Patents by Inventor David E. Carlson

David E. Carlson 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: 11006220
    Abstract: A multi-stage mechanical suspension system extends a linear operating range for a loudspeaker and prevents mechanical damage on explosive peaks. The system includes a pair of spaced contact receivers that limit the travel of a contactor. The system provides a flat linear response at low frequencies as the contact receivers are intermittently or occasionally contacted by the contactor during operation of the loudspeaker. The system enables creation of different regions of non-linearity within a total stiffness versus deflection curve of a loudspeaker suspension system. The non-linearity in each region can be controlled individually, so long as the non-linearity by region increases moving away from the rest position. Thus, a plateau of substantially linear stiffness may extend for a large portion of the total displacement allowed for a voice coil and suspension components before a region of non-linear stiffness occurs only at the ends of an allowable excursion to limit the motion.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: May 11, 2021
    Assignee: Robert Bosch GmbH
    Inventors: Alan J. Babb, Andrew M. Grunloh, David E. Carlson
  • Publication number: 20200053471
    Abstract: A multi-stage mechanical suspension system extends a linear operating range for a loudspeaker and prevents mechanical damage on explosive peaks. The system includes a pair of spaced contact receivers that limit the travel of a contactor. The system provides a flat linear response at low frequencies as the contact receivers are intermittently or occasionally contacted by the contactor during operation of the loudspeaker. The system enables creation of different regions of non-linearity within a total stiffness versus deflection curve of a loudspeaker suspension system. The non-linearity in each region can be controlled individually, so long as the non-linearity by region increases moving away from the rest position. Thus, a plateau of substantially linear stiffness may extend for a large portion of the total displacement allowed for a voice coil and suspension components before a region of non-linear stiffness occurs only at the ends of an allowable excursion to limit the motion.
    Type: Application
    Filed: February 3, 2017
    Publication date: February 13, 2020
    Inventors: Alan J. Babb, Andrew M. Grunloh, David E. Carlson
  • Patent number: 10453976
    Abstract: A solar cell structure may provide a front surface that may include a front passivation layer and front anti-reflective layer. The solar cell structure may provide both contacts on a rear surface. In some cases, the rear surface may optionally provide passivation, doped, and/or transparent conductive oxide layers. The rear surface also provides a multilayer foil assembly (MFA). The MFA provides a first metal foil in electrical communication with doped regions of the rear surface of the substrate, such as base or emitter regions. The MFA may also provide a second metal foil that is spaced apart from the first metal foil by a dielectric layer. The metal foils and dielectric layers may include openings through the entirety of these layers, and these openings may be utilized to form contacts electrically coupled to the second metal foil, which is electrically isolated from the first metal foil.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: October 22, 2019
    Assignee: NATCORE TECHNOLOGY, INC.
    Inventors: David E. Carlson, David Howard Levy
  • Patent number: 10290750
    Abstract: A solar cell structure may provide a front surface that may include a front passivation layer and front anti-reflective layer. The solar cell structure may provide both contacts on a rear surface. In some cases, the rear surface may optionally provide passivation, doped, and/or transparent conductive oxide layers. The rear surface also provides a multilayer foil assembly (MFA). The MFA provides a first metal foil in electrical communication with doped regions of the rear surface of the substrate, such as base or emitter regions. The MFA may also provide a second metal foil that is spaced apart from the first metal foil by a dielectric layer. The first metal foil and/or the dielectric layer may include openings through the entirety of these layers, and these openings may be utilized to form laser fired contacts electrically coupled to the second metal foil, which is electrically isolated from the first metal foil.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: May 14, 2019
    Assignee: Natcore Technology, Inc.
