Patents by Inventor H. Chao

H. Chao 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: 11712583
    Abstract: A radiation delivery system includes a radiation source to generate a radiation beam to deliver to a target and a multi-leaf collimator (MLC) operatively coupled to the radiation source, wherein the MLC is offset to shift the MLC in a direction relative to a line from the radiation source to a point of interest to cause projections of the radiation beam to be shifted based on the offset.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: August 1, 2023
    Assignee: Accuray Incorporated
    Inventors: Edward H. Chao, Eric Schnarr, Dylan Casey
  • Publication number: 20210402216
    Abstract: A radiation delivery system includes a radiation source to generate a radiation beam to deliver to a target and a multi-leaf collimator (MLC) operatively coupled to the radiation source, wherein the MLC is offset to shift the MLC in a direction relative to a line from the radiation source to a point of interest to cause projections of the radiation beam to be shifted based on the offset.
    Type: Application
    Filed: June 30, 2020
    Publication date: December 30, 2021
    Inventors: Edward H. Chao, Eric Schnarr, Dylan Casey
  • Patent number: 10930793
    Abstract: Provided is a nanosheet semiconductor device. In embodiments of the invention, the nanosheet semiconductor device includes a channel nanosheet formed over a substrate. The nanosheet semiconductor device includes a buffer layer formed between the substrate and the channel nanosheet. The buffer layer has a lower conductivity than the channel nanosheet.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 23, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robin H. Chao, Choonghyun Lee, Chun W. Yeung, Jingyun Zhang
  • Patent number: 10804410
    Abstract: Provided is a nanosheet semiconductor device. In embodiments of the invention, the nanosheet semiconductor device includes a channel nanosheet formed over a substrate. The nanosheet semiconductor device includes a buffer layer formed between the substrate and the channel nanosheet. The buffer layer has a lower conductivity than the channel nanosheet.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: October 13, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robin H. Chao, Choonghyun Lee, Chun W. Yeung, Jingyun Zhang
  • Publication number: 20200254291
    Abstract: Provided is a foamed dust composition and a method of using the foamed dust composition. The foamed dust composition contains an aqueous foam comprising a foaming agent, a foam stabilizer, water, and a rock dust. The foamed dust composition is sprayed onto coal mine surfaces to prevent coal dust explosion in the event of a fire.
    Type: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Inventor: Yen-Yau H. CHAO
  • Patent number: 10319676
    Abstract: Embodiments are directed to a method and resulting structures for forming a semiconductor device having a vertically integrated nanosheet fuse. A nanosheet stack is formed on a substrate. The nanosheet stack includes a semiconductor layer formed between an upper nanosheet and a lower nanosheet. The semiconductor layer is modified such that an etch rate of the modified semiconductor layer is greater than an etch rate of the upper and lower nanosheets when exposed to an etchant. Portions of the modified semiconductor layer are removed to form a cavity between the upper and lower nanosheets and a silicide region is formed in the upper nanosheet.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: June 11, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robin H. Chao, James J. Demarest, Nicolas J. Loubet
  • Patent number: 10243060
    Abstract: Embodiments are directed to a method of forming a stacked nanosheet and resulting structures having uniform low-k inner spacers. A nanosheet stack is formed opposite a major surface of a substrate. The nanosheet stack includes multiple nanosheets. Cavities are formed between adjacent ones of the multiple nanosheets. The cavities are filled with an oxide material and portions of the oxide material are nitridized to form inner spacers positioned between the adjacent ones of the multiple nanosheets.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 26, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robin H. Chao, ChoongHyun Lee, Chun W. Yeung, Jingyun Zhang
  • Publication number: 20180308988
    Abstract: Provided is a nanosheet semiconductor device. In embodiments of the invention, the nanosheet semiconductor device includes a channel nanosheet formed over a substrate. The nanosheet semiconductor device includes a buffer layer formed between the substrate and the channel nanosheet. The buffer layer has a lower conductivity than the channel nanosheet.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 25, 2018
    Inventors: Robin H. Chao, Choonghyun Lee, Chun W. Yeung, Jingyun Zhang
  • Publication number: 20180308986
    Abstract: Provided is a nanosheet semiconductor device. In embodiments of the invention, the nanosheet semiconductor device includes a channel nanosheet formed over a substrate. The nanosheet semiconductor device includes a buffer layer formed between the substrate and the channel nanosheet. The buffer layer has a lower conductivity than the channel nanosheet.
