Patents by Inventor Lynn Sheehan
Lynn Sheehan 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: 10673198Abstract: Methods, apparatus, and systems comprising a fiber-coupled laser and time-varying beam characteristics. A laser may generate an optical beam that is launched into one or more lengths of fiber, at least one of which comprises a confinement region that is optically coupled to an output. A perturbation device may modulate, through action upon the one or more lengths of fiber, a beam characteristic over a time period during which the laser is energized. A controller may cause the perturbation device to act upon the one or more lengths of fiber to impart a time-averaged beam characteristic and/or to induce a continuous variation in one or more beam characteristics during system use. A process monitor may sense a metric external to the optical system, and a feedback signal from the process monitor may be coupled into the controller. Dynamic beam characteristics may be modulated based on the feedback signal.Type: GrantFiled: March 28, 2018Date of Patent: June 2, 2020Assignee: NLIGHT, INC.Inventors: Dahv A. V. Kliner, Brian Victor, Lynn Sheehan, Aaron Brown
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Patent number: 10656330Abstract: A method for forming an article includes providing a material having a first material property; forming a melt pool by exposing the material to an optical beam having at least one beam characteristic, wherein the melt pool has at least one melt pool property determinative of a second material property of the material; and modifying the at least one beam characteristic in response to a change in the melt pool property.Type: GrantFiled: January 31, 2018Date of Patent: May 19, 2020Assignee: NLIGHT, INC.Inventors: Brian Victor, Robert Martinsen, Lynn Sheehan, Dahv A. V. Kliner, Roger Farrow
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Patent number: 10646963Abstract: A method for forming an article includes: forming a melt pool; exposing the melt pool to an optical beam having at least one beam characteristic; forming a keyhole cavity in the melt pool, the keyhole cavity having at least one keyhole cavity property; and modifying the at least one beam characteristic in response to a change in the keyhole cavity property.Type: GrantFiled: January 31, 2018Date of Patent: May 12, 2020Assignee: NLIGHT, INC.Inventors: Brian Victor, Robert Martinsen, Lynn Sheehan, Roger Farrow, Dahv A. V. Kliner
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Publication number: 20200116926Abstract: A method for forming an article includes providing a material having a first material property; forming a melt pool by exposing the material to an optical beam having at least one beam characteristic, wherein the melt pool has at least one melt pool property determinative of a second material property of the material; and modifying the at least one beam characteristic in response to a change in the melt pool property.Type: ApplicationFiled: January 31, 2018Publication date: April 16, 2020Applicant: nLIGHT, Inc.Inventors: Brian Victor, Robert Martinsen, Lynn Sheehan, Dahv A.V. Kliner, Roger Farrow
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Publication number: 20180287328Abstract: Methods, apparatus, and systems comprising a fiber-coupled laser and time-varying beam characteristics. A laser may generate an optical beam that is launched into one or more lengths of fiber, at least one of which comprises a confinement region that is optically coupled to an output. A perturbation device may modulate, through action upon the one or more lengths of fiber, a beam characteristic over a time period during which the laser is energized. A controller may cause the perturbation device to act upon the one or more lengths of fiber to impart a time-averaged beam characteristic and/or to induce a continuous variation in one or more beam characteristics during system use. A process monitor may sense a metric external to the optical system, and a feedback signal from the process monitor may be coupled into the controller. Dynamic beam characteristics may be modulated based on the feedback signal.Type: ApplicationFiled: March 28, 2018Publication date: October 4, 2018Inventors: Dahv A.V. Kliner, Brian Victor, Lynn Sheehan, Aaron Brown
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Publication number: 20180217412Abstract: An optical beam delivery device, such as an optical fiber, includes: a first length of fiber having a first refractive index profile (RIP) to enable modification of one or more beam characteristics of an optical beam having a first wavelength; and a second length of fiber having at least one wavelength-modifying confinement region and situated to receive the optical beam from the first length of fiber.Type: ApplicationFiled: March 28, 2018Publication date: August 2, 2018Applicant: nLIGHT, Inc.Inventors: Joona KOPONEN, Aaron BROWN, Lynn SHEEHAN, Dahv A.V. KLINER, Roger FARROW
