Patents by Inventor Subhadra Gupta

Subhadra Gupta 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: 7101466
    Abstract: A sweeping linear magnetron is described. The magnetron has a cathode backing plate, a drive housing attached to the cathode backing plate and a motor held in the drive housing. The motor drives a yoke positioned within a cut-out in the backing plate. The yoke has a magnet pack attached thereto said yoke such that the magnet pack is adapted to being moved over a target material and wherein the target material is being sputtered within a vacuum chamber onto a substrate.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: September 5, 2006
    Assignee: KDF Electronic + Vacuum Services Inc
    Inventors: Subhadra Gupta, Andrew Ruspini
  • Publication number: 20060157344
    Abstract: A sweeping linear magnetron is described. The magnetron has a cathode backing plate, a drive housing attached to the cathode backing plate and a motor held in the drive housing. The motor drives a yoke positioned within a cut-out in the backing plate. The yoke has a magnet pack attached thereto said yoke such that the magnet pack is adapted to being moved over a target material and wherein the target material is being sputtered within a vacuum chamber onto a substrate.
    Type: Application
    Filed: December 22, 2005
    Publication date: July 20, 2006
    Inventors: Subhadra Gupta, Andrew Ruspini
  • Publication number: 20050061666
    Abstract: A sweeping linear magnetron is described. The magnetron has a cathode backing plate, a drive housing attached to the cathode backing plate and a motor held in the drive housing. The motor drives a yoke positioned within a cut-out in the backing plate. The yoke has a magnet pack attached thereto said yoke such that the magnet pack is adapted to being moved over a target material and wherein the target material is being sputtered within a vacuum chamber onto a substrate.
    Type: Application
    Filed: September 19, 2003
    Publication date: March 24, 2005
    Inventors: Subhadra Gupta, Andrew Ruspini
  • Patent number: 6537428
    Abstract: A method and apparatus for monitoring and controlling reactive sputter deposition, particularly useful for depositing insulating compounds (e.g., metal-oxides, metal-nitrides, etc.). For a given nominal cathode power level, target material, and source gases, the power supplied to the cathode (target) is controlled to stabilize the cathode (target) voltage at a specified value or within a specified range corresponding to a partial pressure or relative flow rate value or range of the reactive gas. Such an operating point or range, characterized by a specified voltage value or range and corresponding reactive gas relative-flow/partial-pressure value or range, may be determined empirically based on measuring the cathode voltage as a function of reactive gas relative-flow/partial-pressure for the given nominal power.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: March 25, 2003
    Assignee: Veeco Instruments, Inc.
    Inventors: Wei Xiong, Subhadra Gupta
  • Patent number: 5958134
    Abstract: Method and apparatus for forming the longitudinal edges of stacks of razor blades by conveying the stacks of razor blades along a conveying path in a vacuum chamber past material deposition and material etching stations. The material etching stations are mounted in the sides of the vacuum chamber to be directed generally toward the edge sides of the edges of the razor blades. In another embodiment, stacks of razor blades are mounted on opposite sides of a rotating pallet and material deposition and etching stations are mounted in both side walls of the vacuum chamber. A DC or RF bias is applied to the stacks of razor blades by capacitively coupling the RF bias or conducting by electrical contacts a DC or RF bias to a central portion of the rotating pallet.
    Type: Grant
    Filed: December 4, 1995
    Date of Patent: September 28, 1999
    Assignee: Tokyo Electron Limited
    Inventors: Tugrul Yasar, Ira Reiss, Subhadra Gupta, Rajendrapura Seetharamaiya Krishnaswamy, Israel Wagner