Patents by Inventor Dean Levi

Dean Levi 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).

  • In situ optical diagnostic for monitoring or control of sodium diffusion in photovoltaics manufacturing
    Patent number: 9136184
    Abstract: A method of fabricating a photovoltaic device 100, includes the steps of providing a glass substrate 102, depositing a molybdenum layer 104 on a surface of the glass substrate, directing light through the glass substrate to the near-substrate region of the molybdenum layer 206, detecting an optical property of the near-substrate region of the molybdenum layer after interaction with the incident light 208 and determining a density of the near-substrate region of the molybdenum layer from the detected optical property 210. A molybdenum deposition parameter may be controlled based upon the determined density of the near-substrate region of the molybdenum layer 218. A non-contact method measures a density of the near-substrate region of a molybdenum layer and a deposition chamber 300.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: September 15, 2015
    Assignee: Alliance For Sustainable Energy, LLC
    Inventors: Jian Li, Dean Levi, Miguel Contreras, Stephen Glynn
  • IN SITU OPTICAL DIAGNOSTIC FOR MONITORING OR CONTROL OF SODIUM DIFFUSION IN PHOTOVOLTAICS MANUFACTURING
    Publication number: 20140093985
    Abstract: A method of fabricating a photovoltaic device 100, includes the steps of providing a glass substrate 102, depositing a molybdenum layer 104 on a surface of the glass substrate, directing light through the glass substrate to the near-substrate region of the molybdenum layer 206, detecting an optical property of the near-substrate region of the molybdenum layer after interaction with the incident light 208 and determining a density of the near-substrate region of the molybdenum layer from the detected optical property 210. A molybdenum deposition parameter may be controlled based upon the determined density of the near-substrate region of the molybdenum layer 218. A non-contact method measures a density of the near-substrate region of a molybdenum layer and a deposition chamber 300.
    Type: Application
    Filed: February 17, 2012
    Publication date: April 3, 2014
    Applicant: ALLIANCE FOR SUSTAINABLE ENERGY, LLC
    Inventors: Jian Li, Dean Levi, Migual Contreras, Stephen Glynn
  • Optical method for determining the doping depth profile in silicon
    Patent number: 7179665
    Abstract: A method of processing a sample, comprising the steps of: introducing dopant into a sample thereby producing a doped sample; producing a healed sampled including a doping density profile in response to introducing the dopant into the sample; and measuring the doping density profile of the healed sample by performing reflectometry using light generated within the visible wavelength spectrum.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: February 20, 2007
    Assignee: Midwest Research Institute
    Inventor: Dean Levi