IP Library Granted Patent US 8,658,936
Granted Patent B2
US 8,658,936 · App. 13/336,616 · Granted Feb 25, 2014

Method and apparatus for processing metal bearing gases

Inventors: William M. Holber (Winchester, MA); John A. Smith (North Andover, MA); Xing Chen (Lexington, MA); Donald K. Smith (Belmont, MA)
Assignee: MKS Instruments Inc.
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Quick Facts
Patent No.
US 8,658,936
App. No.
13/336,616
Granted
Feb 25, 2014
Kind
B2
Abstract

A method and apparatus for processing metal bearing gases involves generating a toroidal plasma in a plasma chamber. A metal bearing gas is introduced into the plasma chamber to react with the toroidal plasma. The interaction between the toroidal plasma and the metal bearing gas produces at least one of a metallic material, a metal oxide material or a metal nitride material.

Claims (13)

1. A method for processing metal bearing gases, the method comprising:

receiving a metal bearing gas in a plasma chamber at a pressure via an inlet to the plasma chamber;

forming a toroidal plasma inside the plasma chamber, by passing current, generated by a solid state switching power supply comprising one or more switching semiconductor devices, through a primary winding of a transformer having a magnetic core surrounding a portion of the plasma chamber, the toroidal plasma reacting with the metal bearing gas to produce at least one of a metallic material, a metal oxide material or a metal nitride material; and

collecting the at least one of a metallic material, a metal oxide material or a metal nitride material via a device disposed relative to the plasma chamber.

2. The method of claim 1 , comprising providing at least a second gas to the plasma chamber.

3. The method of claim 2 , comprising producing a metal oxide material or a metal nitride material by the interaction of the plasma, the metal bearing gas and the second gas.

4. The method of claim 1 , further comprising collecting the at least one of a metallic material, a metal oxide material or a metal nitride material via the device.

5. The method of claim 1 , wherein the collecting step comprises filtering the at least one of a metallic material, a metal oxide material or a metal nitride material via the device.

6. The method of claim 1 , wherein the device is disposed external to the plasma chamber.

7. The method of claim 1 , wherein the device is a replaceable portion of the plasma chamber.

8. The method of claim 1 , wherein the device is selected from the group consisting of a filter, a particle trap, a cyclone trap or an electrostatic trap.

9. The method of claim 1 , further comprising outputting the at least one of a metallic material, a metal oxide material or a metal nitride material via an outlet of the plasma chamber.

10. The method of claim 1 , further comprising filtering the at least one of a metallic material, a metal oxide material or a metal nitride material via the device, wherein the device is selected from the group consisting of an external filter, particle trap, cyclone trap or electrostatic trap.

Assignments (5)
RELEASE OF SECURITY INTEREST Recorded Aug 24, 2022
From: BARCLAYS BANK PLC
To: MKS INSTRUMENTS, INC.; NEWPORT CORPORATION; ELECTRO SCIENTIFIC INDUSTRIES, INC.
Reel/Frame 062739/0001 →
RELEASE OF SECURITY INTEREST Recorded Feb 1, 2019
From: DEUTSCHE BANK AG NEW YORK BRANCH
To: MKS INSTRUMENTS, INC.; NEWPORT CORPORATION
Reel/Frame 048226/0095 →
SECURITY AGREEMENT Recorded May 4, 2016
From: MKS INSTRUMENTS, INC.; NEWPORT CORPORATION
To: BARCLAYS BANK PLC; BARCLAYS BANK PLC
Reel/Frame 038663/0139 →
SECURITY AGREEMENT Recorded May 4, 2016
From: MKS INSTRUMENTS, INC.; NEWPORT CORPORATION
To: DEUTSCHE BANK AG NEW YORK BRANCH
Reel/Frame 038663/0265 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 13, 2012
From: HOLBER, WILLIAM M.; SMITH, JOHN A.; CHEN, XING; SMITH, DONALD K.
To: MKS INSTRUMENTS, INC.
Reel/Frame 027527/0184 →
Continuity (9)
Continuation 12511785 · Jul 29, 2009
Division 11269917 · Nov 8, 2005
Continuation In Part 10837912 · May 3, 2004
Continuation 09804650 · Mar 12, 2001
Continuation In Part 09774165 · Jan 26, 2001
Continuation In Part 09659881 · Sep 12, 2000
Continuation 08883281 · Jun 26, 1997
Provisional Application 60625838 · Nov 8, 2004
Related Publication 20120160059A1 · Jun 28, 2012