    Type: Application
    Filed: April 21, 2017
    Publication date: October 25, 2018
    Inventors: Robin H. Chao, Choonghyun Lee, Chun W. Yeung, Jingyun Zhang
  • Publication number: 20180277656
    Abstract: Embodiments are directed to a method of forming a stacked nanosheet and resulting structures having uniform low-k inner spacers. A nanosheet stack is formed opposite a major surface of a substrate. The nanosheet stack includes multiple nanosheets. Cavities are formed between adjacent ones of the multiple nanosheets. The cavities are filled with an oxide material and portions of the oxide material are nitridized to form inner spacers positioned between the adjacent ones of the multiple nanosheets.
    Type: Application
    Filed: March 24, 2017
    Publication date: September 27, 2018
    Inventors: Robin H. Chao, ChoongHyun Lee, Chun W. Yeung, Jingyun Zhang
  • Patent number: 10043748
    Abstract: Embodiments are directed to a method and resulting structures for forming a semiconductor device having a vertically integrated nanosheet fuse. A nanosheet stack is formed on a substrate. The nanosheet stack includes a semiconductor layer formed between an upper nanosheet and a lower nanosheet. The semiconductor layer is modified such that an etch rate of the modified semiconductor layer is greater than an etch rate of the upper and lower nanosheets when exposed to an etchant. Portions of the modified semiconductor layer are removed to form a cavity between the upper and lower nanosheets and a silicide region is formed in the upper nanosheet.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: August 7, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robin H. Chao, James J. Demarest, Nicolas J. Loubet
  • Publication number: 20180218978
    Abstract: Embodiments are directed to a method and resulting structures for forming a semiconductor device having a vertically integrated nanosheet fuse. A nanosheet stack is formed on a substrate. The nanosheet stack includes a semiconductor layer formed between an upper nanosheet and a lower nanosheet. The semiconductor layer is modified such that an etch rate of the modified semiconductor layer is greater than an etch rate of the upper and lower nanosheets when exposed to an etchant. Portions of the modified semiconductor layer are removed to form a cavity between the upper and lower nanosheets and a silicide region is formed in the upper nanosheet.
    Type: Application
    Filed: November 13, 2017
    Publication date: August 2, 2018
    Inventors: Robin H. Chao, James J. Demarest, Nicolas J. Loubet
  • Publication number: 20180218979
    Abstract: Embodiments are directed to a method and resulting structures for forming a semiconductor device having a vertically integrated nanosheet fuse. A nanosheet stack is formed on a substrate. The nanosheet stack includes a semiconductor layer formed between an upper nanosheet and a lower nanosheet. The semiconductor layer is modified such that an etch rate of the modified semiconductor layer is greater than an etch rate of the upper and lower nanosheets when exposed to an etchant. Portions of the modified semiconductor layer are removed to form a cavity between the upper and lower nanosheets and a silicide region is formed in the upper nanosheet.
