John David Roth

US Patent:

59388544, Aug 17, 1999

Filed:

Jun 2, 1995

Appl. No.:

8/458136

Inventors:

John Reece Roth - Knoxville TN

Assignee:

The University of Tennessee Research Corporation - Knoxville TN

International Classification:

C23F 100

US Classification:

134 1

Abstract:

The surface of a workpiece is cleaned by generating a steady-state one atmosphere glow discharge plasma above the surface of the workpiece. The use of one atmosphere, uniform glow discharge plasmas generated by a low frequency RF ion trapping mechanisms is preferred. The plasma used to effect surface cleaning may be formed in atmospheric air or other gases at about one atmosphere of pressure, or at pressures below or above one atmosphere.

US Patent:

54569729, Oct 10, 1995

Filed:

May 28, 1993

Appl. No.:

8/068739

Inventors:

John R. Roth - Knoxville TN
Peter P. Tsai - Knoxville TN

Assignee:

The University of Tennessee Research Corporation - Knoxville TN

International Classification:

D03D 300

US Classification:

428224

Abstract:

Polymer materials such as film and fabrics, woven, non-woven and meltblown, may be non-destructively surface treated to improve water wettability by exposure to a glow discharge plasma sustained at substantially atmospheric pressure in a modified gas atmosphere comprising helium or argon.

US Patent:

53878426, Feb 7, 1995

Filed:

May 28, 1993

Appl. No.:

8/068508

Inventors:

John R. Roth - Knoxville TN
Peter P. Tsai - Knoxville TN
Chaoyu Liu - Knoxville TN

Assignee:

The University of Tennessee Research Corp. - Knoxville TN

International Classification:

H01J 724
H05B 3126

US Classification:

31511121

Abstract:

A steady-state, glow discharge plasma is generated within the volume between a pair of parallel, insulated metal plate electrodes spaced up to 5 cm apart and R. F. energized with an rms potential of 1 to 5 KV at 1 to 100 KHz. The electrodes are located within an enclosure capable of maintaining an atmosphere other than atmospheric air between the electrode surfaces. Space between the electrodes is occupied by a noble gas such as helium, neon, argon, etc. or mixtures thereof.

US Patent:

49890069, Jan 29, 1991

Filed:

Oct 17, 1989

Appl. No.:

7/425141

Inventors:

John R. Roth - Knoxville TN

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01Q 1700

US Classification:

342 1

Abstract:

Microwave absorption in a varying magnetic field is investigated near electron cyclotron resonance with a network analyzer which is capable of swept frequency measurements, and of measuring reflection and transmission coefficients from 0. 045 to 18 GHz, with greater than 80 dB dynamic range. The experimental conditions are such that the plasma is generated in a modified Penning discharge in a magnetic mirror configuration. A microwave beam is caused to propagate along the axis of the magnetic mirror field in the plasma column. The microwave beam is attenuated near the electron cyclotron resonance frequency, providing microwave absorption over a range of frequencies spanning the electron cyclotron frequencies present in the axially varying magnetic field. The attenuation, along with hot-plasma effects, are measured as a function of frequency by the network analyzer.

US Patent:

54034531, Apr 4, 1995

Filed:

Oct 29, 1993

Appl. No.:

8/145349

Inventors:

John R. Roth - Knoxville TN
Peter P. Tsai - Knoxville TN
Larry C. Wadsworth - Knoxville TN
Chaoya Liu - Knoxville TN
Paul D. Spence - Knoxville TN

Assignee:

The University of Tennessee Research Corporation - Knoxville TN

International Classification:

H05F 300

US Classification:

204164

Abstract:

Polymer materials such as film and fabrics, woven, non-woven and meltblown, may be non-destructively surface treated to improve water wettability, wickability, and other characteristics by exposure to a glow discharge plasma sustained at substantially atmospheric pressure in air or modified gas atmospheres comprising helium or argon.

US Patent:

61467243, Nov 14, 2000

Filed:

Sep 23, 1997

Appl. No.:

8/935752

Inventors:

John Reece Roth - Knoxville TN

Assignee:

The University of Tennessee Research Corporation - Knoxville TN

International Classification:

B32B 108

US Classification:

428 342

Abstract:

A laminate which includes a barrier layer of OAUGDP bonded silicon oxide and a cellulosic or thermoplastic base layer. A process for applying same. A package container which includes the laminate.

US Patent:

56695837, Sep 23, 1997

Filed:

Jun 6, 1994

Appl. No.:

8/254264

Inventors:

John Reece Roth - Knoxville TN

Assignee:

University of Tennessee Research Corporation - Knoxville TN

International Classification:

B64C 138

US Classification:

244130

Abstract:

Method and apparatus for covering a free-standing body with a uniform glow discharge plasma, particularly at atmospheric pressure. The method may be used to provide a body coated with such a plasma, and also to treat a workpiece.

US Patent:

54143241, May 9, 1995

Filed:

Oct 29, 1993

Appl. No.:

8/145786

Inventors:

John R. Roth - Knoxville TN
Peter P. Tsai - Knoxville TN
Chaoyu Liu - Knoxville TN
Mounir Laroussi - Knoxville TN
Paul D. Spence - Knoxville TN

Assignee:

The University of Tennessee Research Corporation - Knoxville TN

International Classification:

H01J 724

US Classification:

31511121

Abstract:

A steady-state, glow discharge plasma is generated at one atmosphere of pressure within the volume between a pair of insulated metal plate electrodes spaced up to 5 cm apart and R. F. energized with an rms potential of 1 to 5 KV at 1 to 100 KHz. Space between the electrodes is occupied by air, nitrous oxide, a noble gas such as helium, neon, argon, etc. or mixtures thereof. The electrodes are charged by an impedance matching network adjusted to produce the most stable, uniform glow discharge.