Patents by Inventor Christopher Sheraw

Christopher Sheraw 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: 10566328
    Abstract: One illustrative integrated circuit product disclosed herein includes a plurality of FinFET transistor devices, a plurality of fins, each of the fins having an upper surface, and an elevated isolation structure having an upper surface that is positioned at a level that is above a level of the upper surface of the fins. In this example, the product also includes a first gate structure having an axial length in a direction corresponding to the gate width direction of the transistor devices, wherein at least a portion of the axial length of the first gate structure is positioned above the upper surface of the elevated isolation structure.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: February 18, 2020
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Bala Haran, Christopher Sheraw, Mahender Kumar
  • Publication number: 20190267371
    Abstract: One illustrative integrated circuit product disclosed herein includes a plurality of FinFET transistor devices, a plurality of fins, each of the fins having an upper surface, and an elevated isolation structure having an upper surface that is positioned at a level that is above a level of the upper surface of the fins. In this example, the product also includes a first gate structure having an axial length in a direction corresponding to the gate width direction of the transistor devices, wherein at least a portion of the axial length of the first gate structure is positioned above the upper surface of the elevated isolation structure.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 29, 2019
    Inventors: Bala Haran, Christopher Sheraw, Mahender Kumar
  • Publication number: 20080096342
    Abstract: The present invention relates to complementary metal-oxide-semiconductor (CMOS) circuits, as well as methods for forming such CMOS circuits. More specifically, the present invention relates to CMOS circuits that contain passive elements, such as buried resistors, capacitors, diodes, inductors, attenuators, power dividers, and antennas, etc., which are characterized by an end contact resistance of less than 90 ohm-microns. Such a low end resistance can be achieved either by reducing the spacer widths of the passive elements to a range of from about 10 nm to about 30 nm, or by masking the passive elements during a pre-amorphization implantation step, so that the passive elements are essentially free of pre-amorphization implants.
    Type: Application
    Filed: December 14, 2007
    Publication date: April 24, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Christopher Sheraw, Alyssa Bonnoit, K. Muller, Werner Rausch
  • Publication number: 20070120195
    Abstract: The present invention relates to complementary metal-oxide-semiconductor (CMOS) circuits, as well as methods for forming such CMOS circuits. More specifically, the present invention relates to CMOS circuits that contain passive elements, such as buried resistors, capacitors, diodes, inductors, attenuators, power dividers, and antennas, etc., which are characterized by an end contact resistance of less than 90 ohm-microns. Such a low end resistance can be achieved either by reducing the spacer widths of the passive elements to a range of from about 10 nm to about 30 nm, or by masking the passive elements during a pre-amorphization implantation step, so that the passive elements are essentially free of pre-amorphization implants.
    Type: Application
    Filed: November 28, 2005
    Publication date: May 31, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Christopher Sheraw, Alyssa Bonnoit, K. Muller, Werner Rausch
  • Publication number: 20060263993
    Abstract: The present invention provides a “subcollector-less” silicon-on-insulator (SOI) bipolar junction transistor (BJT) that has no impurity-doped subcollector. Instead, the inventive vertical SOI BJT uses a back gate-induced, majority carrier accumulation layer as the subcollector when it operates. The SOI substrate is biased such that the accumulation layer is formed at the bottom of the first semiconductor layer. The advantage of such a device is its CMOS-like process. Therefore, the integration scheme can be simplified and the manufacturing cost can be significantly reduced. The present invention also provides a method of fabricating BJTs on selected areas of a very thin BOX using a conventional SOI starting wafer with a thick BOX. The reduced BOX thickness underneath the bipolar devices allows for a significantly reduced substrate bias compatible with the CMOS to be applied while maintaining the advantages of a thick BOX underneath the CMOS. A back-gated CMOS device is also provided.
    Type: Application
    Filed: July 20, 2006
    Publication date: November 23, 2006
    Applicant: International Business Machines Corporation
    Inventors: Herbert Ho, Mahender Kumar, Qiqing Ouyang, Paul Papworth, Christopher Sheraw, Michael Steigerwalt
  • Publication number: 20060180868
    Abstract: A device is provided which includes a single-crystal semiconductor region disposed in a substrate. The single-crystal region includes a first semiconductor material and a diode disposed in the single-crystal region. The diode includes an anode region including a first alloy region, being an alloy of the first semiconductor material with a second semiconductor material, and a second region which consists essentially of the first semiconductor material, the diode further including a cathode region.
    Type: Application
    Filed: February 16, 2005
    Publication date: August 17, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Edward Maciejewski, Sherry Womack, Shreesh Narasimha, Christopher Sheraw
  • Publication number: 20060043530
    Abstract: The present invention provides a “subcollector-less” silicon-on-insulator (SOI) bipolar junction transistor (BJT) that has no impurity-doped subcollector. Instead, the inventive vertical SOI BJT uses a back gate-induced, majority carrier accumulation layer as the subcollector when it operates. The SOI substrate is biased such that the accumulation layer is formed at the bottom of the first semiconductor layer. The advantage of such a device is its CMOS-like process. Therefore, the integration scheme can be simplified and the manufacturing cost can be significantly reduced. The present invention also provides a method of fabricating BJTs on selected areas of a very thin BOX using a conventional SOI starting wafer with a thick BOX. The reduced BOX thickness underneath the bipolar devices allows for a significantly reduced substrate bias compatible with the CMOS to be applied while maintaining the advantages of a thick BOX underneath the CMOS. A back-gated CMOS device is also provided.
    Type: Application
    Filed: September 1, 2004
    Publication date: March 2, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Herbert Ho, Mahender Kumar, Qiqing Ouyang, Paul Papworth, Christopher Sheraw, Michael Steigerwalt
  • Publication number: 20050184360
    Abstract: The present invention provides a “collector-less” silicon-on-insulator (SOI) bipolar junction transistor (BJT) that has no impurity-doped collector. Instead, the inventive vertical SOI BJT uses a back gate-induced, minority carrier inversion layer as the intrinsic collector when it operates. In accordance with the present invention, the SOI substrate is biased such that an inversion layer is formed at the bottom of the base region serving as the collector. The advantage of such a device is its CMOS-like process. Therefore, the integration scheme can be simplified and the manufacturing cost can be significantly reduced. The present invention also provides a method of fabricating BJTs on selected areas of a very thin BOX using a conventional SOI starting wafer with a thick BOX. The reduced BOX thickness underneath the bipolar devices allows for a significantly reduced substrate bias compatible with the CMOS to be applied while maintaining the advantages of a thick BOX underneath the CMOS.
    Type: Application
    Filed: February 25, 2004
    Publication date: August 25, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Herbert Ho, Mahender Kumar, Qiqing Ouyang, Paul Papworth, Christopher Sheraw, Michael Steigerwalt