Patents by Inventor Zenpei Kawazu

Zenpei Kawazu 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).

  • Infrared detector having active regions and isolating regions formed of CdHgTe
    Patent number: 5602414
    Abstract: In a method for fabricating an infrared detector, initially, a CdHgTe layer of a first conductivity type is produced on a front surface of a semiconductor substrate, a plurality of spaced apart CdHgTe regions of a second conductivity type, opposite the first conductivity type, are produced at the surface of the first conductivity type CdHgTe layer, and part of the surface of the first conductivity type CdHgTe layer between the second conductivity type CdHgTe regions is selectively irradiated with a charged particle beam to evaporate Hg atoms from that part, whereby a CdHgTe separation region of the first conductivity type and having a Cd composition larger than that of the first conductivity type CdHgTe layer is produced penetrating through the first conductivity type CdHgTe layer and surrounding each of the second conductivity type CdHgTe regions. Therefore, a highly-integrated high-resolution infrared detector with no crosstalk between pixels is achieved.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: February 11, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kotaro Mitsui, Zenpei Kawazu, Kazuo Mizuguchi, Seiji Ochi, Yuji Ohkura, Norio Hayafuji, Hirotaka Kizuki, Mari Tsugami, Akihiro Takami, Manabu Katoh