    Inventors: David E. Carlson, David Howard Levy
  • Publication number: 20180366597
    Abstract: A solar cell structure may provide a front surface that may include a front passivation layer and front anti-reflective layer. The solar cell structure may provide both contacts on a rear surface. In some cases, the rear surface may optionally provide passivation, doped, and/or transparent conductive oxide layers. The rear surface also provides a multilayer foil assembly (MFA). The MFA provides a first metal foil in electrical communication with doped regions of the rear surface of the substrate, such as base or emitter regions. The MFA may also provide a second metal foil that is spaced apart from the first metal foil by a dielectric layer. The metal foils and dielectric layers may include openings through the entirety of these layers, and these openings may be utilized to form contacts electrically coupled to the second metal foil, which is electrically isolated from the first metal foil.
    Type: Application
    Filed: June 19, 2018
    Publication date: December 20, 2018
    Applicant: Natcore Technology, Inc.
    Inventors: David E. Carlson, David Howard Levy
  • Patent number: 9837561
    Abstract: An interdigitated solar cell may provide a heterojunction or tunnel junction emitter and base contacts that comprise laser processed regions that electrically couple the base contact to a substrate. Methods for manufacturing such solar cells to provide interdigitated back contacts may utilize laser processing to form laser processed regions that are isolated from the emitter. Laser processing may include laser-doping, laser-firing, laser-transfer, laser-transfer doping, laser contacting, and/or gas immersion laser doping.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: December 5, 2017
    Assignee: Natcore Technology, Inc.
    Inventors: David Howard Levy, David E. Carlson
  • Patent number: 9825199
    Abstract: A laser processing system can be utilized to produce high-performance interdigitated back contact (IBC) solar cells. The laser processing system can be utilized to ablate, transfer material, and/or laser-dope or laser fire contacts. Laser ablation can be utilized to remove and pattern openings in a passivated or emitter layer. Laser transferring may then be utilized to transfer dopant and/or contact materials to the patterned openings, thereby forming an interdigitated finger pattern. The laser processing system may also be utilized to plate a conductive material on top of the transferred dopant or contact materials.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: November 21, 2017
    Assignee: NATCORE TECHNOLOGY, INC.
    Inventor: David E. Carlson
  • Publication number: 20170110623
    Abstract: A laser processing system can be utilized to produce high-performance interdigitated back contact (IBC) solar cells. The laser processing system can be utilized to ablate, transfer material, and/or laser-dope or laser fire contacts. Laser ablation can be utilized to remove and pattern openings in a passivated or emitter layer. Laser transferring may then be utilized to transfer dopant and/or contact materials to the patterned openings, thereby forming an interdigitated finger pattern. The laser processing system may also be utilized to plate a conductive material on top of the transferred dopant or contact materials.
    Type: Application
    Filed: December 28, 2016
    Publication date: April 20, 2017
    Applicant: Natcore Technology, Inc.
    Inventor: David E. Carlson
  • Publication number: 20170062633
    Abstract: A solar cell structure may provide a front surface that may include a front passivation layer and front anti-reflective layer. The solar cell structure may provide both contacts on a rear surface. In some cases, the rear surface may optionally provide passivation, doped, and/or transparent conductive oxide layers. The rear surface also provides a multilayer foil assembly (MFA). The MFA provides a first metal foil in electrical communication with doped regions of the rear surface of the substrate, such as base or emitter regions. The MFA may also provide a second metal foil that is spaced apart from the first metal foil by a dielectric layer. The first metal foil and/or the dielectric layer may include openings through the entirety of these layers, and these openings may be utilized to form laser fired contacts electrically coupled to the second metal foil, which is electrically isolated from the first metal foil.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 2, 2017
    Applicant: Natcore Technology, Inc.
    Inventors: David E. Carlson, David Howard Levy
  • Patent number: 9570638
    Abstract: A laser processing system can be utilized to produce high-performance interdigitated back contact (IBC) solar cells. The laser processing system can be utilized to ablate, transfer material, and/or laser-dope or laser fire contacts. Laser ablation can be utilized to remove and pattern openings in a passivated or emitter layer. Laser transferring may then be utilized to transfer dopant and/or contact materials to the patterned openings, thereby forming an interdigitated finger pattern. The laser processing system may also be utilized to plate a conductive material on top of the transferred dopant or contact materials.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: February 14, 2017
    Assignee: NATCORE TECHNOLOGY, INC.
