Patents by Inventor Christopher Heidelberger

Christopher Heidelberger 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: 20230400652
    Abstract: A III-V/SiNx hybrid integrated photonics platform is described. A wafer can include regions where SiNx waveguides are formed and regions where III-V waveguides have been grown heteroepitaxially from the Si substrate and formed lithographically to butt couple to the SiNx waveguides. Efficient optical coupling is possible between the SiNx and III-V waveguides (?2.5 dB loss/transition). A threading dislocation density (TDD) as low as 4×106 cm?2 can be obtained in the III-V waveguides. The TDD enables fully parallel fabrication of integrated III-V optoelectronic devices, allowing for complex photonic integrated circuits with many active components.
    Type: Application
    Filed: May 15, 2023
    Publication date: December 14, 2023
    Inventors: Christopher Heidelberger, Cheryl Marie SORACE-AGASKAR, Jason PLANT, Boris KHARAS, Reuel B. SWINT, Yifei Li, Paul William JUODAWLKIS
  • Patent number: 10690853
    Abstract: A III-V optoelectronic light emitting device is epitaxially formed on a semiconductor on insulator substrate over a buried waveguide core. The device is optically coupled to the underlying waveguide core. A MOSFET device is formed on a semiconductor substrate beneath the insulator that contains the waveguide core.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: June 23, 2020
    Assignee: International Business Machines Corporation
    Inventors: Ning Li, Devendra K. Sadana, Christopher Heidelberger
  • Patent number: 9865520
    Abstract: A semiconductor device includes a mesa structure having vertical sidewalls, the mesa structure including an active area comprising a portion of its height. A stressed passivation liner is formed on the vertical sidewalls of the mesa structure and over the portion of the active area. The stressed passivation liner induces strain in the active area to permit tuning of performance parameters of the mesa structure.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: January 9, 2018
    Assignee: International Business Machines Corporation
    Inventors: Christopher Heidelberger, Jeehwan Kim, Ning Li, Wencong Liu, Devendra K. Sadana
  • Publication number: 20170040240
    Abstract: A semiconductor device includes a mesa structure having vertical sidewalls, the mesa structure including an active area comprising a portion of its height. A stressed passivation liner is formed on the vertical sidewalls of the mesa structure and over the portion of the active area. The stressed passivation liner induces strain in the active area to permit tuning of performance parameters of the mesa structure.
    Type: Application
    Filed: August 7, 2015
    Publication date: February 9, 2017
    Inventors: Christopher Heidelberger, Jeehwan Kim, Ning Li, Wencong Liu, Devendra K. Sadana