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: 9338559Abstract: 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: GrantFiled: April 16, 2013Date of Patent: May 10, 2016Assignee: INVENSENSE, INC.Inventors: Jicheng Yang, Lee J. Jacobson, Sushil Bharatan, Thomas D. Chen
-
Patent number: 9219963Abstract: 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: GrantFiled: November 20, 2013Date of Patent: December 22, 2015Assignee: INVENSENSE, INC.Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
-
Publication number: 20150264465Abstract: 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: ApplicationFiled: May 29, 2015Publication date: September 17, 2015Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
-
Patent number: 9078069Abstract: 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: GrantFiled: January 11, 2012Date of Patent: July 7, 2015Assignee: INVENSENSE, INC.Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
-
Publication number: 20140307909Abstract: 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: ApplicationFiled: April 16, 2013Publication date: October 16, 2014Applicant: Invensense, Inc.Inventors: Jicheng Yang, Lee J. Jacobson, Sushil Bharatan, Thomas D. Chen
-
Publication number: 20140072152Abstract: 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: ApplicationFiled: November 20, 2013Publication date: March 13, 2014Applicant: Invensense, Inc.Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
-
Patent number: 8590136Abstract: 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: GrantFiled: August 27, 2010Date of Patent: November 26, 2013Assignee: Analog Devices, Inc.Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
-
Publication number: 20130177180Abstract: 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: ApplicationFiled: January 11, 2012Publication date: July 11, 2013Applicant: ANALOG DEVICES, INC.Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
-
Patent number: 8455288Abstract: 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: GrantFiled: September 14, 2011Date of Patent: June 4, 2013Assignee: Analog Devices, Inc.Inventors: Kuang L. Yang, Thomas D. Chen
-
Publication number: 20130065343Abstract: 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: ApplicationFiled: September 14, 2011Publication date: March 14, 2013Applicant: ANALOG DEVICES, INC.Inventors: Kuang L. Yang, Thomas D. Chen
-
Patent number: 8389314Abstract: 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: GrantFiled: October 3, 2006Date of Patent: March 5, 2013Assignee: Analog Devices, Inc.Inventors: John R. Martin, Thomas D. Chen, Jinbo Kuang, Thomas Kieran Nunan, Xin Zhang
-
Publication number: 20110075865Abstract: 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: ApplicationFiled: August 27, 2010Publication date: March 31, 2011Applicant: ANALOG DEVICES, INC.Inventors: Kuang L. Yang, Li Chen, Thomas D. Chen
-
Publication number: 20080081391Abstract: 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: ApplicationFiled: October 3, 2006Publication date: April 3, 2008Applicant: ANALOG DEVICES, INC.Inventors: John R. Martin, Thomas D. Chen, Jinbo Kuang, Thomas Kieran Nunan, Xin Zhang
-
Publication number: 20040104444Abstract: 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: ApplicationFiled: December 3, 2002Publication date: June 3, 2004Inventors: Bruce K. Wachtmann, David J. Collins, Thomas D. Chen