Patents by Inventor Lawrence E. Felton

Lawrence E. Felton 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: 8343369
    Abstract: A method of producing a MEMS device removes the bottom side of a device wafer after its movable structure is formed. To that end, the method provides the device wafer, which has an initial bottom side. Next, the method forms the movable structure on the device wafer, and then removes substantially the entire initial bottom side of the device wafer. Removal of the entire initial bottom side effectively forms a final bottom side.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: January 1, 2013
    Assignee: Analog Devices, Inc.
    Inventors: Manolo G. Mena, Elmer S. Lacsamana, William A. Webster, Lawrence E. Felton
  • Publication number: 20110266639
    Abstract: A method of producing a MEMS device removes the bottom side of a device wafer after its movable structure is formed. To that end, the method provides the device wafer, which has an initial bottom side. Next, the method forms the movable structure on the device wafer, and then removes substantially the entire initial bottom side of the device wafer. Removal of the entire initial bottom side effectively forms a final bottom side.
    Type: Application
    Filed: July 14, 2011
    Publication date: November 3, 2011
    Applicant: ANALOG DEVICES, INC.
    Inventors: Manolo G. Mena, Elmer S. Lacsamana, William A. Webster, Lawrence E. Felton
  • Patent number: 7795723
    Abstract: A sensor element is capped by bonding or otherwise forming a cap on a sensor element. The sensor may be hermetically sealed by using a hermetic cap and hermetic bonding material or by applying a hermetic coating. The sensor may be filled with a gas at an elevated pressure. The sensor may alternatively or additionally be filled with a special gas, such as a gas having a density-to-viscosity ratio above approximately 0.2.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: September 14, 2010
    Assignee: Analog Devices, Inc.
    Inventors: Kevin H.-L. Chau, Lawrence E. Felton, John A. Geen, Michael W. Judy, John R. Martin
  • Patent number: 7521363
    Abstract: A method of producing a MEMS device forms structure on a non-standard device wafer. To that end, the method provides the noted non-standard device wafer, which has a wafer outer diameter and a non-standard thickness. As known by those in the art, a standard device wafer has a standard thickness when its outer diameter equals the wafer outer diameter. In illustrative embodiments, however, the non-standard thickness is smaller than the standard thickness. The method then forms structure on the non-standard device wafer.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: April 21, 2009
    Assignee: Analog Devices, Inc.
    Inventors: John R. Martin, Lawrence E. Felton
  • Publication number: 20080225505
    Abstract: A method of producing a MEMS device removes the bottom side of a device wafer after its movable structure is formed. To that end, the method provides the device wafer, which has an initial bottom side. Next, the method forms the movable structure on the device wafer, and then removes substantially the entire initial bottom side of the device wafer. Removal of the entire initial bottom side effectively forms a final bottom side.
    Type: Application
    Filed: May 29, 2008
    Publication date: September 18, 2008
    Applicant: ANALOG DEVICES, INC.
    Inventors: John R. Martin, Manolo G. Mena, Elmer S. Lacsamana, Michael P. Duffy, William A. Webster, Lawrence E. Felton, Maurice S. Karpman
  • Publication number: 20080150104
    Abstract: A package for a micro-electromechanical (MEMS) device is described. A premolded leadframe base has opposing top and bottom surfaces. Each surface is defined by a topology having at least one electrically conductive portion and at least one electrically non-conductive portion, and the topology of the top surface differs from the topology of the bottom surface.
    Type: Application
    Filed: October 19, 2007
    Publication date: June 26, 2008
    Inventors: Michael A. Zimmerman, Keith Smith, Kieran P. Harney, John R. Martin, Lawrence E. Felton
  • Patent number: 7357017
    Abstract: A sensor has a die (with a working portion), a cap coupled with the die to at least partially cover the working portion, and a conductive pathway extending through the cap to the working portion. The pathway provides an electrical interface to the working portion.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: April 15, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Lawrence E. Felton, Kieran P. Harney, Carl M. Roberts
  • Patent number: 7338705
    Abstract: An optically transparent conductive material is disposed directly or indirectly on an inside surface of a cover material for static dissipation in an optical switching device. The optically transparent conductive material forms an electrically continuous film. The optically transparent conductive material can also be used for anti-reflection. An additional coating may be disposed directly or indirectly on an outside surface of the cover material.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: March 4, 2008
    Assignee: Analog Devices, Inc.
    Inventors: John R. Martin, Maurice Karpman, Lawrence E. Felton
  • Patent number: 7275424
    Abstract: A sensor has a die (with a working portion), a cap coupled with the die to at least partially cover the working portion, and a conductive pathway extending through the cap to the working portion. The pathway provides an electrical interface to the working portion.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: October 2, 2007
    Assignee: Analog Devices, Inc.
    Inventors: Lawrence E. Felton, Kieran P. Harncy, Carl M. Roberts
  • Patent number: 7166911
    Abstract: A MEMS inertial sensor is secured within a premolded-type package formed, at least in part, from a low moisture permeable molding material. Consequently, such a motion detector should be capable of being produced more economically than those using ceramic packages. To those ends, the package has at least one wall (having a low moisture permeability) extending from a leadframe to form a cavity, and an isolator (with a top surface) within the cavity. The MEMS inertial sensor has a movable structure suspended above a substrate having a bottom surface. The substrate bottom surface is secured to the isolator top surface at a contact area. In illustrative embodiments, the contact area is less than the surface area of the bottom surface of the substrate. Accordingly, the isolator forms a space between at least a portion of the bottom substrate surface and the package. This space thus is free of the isolator.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: January 23, 2007
    Assignee: Analog Devices, Inc.
