Source: http://www.google.com/patents/US7975558?dq=U.S.+Patent+%23+5,723,324
Timestamp: 2014-07-10 06:00:12
Document Index: 568169110

Matched Legal Cases: ['Application No. 60', 'Application No. 07015987', 'Application No. 10', 'Application No. 200710140455', 'Application No. 10', 'Application No. 10']

Patent US7975558 - Method and apparatus for gas flow measurement - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA method and apparatus for measuring gas flow are provided. In one embodiment, a calibration circuit for gas control may be utilized to verify and/or calibrate gas flows utilized for backside cooling, process gas delivery, purge gas delivery, cleaning agent delivery, carrier gases delivery and remediation...http://www.google.com/patents/US7975558?utm_source=gb-gplus-sharePatent US7975558 - Method and apparatus for gas flow measurementAdvanced Patent SearchPublication numberUS7975558 B2Publication typeGrantApplication numberUS 12/823,935Publication dateJul 12, 2011Filing dateJun 25, 2010Priority dateAug 14, 2006Also published asCN101127296A, CN101127296B, EP1890117A1, US7743670, US20080035202, US20100251828Publication number12823935, 823935, US 7975558 B2, US 7975558B2, US-B2-7975558, US7975558 B2, US7975558B2InventorsJared Ahmad Lee, Ezra Robert Gold, Chunlei Zhang, James Patrick Cruse, Richard Charles FovellOriginal AssigneeApplied Materials, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (23), Non-Patent Citations (7), Referenced by (1), Classifications (12), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for gas flow measurementUS 7975558 B2Abstract A method and apparatus for measuring gas flow are provided. In one embodiment, a calibration circuit for gas control may be utilized to verify and/or calibrate gas flows utilized for backside cooling, process gas delivery, purge gas delivery, cleaning agent delivery, carrier gases delivery and remediation gas delivery, among others.
1. Apparatus for verifying a gas flow in a processing system having a processing chamber, comprising:
an orifice having a flow resistance substantially the same as a flow resistance of the processing chamber;
a diverter valve having an inlet, a first outlet and a second outlet, wherein the first outlet is coupled to the orifice and the second outlet is coupled to the processing chamber;
a sensing circuit coupled to the orifice, wherein the sensing circuit receives a flow passing through the orifice to verify the flow through the regulating device.
2. The apparatus of claim 1, wherein the sensing circuit further comprises a tank which receives the flow passing through the orifice.
3. The apparatus for claim 2, wherein the tank has a calibrated volume for receiving the flow passing through the orifice.
a vibrating member disposed in the calibrated volume of the tank.
5. The apparatus for claim 4, wherein the sensing circuit further comprises: a sensor which detects at least one of electrical or magnetic characteristics of gases disposed in the calibrated volume.
6. The apparatus for claim 3, wherein the sensing circuit further comprises:
a displacement device attached to the tank, wherein the displacement device causes the tank to oscillate; and
a sensor interfaced with the tank.
7. The apparatus for claim 3, wherein the sensing circuit further comprises:
a signal generator which generates an acoustic pulse inside the calibrated volume of the tank; and
a sensor which measures the acoustic pulse generated by the signal generator.
8. The apparatus for claim 2, wherein the tank has a non-calibrated volume for receiving the flow passing through the orifice.
9. The apparatus for claim 8, wherein the sensing circuit further comprises:
a cantilever supporting the tank; and
a sensor which measures measure a change in orientation of the tank.
10. The apparatus for claim 8, wherein the sensing circuit further comprises:
a piston disposed in the tank; and
a sensor which determines a displacement of the piston.
11. The apparatus of claim 1, wherein the sensing circuit further comprises:
a plurality of tanks, wherein each of the plurality of tanks has a calibrated volume receiving the flow passing through the orifice, and the calibrated volume of the plurality of tanks is different from one another; and
a selector valve coupled between the orifice and the plurality of tanks.