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Publication number: 20180185965Abstract: A method for forming an article includes: forming a melt pool; exposing the melt pool to an optical beam having at least one beam characteristic; forming a keyhole cavity in the melt pool, the keyhole cavity having at least one keyhole cavity property; and modifying the at least one beam characteristic in response to a change in the keyhole cavity property.Type: ApplicationFiled: January 31, 2018Publication date: July 5, 2018Applicant: nLIGHT, Inc.Inventors: Brian Victor, Robert Martinsen, Lynn Sheehan, Roger Farrow, Dahv A. V. Kliner
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Publication number: 20180180803Abstract: A method for forming an article includes providing a material having a first material property; forming a melt pool by exposing the material to an optical beam having at least one beam characteristic, wherein the melt pool has at least one melt pool property determinative of a second material property of the material; and modifying the at least one beam characteristic in response to a change in the melt pool property.Type: ApplicationFiled: January 31, 2018Publication date: June 28, 2018Applicant: nLIGHT, Inc.Inventors: Brian Victor, Robert Martinsen, Lynn Sheehan, Dahv A.V. Kliner, Roger Farrow
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Patent number: 8894868Abstract: A method of forming an aperture (e.g., a through via, a blind via, a trench, an alignment feature, etc.) within a substrate includes irradiating a substrate with a laser beam to form a laser-machined feature having a sidewall. The laser-machined feature is then processed to change at least one characteristic (e.g., the sidewall surface roughness, diameter, taper, aspect ratio, cross-sectional profile, etc.) of the laser-machined feature. The laser-machined feature can be processed to form the aperture by performing an isotropic wet-etch process employing an etchant solution containing HNO3, HF and, optionally acetic acid.Type: GrantFiled: October 6, 2011Date of Patent: November 25, 2014Assignee: Electro Scientific Industries, Inc.Inventors: Andy Hooper, Daragh Finn, Tim Webb, Lynn Sheehan, Kenneth Pettigrew, Yu Chong Tai
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Patent number: 8598490Abstract: Tailored laser pulse shapes are used for processing workpieces. Laser dicing of semiconductor device wafers on die-attach film (DAF), for example, may use different tailored laser pulse shapes for scribing device layers down to a semiconductor substrate, dicing the semiconductor substrate, cutting the underlying DAF, and/or post processing of the upper die edges to increase die break strength. Different mono-shape laser pulse trains may be used for respective recipe steps or passes of a laser beam over a scribe line. In another embodiment, scribing a semiconductor device wafer includes only a single pass of a laser beam along a scribe line using a mixed-shape laser pulse train that includes at least two laser pulses that are different than one another. In addition, or in other embodiments, one or more tailored pulse shapes may be selected and provided to the workpiece on-the-fly. The selection may be based on sensor feedback.Type: GrantFiled: March 31, 2011Date of Patent: December 3, 2013Assignee: Electro Scientific Industries, Inc.Inventors: Andrew Hooper, David Barsic, Kelly J. Bruland, Daragh S. Finn, Lynn Sheehan, Xiaoyuan Peng, Yasu Osako, Jim Dumestre, William J. Jordens
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Patent number: 8540922Abstract: A method of patterning a carbon nanotube layer includes providing a substrate comprising a carbon nanotube layer. A laser beam is generated. The laser beam is directed onto a first surface of the carbon nanotube layer. Relative movement between the laser beam and the first surface is caused, thereby forming at least one cavity feature on the first surface.Type: GrantFiled: August 27, 2007Date of Patent: September 24, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Lynn Sheehan, Kevin Dooley, Rory Jordan
