Patents by Inventor Yoshiki Hishiro

Yoshiki Hishiro 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: 8956981
    Abstract: A stabilizing solution for treating photoresist patterns and methods of preventing profile abnormalities, toppling and resist footing are disclosed. The stabilizing solution comprises a non-volatile component, such as non-volatile particles or polymers, which is applied after the photoresist material has been developed. By treating the photoresist with the solution containing a non-volatile component after developing but before drying, the non-volatile component fills the space between adjacent resist patterns and remains on the substrate during drying. The non-volatile component provides structural and mechanical support for the resist to prevent deformation or collapse by liquid surface tension forces.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: February 17, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Jon Daley, Yoshiki Hishiro
  • Patent number: 8859195
    Abstract: A method of lithographically patterning a substrate that has photoresist having removal areas and non-removal areas includes first exposing at least the non-removal areas to radiation effective to increase outer surface roughness of the photoresist in the non-removal areas at least post-develop but ineffective to change photoresist solubility in a developer for the photoresist to be cleared from the non-removal areas upon develop with the developer. Second exposing of radiation to the removal areas is conducted to be effective to change photoresist solubility in the developer for the photoresist to be cleared from the removal areas upon develop with the developer. The photoresist is developed with the developer effective to clear photoresist from the removal areas and to leave photoresist in the non-removal areas that has outer surface roughness in the non-removal areas which is greater than that before the first exposing. Other implementations and embodiments are contemplated.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: October 14, 2014
    Assignee: Micron Technology, Inc.
    Inventors: Yoshiki Hishiro, Scott Sills, Hiroyuki Mori, Troy Gugel, Paul D. Shirley, Lijing Gou, Adam Olson
  • Publication number: 20140038425
    Abstract: A stabilizing solution for treating photoresist patterns and methods of preventing profile abnormalities, toppling and resist footing are disclosed. The stabilizing solution comprises a non-volatile component, such as non-volatile particles or polymers, which is applied after the photoresist material has been developed. By treating the photoresist with the solution containing a non-volatile component after developing but before drying, the non-volatile component fills the space between adjacent resist patterns and remains on the substrate during drying. The non-volatile component provides structural and mechanical support for the resist to prevent deformation or collapse by liquid surface tension forces.
    Type: Application
    Filed: October 2, 2013
    Publication date: February 6, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Jon Daley, Yoshiki Hishiro
  • Patent number: 8552538
    Abstract: A stabilizing solution for treating photoresist patterns and methods of preventing profile abnormalities, toppling and resist footing are disclosed. The stabilizing solution comprises a non-volatile component, such as non-volatile particles or polymers, which is applied after the photoresist material has been developed. By treating the photoresist with the solution containing a non-volatile component after developing but before drying, the non-volatile component fills the space between adjacent resist patterns and remains on the substrate during drying. The non-volatile component provides structural and mechanical support for the resist to prevent deformation or collapse by liquid surface tension forces.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: October 8, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Jon Daley, Yoshiki Hishiro
  • Publication number: 20130059255
    Abstract: A method of lithographically patterning a substrate that has photoresist having removal areas and non-removal areas includes first exposing at least the non-removal areas to radiation effective to increase outer surface roughness of the photoresist in the non-removal areas at least post-develop but ineffective to change photoresist solubility in a developer for the photoresist to be cleared from the non-removal areas upon develop with the developer. Second exposing of radiation to the removal areas is conducted to be effective to change photoresist solubility in the developer for the photoresist to be cleared from the removal areas upon develop with the developer. The photoresist is developed with the developer effective to clear photoresist from the removal areas and to leave photoresist in the non-removal areas that has outer surface roughness in the non-removal areas which is greater than that before the first exposing. Other implementations and embodiments are contemplated.
    Type: Application
    Filed: October 24, 2012
    Publication date: March 7, 2013
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Yoshiki Hishiro, Scott Sills, Hiroyuki Mori, Troy Gugel, Paul D. Shirley, Lijing Gou, Adam Olson
  • Patent number: 8309297
    Abstract: A method of lithographically patterning a substrate that has photoresist having removal areas and non-removal areas includes first exposing at least the non-removal areas to radiation effective to increase outer surface roughness of the photoresist in the non-removal areas at least post-develop but ineffective to change photoresist solubility in a developer for the photoresist to be cleared from the non-removal areas upon develop with the developer. Second exposing of radiation to the removal areas is conducted to be effective to change photoresist solubility in the developer for the photoresist to be cleared from the removal areas upon develop with the developer. The photoresist is developed with the developer effective to clear photoresist from the removal areas and to leave photoresist in the non-removal areas that has outer surface roughness in the non-removal areas which is greater than that before the first exposing. Other implementations and embodiments are contemplated.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: November 13, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Yoshiki Hishiro, Scott Sills, Hiroyuki Mori, Troy Gugel, Paul D. Shirley, Lijing Gou, Adam Olson
  • Patent number: 8163468
    Abstract: Reducing or eliminating watermark-type defects during semiconductor device fabrication are described and can comprise treating photoresist using one of several embodiments. In some embodiments, the propensity for defect formation is reduced/eliminated by conditioning the photoresist surface through the application and removal of a sacrificial overcoat. In other embodiments, existing defects are reduced/eliminated by exposing the photoresist surface to a defect-stripping material during post-develop processing.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: April 24, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Yoshiki Hishiro, Lijing Gou, Scott E. Sills, Hiroyuki Mori, Paul D. Shirley, Troy V. Gugel, Adam L. Olson
  • Publication number: 20110042622
    Abstract: A reflow stabilizing solution for treating photoresist patterns and a reflow technology are disclosed. The reflow stabilizing solution comprises a polymer and is applied after the photoresist material has been developed and patterned. By treating the photoresist with the reflow stabilizing solution after resist patterning and further subjecting the reflow stabilizing solution to a heat treatment, the non-volatile polymer remains in between adjacent resist patterns and acts as a stopper to the reflowed photoresist. In this manner, the non-volatile polymer provides structural and mechanical support for the reflowed resist, preventing resist collapse at high temperatures and allowing the formation of reflowed resist structures having line width dimensions in the submicron range.
