Patents by Inventor Lee M. Loewenstein

Lee M. Loewenstein 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: 4875989
    Abstract: A processing apparatus and method for edge-preferential processing of partially fabricated integrated circuit wafers or of other substantially flat and thin workpieces. A plasma remote from the workpiece is used to generate activated species, and a baffle which is in proximity to the wafer face but not in contact with it is used to direct the stream of activated species. This module can be set up to perform both edge bead removal and bake of spun-on photoresist.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: October 24, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Robert T. Matthews, Lee M. Loewenstein, Joe V. Abernathy, Timothy A. Wooldridge
  • Patent number: 4872938
    Abstract: A process module which is compatible with a system using vacuum wafer transport in which wafers are generally transported and processed in a face down position under vacuum, and which also includes an additional wafer movement, wherein, after a wafer has been emplaced face down, in a position where it can be clamped against the susceptor, the susceptor is rotated from its approximately horizontal position up to a more nearly vertical position. In the more nearly vertical position, the wafer can be processed by a top process module, which may be, e.g., a sputter system, an implanter, or an inspection module. Another process module is included in the bottom part of the chamber, so that the wafer can be processed by the lower process module while in its substantially horizontal position and processed by the upper process module when it is in its more nearly vertical position. This is especially advantageous when the lower process module is a plasma cleanup module and the top module is a deposition module.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: October 10, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Joseph V. Abernathy, Robert T. Matthews, Randall C. Hildenbrand, Bruce Simpson, John I. Jones, Lee M. Loewenstein, James G. Bohlman
  • Patent number: 4867841
    Abstract: A process for etch of polysilicon films which utilizes the combination of remote and in situ plasma in a low pressure process module and the plasma is generated from a mixture of Helium and a source of Fluorine with the process chamber within the process module being generally at ambient temperatures.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: September 19, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Lee M. Loewenstein, Cecil J. Davis, Rhett B. Jucha
  • Patent number: 4857140
    Abstract: A process for etching silicon nitride which utilizes free radicals from a remote plasma generated using a fluorine containing gas; and hydrogen; to produce an etch which is selective to selected materials, for example, silicon and silicon dioxide.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 15, 1989
    Assignee: Texas Instruments Incorporated
    Inventor: Lee M. Loewenstein
  • Patent number: 4855016
    Abstract: A process for etch of Copper doped Aluminum films which utilizes the combination of remote and in situ plasma in a low pressure process module and the plasma is generated from a mixture of BCl.sub.3, Cl.sub.2, and a source of hydrocarbons with the process chamber within the process module being generally at ambient temperatures.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: August 8, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Rhett B. Jucha, Cecil J. Davis, Lee M. Loewenstein
  • Patent number: 4844773
    Abstract: A process for etch of polysilicon films which utilizes the combination of remote and in situ plasma in a low pressure process module and the plasma is generated form a mixture of a source of Fluorine and Helium with the process chamber within the process module being generally at ambient temperatures.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: July 4, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Lee M. Loewenstein, Cecil J. Davis
  • Patent number: 4842676
    Abstract: A process for etch of tungsten which utilizes both in situ and remote plasmas, and a gas mixture for the plasma which comprises SF.sub.6, HBr, and a source of hydrocarbons at low pressure and ambient temperature to product an etch which is both selective to silicon dioxide and photoresist and anisotropic.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: June 27, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Rhett B. Jucha, Cecil J. Davis, Lee M. Loewenstein
  • Patent number: 4842686
    Abstract: A plasma reactor with in situ ultraviolet generation processing aparatus and method. Ultraviolet light to illuminate the face of a wafer being processed is generated by a plasma which is within the vacuum processing chamber but is remote from the face of the wafer. It is useful to design the gas flow system so that the ultraviolet-generating plasma has its own gas feed, and the reaction products from the ultraviolet-generating plasma do not substantially flow or diffuse to the wafer face. A transparent isolator between the ultraviolet plasma space and the processing space near the wafer face is useful so that the ultraviolet plasma can be operated at a vacuum level slightly different from that used near the wafer face, but this transparent window is not made thick enough to act as a full vacuum seal. Optionally, this window may be omitted entirely.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: June 27, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Lee M. Loewenstein, Robert T. Matthews, John I. Jones, Rhett B. Jucha
