Patents by Inventor Mulugeta Zerfu Wudu
Mulugeta Zerfu Wudu 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).
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Patent number: 10158031Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: GrantFiled: November 12, 2014Date of Patent: December 18, 2018Assignee: Beijing Apollo Ding Rong Solar Technology Co., LTD.Inventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Publication number: 20170288078Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: ApplicationFiled: March 29, 2017Publication date: October 5, 2017Inventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Patent number: 9620660Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: GrantFiled: March 26, 2013Date of Patent: April 11, 2017Assignee: Beijing Apollo Ding Rong Solar Technology Co., Ltd.Inventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Publication number: 20150136199Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: ApplicationFiled: November 12, 2014Publication date: May 21, 2015Inventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Patent number: 8912429Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: GrantFiled: March 20, 2008Date of Patent: December 16, 2014Assignee: Hanergy Holding Group Ltd.Inventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Patent number: 8586398Abstract: Provided herein are methods of incorporating additives into thin-film solar cell substrates and back contacts. In certain embodiments, sodium is incorporated into a substrate or a back contact of a thin-film photovoltaic stack where it can diffuse into a CIGS or other absorber layer to improve efficiency and/or growth of the layer. The methods involve laser treating the substrate or back contact in the presence of a sodium (or sodium-containing) solid or vapor to thereby incorporate sodium into the surface of the substrate or back contact. In certain embodiments, the surface is simultaneously smoothed.Type: GrantFiled: June 22, 2010Date of Patent: November 19, 2013Assignee: MiasoleInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Publication number: 20130276855Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: ApplicationFiled: March 26, 2013Publication date: October 24, 2013Inventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Patent number: 8546172Abstract: Provided herein are methods of polishing, cleaning and texturing back contacts of thin-film solar cells. According to various embodiments, the methods involve irradiating sites on the back contact with laser beams to remove contaminants and/or smooth the surface of the back contact. The back contact, e.g., a molybdenum, copper, or niobium thin-film, is smoothed prior to deposition of the absorber and other thin-films of the photovoltaic stack. In certain embodiments, laser polishing of the back contact is used to enhance the diffusion barrier characteristics of the back contact layer, with all or a surface layer of the back contact becoming essentially amorphous. In certain embodiments, the adhesion of the absorber layer is enhanced by the textured back contact and by the presence of the amorphous metal at the deposition surface.Type: GrantFiled: June 22, 2010Date of Patent: October 1, 2013Assignee: MiasoleInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Patent number: 8536054Abstract: Provided herein are methods of polishing and texturing surfaces thin-film photovoltaic cell substrates. The methods involve laser irradiation of a surface having a high frequency roughness in an area of 5-200 microns to form a shallow and rapidly expanding melt pool, followed by rapid cooling of the material surface. The minimization of surface tension causes the surface to re-solidify in a locally smooth surface. the high frequency roughness drops over the surface with a lower frequency bump or texture pattern remaining from the re-solidification.Type: GrantFiled: June 22, 2010Date of Patent: September 17, 2013Assignee: MIASOLEInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Publication number: 20100258542Abstract: Provided herein are methods of polishing, cleaning and texturing back contacts of thin-film solar cells. According to various embodiments, the methods involve irradiating sites on the back contact with laser beams to remove contaminants and/or smooth the surface of the back contact. The back contact, e.g., a molybdenum, copper, or niobium thin-film, is smoothed prior to deposition of the absorber and other thin-films of the photovoltaic stack. In certain embodiments, laser polishing of the back contact is used to enhance the diffusion barrier characteristics of the back contact layer, with all or a surface layer of the back contact becoming essentially amorphous. In certain embodiments, the adhesion of the absorber layer is enhanced by the textured back contact and by the presence of the amorphous metal at the deposition surface.Type: ApplicationFiled: June 22, 2010Publication date: October 14, 2010Applicant: MIASOLEInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Publication number: 20100258982Abstract: