Patents by Inventor Jun Iwashita

Jun Iwashita 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).

  • Publication number: 20100062379
    Abstract: Disclosed is a method of forming a resist pattern, including: applying a positive resist composition on a support 1 to form a first resist film 2; selectively exposing the first resist film 2 through a first mask pattern, and developing it to form a first resist pattern 3; applying a negative resist composition including an organic solvent (S?) containing an alcohol-based organic solvent on the support 1 that the first resist pattern 3 is formed, thereby forming a second resist film 6; and selectively exposing the second resist film 6 through a second mask pattern, and developing it to form a resist pattern denser than the first resist pattern 3.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 11, 2010
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventor: Jun Iwashita
  • Publication number: 20100055606
    Abstract: The present invention provides a positive resist composition capable of forming a resist pattern with high resolution, and a method of forming a resist pattern. This composition is a positive resist composition including a resin component (A) which exhibits increased solubility in an alkali developing solution under action of acid, and an acid-generator component (B) which generates acid upon irradiation, the resin component (A) containing a polymer including: a core portion represented by general formula (1) [Chemical Formula 1] P?X—Y)a ??(1) wherein P represents an a-valent organic group; a represents an integer of 2 to 20; Y represents an arylene group or an alkylene group of 1 to 12 carbon atoms; and X represents a specific linking group which can be cleaved under action of acid, and arm portions that are bonded to the core portion and are also composed of a polymer chain obtained by an anionic polymerization method.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 4, 2010
    Inventors: Takeyoshi Mimura, Jun Iwashita
  • Publication number: 20090305163
    Abstract: A negative resist composition is used for either a first or second resist layer within a method of forming a resist pattern that includes the following steps (i) and (ii): (i) a step of forming the first resist layer on a substrate using a first resist composition, and then conducting selective exposure that forms a dense pattern in the first resist layer, and (ii) a step of forming the second resist layer on top of the first resist layer using a second resist composition, and then conducting selective exposure that forms a pattern in the second resist layer, wherein the negative resist composition is dissolved in an alcohol-based organic solvent, which functions as an organic solvent (D) that does not dissolve the first or second resist layer that contacts the resist layer formed from the negative resist composition.
    Type: Application
    Filed: October 26, 2005
    Publication date: December 10, 2009
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Jun Iwashita, Takeshi Iwai
  • Publication number: 20090297980
    Abstract: A novel resist composition and method of forming a resist pattern that can be used in lithography applications. The resist composition includes a base component (A) that exhibits changed solubility in an alkali developing solution under action of acid, and an acid generator component (B) that generates acid upon exposure, wherein the base component (A) contains a polymer compound (A1) having a structural unit (a0) represented by general formula (a0-1) shown below, wherein R1 represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a fluorinated alkyl group of 1 to 5 carbon atoms, R2 and R3 each independently represents a hydrogen atom or an alkyl group that may include an oxygen atom at an arbitrary position, or R2 and R3 are bonded together to form an alkylene group, and W represents a cyclic alkylene group that may include an oxygen atom at an arbitrary position.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 3, 2009
    Inventors: Jun Iwashita, Shogo Matsumaru, Sho Abe
  • Patent number: 7598017
    Abstract: A negative resist composition including: a fluorine-containing resin component (F) containing a structural unit (f1) represented by a general formula (f1-0) shown below, and a structural unit (f2) having an alkali-soluble group, an alkali-soluble resin component (A) excluding the fluorine-containing resin component (F), an acid generator component (B) that generates acid upon exposure, and a cross-linking component (C). [wherein, R7 represents a fluorinated alkyl group, and a represents either 0 or 1.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: October 6, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Jun Iwashita, Kazuhito Sasaki, Sho Abe
  • Patent number: 7582409
    Abstract: A negative resist composition that includes an alkali-soluble resin component, an acid generator component that generates acid upon exposure, and a cross-linker component, wherein the alkali-soluble resin component is a copolymer that includes a structural unit containing an aliphatic cyclic group having a fluorinated hydroxyalkyl group, and a structural unit derived from an acrylate ester that contains a hydroxyl group-containing aliphatic cyclic group, and the cross-linker component includes an alkylene urea-based cross-linker.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: September 1, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Jun Iwashita, Ayako Kusaka
  • Publication number: 20090162785
    Abstract: There are provided a polymer compound which can form a resist pattern with excellent resolution, and a negative resist composition containing the polymer compound and a resist pattern-forming method thereof. The present invention is a polymer compound containing a structural unit (a0) represented by a general formula (a0-1) shown below. (wherein, R represents a hydrogen atom, a halogen atom, an alkyl group or a halogenated alkyl group; and R0 represents an alkyl group containing a hydroxyl group.) Also, the present invention is a negative resist composition, including: an alkali soluble resin component (A), an acid generator component (B) that generates acid upon exposure, and a cross-linking agent (C), wherein the alkali soluble resin component (A) contains a polymer compound (A1) having a structural unit (a0) represented by the general formula (a0-1) shown above.
