Patents by Inventor John David Hilker

John David Hilker 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: 10450670
    Abstract: Methods for growing a reduced dislocation crystal ingot in an ingot growing system are disclosed. The system has a first crucible with a first base and a first sidewall extending upward from the first base to define an outer cavity. The method includes placing a weir in the outer cavity, placing a second crucible on the weir, placing feedstock material into the outer cavity, and melting the feedstock material to allow movement of the melt from the outer cavity inward of an intermediate cavity and into an inner cavity.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: October 22, 2019
    Assignee: Corner Star Limited
    Inventors: Tirumani N. Swaminathan, Salvador Zepeda, John David Hilker
  • Publication number: 20180080141
    Abstract: Methods for growing a reduced dislocation crystal ingot in an ingot growing system are disclosed. The system has a first crucible with a first base and a first sidewall extending upward from the first base to define an outer cavity. The method includes placing a weir in the outer cavity, placing a second crucible on the weir, placing feedstock material into the outer cavity, and melting the feedstock material to allow movement of the melt from the outer cavity inward of an intermediate cavity and into an inner cavity.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 22, 2018
    Inventors: Tirumani N. Swaminathan, Salvador Zepeda, John David Hilker
  • Publication number: 20180044815
    Abstract: A system for growing an ingot from a melt includes an outer crucible, an inner crucible, and a weir. The outer crucible includes a first sidewall and a first base. The first sidewall and the first base define an outer cavity for containing the melt. The inner crucible is located within the outer cavity, and has a central longitudinal axis. The inner crucible includes a second sidewall and a second base having an opening therein.
    Type: Application
    Filed: October 25, 2017
    Publication date: February 15, 2018
    Inventors: Tirumani N. Swaminathan, John David Hilker, Salvador Zepeda
  • Patent number: 9863062
    Abstract: A system for growing an ingot from a melt includes a first crucible, a second crucible, and a weir. The first crucible has a first base and a first sidewall that form an outer cavity for containing the melt. The weir is located on top of the first base at a location inward from the first sidewall to inhibit movement of the melt from a location outward of the weir to a location inward of the weir. The second crucible is sized for placement within the outer cavity and has a second base and a second sidewall that form an inner cavity. Related methods are also disclosed.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 9, 2018
    Assignee: Corner Star Limited
    Inventors: Tirumani N. Swaminathan, Salvador Zepeda, John David Hilker
  • Patent number: 9822466
    Abstract: A system for growing an ingot from a melt includes an outer crucible, an inner crucible, and a weir. The outer crucible includes a first sidewall and a first base. The first sidewall and the first base define an outer cavity for containing the melt. The inner crucible is located within the outer cavity, and has a central longitudinal axis. The inner crucible includes a second sidewall and a second base having an opening therein. The opening in the second base is concentric with the central longitudinal axis. The weir is disposed between the outer crucible and the inner crucible for supporting the inner crucible.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: November 21, 2017
    Assignee: Corner Star Limited
    Inventors: Tirumani N. Swaminathan, John David Hilker, Salvador Zepeda
  • Publication number: 20150144056
    Abstract: A system for growing an ingot from a melt includes an outer crucible, an inner crucible, and a weir. The outer crucible includes a first sidewall and a first base. The first sidewall and the first base define an outer cavity for containing the melt. The inner crucible is located within the outer cavity, and has a central longitudinal axis. The inner crucible includes a second sidewall and a second base having an opening therein. The opening in the second base is concentric with the central longitudinal axis. The weir is disposed between the outer crucible and the inner crucible for supporting the inner crucible.
    Type: Application
    Filed: November 22, 2013
    Publication date: May 28, 2015
    Inventors: Tirumani N. Swaminathan, John David Hilker, Salvador Zepeda
  • Publication number: 20140261154
    Abstract: A system for growing an ingot from a melt includes a first crucible, a second crucible, and a weir. The first crucible has a first base and a first sidewall that form an outer cavity for containing the melt. The weir is located on top of the first base at a location inward from the first sidewall to inhibit movement of the melt from a location outward of the weir to a location inward of the weir. The second crucible is sized for placement within the outer cavity and has a second base and a second sidewall that form an inner cavity. Related methods are also disclosed.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventors: Tirumani N. Swaminathan, Salvador Zepeda, John David Hilker
  • Publication number: 20140174591
    Abstract: A dopant funnel for loading dopant pellets into a dispenser tube of a dopant dispenser is disclosed. The dopant funnel has a cup connected through a restrictor to a shaft. The cup holds random oriented dopant pellets. The restrictor meters the amount and orientation of dopant pellets being removed from the cup. The shaft is in alignment with the restrictor for delivering dopant pellets from the cup to the dispenser tube.
    Type: Application
    Filed: December 19, 2013
    Publication date: June 26, 2014
    Inventors: John David Hilker, Steven L. Kimbel
  • Publication number: 20140174129
    Abstract: A support fixture for use in a directional solidification system for the production of multi-crystalline ingots having a housing with a passage that extends into an inner assembly having a crucible includes a collar, an alignment bracket, and an arm. The collar has a mounting structure for attaching the collar to the housing. A passage extends through the collar and defines a longitudinal axis. The alignment bracket is in spaced relation to the collar. The arm extends from the collar to the alignment bracket to support the alignment bracket and prevent movement of the alignment bracket with respect to the collar. The arm is shaped to allow an operator access to an area adjacent to the longitudinal axis.
    Type: Application
    Filed: December 21, 2012
    Publication date: June 26, 2014
    Applicant: MEMC SINGAPORE, PTE. LTD (UEN200614797D)
    Inventors: John David Hilker, John Gibbons