Patents by Inventor Takuo Oowada

Takuo Oowada 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: 7816312
    Abstract: The present invention provides a composition for photoresist stripping solution which shows a superior stripping property of photoresists and damaged photoresist layers remained after dry etching in the fabrication process of semiconductor circuit devices, without attacking new wiring materials and interlayer insulating film materials, as well as a process of stripping of photoresists and damaged photoresist layers. The composition for photoresist stripping solution which contains at least one of acetylene alcohol compounds and organic sulfonic acid compounds, and at least one of polyvalent alcohols and their derivatives is used.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: October 19, 2010
    Assignee: Kanto Kagaku Kabushiki Kaisha
    Inventors: Takuo Oowada, Kaoru Ikegami
  • Patent number: 7816313
    Abstract: A photoresist residue remover composition is provided that removes a photoresist residue formed by a resist ashing treatment after dry etching in a step of forming, on a substrate surface, wiring of any metal of aluminum, copper, tungsten, and an alloy having any of these metals as a main component, the composition including one or two or more types of inorganic acid and one or two or more types of inorganic fluorine compound. There is also provided a process for producing a semiconductor circuit element wherein, in a step of forming wiring of any metal of aluminum, copper, tungsten, and an alloy having any of these metals as a main component, the photoresist residue remover composition is used for removing a photoresist residue formed by a resist ashing treatment after dry etching.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: October 19, 2010
    Assignees: Kanto Kagaku Kabushiki Kaisha, Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Kawamoto, Mikie Miyasato, Takuo Oowada, Norio Ishikawa
  • Patent number: 7563754
    Abstract: A composition for removing a photoresist residue and a polymer residue remaining on a semiconductor substrate after dry etching and after ashing is provided, the composition containing at least one type of fluorine compound, at least one type of organic acid, at least one type of organic amine, and water, the composition having a pH of 4 to 7, and the total content of components other than water being 0.3 to 30 mass % of the entire composition.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: July 21, 2009
    Assignee: Kanto Kagaku Kabushiki Kaisha
    Inventors: Takuo Oowada, Kaoru Ikegami, Norio Ishikawa
  • Publication number: 20080318424
    Abstract: A photoresist residue remover composition is provided that removes a photoresist residue formed by a resist ashing treatment after dry etching in a step of forming, on a substrate surface, wiring of any metal of aluminum, copper, tungsten, and an alloy having any of these metals as a main component, the composition including one or two or more types of inorganic acid and one or two or more types of inorganic fluorine compound. There is also provided a process for producing a semiconductor circuit element wherein, in a step of forming wiring of any metal of aluminum, copper, tungsten, and an alloy having any of these metals as a main component, the photoresist residue remover composition is used for removing a photoresist residue formed by a resist ashing treatment after dry etching.
    Type: Application
    Filed: April 8, 2008
    Publication date: December 25, 2008
    Inventors: Hiroshi Kawamoto, Mikie Miyasato, Takuo Oowada, Norio Ishikawa
  • Publication number: 20060205623
    Abstract: The present invention provides a composition for photoresist stripping solution which shows a superior stripping property of photoresists and damaged photoresist layers remained after dry etching in the fabrication process of semiconductor circuit devices, without attacking new wiring materials and interlayer insulating film materials, as well as a process of stripping of photoresists and damaged photoresist layers. The composition for photoresist stripping solution which contains at least one of acetylene alcohol compounds and organic sulfonic acid compounds, and at least one of polyvalent alcohols and their derivatives is used.
    Type: Application
    Filed: March 9, 2006
    Publication date: September 14, 2006
    Applicant: Kanto Kagaku Kabushiki Kaisha
    Inventors: Takuo Oowada, Kaoru Ikegami
  • Patent number: 7087562
    Abstract: A post-CMP washing liquid composition is provided which includes one type or two or more types of aliphatic polycarboxylic acids and one type or two or more types selected from the group consisting of glyoxylic acid, ascorbic acid, glucose, fructose, lactose, and mannose, and which has a pH of less than 3.0. This washing liquid has excellent performance in removing micro particles and metal impurities adhering to the surface of a semiconductor substrate after CMP and does not corrode a metal wiring material.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: August 8, 2006
    Assignees: Kanto Kagaku Kabushiki Kaisha, NEC Electronics Corporation
    Inventors: Yumiko Abe, Takuo Oowada, Norio Ishikawa, Hidemitsu Aoki, Hiroaki Tomimori
  • Publication number: 20060046944
    Abstract: A composition for removing a photoresist residue and polymer residue to remove a photoresist residue and an ashing residue remaining after dry etching and after ashing of a semiconductor substrate having metal wiring formed from aluminum or an aluminum alloy is provided, the composition containing at least one type of fluorine compound (excluding hydrofluoric acid), at least one type of sulfonic acid, and water.
