Patents by Inventor Tadayasu Ohsawa

Tadayasu Ohsawa 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).

  • Patent number: 6325865
    Abstract: A method for drying a substrate after the substrate is rinsed in a rinsing bath in which a rinsing liquid is contained. The substrate is vertically held selectively by first and second holders. The second holder is located between and below the first holders. Each of the first and second holders includes grooves with which the substrate is engageable. When the level of the rinsing liquid downwardly passes past the grooves of the first holders, the substrate is held solely by the second holder. Then, when the level of the rinsing liquid downwardly passes past the grooves of the second holder, the substrate is held solely by the first holder.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: December 4, 2001
    Assignee: Kaijo Corporation
    Inventors: Tadayasu Ohsawa, Hiromitsu Kurauchi
  • Patent number: 6244281
    Abstract: A method and apparatus for drying a substrate after the substrate is rinsed in a rinsing bath in which a rinsing liquid is contained. The substrate is vertically held selectively by first and second holders. The second holder is located between and below the first holders. Each of the first and second holders includes grooves with which the substrate is engageable. When the level of the rinsing liquid downwardly passes past the grooves of the first holders, the substrate is held solely by the second holder. Then, when the level of the rinsing liquid downwardly passes past the grooves of the second holder, the substrate is held solely by the first holder.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: June 12, 2001
    Assignee: Kaijo Corporation
    Inventors: Tadayasu Ohsawa, Hiromitsu Kurauchi
  • Publication number: 20010001393
    Abstract: A method and apparatus for drying a substrate after the substrate is rinsed in a rinsing bath in which a rinsing liquid is contained. The substrate is vertically held selectively by first and second holders. The second holder is located between and below the first holders. Each of the first and second holders includes grooves with which the substrate is engageable. When the level of the rinsing liquid downwardly passes past the grooves of the first holders, the substrate is held solely by the second holder. Then, when the level of the rinsing liquid downwardly passes past the grooves of the second holder, the substrate is held solely by the first holder.
    Type: Application
    Filed: January 23, 2001
    Publication date: May 24, 2001
    Inventors: Tadayasu Ohsawa, Hiromitsu Kurauchi
  • Patent number: 5853284
    Abstract: A notched wafer aligning apparatus capable of aligning a number of notched wafers received in a cassette with each other at a predetermined position and facilitating shifting of the thus-aligned wafers to any desired position. A plurality of notch detection rollers are rotatably arranged in juxtaposition to each other on a rotation drive shaft so as to be rotated while being abutted against a lower portion of peripheral edges of the wafers through a lower open end of the cassette. The notch detection rollers are individually rotated due to friction between the notch detection rollers and the rotation drive shaft.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: December 29, 1998
    Assignee: Kaijo Corporation
    Inventors: Ryo Ohzeki, Tadayasu Ohsawa