12. The apparatus for claim 2, wherein the sensing circuit further comprises:
a by-pass loop; and
13. The apparatus of claim 1, wherein the orifice is a variable restriction having an adjustable flow resistance.
14. A method for calibrating gas flow in a semiconductor processing system, comprising:
setting a gas flow from a gas source towards a sensing circuit with a flow control device;
maintaining the gas flow in a chocked flow condition by flowing the gas flow from the flow control device to an orifice having a flow resistance substantially the same as a flow resistance of a processing chamber; and
determining a property of the gas flow by flowing the gas flow from the orifice into the sensing circuit which calibrates the gas flow set by the flow control device.
15. The method of claim 14, wherein determining the property comprises:
flowing the gas into a tank of the sensing circuit, wherein the tank has a calibrated volume;
sensing at least one property and/or attribute of the gas in the calibrated volume; and
resolving a flow rate and/or pressure of the gas entering the sensing circuit from the sensed property and/or attribute.
16. The method of claim 14, wherein determining the property comprises:
flowing the gas into a tank of the sensing circuit, wherein the tank has a non-calibrated volume;
sensing at least one property and/or attribute of the gas in the non-calibrated volume; and
17. The method of claim 14, further comprising comparing a flow rate determined using the sensing circuit with the setting of the flow control device.
18. The method of claim 14, further comprising adjusting the orifice so that the flow resistance of the orifice is substantially the same as the flow resistance of the processing chamber.
19. The method of claim 18, wherein adjusting the orifice comprises:
measuring the pressure downstream of the orifice; and
adjusting the size of the orifice until a desired pressure is realized.
20. Apparatus for verifying a gas flow in a processing system having a processing chamber, comprising:
a regulating device fluidly coupled to the gas source;
a sensing circuit receiving a flow passing through the regulating device to verify the flow through the regulating device;
a diverter valve having an inlet, a first outlet and a second outlet, wherein the inlet is coupled to the flow regulating device, the first outlet is coupled to the sensing circuit, the second outlet is coupled to the processing chamber, and the diverter valve selectively directs the flow from the regulating device to the sensing circuit or the processing chamber; and
an orifice disposed between the diverter valve and the sensing circuit, wherein the orifice is sized to create a critical flow condition, and the critical flow condition allows the sensing circuit to verify the flow from the regulating device without requiring a flow into the processing chamber.
21. The apparatus of claim 20, wherein the orifice is a fixed restriction having a flow resistance substantially similar to a flow resistance of the processing chamber.
22. The apparatus of claim 20, wherein the orifice is a variable restriction having an adjustable flow resistance.
CROSS-REFERENCE TO OTHER APPLICATIONS This application is a continuation of a U.S. patent application Ser. No. 11/833,623, filed on Aug. 3, 2007, now U.S. Pat. No. 7,743,670, which claims the benefit of U.S. Provisional Application No. 60/822,345 filed Aug. 14, 2006. Each of the aforementioned patent application is herein incorporated by reference.