Provided herein are methods of polishing and texturing surfaces thin-film photovoltaic cell substrates. The methods involve laser irradiation of a surface having a high frequency roughness in an area of 5-200 microns to form a shallow and rapidly expanding melt pool, followed by rapid cooling of the material surface. The minimization of surface tension causes the surface to re-solidify in a locally smooth surface. the high frequency roughness drops over the surface with a lower frequency bump or texture pattern remaining from the re-solidification.Type: ApplicationFiled: June 22, 2010Publication date: October 14, 2010Applicant: MIASOLEInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Publication number: 20100258185Abstract: Provided herein are textured substrates for thin-film solar cells. According to various embodiments, the textured substrates are characterized by substrate patterns exhibiting low-frequency roughness or flatness and long range order. The substrates may be metallic or non-metallic substrates, and in certain embodiments are stainless steel foils. According to various embodiments, the substrates may be provided in the form of a web, ready for deposition of thin-film photovoltaic stacks. Also provided are textured back contact thin films.Type: ApplicationFiled: June 22, 2010Publication date: October 14, 2010Applicant: MIASOLEInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Publication number: 20100255630Abstract: Provided herein are methods of incorporating additives into thin-film solar cell substrates and back contacts. In certain embodiments, sodium is incorporated into a substrate or a back contact of a thin-film photovoltaic stack where it can diffuse into a CIGS or other absorber layer to improve efficiency and/or growth of the layer. The methods involve laser treating the substrate or back contact in the presence of a sodium (or sodium-containing) solid or vapor to thereby incorporate sodium into the surface of the substrate or back contact. In certain embodiments, the surface is simultaneously smoothed.Type: ApplicationFiled: June 22, 2010Publication date: October 7, 2010Applicant: MIASOLEInventors: Dallas W. Meyer, Jason Stephen Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Publication number: 20100043863Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: ApplicationFiled: September 24, 2009Publication date: February 25, 2010Applicant: MIASOLEInventors: Mulugeta Zerfu Wudu, Jason Stephen Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Publication number: 20090235979Abstract: An interconnect assembly. The interconnect assembly includes a trace that includes a plurality of electrically conductive portions. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. In addition, the plurality of electrically conductive portions is configured such that solar-cell efficiency is substantially undiminished in an event that any one of the plurality of electrically conductive portions is conductively impaired.Type: ApplicationFiled: March 20, 2008Publication date: September 24, 2009Inventors: Mulugeta Zerfu Wudu, Jason Stephan Corneille, Steven Thomas Croft, Steven Douglas Flanders, William James McColl
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Publication number: 20090229666Abstract: A method for smoothing the surface of a metallic substrate. The method includes providing a metallic substrate and smoothing a surface of the metallic substrate by irradiating the surface with a high-intensity energy source, such that the surface is smoothed to remove defects from the surface by creating an altered surface layer. The altered surface layer is configured to receive at least one layer in a fabrication process of an electronic device.Type: ApplicationFiled: March 14, 2008Publication date: September 17, 2009Inventors: Jason Stephan Corneille, Steven Thomas Croft, Mulugeta Zerfu Wudu, William James McColl
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Patent number: 5942279Abstract: A method and apparatus for texturing a landing zone on a substrate of a magnetic disk to reduce stiction between a magnetic transducer head and the disk is provided. The method includes projecting discrete pressurized fluid droplets to impact a substrate surface of the substrate with sufficient momentum to form cavities in a selected annular area of the substrate surface, the selected annular area with cavities therein being of sufficient width to provide a textured landing zone for the magnetic transducer head. A magnetic disk for storing data readable by a transducer head is also provided. The disk includes a rigid substrate. A textured landing zone is provided on the disk for engaging the transducer head. The textured landing zone is formed by the steps of directing a stream of discrete pressurized fluid droplets against the substrate to create roughness therein and moving the substrate and stream of droplets relative to one another in order to create an annular area of roughness.Type: GrantFiled: April 2, 1997Date of Patent: August 24, 1999Assignee: Western Digital CorporationInventor: Mulugeta Zerfu Wudu