Patents by Inventor Weilong Tang

Weilong Tang 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: 10373830
    Abstract: An electromagnetic wave irradiation apparatus and methods to bond unbonded areas in a bonded pair of substrates are disclosed. The unbonded areas between the substrates are eliminated by thermal activation in the unbonded areas induced by electromagnetic wave irradiation having a wavelength selected to effect a phonon or electron excitation. A first substrate of the bonded pair of substrates absorbs the electromagnetic radiation and a portion of a resulting thermal energy transfers to an interface of the bonded pair of substrates at the unbonded areas with sufficient flux to cause opposite sides the first and second substrates to interact and dehydrate to form a bond (e.g., Si—O—Si bond).
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: August 6, 2019
    Assignee: Ostendo Technologies, Inc.
    Inventors: Hussein S. El-Ghoroury, Minghsuan Liu, Kameshwar Yadavalli, Weilong Tang, Benjamin A. Haskell, Hailong Zhou
  • Publication number: 20170263457
    Abstract: An electromagnetic wave irradiation apparatus and methods to bond unbonded areas in a bonded pair of substrates are disclosed. The unbonded areas between the substrates are eliminated by thermal activation in the unbonded areas induced by electromagnetic wave irradiation having a wavelength selected to effect a phonon or electron excitation. A first substrate of the bonded pair of substrates absorbs the electromagnetic radiation and a portion of a resulting thermal energy transfers to an interface of the bonded pair of substrates at the unbonded areas with sufficient flux to cause opposite sides the first and second substrates to interact and dehydrate to form a bond (e.g., Si—O—Si bond).
    Type: Application
    Filed: March 7, 2017
    Publication date: September 14, 2017
    Inventors: Hussein S. El-Ghoroury, Minghsuan Liu, Kameshwar Yadavalli, Weilong Tang, Benjamin A. Haskell, Hailong Zhou
  • Patent number: 7922888
    Abstract: The present invention relates to A microfabricated tip and post structure comprising a post having a rough top surface that diffuses incident light and a cross-section, and a tip, lithographically plated on the rough top surface of the post, having a smooth reflective surface appropriate for automatic vision recognition, and having a cross-section that is less than the cross-section of the post.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: April 12, 2011
    Assignee: Touchdown Technologies, Inc.
    Inventors: Salleh Ismail, Nim Tea, Yang Hsu, Weilong Tang, Raffi Garabedian, Melvin Khoo
  • Publication number: 20100299375
    Abstract: A method in the field of printing for merging Portable Document Format documents which increases the merging efficiency of said documents. The method comprises: performing upon all priorities, according to a high-to-low priority sequence based on pre-determined priorities for key word type combination, the following processes until all merging pages and merged pages of the documents to be merged are completely determined: acquiring the key word combination corresponding to the key word type combination in the current priority; executing the following process according to each key word combination that is acquired, until all merging pages and merged pages of the documents to be merged are determined, or until processing of all acquired key word combinations is complete. In the remaining documents to file names include documents to be merged under the current key word combination.
    Type: Application
    Filed: October 24, 2008
    Publication date: November 25, 2010
    Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., BEIJING FOUNDER ELECTRONICS CO., LTD.
    Inventors: Weilong Tang, Zhendong Zhou
  • Patent number: 7724010
    Abstract: The present invention relates to a probe for making electrical connection to a contact pad on a microelectronic device. A foot having a length, a thickness, a width, a proximal end, and a distal end, is connected to a substrate. The length of the foot is greater than its width. A torsion bar having a length, a width, a thickness, a proximal end, and a distal end, is connected to the distal end of the foot at the proximal end of torsion bar. The torsion bar lies in a first plane. A spacer having a length, a width, and a thickness, is connected to the distal end of the torsion bar. An arm having a length, a width, a thickness, a proximal end, and a distal end is connected to said spacer at the arms proximal end. The arm lies in a second plane and the second plane is in a different plane than the first plane. A first post having a top side and a bottom side is connected to the arm near the distal end of the arm. A tip is electrically connected to the top side of the post.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: May 25, 2010
    Assignee: Touchdown Technologies, Inc.