    Inventors: Maurice S. Karpman, Nicole Hablutzel, Peter W. Farrell, Michael W. Judy, Lawrence E. Felton, Lewis Long
  • Patent number: 7040922
    Abstract: An electrical interconnect apparatus has a mounting member with a plurality of sides. The mounting member is formed from an insulator as a cuboid. Moreover, the mounting member also may be formed from a flexible circuit. Among other things, the plurality of sides includes an interface side. At least two of the plurality of sides are in electrical communication with the interface side.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: May 9, 2006
    Assignee: Analog Devices, Inc.
    Inventors: Kieran P. Harney, Lawrence E. Felton, Lewis Long
  • Patent number: 7033672
    Abstract: An optically transparent conductive material is used for static dissipation of a cover material for an optical switching device. The optically transparent conductive material is deposited directly or indirectly on the cover material. The optically transparent conductive material forms an electrically continuous film. The optically transparent conductive material can also be used for anti-reflection.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: April 25, 2006
    Assignee: Analog Devices, Inc.
    Inventors: John R. Martin, Maurice Karpman, Lawrence E. Felton
  • Patent number: 6964882
    Abstract: A flip-bonding technique is used to fabricate complex micro-electromechanical systems. Various micromachined structures are fabricated on the front side of each of two wafers. One of the wafers is flipped over and bonded to the other wafer so that the front sides of the two wafers are bonded together in a flip-stacked configuration.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: November 15, 2005
    Assignee: Analog Devices, Inc.
    Inventors: Chang-Han Yun, Lawrence E. Felton, Maurice S. Karpman, John A. Yasaitis, Michael W. Judy, Colin Gormley
  • Patent number: 6940636
    Abstract: In an optical switching apparatus having a mirror structure bonded to a substrate, the gap between the mirror structure and the substrate is controlled by mechanical standoffs placed between the mirror structure and the substrate. The mirror structure is bonded to the substrate using solder. The mechanical standoffs are formed from a material having a higher melting point than that of the solder. The mirror structure is bonded to the substrate under pressure at a temperature between the melting point of the solder and the melting point of the mechanical standoffs.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: September 6, 2005
    Assignee: Analog Devices, Inc.
    Inventor: Lawrence E. Felton
  • Patent number: 6936918
    Abstract: A MEMS device has at least one conductive path extending from the top facing side of its substrate (having MEMS structure) to the bottom side of the noted substrate. The at least one conductive path extends through the substrate as noted to electrically connect the bottom facing side with the MEMS structure.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: August 30, 2005
    Assignee: Analog Devices, Inc.
    Inventors: Kieran P. Harney, Lawrence E. Felton, Thomas Kieran Nunan, Susan A. Alie, Bruce Wachtmann
  • Patent number: 6933163
    Abstract: An intermediate electrode layer is used to fabricate an integrated micro-electromechanical system. An intermediate electrode layer is formed on an integrated circuit wafer. The intermediate electrode layer places drive electrodes a predetermined height above the surface of the integrated circuit wafer. A micro-electromechanical system wafer having micromachined optical mirrors is bonded to the integrated circuit wafer such that the drive electrodes are positioned a predetermined distance from the optical mirrors.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: August 23, 2005
    Assignee: Analog Devices, Inc.
    Inventors: Chang-Han Yun, Lawrence E. Felton, Maurice S. Karpman, John A. Yasaitis, Michael W. Judy, Colin Gormley
  • Patent number: 6931170
    Abstract: A fiber-attached optical device with in-plane micromachined mirrors includes a cover having at least one reflector formed on one side and a substrate having a plurality of micromachined optical mirrors formed substantially on a single plane on a side facing toward the mirrored side of the cover. The micromachined optical mirrors are controllable to reflect optical signals between a plurality of optical fiber segments via the at least one reflector. The plurality of optical fiber segments can be attached to either the cover or the substrate so as to form an integrated package including the substrate, the cover, and the plurality of optical fiber segments. The mirrors can be controlled to variably attenuate the optical signals.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: August 16, 2005
    Assignee: Analog Devices, Inc.
    Inventors: Chang-Han Yun, Shanti Bhattacharya, Yakov Reznichenko, John R. Martin, Lawrence E. Felton, Jeffrey Swift, Kieran P. Harney, Michael W. Judy
  • Patent number: 6893574
    Abstract: A MEMS capping method and apparatus uses a cap structure on which is formed a MEMS cavity, a cut capture cavity, and a cap wall. The cap wall is essentially the outer wall of the MEMS cavity and the inner wall of the cut capture cavity. The cap structure is bonded onto a MEMS structure such that the MEMS cavity covers protected MEMS components. The cap structure is trimmed by cutting through to the cut capture cavity from the top of the cap structure without cutting all the way through to the MEMS structure.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: May 17, 2005
    Inventors: Lawrence E. Felton, Peter W. Farrell, Jing Luo, David J. Collins, John R. Martin, William A. Webster
  • Publication number: 20040244510
    Abstract: A motion sensor has a mounting member with a plurality of mounting surfaces, and a plurality of motion sensor devices mounted to two or more of the mounting surfaces.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 9, 2004
    Inventors: Kieran P. Harney, Lawrence E. Felton, Lewis Long
  • Patent number: 6759273
    Abstract: A wafer cap protects micro electromechanical system (“MEMS”) structures during a dicing of a MEMS wafer to produce individual MEMS dies. A MEMS wafer is prepared having a plurality of MEMS structure sites thereon. Upon the MEMS wafer, the wafer cap is mounted to produce a laminated MEMS wafer. The wafer cap is recessed in areas corresponding to locations of the MEMS structure sites on the MEMS wafer. The capped MEMS wafer can be diced into a plurality of MEMS dies without causing damage to or contaminating the MEMS die.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: July 6, 2004
    Assignee: Analog Devices, Inc.
    Inventors: Lawrence E. Felton, Jing Luo