Patents by Inventor Michihisa Sanda

Michihisa Sanda 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).

  • Method of making hole in ceramic green sheet
    Patent number: 7102097
    Abstract: A ceramic green sheet is irradiated with a laser beam of a high-peak short-pulse type to form a hole in the sheet. With the laser beam, a minimum oscillation output is more than 60% of a maximum oscillation output. This prevents material of the ceramic green sheet from melting partially and remaining around the hole. Therefore, a multi-layer assembly of ceramic green sheets built by joining the sheets in layers and baking these joined sheets hardly has a structural defect around a via-electrode provided in the hole.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: September 5, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ryuichi Saito, Michihisa Sanda, Hidefumi Saeki, Hidenori Katsumura
  • Method of making hole in ceramic green sheet
    Publication number: 20040129689
    Abstract: A ceramic green sheet is irradiated with laser beam of high-peak short-pulse type to form a hole in the sheet. In the laser beam, the minimum oscillation output more than 60% of the maximum oscillation output. This prevents material of the ceramic green sheet from melting partially and remaining around the hole. Therefore, a multi-layer assembly of the ceramic green sheets built by joining the sheets in layers and baking the joined sheets hardly has a structural defect around a via-electrode provided in the hole.
    Type: Application
    Filed: October 21, 2003
    Publication date: July 8, 2004
    Inventors: Ryuichi Saito, Michihisa Sanda, Hidefumi Saeki, Hidenori Katsumura