Patents by Inventor Takeichi Tsudaka

Takeichi Tsudaka 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).

  • Metal laminate for a circuit board
    Patent number: 6616796
    Abstract: A method of producing a metal laminate for a circuit board includes a first step of press-bonding a thermotropic liquid crystal polymer film 1 having a segment orientation ratio SOR within a range not smaller than 0.90 and smaller than 1.15 along the longitudinal direction of the film, to a metal sheet 3 between hot rolls while the thermotropic liquid crystal polymer film 1 is in a tense or non-tense state; and a second step of heating the laminate obtained in the first step to a temperature not lower than the melting point of the thermotropic liquid crystal polymer film.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: September 9, 2003
    Assignee: Kuraray Co., Ltd.
    Inventors: Minoru Onodera, Tadao Yoshikawa, Takeichi Tsudaka, Toshiaki Sato
  • Coating method utilizing a polymer film and method of making metal-polymer laminates
    Patent number: 6334922
    Abstract: A coating layer of a polymer capable of forming an optically anisotropic melt phase is formed by heat-pressing to a base material a film made of the polymer and having a segment orientation ratio of not greater than 1.3 and then separating the film into two halves so as to leave one of the halves on the base material, thereby obtaining a coated material made of the base material and the thin coating layer.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: January 1, 2002
    Assignee: Kuraray Co., Ltd.
    Inventors: Yoshinobu Tanaka, Takeichi Tsudaka, Minoru Onodera, Toshiaki Sato
  • LCP films having roughened surface and process therefor
    Patent number: 5843562
    Abstract: A film having a roughened surface. The film is made of an LCP and has surface recessions covering at least about 25% of the area of the surface. The film is made by pressing an embossing means against the film surface at a temperature about 15.degree.-75.degree. C. below the melting point of the polymer. The embossed film has improved resistance to abrasion.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: December 1, 1998
    Assignees: Hoechst Celanese Corporation, Kuraray Co. Ltd.
    Inventors: Minoru Onodera, Takeichi Tsudaka, Toshiaki Sato, Randy Douglas Jester, Leonard R. Garrett, deceased, Detlef Frank
  • Process for treating liquid crystal polymer film
    Patent number: 5703202
    Abstract: A process for treating a liquid crystal polymer film which includes the steps of: heating a film obtained by extrusion molding of a liquid crystal polymer, while contacting at least one surface of the film with a supporting body, to melt the polymer; cooling the melted polymer to form a solidified polymer layer; and separating the solidified polymer layer from the supporting body. The process readily provides liquid crystal polymer films having excellent resistance to intra-layer delamination and high tensile strength and elongation, as well as excellent resistance to abrasion, dimensional stability when heated, and resistance to folding.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: December 30, 1997
    Assignees: Hoechst Celanese Corp, Kuraray Co. Ltd.
    Inventors: Randy Douglas Jester, John Arthur Penoyer, Douglas Duane Roth, Detlef Frank, Minoru Onodera, Takeichi Tsudaka, Toshiaki Sato, Tohei Moritani
  • Process for treating liquid crystal polymer film
    Patent number: 5529740
    Abstract: A process for treating a liquid crystal polymer film which includes the steps of: heating a film obtained by extrusion molding of a liquid crystal polymer, while contacting at least one surface of the film with a supporting body, to melt the polymer; cooling the melted polymer to form a solidified polymer layer; and separating the solidified polymer layer from the supporting body. The process readily provides liquid crystal polymer films having excellent resistance to intra-layer delamination and high tensile strength and elongation, as well as excellent resistance to abrasion, dimensional stability when heated, and resistance to folding.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: June 25, 1996
    Inventors: Randy D. Jester, John A. Penoyer, Douglas D. Roth, Detlef Frank, Minoru Onodera, Takeichi Tsudaka, Toshiaki Sato, Tohei Moritani
  • Process for treating film comprising liquid crystal polymer
    Patent number: 5360672
    Abstract: A process for treating a film comprising a liquid crystal polymer capable of forming an optically anisotropic melt phase, which comprises passing the film between press rolls at a temperature in a range of from 80.degree. C. below the melting point of the liquid crystal polymer to 5.degree. C. below the same melting point and under a linear pressure of 20 to 400 kg/cm.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: November 1, 1994
    Assignee: Kuraray Co., Ltd.
    Inventors: Koichi Saito, Takeichi Tsudaka