    Inventors: Melvin Khoo, Nim Tea, Salleh Ismail, Yang Hsu, Weilong Tang, Raffi Garabedian
  • Publication number: 20080106289
    Abstract: The present invention relates to a probe for making electrical connection to a contact pad on a microelectronic device. A foot having a length, a thickness, a width, a proximal end, and a distal end, is connected to a substrate. The length of the foot is greater than its width. A torsion bar having a length, a width, a thickness, a proximal end, and a distal end, is connected to the distal end of the foot at the proximal end of torsion bar. The torsion bar lies in a first plane. A spacer having a length, a width, and a thickness, is connected to the distal end of the torsion bar. An arm having a length, a width, a thickness, a proximal end, and a distal end is connected to said spacer at the arms proximal end. The arm lies in a second plane and the second plane is in a different plane than the first plane. A first post having a top side and a bottom side is connected to the arm near the distal end of the arm. A tip is electrically connected to the top side of the post.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 8, 2008
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Melvin Khoo, Nim Tea, Salleh Ismail, Yang Hsu, Weilong Tang, Raffi Garabedian
  • Patent number: 7362119
    Abstract: The present invention relates to a probe for making electrical connection to a contact pad on a microelectronic device. A foot having a length, a thickness, a width, a proximal end, and a distal end, is connected to a substrate. The length of the foot is greater than its width. A torsion bar having a length, a width, a thickness, a proximal end, and a distal end, is connected to the distal end of the foot at the proximal end of torsion bar. The torsion bar lies in a first plane. A spacer having a length, a width, and a thickness, is connected to the distal end of the torsion bar. An arm having a length, a width, a thickness, a proximal end, and a distal end is connected to said spacer at the arms proximal end. The arm lies in a second plane and the second plane is in a different plane than the first plane. A first post having a top side and a bottom side is connected to the arm near the distal end of the arm. A tip is electrically connected to the top side of the post.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: April 22, 2008
    Assignee: Touchdown Technologies, Inc
    Inventors: Melvin Khoo, Nim Tea, Salleh Ismail, Yang Hsu, Weilong Tang, Raffi Garabedian
  • Publication number: 20070240306
    Abstract: The present invention relates to A microfabricated tip and post structure comprising a post having a rough top surface that diffuses incident light and a cross-section, and a tip, lithographically plated on the rough top surface of the post, having a smooth reflective surface appropriate for automatic vision recognition, and having a cross-section that is less than the cross-section of the post.
    Type: Application
    Filed: April 27, 2007
    Publication date: October 18, 2007
    Inventors: Salleh Ismail, Nim Tea, Yang Hsu, Weilong Tang, Raffi Garabedian, Melvin Khoo
  • Patent number: 7271022
    Abstract: The present invention relates to a process for forming microstructures on a substrate. A plating surface is applied to a substrate. A first layer of photoresist is applied on top of the plating base. The first layer of photoresist is exposed to radiation in a pattern to render the first layer of photoresist dissolvable in a first pattern. The dissolvable photoresist is removed and a first layer of primary metal is electroplated in the area where the first layer of photoresist was removed. The remainder of the photoresist is then removed and a second layer of photoresist is then applied over the plating base and first layer of primary metal. The second layer of photoresist is then exposed to a second pattern of radiation to render the photoresist dissolvable and the dissolvable photoresist is removed. The second pattern is an area that surrounds the primary structure, but it does not entail the entire substrate. Rather it is an island surrounding the primary metal.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: September 18, 2007
    Assignee: Touchdown Technologies, Inc.
    Inventors: Weilong Tang, Tseng-Yang Hsu, Salleh Ismail, Nim Hak Tea, Melvin B Khoo, Raffi Garabedian, Lakshimikanth Namburi
  • Patent number: 7264984
    Abstract: The present invention relates to a process for forming microstructures on a substrate. A plating surface is applied to a substrate. A first layer of photoresist is applied on top of the plating base. The first layer of photoresist is exposed to radiation in a pattern to render the first layer of photoresist dissolvable in a first pattern. The dissolvable photoresist is removed and a first layer of primary metal is electroplated in the area where the first layer of photoresist was removed. The remainder of the photoresist is then removed and a second layer of photoresist is then applied over the plating base and first layer of primary metal. The second layer of photoresist is then exposed to a second pattern of radiation to render the photoresist dissolvable and the dissolvable photoresist is removed. The second pattern is an area that surrounds the primary structure, but it does not entail the entire substrate. Rather it is an island surrounding the primary metal.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: September 4, 2007
    Assignee: Touchdown Technologies, Inc.