    Type: Application
    Filed: August 17, 2006
    Publication date: June 25, 2009
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Jun Iwashita, Ayako Kusaka
  • Publication number: 20090142698
    Abstract: A negative resist composition that includes an alkali-soluble resin component, an acid generator component that generates acid upon exposure, and a cross-linker component, wherein the alkali-soluble resin component is a copolymer that includes a structural unit containing an aliphatic cyclic group having a fluorinated hydroxyalkyl group, and a structural unit derived from an acrylate ester that contains a hydroxyl group-containing aliphatic cyclic group, and the cross-linker component includes an alkylene urea-based cross-linker.
    Type: Application
    Filed: June 6, 2006
    Publication date: June 4, 2009
    Applicant: TOKYO OHKA KOGYO CO., LTD
    Inventors: Jun Iwashita, Ayako Kusaka
  • Publication number: 20090142693
    Abstract: A negative resist composition and a method of forming a resist pattern that are capable of suppressing resist pattern swelling are provided. The negative resist composition includes an alkali-soluble resin component (A), an acid generator component (B) that generates acid upon exposure, and a cross-linking agent component (C), wherein the alkali-soluble resin component (A) is a copolymer (A1) that includes a structural unit (a1) containing, within the main chain, an aliphatic cyclic group having a fluorinated hydroxyalkyl group, a structural unit (a2) derived from an acrylate ester which contains a hydroxyl group-containing chain-like or cyclic alkyl group and has a fluoroalkyl group or fluorine atom bonded to the ?-position, and a structural unit (a3) derived from an acrylate ester which contains an aliphatic cyclic group having a fluorinated hydroxyalkyl group and has a fluoroalkyl group or fluorine atom bonded to the ?-position.
    Type: Application
    Filed: January 11, 2006
    Publication date: June 4, 2009
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventor: Jun Iwashita
  • Patent number: 7541138
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: June 2, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20090130605
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Application
    Filed: October 15, 2008
    Publication date: May 21, 2009
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Patent number: 7527909
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: May 5, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20090111054
    Abstract: A negative resist composition including: a fluorine-containing resin component (F) containing a structural unit (f1) represented by a general formula (f1-0) shown below, and a structural unit (f2) having an alkali-soluble group, an alkali-soluble resin component (A) excluding the fluorine-containing resin component (F), an acid generator component (B) that generates acid upon exposure, and a cross-linking component (C). [wherein, R7 represents a fluorinated alkyl group, and a represents either 0 or 1.
    Type: Application
    Filed: October 24, 2008
    Publication date: April 30, 2009
    Applicant: Tokyo Ohka Kogyo Co., ltd.
