Patents by Inventor Tom Ritzdorf

Tom Ritzdorf 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).

  • Publication number: 20070068820
    Abstract: Processes and systems for electrolytically processing a microfeature workpiece with a first processing fluid and an anode are described. Microfeature workpieces are electrolytically processed using a first processing fluid, an anode, a second processing fluid, and an anion permeable barrier layer. The anion permeable barrier layer separates the first processing fluid from the second processing fluid while allowing certain anionic species to transfer between the two fluids. The described processes produce deposits over repeated plating cycles that exhibit resistivity values within desired ranges.
    Type: Application
    Filed: May 3, 2006
    Publication date: March 29, 2007
    Applicant: Semitool, Inc.
    Inventors: Rajesh Baskaran, Robert Batz, Bioh Kim, Tom Ritzdorf, John Klocke, Kyle Hanson
  • Publication number: 20060260946
    Abstract: Processes and systems for electrolytically processing a microfeature workpiece with a first processing fluid and an anode are described. Microfeature workpieces are electrolytically processed using a first processing fluid, an anode, a second processing fluid, and a cation permeable barrier layer. The cation permeable barrier layer separates the first processing fluid from the second processing fluid while allowing certain cationic species to transfer between the two fluids. The described processes produce deposits over repeated plating cycles that exhibit deposit properties (e.g., resistivity) within desired ranges.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 23, 2006
    Applicant: Semitool, Inc.
    Inventors: Rajesh Baskaran, Robert Batz, Bioh Kim, Tom Ritzdorf, John Klocke, Kyle Hanson
  • Publication number: 20060237323
    Abstract: Processes and systems for electrolytically processing a microfeature workpiece with a first processing fluid and an anode are described. Microfeature workpieces are electrolytically processed using a first processing fluid, an anode, a second processing fluid, and a cation permeable barrier layer. The cation permeable barrier layer separates the first processing fluid from the second processing fluid while allowing certain cationic species to transfer between the two fluids. The described processes produce deposits over repeated plating cycles that exhibit deposit properties (e.g., resistivity) within desired ranges.
    Type: Application
    Filed: April 28, 2006
    Publication date: October 26, 2006
    Applicant: Semitool, Inc.
    Inventors: Rajesh Baskaran, Robert Batz, Bioh Kim, Tom Ritzdorf, John Klocke, Kyle Hanson
  • Publication number: 20060189129
    Abstract: The methods described are directed to processes for producing structures containing metallized features for use in microelectronic workpieces. The processes treat a barrier layer to promote the adhesion between the barrier layer and the metallized feature. Suitable means for promoting adhesion between barrier layers and metallized features include an acid treatment of the barrier layer, an electrolytic treatment of the barrier layer, or deposition of a bonding layer between the barrier layer and metallized feature. The processes described modify an exterior surface of a barrier layer making it more suitable for electrodeposition of metal on a barrier, thus eliminating the need for a PVD or CVD seed layer deposition process. According to the processes described metallized features are formed on the treated barrier layers using processes that employ ion permeable barriers.
    Type: Application
    Filed: April 28, 2006
    Publication date: August 24, 2006
    Applicant: Semitool, Inc.
    Inventors: Rajesh Baskaran, Bioh Kim, Robert Batz, Tom Ritzdorf, John Klocke, Kyle Hanson
  • Publication number: 20060163072
    Abstract: Processes and systems for electrolytically processing a microfeature workpiece with a first processing fluid and an anode are described. Microfeature workpieces are electrolytically processed using a first processing fluid, an anode, a second processing fluid, and an anion permeable barrier layer. The anion permeable barrier layer separates the first processing fluid from the second processing fluid while allowing certain anionic species to transfer between the two fluids. The described processes produce deposits over repeated plating cycles that exhibit resistivity values within desired ranges.
    Type: Application
    Filed: December 7, 2005
    Publication date: July 27, 2006
    Applicant: Semitool, Inc.
    Inventors: Rajesh Baskaran, Robert Batz, Bioh Kim, Tom Ritzdorf, John Klocke, Kyle Hanson
  • Publication number: 20060157355
    Abstract: Processes and systems for electrolytically processing a microfeature workpiece with a first processing fluid and an anode are described. Microfeature workpieces are electrolytically processed using a first processing fluid, an anode, a second processing fluid, and an anion permeable barrier layer. The anion permeable barrier layer separates the first processing fluid from the second processing fluid while allowing certain anionic species to transfer between the two fluids. The described processes produce deposits over repeated plating cycles that exhibit resistivity values within desired ranges.
    Type: Application
    Filed: December 8, 2005
    Publication date: July 20, 2006
    Applicant: Semitool, Inc.
    Inventors: Rajesh Baskaran, Robert Batz, Bioh Kim, Tom Ritzdorf, John Klocke, Kyle Hanson
  • Publication number: 20060070638
    Abstract: A method for rinsing and drying a workpiece includes placing the workpiece into a chamber and spinning the workpiece. A rinsing fluid, such as water, is applied onto the workpiece through a first outlet in the chamber, with the rinsing fluid moving outwardly towards the edge of the workpiece via centrifugal force, to rinse the workpiece. A drying fluid, such as an alcohol vapor, is applied onto the workpiece through the first outlet, with the drying fluid moving outwardly towards the edge of the workpiece via centrifugal force, to dry the workpiece. The drying fluid advantageously follows a meniscus of the rinsing fluid across the workpiece surface. The rinsing fluid, or the drying fluid, or both fluids, may be applied near or at a central area of the workpiece.
    Type: Application
    Filed: December 2, 2005
    Publication date: April 6, 2006
    Inventors: Brian Aegerter, Curt Dundas, Tom Ritzdorf, Gary Curtis, Michael Jolley
  • Publication number: 20050233589
    Abstract: In a process for removing etch residue, liquid including an acid and an oxidizer is applied to the back side and peripheral edge of a wafer. The front or device side of the wafer is left unprocessed, or may be exposed to an inert fluid such as a purge gas (e.g., nitrogen or helium), to a rinse such as deionized water, or to another processing fluid such as a more highly diluted etchant. The front side of the wafer is either left unprocessed, or is processed to a lesser degree without damage to the underlying devices, metal interconnects or semiconductor layers.
    Type: Application
    Filed: June 14, 2005
    Publication date: October 20, 2005
    Inventors: Brian Aegerter, Curt Dundas, Tom Ritzdorf, Gary Curtis, Michael Jolley
  • Publication number: 20050217707
    Abstract: A processing fluid is selectively applied or excluded from an outer peripheral margin of the front side, back side, or both sides of a workpiece. Exclusion and/or application of the processing fluid occurs by applying one or more processing fluids to the workpiece as the workpiece is spinning. The flow rate of the one or more 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: Application
    Filed: May 21, 2005
    Publication date: October 6, 2005
    Inventors: Brian Aegerter, Curt Dundas, Tom Ritzdorf, Gary Curtis, Michael Jolley
  • Publication number: 20050020001
    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: Application
    Filed: August 25, 2004
    Publication date: January 27, 2005
    Inventors: Brian Aegerter, Curt Dundas, Michael Jolley, Tom Ritzdorf, Steven Peace, Gary Curtis, Raymon Thompson