    Inventors: Raffi Garabedian, Salleh Ismail, Nim Hak Tea, Tseng-Yang Hsu, Melvin B Khoo, Weilong Tang
  • Patent number: 7245135
    Abstract: The present invention relates to A microfabricated tip and post structure comprising a post having a rough top surface that diffuses incident light and a cross-section, and a tip, lithographically plated on the rough top surface of the post, having a smooth reflective surface appropriate for automatic vision recognition, and having a cross-section that is less than the cross-section of the post.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: July 17, 2007
    Assignee: Touchdown Technologies, Inc.
    Inventors: Salleh Ismail, Nim Tea, Yang Hsu, Weilong Tang, Raffi Garabedian, Melvin Khoo
  • Publication number: 20070024297
    Abstract: The present invention relates to A microfabricated tip and post structure comprising a post having a rough top surface that diffuses incident light and a cross-section, and a tip, lithographically plated on the rough top surface of the post, having a smooth reflective surface appropriate for automatic vision recognition, and having a cross-section that is less than the cross-section of the post.
    Type: Application
    Filed: August 1, 2005
    Publication date: February 1, 2007
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Salleh Ismail, Nim Tea, Yang Hsu, Weilong Tang, Raffi Garabedian, Melvin Khoo
  • Publication number: 20070024298
    Abstract: The present invention relates to a probe for making electrical connection to a contact pad on a microelectronic device. A foot having a length, a thickness, a width, a proximal end, and a distal end, is connected to a substrate. The length of the foot is greater than its width. A torsion bar having a length, a width, a thickness, a proximal end, and a distal end, is connected to the distal end of the foot at the proximal end of torsion bar. The torsion bar lies in a first plane. A spacer having a length, a width, and a thickness, is connected to the distal end of the torsion bar. An arm having a length, a width, a thickness, a proximal end, and a distal end is connected to said spacer at the arms proximal end. The arm lies in a second plane and the second plane is in a different plane than the first plane. A first post having a top side and a bottom side is connected to the arm near the distal end of the arm. A tip is electrically connected to the top side of the post.
    Type: Application
    Filed: August 1, 2005
    Publication date: February 1, 2007
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Melvin Khoo, Nim Tea, Salleh Ismail, Yang Hsu, Weilong Tang, Raffi Garabedian
  • Publication number: 20060134819
    Abstract: The present invention relates to a process for forming microstructures on a substrate. A plating surface is applied to a substrate. A first layer of photoresist is applied on top of the plating base. The first layer of photoresist is exposed to radiation in a pattern to render the first layer of photoresist dissolvable in a first pattern. The dissolvable photoresist is removed and a first layer of primary metal is electroplated in the area where the first layer of photoresist was removed. The remainder of the photoresist is then removed and a second layer of photoresist is then applied over the plating base and first layer of primary metal. The second layer of photoresist is then exposed to a second pattern of radiation to render the photoresist dissolvable and the dissolvable photoresist is removed. The second pattern is an area that surrounds the primary structure, but it does not entail the entire substrate. Rather it is an island surrounding the primary metal.
    Type: Application
    Filed: December 21, 2004
    Publication date: June 22, 2006
    Applicant: Integrated Micromachines, Inc.
    Inventors: Weilong Tang, Tseng-Yang Hsu, Salleh Ismail, Nim Tea, Melvin Khoo, Raffi Garabedian
  • Publication number: 20060134820
    Abstract: The present invention relates to a process for forming microstructures on a substrate. A plating surface is applied to a substrate. A first layer of photoresist is applied on top of the plating base. The first layer of photoresist is exposed to radiation in a pattern to render the first layer of photoresist dissolvable in a first pattern. The dissolvable photoresist is removed and a first layer of primary metal is electroplated in the area where the first layer of photoresist was removed. The remainder of the photoresist is then removed and a second layer of photoresist is then applied over the plating base and first layer of primary metal. The second layer of photoresist is then exposed to a second pattern of radiation to render the photoresist dissolvable and the dissolvable photoresist is removed. The second pattern is an area that surrounds the primary structure, but it does not entail the entire substrate. Rather it is an island surrounding the primary metal.