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Publication number: 20130089701Abstract: A method of forming an aperture (e.g., a through via, a blind via, a trench, an alignment feature, etc.) within a substrate includes irradiating a substrate with a laser beam to form a laser-machined feature having a sidewall. The laser-machined feature is then processed to change at least one characteristic (e.g., the sidewall surface roughness, diameter, taper, aspect ratio, cross-sectional profile, etc.) of the laser-machined feature. The laser-machined feature can be processed to form the aperture by performing an isotropic wet-etch process employing an etchant solution containing HNO3, HF and, optionally acetic acid.Type: ApplicationFiled: October 6, 2011Publication date: April 11, 2013Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.Inventors: Andy Hooper, Daragh Finn, Tim Webb, Lynn Sheehan, Kenneth Pettigrew, Yu Chong Tai
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Patent number: 8323439Abstract: To deposit carbon nanotubes onto a substrate, an at least partially porous film is prepared so that a surface of the film has a layer of carbon nanotubes thereon. The film is positioned in relation to a surface of the substrate such that the surface of the film having the layer of carbon nanotubes is brought into contact with the surface of the substrate. Pressure is applied to the film to attach the film, including the layer of carbon nanotubes, to the surface of the substrate.Type: GrantFiled: March 8, 2009Date of Patent: December 4, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kevin Dooley, Ratnesh Kumar Sharma, Lynn Sheehan, Sergio Escobar-Vargas, Anna Fenelon
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Publication number: 20110298156Abstract: Tailored laser pulse shapes are used for processing workpieces. Laser dicing of semiconductor device wafers on die-attach film (DAF), for example, may use different tailored laser pulse shapes for scribing device layers down to a semiconductor substrate, dicing the semiconductor substrate, cutting the underlying DAF, and/or post processing of the upper die edges to increase die break strength. Different mono-shape laser pulse trains may be used for respective recipe steps or passes of a laser beam over a scribe line. In another embodiment, scribing a semiconductor device wafer includes only a single pass of a laser beam along a scribe line using a mixed-shape laser pulse train that includes at least two laser pulses that are different than one another. In addition, or in other embodiments, one or more tailored pulse shapes may be selected and provided to the workpiece on-the-fly. The selection may be based on sensor feedback.Type: ApplicationFiled: March 31, 2011Publication date: December 8, 2011Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.Inventors: Andrew Hooper, David Barsic, Kelly J. Bruland, Daragh S. Finn, Lynn Sheehan, Xiaoyuan Peng, Yasu Osako, Jim Dumestre, William J. Jordens
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Publication number: 20100224354Abstract: To deposit carbon nanotubes onto a substrate, an at least partially porous film is prepared so that a surface of the film has a layer of carbon nanotubes thereon. The film is positioned in relation to a surface of the substrate such that the surface of the film having the layer of carbon nanotubes is brought into contact with the surface of the substrate. Pressure is applied to the film to attach the film, including the layer of carbon nanotubes, to the surface of the substrate.Type: ApplicationFiled: March 8, 2009Publication date: September 9, 2010Inventors: Kevin Dooley, Ratnesh Kumar Sharma, Lynn Sheehan, Sergio Escobar-Vargas, Anna Fenelon
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Publication number: 20090311489Abstract: A method of patterning a carbon nanotube layer includes providing a substrate comprising a carbon nanotube layer. A laser beam is generated. The laser beam is directed onto a first surface of the carbon nanotube layer. Relative movement between the laser beam and the first surface is caused, thereby forming at least one cavity feature on the first surface.Type: ApplicationFiled: August 27, 2007Publication date: December 17, 2009Inventors: Lynn Sheehan, Kevin Dooley, Rory Jordan
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Publication number: 20090061161Abstract: A method of patterning a cross-linked polymer layer includes providing a substrate comprising a cross-linked polymer layer. A laser beam is generated. The laser beam is directed onto a first surface of the polymer layer. Relative movement between the laser beam and the first surface is caused, thereby forming at least one feature on the first surface.Type: ApplicationFiled: August 27, 2007Publication date: March 5, 2009Inventors: LYNN SHEEHAN, KEVIN DOOLEY, RORY JORDAN