    Inventors: Jun Iwashita, Kazuhito Sasaki, Sho Abe
  • Publication number: 20090098489
    Abstract: A method for forming a resist pattern that includes the following steps (i) and (ii): (i) a step of forming a first resist layer on a substrate using a positive resist composition, and then conducting selective exposure, thereby forming a latent image of a dense pattern on the first resist layer, and (ii) a step of forming a second resist layer on top of the first resist layer using a negative resist composition, conducting selective exposure, and then developing the first resist layer and the second resist layer simultaneously, thereby exposing a portion of the latent image of the dense pattern, wherein as the negative resist composition, a negative resist composition dissolved in an organic solvent that does not dissolve the first resist layer is used.
    Type: Application
    Filed: November 8, 2005
    Publication date: April 16, 2009
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Takeshi Iwai, Jun Iwashita
  • Patent number: 7501220
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: March 10, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20090035697
    Abstract: A chemically amplified negative resist composition is provided in addition to a method of forming a resist pattern from which a desirable pattern shape can be obtained.
    Type: Application
    Filed: April 7, 2006
    Publication date: February 5, 2009
    Applicant: TOKYO OHKAKOGYO CO.,LTD.
    Inventor: Jun Iwashita
  • Publication number: 20070190436
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Application
    Filed: January 10, 2007
    Publication date: August 16, 2007
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Publication number: 20070178394
    Abstract: A resist composition which is stable relative to solvents used in immersion lithography processes and displays excellent sensitivity and resist pattern profile, and a method of forming a resist pattern that uses such a resist composition are provided. The resist composition is in accordance with predetermined parameters, or is a positive resist composition comprising a resin component (A) which contains an acid dissociable, dissolution inhibiting group and displays increased alkali solubility under the action of acid, an acid generator component (B), and an organic solvent (C), wherein the component (A) contains a structural unit (a1) derived from a (meth)acrylate ester containing an acid dissociable, dissolution inhibiting group, but contains no structural units (a0), including structural units (a0-1) containing an anhydride of a dicarboxylic acid and structural units (a0-2) containing a phenolic hydroxyl group.
    Type: Application
    Filed: January 10, 2007
    Publication date: August 2, 2007
    Applicant: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Taku Hirayama, Hideo Hada, Satoshi Fujimura, Takeshi Iwai, Mitsuru Sato, Ryoichi Takasu, Toshikazu Tachikawa, Jun Iwashita, Keita Ishiduka, Tomotaka Yamada, Toshikazu Takayama, Masaaki Yoshida
  • Patent number: 6982140
    Abstract: There is provided a positive type resist composition formed by dissolving (A) a resin component with a unit derived from a (meth)acrylate ester in the principal chain, for which the solubility in alkali increases under the action of acid, and (B) an acid generator component which generates acid on exposure, in an organic solvent component (C), wherein the resin component (A) is a copolymer comprising (a1) a unit derived from a (meth)acrylate ester comprising an acid dissociable, dissolution inhibiting group containing a polycyclic group, (a2) a unit derived from a (meth)acrylate ester comprising a lactone containing monocyclic group or polycyclic group, (a3) a unit derived from a (meth)acrylate ester comprising a hydroxyl group containing polycyclic group, and (a4) a unit derived from a (meth)acrylate ester comprising a polycyclic group which is different from the unit (a1), the unit (a2) and the unit (a3).
    Type: Grant
    Filed: November 29, 2002
    Date of Patent: January 3, 2006
    Assignee: Tokyo Ohka Kogyo., Ltd.
    Inventors: Hideo Hada, Satoshi Fujimura, Jun Iwashita
  • Patent number: 6936400
    Abstract: A negative resist composition is provided which is less likely to swell in an alkali developing solution. An alkali-developable negative resist composition is disclosed comprising a compound (A) which generates an acid upon exposure to radiation, and a resin component (B) which becomes insoluble in alkali under the action of an acid, wherein the component (B) is a resin component containing: (b1) a unit which becomes insoluble in an alkali solution as a result of the formation of a lactone under the action of an acid generated from the component (A), and (b2) a unit having an alcoholic hydroxyl group.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: August 30, 2005
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Ryoichi Takasu, Miwa Miyairi, Jun Iwashita, Toshikazu Tachikawa