    Type: Application
    Filed: April 11, 2005
    Publication date: June 22, 2006
    Inventors: Weilong Tang, Tseng-Yang Hsu, Salleh Ismail, Nim Tea, Melvin Khoo, Raffi Garabedian, Lakshmikanth Namburi
  • Patent number: 6700174
    Abstract: A pressure sensor having a flexible membrane which is moved by an external force, such as pressure from an air flow. The flexible membrane extends over a semiconductor frame having an opening, such that a portion of the flexible membrane extends over the semiconductor frame, and a portion of the flexible membrane extends over the opening. An inherent tensile stress is present in the membrane. One or more strain gage resistors are formed on the portion of the membrane which extends over the opening of the semiconductor frame. The membrane deforms in response to an externally applied pressure. As the membrane deforms, the strain gage resistors elongate, thereby increasing the resistances of these resistors. This change in resistance is measured and used to determine the magnitude of the external pressure. In one embodiment, a Wheatstone bridge circuit is used to translate the change in resistance of the strain gage resistors into a differential voltage.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: March 2, 2004
    Assignee: Integrated Micromachines, Inc.
    Inventors: Denny K. Miu, Weilong Tang
  • Patent number: 6556737
    Abstract: A fiber-optic microswitch is disclosed that includes a flexible mirror positioning structure including an outer fixed frame, a movable platform upon which a mirror is formed, and two or more resilient support members (e.g., monocrystalline silicon springs or torsion beams) connecting the movable platform to the fixed frame. Stationary fibers are mounted over the mirror. An electromagnetic drive mechanism is provided for positioning the movable platform relative to the fixed frame. The electromagnetic drive mechanism includes one or more coils formed on a drive substrate mounted under the monocrystalline structure, and one or more pole pieces that are mounted on the movable platform. Currents are selectively applied to the coils to generate attractive electromagnetic forces that pull the pole pieces, thereby causing the movable platform to move (e.g., tilt) relative to the fixed frame, thereby selectively directing light from one fiber to another. Various monocrystalline structures are disclosed.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: April 29, 2003
    Assignee: Integrated Micromachines, Inc.
    Inventors: Denny K. Miu, Weilong Tang, Viktoria Temesvary, Brent E. Burns
  • Patent number: 6262463
    Abstract: A micro-sensor having have a flexible monocrystalline structure that is moved by an external force. In one embodiment, one or more pole tips are mounted on the monocrystalline structure. The monocrystalline structure is suspended over one or more planar coils such that each pole tip is suspended over a corresponding planar coil. As the monocrystalline structure moves in response to the external force, the pole tips are moved in the coils, thereby changing the inductance or inducing a voltage in the coils. In another variation, a micro-switch includes a lower structural member having a pattern of raised spacer pads that laterally surround a plurality of contact pads. The lower structural member is joined to an upper structural member that includes a frame, a platform located in the frame and a plurality of spring elements which connect the frame to the platform. The upper structural member has a conductive layer formed on its planar lower surface.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: July 17, 2001
    Assignee: Integrated Micromachines, Inc.
    Inventors: Denny K. Miu, Weilong Tang
  • Patent number: 5821596
    Abstract: A micro-switch having a flexible conductive membrane which is moved by an external force, such as pressure from an air flow, to establish a connection between contact pads. The conductive membrane is stretched over one or more spacer pads to introduce deformation in the conductive membrane, thereby improving the accuracy and repeatability of the micro-switch. The spacing between the contact pads and the conductive membrane is precisely controlled by controlling the height difference between the spacer pads and the conductive pads. This height difference is determined by one or more precisely controlled etch operations.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: October 13, 1998
    Assignee: Integrated Micromachines, Inc.
    Inventors: Denny K. Miu, James R. W. Clymer, Paul A. Endter, Viktoria A. Temesvary, Tseng-Yang Hsu, Weilong Tang
  • Patent number: 5778513
    Abstract: A micro-relay has a flexible monocrystalline structure which is moved by an electromagnetic force to establish a connection between relay contact elements. The micro-relay includes a substrate having a magnetic pathway and one or more coils located over the magnetic pathway. A first contact pad is coupled to the substrate. The monocrystalline structure is suspended over the substrate. A second contact pad and pole pieces are coupled to the monocrystalline structure such that the second contact pad is positioned over the first contact pad, and the pole pieces are located over the coils. A current is applied to the coils to generate an electromagnetic force which flexes the monocrystalline structure toward the substrate, thereby causing the second contact pad to touch the first contact pad. In one embodiment, the coils include insulating spacers located adjacent to the innermost and outermost traces to prevent shorting.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: July 14, 1998
    Assignee: Denny K. Miu
    Inventors: Denny K. Miu, Weilong Tang, Viktoria A. Temesvary