    Type: Application
    Filed: November 2, 2010
    Publication date: February 24, 2011
    Inventor: Yoshiki Hishiro
  • Patent number: 7846623
    Abstract: A reflow stabilizing solution for treating photoresist patterns and a reflow technology are disclosed. The reflow stabilizing solution comprises a polymer and is applied after the photoresist material has been developed and patterned. By treating the photoresist with the reflow stabilizing solution after resist patterning and further subjecting the reflow stabilizing solution to a heat treatment, the non-volatile polymer remains in between adjacent resist patterns and acts as a stopper to the reflowed photoresist. In this manner, the non-volatile polymer provides structural and mechanical support for the reflowed resist, preventing resist collapse at high temperatures and allowing the formation of reflowed resist structures having line width dimensions in the submicron range.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: December 7, 2010
    Assignee: Micron Technology, Inc.
    Inventor: Yoshiki Hishiro
  • Publication number: 20100181656
    Abstract: A stabilizing solution for treating photoresist patterns and methods of preventing profile abnormalities, toppling and resist footing are disclosed. The stabilizing solution comprises a non-volatile component, such as non-volatile particles or polymers, which is applied after the photoresist material has been developed. By treating the photoresist with the solution containing a non-volatile component after developing but before drying, the non-volatile component fills the space between adjacent resist patterns and remains on the substrate during drying. The non-volatile component provides structural and mechanical support for the resist to prevent deformation or collapse by liquid surface tension forces.
    Type: Application
    Filed: February 16, 2010
    Publication date: July 22, 2010
    Inventors: Jon Daley, Yoshiki Hishiro
  • Patent number: 7687406
    Abstract: A stabilizing solution for treating photoresist patterns and methods of preventing profile abnormalities, toppling and resist footing are disclosed. The stabilizing solution comprises a non-volatile component, such as non-volatile particles or polymers, which is applied after the photoresist material has been developed. By treating the photoresist with the solution containing a non-volatile component after developing but before drying, the non-volatile component fills the space between adjacent resist patterns and remains on the substrate during drying. The non-volatile component provides structural and mechanical support for the resist to prevent deformation or collapse by liquid surface tension forces.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: March 30, 2010
    Assignee: Micron Technology, Inc.
    Inventors: Jon Daley, Yoshiki Hishiro
  • Publication number: 20090226847
    Abstract: Reducing or eliminating watermark-type defects during semiconductor device fabrication are described and can comprise treating photoresist using one of several embodiments. In some embodiments, the propensity for defect formation is reduced/eliminated by conditioning the photoresist surface through the application and removal of a sacrificial overcoat. In other embodiments, existing defects are reduced/eliminated by exposing the photoresist surface to a defect-stripping material during post-develop processing.
    Type: Application
    Filed: March 10, 2008
    Publication date: September 10, 2009
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Yoshiki Hishiro, Lijing Gou, Scott E. Sills, Hiroyuki Mori, Paul D. Shirley, Troy V. Gugel, Adam L. Olson
  • Patent number: 7538036
    Abstract: A patterned mask can be formed as follows. A first patterned photoresist is formed over a masking layer and utilized during a first etch into the masking layer. The first etch extends to a depth in the masking layer that is less than entirely through the masking layer. A second patterned photoresist is subsequently formed over the masking layer and utilized during a second etch into the masking layer. The combined first and second etches form openings extending entirely through the masking layer and thus form the masking layer into the patterned mask. The patterned mask can be utilized to form a pattern in a substrate underlying the mask. The pattern formed in the substrate can correspond to an array of capacitor container openings. Capacitor structure can be formed within the openings. The capacitor structures can be incorporated within a DRAM array.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: May 26, 2009
    Assignee: Micron Technology, Inc.