    Type: Application
    Filed: March 16, 2018
    Publication date: August 2, 2018
    Inventors: Robin H. Chao, James J. Demarest, Nicolas J. Loubet
  • Patent number: 9978678
    Abstract: Embodiments are directed to a method and resulting structures for forming a semiconductor device having a vertically integrated nanosheet fuse. A nanosheet stack is formed on a substrate. The nanosheet stack includes a semiconductor layer formed between an upper nanosheet and a lower nanosheet. The semiconductor layer is modified such that an etch rate of the modified semiconductor layer is greater than an etch rate of the upper and lower nanosheets when exposed to an etchant. Portions of the modified semiconductor layer are removed to form a cavity between the upper and lower nanosheets and a silicide region is formed in the upper nanosheet.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: May 22, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robin H. Chao, James J. Demarest, Nicolas J. Loubet
  • Patent number: 9676800
    Abstract: Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using multistage countercurrent liquid-liquid extraction. Recovery is enhanced with one or more method steps. In a first step, a portion of the heavy phase from the settling section of the first stage is recycled to the settling section of the first stage. In a second step, a portion of the light phase from the settling section of the first stage is recycled to the mixing section of the first stage. In a third step, the first stage takes place in a mixer-settler, a Lewis base is introduced into the settling section of the first stage, and a complex of Lewis acid and Lewis base is formed in this settling section. In a fourth step, a polyamine is added to the first stage.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: June 13, 2017
    Assignee: INVISTA NORTH AMERICA S.A.R.L.
    Inventors: William J. Tenn, III, Sudhir N. V. K. Aki, Thomas E. Vos, Tseng H. Chao
  • Patent number: 9631320
    Abstract: An anti-foaming agent containing (A) an organopolysiloxane and a finely powdered inorganic filler, (B) a polyoxyalkylene group-containing branched chain organopolysiloxane, and (C) an anionic surfactant. This anti-foaming agent exhibits stable anti-foaming performance even at high temperatures that reach, for example, 80QC or under strongly alkaline conditions and produces no aggregates.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: April 25, 2017
    Assignees: Dow Corning Corporation, Dow Corning Toray Co., Ltd.
    Inventors: Sung-Hsuen H. Chao, Alain Hilberer, Masakado Kennoki, Jianren Zeng
  • Patent number: 9388204
    Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: July 12, 2016
    Assignee: INVISTA North America S.a.r.l.
    Inventors: William J. Tenn, III, Sudhir N. V. K. Aki, Thomas E. Vos, Tseng H. Chao
  • Publication number: 20160083406
    Abstract: Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.
    Type: Application
    Filed: December 8, 2015
    Publication date: March 24, 2016
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: William J. TENN, III, Sudhir N.V.K. AKI, Thomas E. VOS, Tseng H. CHAO
  • Patent number: 9169197
    Abstract: An improved multi-reaction zone process provides improved nitrile product quality and yield. In a first reaction zone, 1,3-butadiene is reacted with hydrogen cyanide in the presence of a catalyst to produce pentenenitriles comprising 3-pentenenitrile and 2-methyl-3-butenenitrile. In a second reaction zone, 2-methyl-3-butenenitrile, recovered from the first reaction zone, is isomerized to 3-pentenenitrile. In a third reaction zone, 3-pentenenitrile recovered from the first and second reaction zones is reacted with hydrogen cyanide in the presence of a catalyst and a Lewis acid to produce adiponitrile. Unwanted production and build-up of dinitriles, including methylglutaronitrile, in the first reaction zone for the hydrocyanation of 1,3-butadiene is prevented by limiting the flow of Lewis acid into the first reaction zone.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: October 27, 2015
    Assignee: INVISTA NORTH AMERICA S.A. R.L.
    Inventors: Larry E. Moerbe, Tseng H. Chao
  • Patent number: 9133107
    Abstract: Adiponitrile is made by reacting 3-pentenenitrile with hydrogen cyanide. The 3-pentenenitrile is made by reacting 1,3-butadiene with hydrogen cyanide. The catalyst for the reaction of 1,3-butadiene with hydrogen cyanide to make 3-pentenenitrile is recycled. At least a portion of the recycled catalyst is purified by an extraction process, which separates catalyst degradation products and reaction byproducts, such as mononitriles having 9 carbon atoms, from the catalyst.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: September 15, 2015
    Assignee: INVISTA North America S.a.r.l.
    Inventors: Larry E. Moerbe, Tseng H. Chao