Patents by Inventor David A. Kewley

David A. Kewley 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: 9176385
    Abstract: Methods of lithography, methods for forming patterning tools, and patterning tools are described. One such patterning tool include an active region that forms a first diffraction image on a lens when in use, and an inactive region that forms a second diffraction image on a lens when in use. The inactive region includes a pattern of phase shifting features formed in a substantially transparent material of the patterning tool. Patterning tools and methods, as described, can be used to compensate for lens distortion from effects such as localized heating.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: November 3, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Jianming Zhou, Scott L. Light, David Kewley, Prasanna Srinivasan, Anton deVilliers
  • Patent number: 9178077
    Abstract: Some embodiments include a semiconductor construction having a stack containing alternating levels of control gate material and intervening dielectric material. A channel material panel extends through the stack and along a first direction. The panel divides the stack into a first section on a first side of the panel and a second section on a second side of the panel. Memory cell stacks are between the channel material panel and the control gate material. The memory cell stacks include cell dielectric material shaped as containers having open ends pointing toward the channel material panel, and include charge-storage material within the containers. Some embodiments include methods of forming semiconductor constructions.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: November 3, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Neal L. Davis, David A. Kewley
  • Publication number: 20150235938
    Abstract: Some embodiments include methods of forming electrically conductive lines. Photoresist features are formed over a substrate, with at least one of the photoresist features having a narrowed region. The photoresist features are trimmed, which punches through the narrowed region to form a gap. Spacers are formed along sidewalls of the photoresist features. Two of the spacers merge within the gap. The photoresist features are removed to leave a pattern comprising the spacers. The pattern is extended into the substrate to form a plurality of recesses within the substrate. Electrically conductive material is formed within the recesses to create the electrically conductive lines. Some embodiments include semiconductor constructions having a plurality of lines over a semiconductor substrate. Two of the lines are adjacent to one another and are substantially parallel to one another except in a region wherein said two of the lines merge into one another.
    Type: Application
    Filed: April 29, 2015
    Publication date: August 20, 2015
    Inventors: Vishal Sipani, Kyle Armstrong, Michael D. Hyatt, Michael Dean Van Patten, David A. Kewley, Ming-Chuan Yang
  • Patent number: 9102121
    Abstract: Substrates and methods of forming a pattern on a substrate. The pattern includes a repeating pattern region and a pattern-interrupting region adjacent to the repeating pattern region. A mask is formed on the substrate, with the mask including the repeating pattern region and the pattern-interrupting region and which are formed using two separate masking steps. The mask is used in forming the pattern into underlying substrate material on which the mask is received. Substrates comprising masks are also disclosed.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 11, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Vishal Sipani, David A. Kewley, Kyle Armstrong, Michael Dean Van Patten, Michael D. Hyatt
  • Patent number: 9059115
    Abstract: Some embodiments include methods of forming memory. A series of photoresist features may be formed over a gate stack, and a placeholder may be formed at an end of said series. The placeholder may be spaced from the end of said series by a gap. A layer may be formed over and between the photoresist features, over the placeholder, and within said gap. The layer may be anisotropically etched into a plurality of first vertical structures along edges of the photoresist features, and into a second vertical structure along an edge of the placeholder. A mask may be formed over the second vertical structure. Subsequently, the first vertical structures may be used to pattern string gates while the mask is used to pattern a select gate. Some embodiments include methods of forming conductive runners, and some embodiments may include semiconductor constructions.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 16, 2015
    Assignee: Micron Technology, Inc.
    Inventors: David A. Kewley, Brian Cleereman, Stephen W. Russell, Rex Stone, Anthony C. Krauth
  • Patent number: 9048292
    Abstract: Some embodiments include methods of forming electrically conductive lines. Photoresist features are formed over a substrate, with at least one of the photoresist features having a narrowed region. The photoresist features are trimmed, which punches through the narrowed region to form a gap. Spacers are formed along sidewalls of the photoresist features. Two of the spacers merge within the gap. The photoresist features are removed to leave a pattern comprising the spacers. The pattern is extended into the substrate to form a plurality of recesses within the substrate. Electrically conductive material is formed within the recesses to create the electrically conductive lines. Some embodiments include semiconductor constructions having a plurality of lines over a semiconductor substrate. Two of the lines are adjacent to one another and are substantially parallel to one another except in a region wherein said two of the lines merge into one another.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: June 2, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Vishal Sipani, Kyle Armstrong, Michael D. Hyatt, Michael Dean Van Patten, David A. Kewley, Ming-Chuan Yang
  • Patent number: 8966409
    Abstract: A method of forming a mask includes creating a difference map between a desired intra-field pattern that is to be formed on substrates and an intra-field signature pattern. The intra-field signature pattern represents a pattern formed on an example substrate by an exposure field using an example E-beam-written mask. Modifications are determined to formation of mask features to be made using an E-beam mask writer if forming a modified E-beam-written mask having mask features modified from that of the example E-beam-written mask that will improve substrate feature variation identified in the difference map. The E-beam mask writer is programmed using the determined modifications to improve the substrate feature variation identified in the difference map. It is used to form the modified E-beam-written mask having the modified mask features. One or more substrates are photolithographically processed using the modified E-beam-written mask.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: February 24, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Yuan He, Hong Chen, David A. Kewley
  • Patent number: 8956976
    Abstract: A method of processing a semiconductor substrate in forming scribe line alignment marks includes forming pitch multiplied non-circuitry features within scribe line area of a semiconductor substrate. Individual of the features, in cross-section, have a maximum width which is less than a minimum photolithographic feature dimension used in lithographically patterning the substrate. Photoresist is deposited over the features. Such is patterned to form photoresist blocks that are individually received between a respective pair of the features in the cross-section. Individual of the features of the respective pairs have a laterally innermost sidewall in the cross-section. Individual of the photoresist blocks have an opposing pair of first pattern edges in the cross-section that are spaced laterally inward of the laterally innermost sidewalls of the respective pair of the features.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: February 17, 2015
    Assignee: Micron Technology, Inc.