FIG. 2 is a schematic diagram of one embodiment of the sensing circuit 146. The sensing circuit 146 generally includes a tank 202 having a vibrating member 204 disposed therein. A sensor 206 is interfaced with the vibrating member 204 in a manner suitable for providing a processor 208 with a metric indicative of the frequency of oscillation of the vibrating member 204, which may be correlated to the density of gas within the tank 202. In one embodiment, the sensor 206 is an accelerometer or other suitable sensor.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6119710May 26, 1999Sep 19, 2000Cyber Instrument Technologies LlcMethod for wide range gas flow system with real time flow measurement and correctionUS6216726Aug 17, 2000Apr 17, 2001Cyber Instrument Technologies LlcWide range gas flow system with real time flow measurement and correctionUS6299753Sep 1, 1999Oct 9, 2001Applied Materials, Inc.A fluid delivery system with particular application to electroplating.US6508913Oct 25, 2001Jan 21, 2003Lam Research CorporationGas distribution apparatus for semiconductor processingUS6704667May 13, 2002Mar 9, 2004Taiwan Semiconductor Manufacturing Co., LtdReal time mass flow control system with interlockUS7743670 *Aug 3, 2007Jun 29, 2010Applied Materials, Inc.Method and apparatus for gas flow measurementUS7775236 *Feb 26, 2007Aug 17, 2010Applied Materials, Inc.Method and apparatus for controlling gas flow to a processing chamberUS7846497 *Feb 26, 2007Dec 7, 2010Applied Materials, Inc.Method and apparatus for controlling gas flow to a processing chamberUS20030145791Feb 6, 2003Aug 7, 2003Tokyo Electron LimitedThermal processing apparatusUS20030190804Apr 9, 2002Oct 9, 2003Glenn W. BenjaminSimultaneous cyclical deposition in different processing regionsUS20030212507May 13, 2002Nov 13, 2003Taiwan Semiconductor Manufacturing Co., Ltd.Real time mass flow control system with interlockUS20040261492Jun 25, 2003Dec 30, 2004Kaveh ZarkarSystem and method for in-situ flow verification and calibrationUS20060123920Dec 15, 2004Jun 15, 2006Tison Stuart ASystem and method for measuring flowUS20060162466Jul 18, 2003Jul 27, 2006Christopher WargoFluid flow measuring and proportional fluid flow control deviceUS20060280867Feb 22, 2006Dec 14, 2006Park Jin-HoApparatus and method for depositing tungsten nitrideUS20080000530May 25, 2007Jan 3, 2008Applied Materials, Inc.Gas flow control by differential pressure measurementsUS20080035202Aug 3, 2007Feb 14, 2008Lee Jared AMethod and apparatus for gas flow measurementUS20090266139 *Apr 22, 2009Oct 29, 2009Applied Materials, IncReal time lead-line characterization for mfc flow verificationEP0323205A1Dec 28, 1988Jul 5, 1989Nomix-Chipman LimitedApparatus for delivering a liquidJP2004003957A Title not availableJP2006012872A Title not availableKR20060004656A Title not availableWO1997019329A1Oct 31, 1996May 29, 1997Mks Instr IncSystem for measuring a gas mass flow* Cited by examinerNon-Patent CitationsReference1Extended European Search Report dated Dec. 18, 2007 for European Application No. 07015987.6.2GBROR� data sheet; Gas Box Rate-of-Rise in Situ Flow Verifier, MKS Instruments, Inc., http://www.mksinst.com/docs/UR/gbror.pdf; downloaded Nov. 16, 2007. copy consists of 8 pages, Mar. 2007.3Notice of Final Rejection dated May 31, 2010 for Korean Patent Application No. 10-2007-0081657.4Notification of First Office Action dated Mar. 13, 2009 for Chinese Patent Application No. 200710140455.3.5Office Action dated Dec. 15, 2009 for Korean Patent Application No. 10-2007-0081657.6Official Letter dated Apr. 29, 2009 for Korean Patent Application No. 10-2007-0081657. A concise statement of relevance is provided.7Tru-Flow� data sheet, Mass Flow Verifier, MKS Instruments, Inc., http://www.mksinst.com/docs/UR/massflotruflo.pdf, downloaded Nov. 16, 2007, copy consists of 4 pages. Sep. 2005.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS20130092269 *Sep 4, 2012Apr 18, 2013Ckd CorporationGas flow monitoring system* Cited by examinerClassifications U.S. Classification73/861.08, 205/157, 137/487.5, 427/248.1International ClassificationF16K11/24, C23C16/00, G01F1/56, C25D7/12Cooperative ClassificationG01F25/0038, G01F25/0053European ClassificationG01F25/00A8, G01F25/00A12Legal EventsDateCodeEventDescriptionSep 27, 2011CCCertificate of correctionJul 19, 2010ASAssignmentFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, JARED AHMAD;GOLD, EZRA ROBERT;ZHANG, CHUNLEI;AND OTHERS;SIGNING DATES FROM 20070808 TO 20070814;REEL/FRAME:024702/0457Owner name: APPLIED MATERIALS, INC., CALIFORNIARotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google