Patents by Inventor John Sheets

John Sheets 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: 20070068627
    Abstract: An apparatus and method are disclosed for measuring alignment of polysilicon shapes relative to a silicon area wherein the presence of an electrical coupling is used to determine the presence of bias or misalignment. Bridging vertices on the polysilicon shapes are formed. Bridging vertices over the silicon area create low resistance connections between those bridging vertices and the silicon area; other bridging vertices over ROX (recessed oxide) areas do not create low resistance connections between those other bridging vertices and the silicon area. Determining which bridging vertices have low resistance connections to the silicon area and how many bridging vertices have low resistance connections to the silicon area are used to determine the bias and misalignment of the polysilicon shapes relative to the silicon area.
    Type: Application
    Filed: November 15, 2006
    Publication date: March 29, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Richard Donze, Karl Erickson, William Hovis, John Sheets, Jon Tetzloff
  • Publication number: 20070072385
    Abstract: An apparatus and method are disclosed for measuring alignment of polysilicon shapes relative to a silicon area wherein the presence of an electrical coupling is used to determine the presence of bias or misalignment. Bridging vertices on the polysilicon shapes are formed. Bridging vertices over the silicon area create low resistance connections between those bridging vertices and the silicon area; other bridging vertices over ROX (recessed oxide) areas do not create low resistance connections between those other bridging vertices and the silicon area. Determining which bridging vertices have low resistance connections to the silicon area and how many bridging vertices have low resistance connections to the silicon area are used to determine the bias and misalignment of the polysilicon shapes relative to the silicon area.
    Type: Application
    Filed: November 15, 2006
    Publication date: March 29, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Richard Donze, Karl Erickson, William Hovis, John Sheets, Jon Tetzloff
  • Publication number: 20060091463
    Abstract: A FinFET body contact structure and a method for creating the FinFET body contact structure are disclosed. The body contact structure comprises a wide fin portion of a semiconductor fin, the wide fin portion having a polysilicon polygon shape formed on a top surface of the wide fin portion. The polysilicon polygon shape has a center area having no polysilicon. FinFETs are formed on two vertical surfaces of the wide fin portion and gates of the FinFETs are coupled to the polysilicon polygon shape. Top surfaces of the wide fin portion and the polysilicon polygon shape are silicided. Silicide bridging is prevented by sidewall spacers. All convex angles on the polysilicon polygon shape are obtuse enough to prevent creation of bridging vertices. The center area is doped of an opposite type from a source and a drain of an associated FinFET.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 4, 2006
    Applicant: International Business Machines Corporation
    Inventors: Richard Donze, Karl Erickson, William Hovis, Terrance Kueper, John Sheets, Jon Tetzloff
  • Publication number: 20060060926
    Abstract: An apparatus and method are disclosed for an improved semiconductor interconnect scheme using a simplified process. In an embodiment of the apparatus, a polysilicon shape is formed on a silicon area. The polysilicon shape is created having a bridging vertex. When a spacer is created on the polysilicon shape, the spacer width is formed to be small enough near the bridging vertex to allow a silicide bridge to form that creates an electrical coupling between the silicon area and the bridging vertex. Semiconductor devices and circuits are created using the improved semiconductor interconnect scheme using the simplified process.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Applicant: International Business Machines Corporation
    Inventors: Todd Christensen, Richard Donze, William Hovis, Terrance Kueper, John Sheets
  • Publication number: 20060063334
    Abstract: FinFET diode structures and methods are provided for building the FinFET diode structures. A FinFET diode structure is created by implanting a diffusion Fin on a first side with a P+ dopant and on a second side with a N+ dopant providing a P+N+ diode structure.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Applicant: International Business Machines Corporation
    Inventors: Richard Donze, Karl Erickson, William Hovis, John Sheets, Jon Tetzloff, Laura Zumbrunnen
  • Publication number: 20060063317
    Abstract: An apparatus and method is disclosed for determining polysilicon conductor width for 3-dimensional field effect transistors (FinFETs). Two or more resistors are constructed using a topology in which polysilicon conductors are formed over a plurality of silicon “fins”. A first resistor has a first line width. A second resistor has a second line width. The second line width is slightly different than the first line width. Advantageously, the first line width is equal to the nominal design width used to make FET gates in the particular semiconductor technology. Resistance measurements of the resistors and subsequent calculations using the resistance measurements are used to determine the actual polysilicon conductor width produced by the semiconductor process. A composite test structure not only allows calculation of the polysilicon conductor width, but provides proof that differences in the widths used in the calculations do not introduce objectionable etching characteristics of the polysilicon conductors.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Applicant: International Business Machines Corporation
    Inventors: Richard Donze, William Hovis, Terrance Kueper, John Sheets, Jon Tetzloff
  • Publication number: 20060060844
    Abstract: An apparatus and method are disclosed for measuring alignment of polysilicon shapes relative to a silicon area wherein the presence of an electrical coupling is used to determine the presence of bias or misalignment. Bridging vertices on the polysilicon shapes are formed. Bridging vertices over the silicon area create low resistance connections between those bridging vertices and the silicon area; other bridging vertices over ROX (recessed oxide) areas do not create low resistance connections between those other bridging vertices and the silicon area. Determining which bridging vertices have low resistance connections to the silicon area and how many bridging vertices have low resistance connections to the silicon area are used to determine the bias and misalignment of the polysilicon shapes relative to the silicon area.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Applicant: International Business Machines Corporation
    Inventors: Richard Donze, Karl Erickson, William Hovis, John Sheets, Jon Tetzloff
  • Publication number: 20050201188
    Abstract: An apparatus and method is disclosed for improving timing margins of logic paths on a semiconductor chip. Typical logic embodiments, such as CMOS (Complementary Metal Oxide Semiconductor), have path delays that become shorter as supply voltage is increased. Embodiments of the present invention store product data on each particular chip. The product data includes, for examples, but not limited to, a voltage range having a low limit voltage and a high limit voltage, a limit temperature, and performance of the particular chip in storage for the particular chip. Each chip has a voltage controller, a timer, and a thermal monitor. The voltage controller communicates with a voltage regulator and dynamically causes a voltage supply coupled to the chip to be as high as possible in the voltage range, subject to the limit temperature.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 15, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Richard Donze, William Hovis, Terrance Kueper, John Sheets, Jon Tetzloff
  • Publication number: 20050134360
    Abstract: Methods and apparatus are disclosed that allow an electronic system implemented with field effect transistors (FETs) to reduce threshold voltage shifts caused by bias temperature instability (BTI). BTI caused VT shifts accumulate when an FET is in a particular voltage stress condition. Many storage elements in an electronic system store the same data for virtually the life of the system, resulting in significant BTI caused VT shifts in FETs in the storage elements. An embodiment of the invention ensures that a particular storage element is in a first state for a first portion of time the electronic system operates, during which data is stored in a storage element in a first phase, and that the particular storage element is in a second state for a second portion of time the electronic system operates, during which data is stored in the storage element in a second phase.
    Type: Application
    Filed: December 23, 2003
    Publication date: June 23, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony Aipperspach, William Hovis, Terrance Kueper, John Sheets
  • Patent number: 5889306
    Abstract: A semiconductor device including a conductive substrate, an insulator layer, a silicon layer doped with impurities and forming a first transistor and a second transistor, an isolation volume between said first transistor and said second transistor, and a conductive stud extending from the doped silicon layer to the substrate.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: March 30, 1999
    Assignee: International Business Machines Corporation
    Inventors: Todd Alan Christensen, John Sheets