    Inventors: William R. Brown, David Kewley, Adam Olson
  • Publication number: 20150035124
    Abstract: Methods for patterning integrated circuit (IC) device arrays employing an additional mask process for improving center-to-edge CD uniformity are disclosed. In one embodiment, a repeating pattern of features is formed in a masking layer over a first region of a substrate. Then, a blocking mask is applied over the features in the masking layer. The blocking mask is configured to differentiate array regions of the first region from peripheral regions of the first region. Subsequently, the pattern of features in the array regions is transferred into the substrate. In the embodiment, an etchant can be uniformly introduced to the masking layer because there is no distinction of center/edge in the masking layer. Thus, CD uniformity can be achieved in arrays which are later defined.
    Type: Application
    Filed: October 17, 2014
    Publication date: February 5, 2015
    Inventor: David Kewley
  • Patent number: 8889020
    Abstract: Methods for patterning integrated circuit (IC) device arrays employing an additional mask process for improving center-to-edge CD uniformity are disclosed. In one embodiment, a repeating pattern of features is formed in a masking layer over a first region of a substrate. Then, a blocking mask is applied over the features in the masking layer. The blocking mask is configured to differentiate array regions of the first region from peripheral regions of the first region. Subsequently, the pattern of features in the array regions is transferred into the substrate. In the embodiment, an etchant can be uniformly introduced to the masking layer because there is no distinction of center/edge in the masking layer. Thus, CD uniformity can be achieved in arrays which are later defined.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: November 18, 2014
    Assignee: Micron Technology, Inc.
    Inventor: David Kewley
  • Publication number: 20140181763
    Abstract: A method of forming a mask includes creating a difference map between a desired intra-field pattern that is to be formed on substrates and an intra-field signature pattern. The intra-field signature pattern represents a pattern formed on an example substrate by an exposure field using an example E-beam-written mask. Modifications are determined to formation of mask features to be made using an E-beam mask writer if forming a modified E-beam-written mask having mask features modified from that of the example E-beam-written mask that will improve substrate feature variation identified in the difference map. The E-beam mask writer is programmed using the determined modifications to improve the substrate feature variation identified in the difference map. It is used to form the modified E-beam-written mask having the modified mask features. One or more substrates are photolithographically processed using the modified E-beam-written mask.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Yuan He, Hong Chen, David A. Kewley
  • Publication number: 20140154886
    Abstract: A method of processing a semiconductor substrate in forming scribe line alignment marks includes forming pitch multiplied non-circuitry features within scribe line area of a semiconductor substrate. Individual of the features, in cross-section, have a maximum width which is less than a minimum photolithographic feature dimension used in lithographically patterning the substrate. Photoresist is deposited over the features. Such is patterned to form photoresist blocks that are individually received between a respective pair of the features in the cross-section. Individual of the features of the respective pairs have a laterally innermost sidewall in the cross-section. Individual of the photoresist blocks have an opposing pair of first pattern edges in the cross-section that are spaced laterally inward of the laterally innermost sidewalls of the respective pair of the features.
    Type: Application
    Filed: February 4, 2014
    Publication date: June 5, 2014
    Applicant: Micron Technology, Inc.
    Inventors: William R. Brown, David Kewley, Adam Olson
  • Publication number: 20140131784
    Abstract: Some embodiments include a semiconductor construction having a stack containing alternating levels of control gate material and intervening dielectric material. A channel material panel extends through the stack and along a first direction. The panel divides the stack into a first section on a first side of the panel and a second section on a second side of the panel. Memory cell stacks are between the channel material panel and the control gate material. The memory cell stacks include cell dielectric material shaped as containers having open ends pointing toward the channel material panel, and include charge-storage material within the containers. Some embodiments include methods of forming semiconductor constructions.
