Patents by Inventor Takahiro Hozan

Takahiro Hozan 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: 6752545
    Abstract: A treating liquid adjusting equipment for adjusting an alkali-based treating liquid for use in treating an organic film applied onto a substrate, which includes an adjusting portion. The adjusting portion for adjusting an alkalinity of the alkali-based treating liquid is such that a concentration of a first component contained in the alkali-based treating liquid and constituting an organic film of a same type as or different type from the organic film is in a range of 0.0001 to 2.0 mass %, and a concentration of an alkali component contained in the alkali-based treating liquid is in a range of 0.05 to 2.5 mass %.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: June 22, 2004
    Assignees: Nagase & Co., Ltd., Hirama Laboratories Co., Ltd., Nagase CMS Technology Co., Ltd.
    Inventors: Toshimoto Nakagawa, Yuko Katagiri, Shu Ogawa, Satoru Morita, Makoto Kikukawa, Takahiro Hozan
  • Patent number: 6623183
    Abstract: The developer producing equipment of the present invention is connected via piping to working equipment in which electronic circuits, on which fine working is performed, are formed, and produces an alkali type developer used in the abovementioned working equipment. This developer producing equipment comprises a preparation tank to which a developer stock solution and pure water are supplied, and in which these are agitated, first liquid amount measuring means for measuring the amount of the alkali type developer inside the preparation tank, first alkali concentration measuring means for measuring the alkali concentration of the abovementioned alkali type developer, first liquid amount control means for adjusting the amount of the alkali type developer inside the preparation tank on the basis of the measured value obtained by the abovementioned first liquid amount measuring means the abovementioned first alkali concentration measuring means, and liquid supply control means.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: September 23, 2003
    Assignee: Nagase & Co., Ltd.
    Inventors: Toshimoto Nakagawa, Shu Ogawa, Satoru Morita, Makoto Kikukawa, Takahiro Hozan
  • Patent number: 6588927
    Abstract: The developer producing equipment of the present invention is equipped with a preparation tank to which a developer stock solution and pure water are supplied, and in which these ingredients are agitated, and a leveling tank which is connected to this preparation tank. The leveling tank is connected via piping to working equipment in which electronic circuits are formed. Furthermore, the preparation tank and leveling tank have first and second alkali concentration measuring means for measuring the alkali concentrations of the alkali type developer inside the respective tanks. In the preparation tank, either the amount of developer stock solution that is supplied to the tank or the amount of pure water that is supplied to the tank, or both, are adjusted on the basis of the measured value obtained by the first alkali concentration measuring means, so that an alkali type developer is prepared.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: July 8, 2003
    Assignee: Nagase & Co., Ltd.
    Inventors: Toshimoto Nakagawa, Shu Ogawa, Satoru Morita, Makoto Kikukawa, Takahiro Hozan
  • Publication number: 20030096199
    Abstract: The present invention has the object of supplying an alkali-based treating liquid capable of reducing the amount used for treatment and the amount of liquid wastes produced, having an excellent solubility with respect to an exposed organic film such as a photoresist, and an equipment for supplying the same. In a developing liquid supplying equipment of the present invention, a receiving bath is connected to a development treating equipment via a line, and a pre-treating portion such as a filter, an adjusting bath and a leveling bath are sequentially provided in the following stages of the receiving bath. A liquid supplying system and a control device are connected to the adjusting bath, and the concentrations of the dissolved photoresist component and the alkali component in a used liquid can be adjusted to certain values, based on actually measured values obtained with a densitometer. The obtained regenerated liquid is supplied to the development treating equipment through a line.
    Type: Application
    Filed: August 9, 2002
    Publication date: May 22, 2003
    Inventors: Toshimoto Nakagawa, Yuko Katagiri, Shu Ogawa, Satoru Morita, Makoto Kikukawa, Takahiro Hozan
  • Publication number: 20020146251
    Abstract: The developer producing equipment of the present invention is connected via piping to working equipment in which electronic circuits, on which fine working is performed, are formed, and produces an alkali type developer used in the abovementioned working equipment.
    Type: Application
    Filed: February 6, 2002
    Publication date: October 10, 2002
    Inventors: Toshimoto Nakagawa, Shu Ogawa, Satoru Morita, Makoto Kikukawa, Takahiro Hozan
  • Publication number: 20020136087
    Abstract: The developer producing equipment of the present invention is equipped with a preparation tank to which a developer stock solution and pure water are supplied, and in which these ingredients are agitated, and a leveling tank which is connected to this preparation tank. The leveling tank is connected via piping to working equipment in which electronic circuits are formed. Furthermore, the preparation tank and leveling tank have first and second alkali concentration measuring means for measuring the alkali concentrations of the alkali type developer inside the respective tanks. In the preparation tank, either the amount of developer stock solution that is supplied to the tank or the amount of pure water that is supplied to the tank, or both, are adjusted on the basis of the measured value obtained by the first alkali concentration measuring means, so that an alkali type developer is prepared.
    Type: Application
    Filed: February 6, 2002
    Publication date: September 26, 2002
    Inventors: Toshimoto Nakagawa, Shu Ogawa, Satoru Morita, Makoto Kikukawa, Takahiro Hozan