Patents by Inventor Keith Hon Wong

Keith Hon Wong 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: 20070046392
    Abstract: A MEM switch is described having a free moving element within in micro-cavity, and guided by at least one inductive element. The switch consists of an upper inductive coil; an optional lower inductive coil, each having a metallic core preferably made of permalloy; a micro-cavity; and a free-moving switching element preferably also made of magnetic material. Switching is achieved by passing a current through the upper coil, inducing a magnetic field in the coil element. The magnetic field attracts the free-moving magnetic element upwards, shorting two open wires and thus, closing the switch. When the current flow stops or is reversed, the free-moving magnetic element drops back by gravity to the bottom of the micro-cavity and the wires open. When the chip is not mounted with the correct orientation, gravity cannot be used. In such an instance, a lower coil becomes necessary to pull the free-moving switching element back and holding it at its original position.
    Type: Application
    Filed: September 1, 2005
    Publication date: March 1, 2007
    Applicant: International Business Machines Corporation
    Inventors: Louis Hsu, Lowrence Clevenger, Timothy Dalton, Carl Radens, Keith Hon Wong, Chih-Chao Yang
  • Publication number: 20070023806
    Abstract: A magnetic random access memory (MRAM) device includes a magnetic tunnel junction (MTJ) stack formed over a lower wiring level, a hardmask formed on the MTJ stack, and an upper wiring level formed over the hardmask. The upper wiring level includes a slot via bitline formed therein, the slot via bitline in contact with the hardmask and in contact with an etch stop layer partially surrounding sidewalls of the hardmask.
    Type: Application
    Filed: July 29, 2005
    Publication date: February 1, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael Gaidis, Carl Radens, Lawrence Clevenger, Timothy Dalton, Louis Hsu, Keith Hon Wong, Chih-Chao Yang
  • Publication number: 20050128682
    Abstract: A method and apparatus for adjusting capacitance of an on-chip capacitor uses exposure of a dielectric material of the capacitor to an ion beam comprising ions of at least one material to modify a dielectric constant of the dielectric material.
    Type: Application
    Filed: January 26, 2005
    Publication date: June 16, 2005
    Inventors: Lawrence Clevenger, Timothy Dalton, Louis Hsu, Carl Radens, Keith Hon Wong, Chih-Chao Vang
  • Publication number: 20050070127
    Abstract: A method and apparatus for adjusting capacitance of an on-chip capacitor uses exposure of a dielectric material of the capacitor to an ion beam comprising ions of at least one material to modify a dielectric constant of the dielectric material.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventors: Lawrence Clevenger, Timothy Dalton, Louis Hsu, Carl Radens, Keith Hon Wong, Chih-Chao Yang