    Inventor: David E. Carlson
  • Publication number: 20160268455
    Abstract: An interdigitated solar cell may provide a heterojunction or tunnel junction emitter and base contacts that comprise laser processed regions that electrically couple the base contact to a substrate. Methods for manufacturing such solar cells to provide interdigitated back contacts may utilize laser processing to form laser processed regions that are isolated from the emitter. Laser processing may include laser-doping, laser-firing, laser-transfer, laser-transfer doping, laser contacting, and/or gas immersion laser doping.
    Type: Application
    Filed: March 14, 2016
    Publication date: September 15, 2016
    Applicant: Natcore Technology, Inc.
    Inventors: David Howard Levy, David E. Carlson
  • Publication number: 20160020343
    Abstract: A laser processing system can be utilized to produce high-performance interdigitated back contact (IBC) solar cells. The laser processing system can be utilized to ablate, transfer material, and/or laser-dope or laser fire contacts. Laser ablation can be utilized to remove and pattern openings in a passivated or emitter layer. Laser transferring may then be utilized to transfer dopant and/or contact materials to the patterned openings, thereby forming an interdigitated finger pattern. The laser processing system may also be utilized to plate a conductive material on top of the transferred dopant or contact materials.
    Type: Application
    Filed: July 15, 2015
    Publication date: January 21, 2016
    Applicant: Natcore Technology, Inc.
    Inventor: David E. Carlson
  • Publication number: 20130178011
    Abstract: Dopant compositions comprising a semiconductor material are described. Examples of dopant compositions comprise a particulate dopant component and a liquid or paste component, or comprise a dopant component and a particulate silicon component. Methods of forming doped regions in a semiconductor substrate material using the dopant compositions are described. A dopant composition including a dopant particulate component is described as a dopant source in a method for the formation of radiation-fired or radiation-doped contacts, for example in the formation of laser-fired or laser-doped contacts. Examples of the method find application in relation to the manufacture of photovoltaic cells. The use of doped particulate material, for example a composition including doped silicon powder, may reduce the likelihood of damage to the substrate.
    Type: Application
    Filed: August 29, 2012
    Publication date: July 11, 2013
    Applicant: ALLIANCE FOR SUSTAINABLE ENERGY, LLC
    Inventors: David S. Ginley, Calvin J. Curtis, Marinus Franciscus Antonius Maria van Hest, Heather A. S. Platt, Alexander Miedaner, David E. Carlson, Murry S. Bennett, Wensheng Ren
  • Patent number: 8057567
    Abstract: Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units, such as breather caps. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate and/or fluid mist load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: November 15, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: David M. Webb, David E. Carlson, Robert M Rogers, Keh B. Dema
  • Patent number: 7837754
    Abstract: A filter element includes a first, outer tubular construction of filter media defining a first open filter interior; a second, inner tuber construction of filter media defining a second open filter interior; the second construction of filter media being located within the first open filter interior and being radially spaced from the first construction of filter media; and the second open filter interior defines an unfiltered fluid channel. A plastic inner liner is within the first open filter interior to support the first construction of filter media. A plastic outer liner is within the first open filter interior to support the second construction of filter media. A filtered fluid channel is defined between the inner liner and the outer liner. A brace arrangement is between the first and second tubular constructions. The brace arrangement can include a spring, a plurality of gussets, or a solid spacer.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: November 23, 2010
    Assignee: Donaldson Company, Inc.
