Patents Represented by Law Firm Sughreu, Mion, Zinn, Macpeak and Seas
  • Method and device of testing semiconductor integrated circuit chip capable of preventing electron-hole pairs
    Patent number: 6072327
    Abstract: While an ultrasonic wave beam producing device scans an ultrasonic wave beam 5 across a semiconductor integrated circuit chip 2, a current through the circuit chip is detected. In this way, the semiconductor integrated circuit chip may be accurately tested, and the creation of electron-hole pairs is avoided.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: June 6, 2000
    Assignee: NEC Corporation
    Inventor: Kiyoshi Nikawa
  • Magnetic recording medium
    Patent number: 4510203
    Abstract: A magnetic recording medium is disclosed which is comprised of a non-magnetic support having thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder. The binder is comprised of a copolymer of vinyl chloride-vinyl acetate-vinyl alcohol and a copolymer of ethylene-vinyl acetate which is graft-polymerized with vinyl chloride and, optionally, a polyisocyanate. The recording medium has excellent electromagnetic properties, running properties and durability.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: April 9, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Ogawa, Chiaki Mizuno, Yasuo Tamai