Patents by Inventor Gary L. Curtis

Gary L. Curtis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6447633
    Abstract: A method for processing a semiconductor wafer or similar article includes the step of spinning the wafer and applying a fluid to a first side of the wafer, while it is spinning. The fluid flows radially outwardly in all directions, over the first side of the wafer, via centrifugal force. As the fluid flows off of the circumferential edge of the wafer, it is contained in an annular reservoir, so that the fluid also flows onto an outer annular area of the second side of the wafer. An opening allows fluid to flow out of the reservoir. The opening defines the location of a parting line beyond which the fluid will not travel on the second side of the wafer. An apparatus for processing a semiconductor wafer or similar article includes a reactor having a processing chamber formed by upper and lower rotors. The wafer is supported between the rotors. The rotors are rotated by a spin motor. A processing fluid is introduced onto the top or bottom surface of the wafer, or onto both surfaces, at a central location.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: September 10, 2002
    Assignee: Semitdol, Inc.
    Inventors: Steven L. Peace, Gary L. Curtis, Raymon F. Thompson, Brian Aegerter, Curt T. Dundas
  • Patent number: 6447232
    Abstract: A processor for processing articles, such as semiconductor wafers, in a substantially clean atmosphere is set forth. The processor includes an enclosure defining a substantially enclosed clean processing chamber and at least one processing station disposed in the processing chamber. An interface section is disposed adjacent an interface end of the enclosure. The interface section includes at least one interface port through which a pod containing articles for processing are loaded or unloaded to or from the processor. The interface section is hygienically separated from the processing chamber since the interface section is generally not as clean as the highly hygienic processing chamber. An article extraction mechanism adapted to seal with the pod is employed. The mechanism is disposed to allow extraction of the articles contained within the pod into the processing chamber without exposing the articles to ambient atmospheric conditions in the interface section.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: September 10, 2002
    Assignee: Semitool, Inc.
    Inventors: Jeffry A. Davis, Kert L. Dolechek, Gary L. Curtis
  • Patent number: 6446643
    Abstract: In a method for rinsing and drying a semiconductor workpiece in a micro-environment, the workpiece is placed into a rinser/dryer housing. The rinser/dryer housing is rotated by a rotor motor. The rinser/dryer housing defines a substantially closed rinser/dryer chamber. Rinsing and drying fluids are distributed across at least one face of the semiconductor workpiece by the action of centrifugal force generated during rotation of the housing. A fluid supply system is connected to sequentially supply a rinsing fluid followed by a drying fluid to the chamber as the housing is rotated.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: September 10, 2002
    Assignee: Semitool, Inc.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Patent number: 6423642
    Abstract: A method for processing a semiconductor wafer or similar article includes the step of spinning the wafer and applying a fluid to a first side of the wafer, while it is spinning. The fluid flows radially outwardly in all directions, over the first side of the wafer, via centrifugal force. As the fluid flows off of the circumferential edge of the wafer, it is contained in an annular reservoir, so that the fluid also flows onto an outer annular area of the second side of the wafer. An opening allows fluid to flow out of the reservoir. The opening defines the location of a parting line beyond which the fluid will not travel on the second side of the wafer. An apparatus for processing a semiconductor wafer or similar article includes a reactor having a processing chamber formed by upper and lower rotors. The wafer is supported between the rotors. The rotors are rotated by a spin motor. A processing fluid is introduced onto the top or bottom surface of the wafer, or onto both surfaces, at a central location.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: July 23, 2002
    Assignee: Semitool, Inc.
    Inventors: Steven L. Peace, Gary L. Curtis, Raymon F. Thompson, Brian Aegerter, Curt T. Dundas
  • Patent number: 6413436
    Abstract: In a process for treating a workpiece such as a semiconductor wafer, a processing fluid is selectively applied or excluded from an outer peripheral margin of at least one of the front or back sides of the workpiece. Exclusion and/or application of the processing fluid occurs by applying one or more processing fluids to the workpiece while the workpiece and a reactor holding the workpiece are spinning. The flow rate of the processing fluids, fluid pressure, and/or spin rate are used to control the extent to which the processing fluid is selectively applied or excluded from the outer peripheral margin.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: July 2, 2002
    Assignee: Semitool, Inc.