    Inventors: Philip Edward Johnson, David Meline Webb, Paul Stewart Booth, David E. Carlson
  • Publication number: 20100243041
    Abstract: This invention relates to an apparatus and a method for solar cells with laser fired contacts in thermally diffused doped regions. The cell includes a doped wafer and a plurality of first highly doped regions having a first conductivity type. The cell also includes a plurality of second highly doped regions having an opposite conductivity type from the first conductivity type and a passivation layer disposed over at least a portion of each the plurality of first highly doped regions and the plurality of second highly doped regions. The cell also includes a network of conductors having a first conductor and a second conductor, and a plurality of contacts electrically connecting the first highly doped regions with the first conductor and electrically connecting the second highly doped regions with the second conductor.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 30, 2010
    Applicant: BP Corporation North America Inc.
    Inventors: David E. Carlson, Lian Zou, Murray S. Bennett, George Hmung
  • Publication number: 20100140558
    Abstract: This invention relates to an apparatus and a method of use for a top-down directional solidification system, such as for casting solar grade silicon. The invention includes a vessel with a pressure relieving device to prevent pressure build up in the liquid as the solidification front advances from a downward direction. The invention also includes a drain to remove impurities, such as the concentration in the remaining liquid phase as casting nears completion.
    Type: Application
    Filed: December 2, 2009
    Publication date: June 10, 2010
    Applicant: BP Corporation North America Inc.
    Inventors: David E. Carlson, Nathan G. Stoddard
  • Publication number: 20100084009
    Abstract: A photovoltaic cell comprising a semiconductor wafer comprising a front, light receiving surface and an opposite back surface, a passivation layer on at least the back surface, a doped layer opposite in conductivity type to the wafer over the passivation layer, an induced inversion layer, a dielectric layer over the doped layer, and one or more localized emitter contacts and one or more localized base contacts on at least the back surface extending at least through the dielectric layer; and a neutral surface photovoltaic cell comprising a semiconductor wafer comprising a front, light receiving surface and an opposite back surface, neutral passivation layer on at least the back surface, a dielectric layer over the passivation layer, and one or more localized emitter contacts and one or more localized base contacts on at least the back surface extending at least through the dielectric layer.
    Type: Application
    Filed: March 14, 2008
    Publication date: April 8, 2010
    Applicant: BP Corporation North America Inc.
    Inventors: David E. Carlson, Murray S. Bennett
  • Publication number: 20100006514
    Abstract: A filter element includes a first, outer tubular construction of filter media defining a first open filter interior; a second, inner tuber construction of filter media defining a second open filter interior; the second construction of filter media being located within the first open filter interior and being radially spaced from the first construction of filter media; and the second open filter interior defines an unfiltered fluid channel. A plastic inner liner is within the first open filter interior to support the first construction of filter media. A plastic outer liner is within the first open filter interior to support the second construction of filter media. A filtered fluid channel is defined between the inner liner and the outer liner. A brace arrangement is between the first and second tubular constructions. The brace arrangement can include a spring, a plurality of gussets, or a solid spacer.
    Type: Application
    Filed: August 25, 2009
    Publication date: January 14, 2010
    Applicant: Donaldson Company, Inc.
    Inventors: Philip Edward Johnson, David Meline Webb, Paul Stewart Booth, David E. Carlson
  • Patent number: 7597734
    Abstract: A filter element includes a first, outer tubular construction of filter media defining a first open filter interior; a second, inner tuber construction of filter media defining a second open filter interior; the second construction of filter media being located within the first open filter interior and being radially spaced from the first construction of filter media; and the second open filter interior defines an unfiltered fluid channel. A plastic inner liner is within the first open filter interior to support the first construction of filter media. A plastic outer liner is within the first open filter interior to support the second construction of filter media. A filtered fluid channel is defined between the inner liner and the outer liner. A brace arrangement is between the first and second tubular constructions. The brace arrangement can include a spring, a plurality of gussets, or a solid spacer.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: October 6, 2009
    Assignee: Donaldson Company, Inc.
    Inventors: Philip Edward Johnson, David Meline Webb, Paul Stewart Booth, David E. Carlson