  • Patent number: 4838984
    Abstract: A film of mercury-cadmium-telluride (HgCdTe) or zinc sulfide (ZnS) is anisotropically etched utilizing a remote plasma and an in situ plasma utilizing a gas mixture which includes a hydrogen containing and/or an alkyl bearing gas providing an anisotropic etch.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: June 13, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Joseph D. Luttmer, Cecil J. Davis, Patricia B. Smith, Rudy L. York, Lee M. Loewenstein, Rhett B. Jucha
  • Patent number: 4836905
    Abstract: A processing apparatus and method which permits sputter deposition and which is compatible with a vacuum processing system wherein the wafers are largely transferred and processed in the face down position. This includes an additional wafer movement, wherein, after a wafer has been emplaced face down, in a position where it can be clamped against the susceptor, the susceptor is rotated from its approximately horizontal position up to a more nearly vertical position. While the wafer is in the more nearly vertical position, sputter deposition may be performed. In situ or remote plasma capability is usefully provided in the bottom part of the chamber, so that a dry deglaze or cleanup step can be performed while the wafer is in its substantially horizontal position, followed by a sputter deposition after the wafer has been moved to its more nearly vertical position.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: June 6, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Joseph V. Abernathy, Robert T. Matthews, Randall C. Hildenbrand, Bruce Simpson, James G. Bohlman, Lee M. Loewenstein, John I. Jones
  • Patent number: 4830705
    Abstract: A process for etch of GaAs wafers which utilizes the combination of remote and in situ plasma in a low pressure process module and the plasma is generated from a mixture of Helium, CH.sub.4 ; and one of a group of CF.sub.4 or F.sub.2 with the process chamber within the process module being generally at ambient temperatures.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: May 16, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Lee M. Loewenstein, Cecil J. Davis
  • Patent number: 4828649
    Abstract: A process for etch of Silicon doped Aluminum films which utilizes the combination of remote and in situ plasma in a low pressure process module and the plasma is generated from a mixture of Helium, BCl.sub.3, and Cl.sub.2, and with the process chamber within the process module being generally at ambient temperatures.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: May 9, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Lee M. Loewenstein, Rhett B. Jucha
  • Patent number: 4822450
    Abstract: A processing apparatus and method compatible with a vacuum process system for wafers, wherein an in situ source of ultraviolet light is provided to enhance chemical activity at the wafer surface, and a remote plasma source is provided in the process gas flow upstream of the wafer, to provide activated species to the wafer face, and a radiatively coupled heat source is also provided so that the wafer can be rapidly thermally cycled.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: April 18, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Lee M. Loewenstein, Rhett B. Jucha, Robert T. Matthews, Randall C. Hildenbrand, Dean W. Freeman, John I. Jones
  • Patent number: 4820378
    Abstract: A process for etching silicon nitride which is selective to silicon oxide with a vacuum processing module which has a remote plasma, which is generated form a gas including He and SF.sub.6, introduced to the wafer face.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: April 11, 1989
    Assignee: Texas Instruments Incorporated
    Inventor: Lee M. Loewenstein
  • Patent number: 4820377
    Abstract: A process module having remote plasma and in situ plasma generators, and a radiant heater, which represent three separate energy sources. The three sources can be used singly or in any combination and can be separately controllable.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: April 11, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Cecil J. Davis, Robert T. Matthews, Rhett B. Jucha, Lee M. Loewenstein
  • Patent number: 4818326
    Abstract: A processing apparatus and method for providing a process module with a low pressure, low energy ion implanter and a remote microwave plasma generator and a source of thermal energy, which is adapted to receive wafers for processing in a low pressure carrier.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: April 4, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Jiann Liu, Cecil J. Davis, Lee M. Loewenstein