    Inventors: Brian Aegerter, Curt T. Dundas, Michael Jolley, Tom L. Ritzdorf, Steven L. Peace, Gary L. Curtis, Raymon F. Thompson
  • Patent number: 6395101
    Abstract: In a method of processing or drying a semiconductor wafer, the wafer is withdrawn from a fluid bath at an inclined angle, and at a selected withdrawal speed. A solvent vapor is provided at the surface of the bath, to create a surface tension gradient and promote drying, or removal of the fluid from the wafer surface. After the wafer is entirely withdrawn from the rinsing liquid, the wafer is rotated briefly, to remove any remaining fluid via centrifugal force, without the fluid drying on the wafer. The wafer is held onto a rotor assembly which rotates the wafer within an enclosed chamber, and which is also pivoted within the chamber, to position the wafer at the incline angle.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: May 28, 2002
    Assignee: Semitool, Inc.
    Inventors: Dana Scranton, Gary L. Curtis
  • Patent number: 6374837
    Abstract: An apparatus for processing or drying a semiconductor wafer includes a rotor for holding a wafer and for spinning the wafer about a first axis. A pivot arm supports the rotor, so that the rotor can pivot about a second axis that is substantially perpendicular to the first axis. A basin holding a processing fluid is located below the rotor, with the rotor vertically movable into and out of the processing fluid via an elevator supporting the pivot arm. The rotor is pivotable into a position where it holds the wafer at an inclined angle so that the wafer may be withdrawn from the processing fluid at said inclined angle to facilitate drying of the wafer.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: April 23, 2002
    Assignee: Semitool, Inc.
    Inventors: Dana Scranton, Gary L. Curtis
  • Publication number: 20020023717
    Abstract: An apparatus for processing a workpiece in a micro-environment includes a workpiece housing connected to a motor for rotation. The workpiece housing forms a substantially closed processing chamber where one or more processing fluids are distributed across at least one face of the workpiece by centrifugal force generated during rotation of the housing. Multiple housings may be vertically stacked and rotated about a common rotation axis to simultaneously process multiple workpieces in a small space.
    Type: Application
    Filed: August 2, 2001
    Publication date: February 28, 2002
    Applicant: SEMITOOL, INC.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Patent number: 6350319
    Abstract: An apparatus for processing a workpiece in a micro-environment is set forth. The apparatus includes a rotor motor and a workpiece housing. The workpiece housing is connected to be rotated by the rotor motor. The workpiece housing further defines a substantially closed processing chamber therein in which one or more processing fluids are distributed across at least one face of the workpiece by centripetal acceleration generated during rotation of the housing.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: February 26, 2002
    Assignee: Semitool, Inc.
    Inventors: Gary L Curtis, Raymon F. Thompson
  • Publication number: 20010053411
    Abstract: An apparatus for processing a workpiece in a micro-environment includes a workpiece housing connected to a motor for rotation. The workpiece housing forms a substantially closed processing chamber where processing fluids are distributed across at least one face of the workpiece by centrifugal force generated during rotation of the housing. The housing may also be detached from the motor and moved to another location. The housing consequently serves as a processing chamber, as well as a storage or transport chamber.
    Type: Application
    Filed: August 2, 2001
    Publication date: December 20, 2001
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Publication number: 20010050060
    Abstract: An apparatus for processing a workpiece in a micro-environment includes a workpiece housing connected to be rotated by a motor. The workpiece housing forms a substantially closed processing chamber where one or more processing fluids are distributed across at least one face of the workpiece by centrifugal force generated during rotation of the housing. A sump is connected to an inlet and an outlet in the chamber. Rotation of the workpiece housing recirculates fluid into the chamber.
    Type: Application
    Filed: August 2, 2001
    Publication date: December 13, 2001
    Applicant: SEMITOOL, INC.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Publication number: 20010047752
    Abstract: An apparatus for processing a workpiece in a micro-environment includes a workpiece housing connected to a motor for rotation. The workpiece housing forms a processing chamber where one or more processing fluids are distributed across at least one face of the workpiece by centrifugal force generated during rotation of the housing. An array of workpiece housings are contained within an enclosure. A robot moves workpieces into and out of the workpiece housings.
    Type: Application
    Filed: August 2, 2001
    Publication date: December 6, 2001
    Applicant: SEMITOOL, INC.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Publication number: 20010047757
    Abstract: An apparatus for processing a workpiece in a micro-environment includes a workpiece housing connected to a motor for rotation. The workpiece housing defines a substantially closed processing chamber therein in which one or more processing fluids are distributed across at least one face of the workpiece by centrifugal force generated during rotation of the housing. A dividing member at the edge of the spinning workpiece separates flow of fluids off of the top and bottom surfaces of the workpiece.
