Patents by Inventor Hiroshi Kadowaki

Hiroshi Kadowaki 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 and manufacturing method thereof for removing reaction products of dry etching
    Patent number: 6110834
    Abstract: Reaction products due to etching of a semiconductor sample by using a reactive gas are removed by using a liquid chemical that contains sulfuric acid and hydrofluoric acid at a volume mixing ratio of (5 to 7):(1/400 to 1/1000) and is kept at 25.degree.-70.degree. C. Reaction products and a resist mask are removed simultaneously by using a liquid chemical that contains sulfuric acid, a hydrogen peroxide solution, and hydrofluoric acid at a volume mixing ratio of (5 to 7):1:(1/400 to 1/1000) and is kept at 70.degree.-100.degree. C.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: August 29, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Ryoden Semiconductor System Engineering Corporation
    Inventors: Takatoshi Kinoshita, Hiroshi Kadowaki
  • Pneumatic radial tires with at least three tread radii of curvature
    Patent number: 5803998
    Abstract: A pneumatic radial tire having an excellent resistance to uneven wear is provided by optimizing a crown profile of a tread portion, in which at least a radial half section of the crown profile with respect to an equatorial plane of the tire is divided into center and middle and shoulder regions and comprised of a composite arc formed by smoothly connecting at least three arcs having different radii of curvature to each other and each of distances and radii of curvature of these regions satisfies a particular relation.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: September 8, 1998
    Assignee: Bridgestone Corporation
    Inventors: Yasuo Ohsawa, Hiroshi Kadowaki