frank J. Adrian - Olney MD
Kishin Moorjani - Silver Spring MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

G01R 33035
H01L 3900

US Classification:

505 1

Abstract:

The invention relates to an apparatus and method to detect a magnetic field by measuring the magnetically modulated resistance of a superconductor maintained at its phase transition temperature (T. sub. c).

US Patent:

49049291, Feb 27, 1990

Filed:

Mar 20, 1989

Appl. No.:

7/325823

Inventors:

Joseph Bohandy - Columbia MD
Boris F. Kim - Pasadena MD
Terry E. Phillips - Ellicott City MD
Frank J. Adrian - Olney MD
Kishin Moorjani - Silver Spring MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

G01N 2700

US Classification:

324 716

Abstract:

Weak links in electrically continuous superconductors are detected by observing the effect of magnetic field modulation on the dc resistance of superconductors. The phase detected response to the magnetic modulation shows a peak at T. sub. c. The presence of a second peak at temperatures below T. sub. c, and concomitantly the appearance of a tail on the low temperature end of the dc resistance vs temperature curve indicates the presence of weak links in the superconductor.

US Patent:

49701967, Nov 13, 1990

Filed:

Aug 19, 1988

Appl. No.:

7/235817

Inventors:

Boris F. Kim - Laurel MD
Joseph Bohandy - Columbia MD
Frank J. Adrian - Olney MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

B05D 306
B05D 102

US Classification:

505 1

Abstract:

The present invention provides an apparatus and method for laser direct writing of materials onto a receiving substrate using a high power pulsed laser. The invention includes a pulsed laser light source, a receiving substrate, disposed opposite the pulsed laser light source, and an optically transparent source support substrate positioned between the receiving substrate and the pulsed laser light source, wherein a surface of the optically transparent source support substrate facing the receiving substrate has coated thereon a thin film of material to be deposited on the receiving substrate. Laser direct writing using the invention is accomplished by impinging the thin film of material with a pulsed laser light from the pulsed laser light source causing material to be selectively "blown off" the optically transparent source support substrate and deposited onto the surface of the receiving substrate.

US Patent:

50598910, Oct 22, 1991

Filed:

Dec 28, 1989

Appl. No.:

7/458066

Inventors:

Joseph Bohandy - Columbia MD
Boris F. Kim - Pasadena MD
Terry E. Phillips - Ellicott City MD
Frank J. Adrian - Olney MD
Kishin Moorjani - Silver Spring MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

G01N 2714
G01R 2704

US Classification:

324 716

Abstract:

Weak links in superconductors are detected by observing the effect of magnetic field modulation on the microwave resistance of superconductors. The phase detected response to the magnetic modulation can show a peak at T. sub. c. The presence of peak(s) at temperatures below T. sub. c indicates the presence of weak links in the superconductor.