    Type: Application
    Filed: August 24, 2005
    Publication date: March 2, 2006
    Applicant: Kanto Kagaku Kabushiki Kaisha
    Inventors: Kisato Hata, Takuo Oowada
  • Publication number: 20050288199
    Abstract: A composition for removing a photoresist residue and a polymer residue remaining on a semiconductor substrate after dry etching and after ashing is provided, the composition containing at least one type of fluorine compound, at least one type of organic acid, at least one type of organic amine, and water, the composition having a pH of 4 to 7, and the total content of components other than water being 0.3 to 30 mass % of the entire composition.
    Type: Application
    Filed: June 28, 2005
    Publication date: December 29, 2005
    Applicant: Kanto Kagaku Kabushiki Kaisha
    Inventors: Takuo Oowada, Kaoru Ikegami, Norio Ishikawa
  • Publication number: 20050209118
    Abstract: A photoresist residue remover composition is provided that removes a photoresist residue formed by a resist ashing treatment after dry etching in a step of forming, on a substrate surface, wiring of any metal of aluminum, copper, tungsten, and an alloy having any of these metals as a main component, the composition including one or two or more types of inorganic acid and one or two or more types of inorganic fluorine compound. There is also provided a process for producing a semiconductor circuit element wherein, in a step of forming wiring of any metal of aluminum, copper, tungsten, and an alloy having any of these metals as a main component, the photoresist residue remover composition is used for removing a photoresist residue formed by a resist ashing treatment after dry etching.
    Type: Application
    Filed: December 9, 2004
    Publication date: September 22, 2005
    Inventors: Hiroshi Kawamoto, Mikie Miyasato, Takuo Oowada, Norio Ishikawa
  • Patent number: 6864044
    Abstract: The object of the present invention is to provide, in the production of semiconductor circuit elements, a photoresist residue removing liquid composition which is excellent for removing photoresist residues after dry etching without attacking the wiring material or the interlayer insulating film etc. This is made possible by a photoresist residue removing liquid composition containing one or more members selected from the group consisting of reducing compounds and their salts and one or more members selected from the group consisting of aliphatic polycarboxylic acids and their salts.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: March 8, 2005
    Assignee: Kanto Kagaku Kabushiki Kaisha
    Inventors: Norio Ishikawa, Takuo Oowada
  • Patent number: 6787293
    Abstract: A photoresist residue remover composition is provided that includes one type or two or more types of fluoride compound and one type or two or more types chosen from the group consisting of glyoxylic acid, ascorbic acid, glucose, fructose, lactose, and mannose (but excluding one that includes ammonium fluoride, a polar organic solvent, water, and ascorbic acid). There is also provided use of the photoresist residue remover composition for removing a photoresist residue and a sidewall polymer remaining after dry etching and after ashing.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: September 7, 2004
    Assignees: Kanto Kagaku Kabushiki Kaisha, NEC Electronics Corporation
    Inventors: Takuo Oowada, Norio Ishikawa, Hidemitsu Aoki, Kenichi Nakabeppu, Yoshiko Kasama
  • Publication number: 20040002020
    Abstract: A photoresist residue remover composition is provided that includes one type or two or more types of fluoride compound and one type or two or more types chosen from the group consisting of glyoxylic acid, ascorbic acid, glucose, fructose, lactose, and mannose (but excluding one that includes ammonium fluoride, a polar organic solvent, water, and ascorbic acid). There is also provided use of the photoresist residue remover composition for removing a photoresist residue and a sidewall polymer remaining after dry etching and after ashing.
    Type: Application
    Filed: March 21, 2003
    Publication date: January 1, 2004
    Inventors: Takuo Oowada, Norio Ishikawa, Hidemitsu Aoki, Kenichi Nakabeppu, Yoshiko Kasama
  • Publication number: 20030216270
    Abstract: A post-CMP washing liquid composition is provided which includes one type or two or more types of aliphatic polycarboxylic acids and one type or two or more types selected from the group consisting of glyoxylic acid, ascorbic acid, glucose, fructose, lactose, and mannose, and which has a pH of less than 3.0. This washing liquid has excellent performance in removing micro particles and metal impurities adhering to the surface of a semiconductor substrate after CMP and does not corrode a metal wiring material.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 20, 2003
    Inventors: Yumiko Abe, Takuo Oowada, Norio Ishikawa, Hidemitsu Aoki, Hiroaki Tomimori
  • Publication number: 20030143495
    Abstract: The object of the present invention is to provide, in the production of semiconductor circuit elements, a photoresist residue removing liquid composition which is excellent for removing photoresist residues after dry etching without attacking the wiring material or the interlayer insulating film etc.
    Type: Application
    Filed: December 4, 2002
    Publication date: July 31, 2003
    Inventors: Norio Ishikawa, Takuo Oowada