Patents by Inventor Thomas D. Chen

Thomas D. Chen 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: 9338559
    Abstract: A microphone system has a package with an interior chamber and an inlet aperture for receiving an acoustic signal, and a microphone die having a backplate and a diaphragm. The microphone is positioned within the package interior to form a front volume between the diaphragm and the inlet aperture. Accordingly, the microphone is positioned to form a back volume defined in part by the diaphragm within the interior chamber. The system also has a stop member positioned in the back volume so that the diaphragm is between the stop member and the backplate.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: May 10, 2016
    Assignee: INVENSENSE, INC.
    Inventors: Jicheng Yang, Lee J. Jacobson, Sushil Bharatan, Thomas D. Chen
  • Patent number: 9219963
    Abstract: A dual backplate MEMS microphone system includes a flexible diaphragm sandwiched between two single-crystal silicon backplates. Such a MEMS microphone system may be formed by fabricating each backplate in a separate wafer, and then transferring one backplate from its wafer to the other wafer, to form two separate capacitors with the diaphragm.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: December 22, 2015
    Assignee: INVENSENSE, INC.
    Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
  • Publication number: 20150264465
    Abstract: A MEMS microphone has a stationary portion with a backplate having a plurality of apertures, and a diaphragm spaced from the backplate and having an outer periphery. As a condenser microphone, the diaphragm and backplate form a variable capacitor. The microphone also has a post extending between, and substantially permanently connected with, both the backplate and the diaphragm, and a set of springs securing the diaphragm to at least one of the post and the stationary portion. The post is positioned to be radially inward of the outer periphery of the diaphragm.
    Type: Application
    Filed: May 29, 2015
    Publication date: September 17, 2015
    Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
  • Patent number: 9078069
    Abstract: A MEMS microphone has a stationary portion with a backplate having a plurality of apertures, and a diaphragm spaced from the backplate and having an outer periphery. As a condenser microphone, the diaphragm and backplate form a variable capacitor. The microphone also has a post extending between, and substantially permanently connected with, both the backplate and the diaphragm, and a set of springs securing the diaphragm to at least one of the post and the stationary portion. The post is positioned to be radially inward of the outer periphery of the diaphragm.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: July 7, 2015
    Assignee: INVENSENSE, INC.
    Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
  • Publication number: 20140307909
    Abstract: A microphone system has a package with an interior chamber and an inlet aperture for receiving an acoustic signal, and a microphone die having a backplate and a diaphragm. The microphone is positioned within the package interior to form a front volume between the diaphragm and the inlet aperture. Accordingly, the microphone is positioned to form a back volume defined in part by the diaphragm within the interior chamber. The system also has a stop member positioned in the back volume so that the diaphragm is between the stop member and the backplate.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 16, 2014
    Applicant: Invensense, Inc.
    Inventors: Jicheng Yang, Lee J. Jacobson, Sushil Bharatan, Thomas D. Chen
  • Publication number: 20140072152
    Abstract: A dual backplate MEMS microphone system includes a flexible diaphragm sandwiched between two single-crystal silicon backplates. Such a MEMS microphone system may be formed by fabricating each backplate in a separate wafer, and then transferring one backplate from its wafer to the other wafer, to form two separate capacitors with the diaphragm.
    Type: Application
    Filed: November 20, 2013
    Publication date: March 13, 2014
    Applicant: Invensense, Inc.
    Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
  • Patent number: 8590136
    Abstract: A dual backplate MEMS microphone system including a flexible diaphragm sandwiched between two single-crystal silicon backplates may be formed by fabricating each backplate in a separate wafer, and then transferring one backplate from its wafer to the other wafer, to form two separate capacitors with the diaphragm.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: November 26, 2013
    Assignee: Analog Devices, Inc.
    Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
  • Publication number: 20130177180
    Abstract: A MEMS microphone has a stationary portion with a backplate having a plurality of apertures, and a diaphragm spaced from the backplate and having an outer periphery. As a condenser microphone, the diaphragm and backplate form a variable capacitor. The microphone also has a post extending between, and substantially permanently connected with, both the backplate and the diaphragm, and a set of springs securing the diaphragm to at least one of the post and the stationary portion. The post is positioned to be radially inward of the outer periphery of the diaphragm.
    Type: Application
    Filed: January 11, 2012
    Publication date: July 11, 2013
    Applicant: ANALOG DEVICES, INC.
    Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
  • Patent number: 8455288
    Abstract: A micromachining process forms a plurality of layers on a wafer. This plurality of layers includes both a support layer and a given layer. The process also forms a mask, with a mask hole, at least in part on the support layer. In this configuration, the support layer is positioned between the mask hole and the given layer, and longitudinally spaces the mask hole from the given layer. The process also etches a feature into the given layer through the mask hole.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: June 4, 2013
    Assignee: Analog Devices, Inc.
    Inventors: Kuang L. Yang, Thomas D. Chen
  • Publication number: 20130065343
    Abstract: A micromachining process forms a plurality of layers on a wafer. This plurality of layers includes both a support layer and a given layer. The process also forms a mask, with a mask hole, at least in part on the support layer. In this configuration, the support layer is positioned between the mask hole and the given layer, and longitudinally spaces the mask hole from the given layer. The process also etches a feature into the given layer through the mask hole.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 14, 2013
    Applicant: ANALOG DEVICES, INC.
    Inventors: Kuang L. Yang, Thomas D. Chen
  • Patent number: 8389314
    Abstract: A method of producing a MEMS device provides a MEMS apparatus having released structure. The MEMS apparatus is formed at least in part from an SOI wafer having a first layer, a second layer spaced from the first layer, and an insulator layer between the first layer and second layer. The first layer has a top surface, while the second layer has a bottom surface facing the top surface. After providing the MEMS apparatus, the method increases the roughness of at least the top surface of the first layer or the bottom surface of the second layer.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: March 5, 2013
    Assignee: Analog Devices, Inc.
    Inventors: John R. Martin, Thomas D. Chen, Jinbo Kuang, Thomas Kieran Nunan, Xin Zhang
  • Publication number: 20110075865
    Abstract: A dual backplate MEMS microphone system includes a flexible diaphragm sandwiched between two single-crystal silicon backplates. Such a MEMS microphone system may be formed by fabricating each backplate in a separate wafer, and then transferring one backplate from its wafer to the other wafer, to form two separate capacitors with the diaphragm.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 31, 2011
    Applicant: ANALOG DEVICES, INC.
    Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
  • Publication number: 20080081391
    Abstract: A method of producing a MEMS device provides a MEMS apparatus having released structure. The MEMS apparatus is formed at least in part from an SOI wafer having a first layer, a second layer spaced from the first layer, and an insulator layer between the first layer and second layer. The first layer has a top surface, while the second layer has a bottom surface facing the top surface. After providing the MEMS apparatus, the method increases the roughness of at least the top surface of the first layer or the bottom surface of the second layer.
    Type: Application
    Filed: October 3, 2006
    Publication date: April 3, 2008
    Applicant: ANALOG DEVICES, INC.
    Inventors: John R. Martin, Thomas D. Chen, Jinbo Kuang, Thomas Kieran Nunan, Xin Zhang
  • Publication number: 20040104444
    Abstract: A MEMS device has a first silicon layer, a second silicon layer, and an insulating layer between the first and second silicon layers. The first silicon layer has at least a primary portion and an isolated portion, where the isolated portion has no electrical connection with the primary portion via the first silicon layer. The MEMS device also has a conductive element within the insulating layer. The conductive element is in electrical contact with both the primary portion and the isolated portion.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 3, 2004
    Inventors: Bruce K. Wachtmann, David J. Collins, Thomas D. Chen