    Inventors: Brett W. Busch, Luan C. Tran, Ardavan Niroomand, Fred D. Fishburn, Yoshiki Hishiro, Ulrich C. Boettiger, Richard D. Holscher
  • Publication number: 20090092933
    Abstract: A method of lithographically patterning a substrate that has photoresist having removal areas and non-removal areas includes first exposing at least the non-removal areas to radiation effective to increase outer surface roughness of the photoresist in the non-removal areas at least post-develop but ineffective to change photoresist solubility in a developer for the photoresist to be cleared from the non-removal areas upon develop with the developer. Second exposing of radiation to the removal areas is conducted to be effective to change photoresist solubility in the developer for the photoresist to be cleared from the removal areas upon develop with the developer. The photoresist is developed with the developer effective to clear photoresist from the removal areas and to leave photoresist in the non-removal areas that has outer surface roughness in the non-removal areas which is greater than that before the first exposing. Other implementations and embodiments are contemplated.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 9, 2009
    Inventors: Yoshiki Hishiro, Scott Sills, Hiroyuki Mori, Troy Gugel, Paul D. Shirley, Lijing Gou, Adam Olson
  • Publication number: 20080261125
    Abstract: A reflow stabilizing solution for treating photoresist patterns and a reflow technology are disclosed. The reflow stabilizing solution comprises a polymer and is applied after the photoresist material has been developed and patterned. By treating the photoresist with the reflow stabilizing solution after resist patterning and further subjecting the reflow stabilizing solution to a heat treatment, the non-volatile polymer remains in between adjacent resist patterns and acts as a stopper to the reflowed photoresist. In this manner, the non-volatile polymer provides structural and mechanical support for the reflowed resist, preventing resist collapse at high temperatures and allowing the formation of reflowed resist structures having line width dimensions in the submicron range.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 23, 2008
    Inventor: Yoshiki Hishiro
  • Patent number: 7402379
    Abstract: A resist exposure system and a method of forming a pattern on a resist are provided and include an exposure source, a photoresist composition, and a mask positioned therebetween. The resist composition comprises a first photoresist X and a second photoresist Y. The first photoresist X absorbs at a higher wavelength than the second photoresist Y. The second photoresist Y has a lower glass transitional temperature than the first photoresist X.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: July 22, 2008
    Assignee: Micron Technology, Inc.
    Inventor: Yoshiki Hishiro
  • Patent number: 7371509
    Abstract: A reflow stabilizing solution for treating photoresist patterns and a reflow technology are disclosed. The reflow stabilizing solution comprises a polymer and is applied after the photoresist material has been developed and patterned. By treating the photoresist with the reflow stabilizing solution after resist patterning and further subjecting the reflow stabilizing solution to a heat treatment, the non-volatile polymer remains in between adjacent resist patterns and acts as a stopper to the reflowed photoresist. In this manner, the non-volatile polymer provides structural and mechanical support for the reflowed resist, preventing resist collapse at high temperatures and allowing the formation of reflowed resist structures having line width dimensions in the submicron range.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: May 13, 2008
    Assignee: Micron Technology, Inc.
    Inventor: Yoshiki Hishiro
  • Patent number: 7169545
    Abstract: A resist exposure system and a method of forming a pattern on a resist are provided and include an exposure source, a photoresist composition, and a mask positioned therebetween. The resist composition comprises a first photoresist X and a second photoresist Y. The first photoresist X absorbs at a higher wavelength than the second photoresist Y. The second photoresist Y has a lower glass transitional temperature than the first photoresist X.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: January 30, 2007
    Assignee: Micron Technology, Inc.
    Inventor: Yoshiki Hishiro
  • Patent number: 7153778
    Abstract: A patterned mask can be formed as follows. A first patterned photoresist is formed over a masking layer and utilized during a first etch into the masking layer. The first etch extends to a depth in the masking layer that is less than entirely through the masking layer. A second patterned photoresist is subsequently formed over the masking layer and utilized during a second etch into the masking layer. The combined first and second etches form openings extending entirely through the masking layer and thus form the masking layer into the patterned mask. The patterned mask can be utilized to form a pattern in a substrate underlying the mask. The pattern formed in the substrate can correspond to an array of capacitor container openings. Capacitor structure can be formed within the openings. The capacitor structures can be incorporated within a DRAM array.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 26, 2006
    Assignee: Micron Technology, Inc.
    Inventors: Brett W. Busch, Luan C. Tran, Ardavan Niroomand, Fred D. Fishburn, Yoshiki Hishiro, Ulrich C. Boettiger, Richard D. Holscher
  • Publication number: 20060257758
    Abstract: A stabilizing solution for treating photoresist patterns and methods of preventing profile abnormalities, toppling and resist footing are disclosed. The stabilizing solution comprises a non-volatile component, such as non-volatile particles or polymers, which is applied after the photoresist material has been developed. By treating the photoresist with the solution containing a non-volatile component after developing but before drying, the non-volatile component fills the space between adjacent resist patterns and remains on the substrate during drying. The non-volatile component provides structural and mechanical support for the resist to prevent deformation or collapse by liquid surface tension forces.
    Type: Application
    Filed: July 17, 2006
    Publication date: November 16, 2006
    Inventors: Jon Daley, Yoshiki Hishiro