    Type: Application
    Filed: November 13, 2012
    Publication date: May 15, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Neal L. Davis, David A. Kewley
  • Publication number: 20140117529
    Abstract: Some embodiments include methods of forming electrically conductive lines. Photoresist features are formed over a substrate, with at least one of the photoresist features having a narrowed region. The photoresist features are trimmed, which punches through the narrowed region to form a gap. Spacers are formed along sidewalls of the photoresist features. Two of the spacers merge within the gap. The photoresist features are removed to leave a pattern comprising the spacers. The pattern is extended into the substrate to form a plurality of recesses within the substrate. Electrically conductive material is formed within the recesses to create the electrically conductive lines. Some embodiments include semiconductor constructions having a plurality of lines over a semiconductor substrate. Two of the lines are adjacent to one another and are substantially parallel to one another except in a region wherein said two of the lines merge into one another.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 1, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Vishal Sipani, Kyle Armstrong, Michael D. Hyatt, Michael Dean Van Patten, David A. Kewley, Ming-Chuan Yang
  • Publication number: 20140106280
    Abstract: Methods of lithography, methods for forming patterning tools, and patterning tools are described. One such patterning tool include an active region that forms a first diffraction image on a lens when in use, and an inactive region that forms a second diffraction image on a lens when in use. The inactive region includes a pattern of phase shifting features formed in a substantially transparent material of the patterning tool. Patterning tools and methods, as described, can be used to compensate for lens distortion from effects such as localized heating.
    Type: Application
    Filed: December 16, 2013
    Publication date: April 17, 2014
    Applicant: Micron Technology, Inc.
    Inventors: Jianming Zhou, Scott L. Light, David Kewley, Prasanna Srinivasan, Anton deVilliers
  • Publication number: 20140087558
    Abstract: Some embodiments include methods of forming memory. A series of photoresist features may be formed over a gate stack, and a placeholder may be formed at an end of said series. The placeholder may be spaced from the end of said series by a gap. A layer may be formed over and between the photoresist features, over the placeholder, and within said gap. The layer may be anisotropically etched into a plurality of first vertical structures along edges of the photoresist features, and into a second vertical structure along an edge of the placeholder. A mask may be formed over the second vertical structure. Subsequently, the first vertical structures may be used to pattern string gates while the mask is used to pattern a select gate. Some embodiments include methods of forming conductive runners, and some embodiments may include semiconductor constructions.
    Type: Application
    Filed: December 4, 2013
    Publication date: March 27, 2014
    Applicant: Micron Technology, Inc.
    Inventors: David A. Kewley, Brian Cleereman, Stephen W. Russell, Rex Stone, Anthony C. Krauth
  • Patent number: 8673780
    Abstract: A method of processing a semiconductor substrate in forming scribe line alignment marks includes forming pitch multiplied non-circuitry features within scribe line area of a semiconductor substrate. Individual of the features, in cross-section, have a maximum width which is less than a minimum photolithographic feature dimension used in lithographically patterning the substrate. Photoresist is deposited over the features. Such is patterned to form photoresist blocks that are individually received between a respective pair of the features in the cross-section. Individual of the features of the respective pairs have a laterally innermost sidewall in the cross-section. Individual of the photoresist blocks have an opposing pair of first pattern edges in the cross-section that are spaced laterally inward of the laterally innermost sidewalls of the respective pair of the features.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: March 18, 2014
    Assignee: Micron Technology, Inc.
    Inventors: William R. Brown, David A. Kewley, Adam Olson
  • Patent number: 8609302
    Abstract: Methods of lithography, methods for forming patterning tools, and patterning tools are described. One such patterning tool include an active region that forms a first diffraction image on a lens when in use, and an inactive region that forms a second diffraction image on a lens when in use. The inactive region includes a pattern of phase shifting features formed in a substantially transparent material of the patterning tool. Patterning tools and methods, as described, can be used to compensate for lens distortion from effects such as localized heating.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: December 17, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Jianming Zhou, Scott L. Light, David Kewley, Prasanna Srinivasan, Anton deVilliers
  • Patent number: 8609489
    Abstract: Some embodiments include methods of forming memory. A series of photoresist features may be formed over a gate stack, and a placeholder may be formed at an end of said series. The placeholder may be spaced from the end of said series by a gap. A layer may be formed over and between the photoresist features, over the placeholder, and within said gap. The layer may be anisotropically etched into a plurality of first vertical structures along edges of the photoresist features, and into a second vertical structure along an edge of the placeholder. A mask may be formed over the second vertical structure. Subsequently, the first vertical structures may be used to pattern string gates while the mask is used to pattern a select gate. Some embodiments include methods of forming conductive runners, and some embodiments may include semiconductor constructions.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: December 17, 2013
    Assignee: Micron Technology, Inc.
    Inventors: David A. Kewley, Brian Cleereman, Stephen W. Russell, Rex Stone, Anthony C. Krauth
  • Publication number: 20130295335
    Abstract: Substrates and methods of forming a pattern on a substrate. The pattern includes a repeating pattern region and a pattern-interrupting region adjacent to the repeating pattern region. A mask is formed on the substrate, with the mask including the repeating pattern region and the pattern-interrupting region and which are formed using two separate masking steps. The mask is used in forming the pattern into underlying substrate material on which the mask is received. Substrates comprising masks are also disclosed.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 7, 2013
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Vishal Sipani, David A. Kewley, Kyle Armstrong, Michael Dean Van Patten, Michael D. Hyatt