    Type: Application
    Filed: August 2, 2001
    Publication date: December 6, 2001
    Applicant: SEMITOOL, INC.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Patent number: 6318385
    Abstract: An apparatus for rinsing and drying a semiconductor workpiece in a micro-environment is set forth. The apparatus includes a rotor motor and a rinser/dryer housing. The rinser/dryer housing is connected to be rotated by the rotor motor. The rinser/dryer housing further defines a substantially closed rinser/dryer chamber therein in which rinsing and drying fluids are distributed across at least one face of the semiconductor workpiece by the action of centripetal acceleration generated during rotation of the housing. A fluid supply system is connected to sequentially supply a rinsing fluid followed by a drying fluid to the chamber as the housing is rotated.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: November 20, 2001
    Assignee: Semitool, Inc.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Publication number: 20010032660
    Abstract: In a method for rinsing and drying a semiconductor workpiece in a micro-environment, the workpiece is placed into a rinser/dryer housing. The rinser/dryer housing is rotated by a rotor motor. The rinser/dryer housing defines a substantially closed rinser/dryer chamber. Rinsing and drying fluids are distributed across at least one face of the semiconductor workpiece by the action of centrifugal force generated during rotation of the housing. A fluid supply system is connected to sequentially supply a rinsing fluid followed by a drying fluid to the chamber as the housing is rotated.
    Type: Application
    Filed: June 12, 2001
    Publication date: October 25, 2001
    Applicant: SEMITOOL, INC.
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Publication number: 20010020482
    Abstract: In a method of processing or drying a semiconductor wafer, the wafer is withdrawn from a fluid bath at an inclined angle, and at a selected withdrawal speed. A solvent vapor is provided at the surface of the bath, to create a surface tension gradient and promote drying, or removal of the fluid from the wafer surface. After the wafer is entirely withdrawn from the rinsing liquid, the wafer is rotated briefly, to remove any remaining fluid via centrifugal force, without the fluid drying on the wafer. The wafer is held onto a rotor assembly which rotates the wafer within an enclosed chamber, and which is also pivoted within the chamber, to position the wafer at the incline angle.
    Type: Application
    Filed: May 17, 2001
    Publication date: September 13, 2001
    Applicant: SEMITOOL, INC.
    Inventors: Dana Scranton, Gary L. Curtis
  • Publication number: 20010015176
    Abstract: An apparatus for processing a microelectronic workpiece in a micro-environment is set forth. The apparatus includes a first chamber member having an interior chamber wall and a second chamber member having an interior chamber wall. The first and second chamber members are adapted for relative movement between a loading position in which the first and second chamber members are distal one another and a processing position in which the first and second chamber members are proximate one another to define a processing chamber. At least one workpiece support assembly is disposed between the first and second chamber members for supporting the microelectronic workpiece.
    Type: Application
    Filed: April 30, 2001
    Publication date: August 23, 2001
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Patent number: 6264752
    Abstract: An apparatus for processing a microelectronic workpiece in a micro-environment is set forth. The apparatus includes a first chamber member having an interior chamber wall and a second chamber member having an interior chamber wall. The first and second chamber members are adapted for relative movement between a loading position in which the first and second chamber members are distal one another and a processing position in which the first and second chamber members are proximate one another to define a processing chamber. At least one workpiece support assembly is disposed between the first and second chamber members for supporting the microelectronic workpiece.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: July 24, 2001
    Inventors: Gary L. Curtis, Raymon F. Thompson
  • Patent number: 6014817
    Abstract: A processor for processing integrated circuit wafers, semiconductor substrates, data disks and similar units requiring very low contamination levels. The processor has an interface section which receives wafers in standard wafer carriers. The interface section transfers the wafers from carriers onto novel trays for improved processing. The interface unit can hold multiple groups of multiple trays. A conveyor having an automated arm assembly moves wafers supported on a tray. The conveyor moves the trays from the interface along a track to several processing stations. The processing stations are accessed from an enclosed area adjoining the interface section.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: January 18, 2000
    Assignee: Semitool, Inc.
    Inventors: Raymon F. Thompson, Robert W. Berner, Gary L. Curtis, Stephen P. Culliton, Blaine G. Wright
  • Patent number: 5996241
    Abstract: A processor for processing integrated circuit wafers, semiconductor substrates, data disks and similar units requiring very low contamination levels. The processor has an interface section which receives wafers in standard wafer carriers. The interface section transfers the wafers from carriers onto novel trays for improved processing. The interface unit can hold multiple groups of multiple trays. A conveyor having an automated arm assembly moves wafers supported on a tray. The conveyor moves the trays from the interface along a track to several processing stations. The processing stations are accessed from an enclosed area adjoining the interface section.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: December 7, 1999
    Assignee: Semitool, Inc.
    Inventors: Raymon F. Thompson, Robert W. Berner, Gary L. Curtis, Stephen P. Culliton, Blaine G. Wright