Patents by Inventor Kazuto Tajima

Kazuto Tajima 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).

  • Semiconductor device
    Patent number: 8115234
    Abstract: There is provided a technique for reducing the occurrence of higher harmonics which occur from a field effect transistor, particularly a field effect transistor configuring a switching element of an antenna switch. In a transistor having a meander structure, the gate width of a partial transistor closest to a gate input side is increased. More specifically, a comb-like electrode is made longer than the other comb-like electrodes. In other words, a finger length is made greater than any other finger length. In particular, the comb-like electrode has the greatest length in all the comb-like electrodes.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: February 14, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Akishige Nakajima, Yasushi Shigeno, Hitoshi Akamine, Tsutomu Kobori, Izumi Arai, Kazuto Tajima, Tomoyuki Ishikawa, Jyun Funaki
  • SEMICONDUCTOR DEVICE
    Publication number: 20100096667
    Abstract: There is provided a technique for reducing the occurrence of higher harmonics which occur from a field effect transistor, particularly a field effect transistor configuring a switching element of an antenna switch. In a transistor having a meander structure, the gate width of a partial transistor closest to a gate input side is increased. More specifically, a comb-like electrode is made longer than the other comb-like electrodes. In other words, a finger length is made greater than any other finger length. In particular, the comb-like electrode has the greatest length in all the comb-like electrodes.
    Type: Application
    Filed: September 23, 2009
    Publication date: April 22, 2010
    Applicant: RENESAS TECHNOLOGY CORP.
    Inventors: Akishige NAKAJIMA, Yasushi SHIGENO, Hitoshi AKAMINE, Tsutomu KOBORI, Izumi ARAI, Kazuto TAJIMA, Tomoyuki ISHIKAWA, Jyun FUNAKI