Patents by Inventor Luu T. Nguyen

Luu T. Nguyen 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: 8716830
    Abstract: In one aspect of the present invention, an integrated circuit package will be described. The integrated circuit package includes at least two integrated circuits that are attached with a substrate. The integrated circuits and the substrates are at least partially encapsulated in a molding material. There is a groove or air gap that extends partially through the molding material and that is arranged to form a thermal barrier between the integrated circuits.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: May 6, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Anindya Poddar, Luu T. Nguyen
  • Publication number: 20130127008
    Abstract: In one aspect of the present invention, an integrated circuit package will be described. The integrated circuit package includes at least two integrated circuits that are attached with a substrate. The integrated circuits and the substrates are at least partially encapsulated in a molding material. There is a groove or air gap that extends partially through the molding material and that is arranged to form a thermal barrier between the integrated circuits.
    Type: Application
    Filed: November 23, 2011
    Publication date: May 23, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anindya Poddar, Luu T. Nguyen
  • Publication number: 20120032354
    Abstract: Methods and systems are described for enabling the efficient fabrication of wedge bonding of integrated circuit systems and electronic systems. In particular a reverse bonding approach can be employed.
    Type: Application
    Filed: June 29, 2011
    Publication date: February 9, 2012
    Applicant: National Semiconductor Corporation
    Inventors: Ken Pham, Luu T. Nguyen
  • Patent number: 7824963
    Abstract: Apparatuses and methods for inkjet printing electrical interconnect patterns such as leadframes for integrated circuit devices are disclosed. An apparatus for packaging includes a thin substrate adapted for high temperature processing, and an attach pad and contact regions that are inkjet printed to the thin substrate using a metallic nanoink. The nanoink is then cured to remove liquid content. The residual metallic leadframe or electrical interconnect pattern has a substantially consistent thickness of about 10 to 50 microns or less. An associated panel assembly includes a conductive substrate panel having multiple separate device arrays comprising numerous electrical interconnect patterns each, a plurality of integrated circuit devices mounted on the conductive substrate panel, and a molded cap that encapsulates the integrated circuit devices and associated electrical interconnect patterns.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: November 2, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Randall L. Walberg, Luu T. Nguyen, Anindya Poddar
  • Patent number: 7808089
    Abstract: One aspect of the invention pertains to a semiconductor package having a die and a die attach pad with a plurality of spaced apart pedestals supported by a web. A die is mounted on the die attach pad such that the die is supported by at least a plurality of the pedestals. Selected edge regions of the die are arranged to overlie recessed regions of the die attach pad between adjacent pedestals. The die is electrically connected to at least some of the contact leads. An adhesive is arranged to secure the die to the die attach pad, with the thickness of the adhesive between the web of the die attach pad and the die being greater than the thickness of the adhesive between the die and the top surfaces of the pedestals that support the die. The die attach pad may have rounded peripheral corners between adjacent edge surfaces of the die attach pad.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: October 5, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Luu T. Nguyen, Vijaylaxmi Gumaste
  • Patent number: 7728399
    Abstract: Apparatuses and methods directed to an integrated circuit package having an optical component are disclosed. The package may include an integrated circuit die having at least one light sensitive region disposed on a first surface thereof. By way of example, the die may be a laser diode that emits light through the light sensitive region, or a photodetector that receives and detects light through the light sensitive region. An optical concentrator may be positioned adjacent the first surface of the first die. The optical concentrator includes a lens portion positioned adjacent the light sensitive region and adapted to focus light.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: June 1, 2010
    Assignees: National Semiconductor Corporation, The Regents of the University of California
    Inventors: Randall L. Walberg, Luu T. Nguyen, Robert Dahlgren, James B. Wieser, Kenneth Pedrotti, Jacob A. Wysocki
  • Publication number: 20100072613
    Abstract: Apparatuses and methods for inkjet printing electrical interconnect patterns such as leadframes for integrated circuit devices are disclosed. An apparatus for packaging includes a thin substrate adapted for high temperature processing, and an attach pad and contact regions that are inkjet printed to the thin substrate using a metallic nanoink. The nanoink is then cured to remove liquid content. The residual metallic leadframe or electrical interconnect pattern has a substantially consistent thickness of about 10 to 50 microns or less. An associated panel assembly includes a conductive substrate panel having multiple separate device arrays comprising numerous electrical interconnect patterns each, a plurality of integrated circuit devices mounted on the conductive substrate panel, and a molded cap that encapsulates the integrated circuit devices and associated electrical interconnect patterns.
    Type: Application
    Filed: November 25, 2009
    Publication date: March 25, 2010
    Applicant: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Randall L. Walberg, Luu T. Nguyen, Anindya Poddar
  • Patent number: 7667304
    Abstract: Apparatuses and methods for inkjet printing electrical interconnect patterns such as leadframes for integrated circuit devices are disclosed. An apparatus for packaging includes a thin substrate adapted for high temperature processing, and an attach pad and contact regions that are inkjet printed to the thin substrate using a metallic nanoink. The nanoink is then cured to remove liquid content. The residual metallic leadframe or electrical interconnect pattern has a substantially consistent thickness of about 10 to 50 microns or less. An associated panel assembly includes a conductive substrate panel having multiple separate device arrays comprising numerous electrical interconnect patterns each, a plurality of integrated circuit devices mounted on the conductive substrate panel, and a molded cap that encapsulates the integrated circuit devices and associated electrical interconnect patterns.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: February 23, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Randall L. Walberg, Luu T. Nguyen, Anindya Poddar
  • Publication number: 20100019339
    Abstract: Apparatuses and methods directed to an integrated circuit package having an optical component are disclosed. The package may include an integrated circuit die having at least one light sensitive region disposed on a first surface thereof. By way of example, the die may be a laser diode that emits light through the light sensitive region, or a photodetector that receives and detects light through the light sensitive region. An optical concentrator may be positioned adjacent the first surface of the first die. The optical concentrator includes a lens portion positioned adjacent the light sensitive region and adapted to focus light.
    Type: Application
    Filed: July 22, 2008
    Publication date: January 28, 2010
    Applicants: NATIONAL SEMICONDUCTOR CORPORATION, THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Randall L. WALBERG, Luu T. NGUYEN, Robert DAHLGREN, James B. WIESER, Kenneth PEDROTTI, Jacob A. WYSOCKI
  • Publication number: 20100015329
    Abstract: Methods and arrangements are described for forming an array of contacts for use in packaging one or more integrated circuit devices. In particular, various methods are described for forming contacts having thicknesses less than approximately 10 ?m, and in particular embodiments, between 0.5 to 2 ?m.
    Type: Application
    Filed: July 16, 2008
    Publication date: January 21, 2010
    Applicant: National Semiconductor Corporation
    Inventors: Luu T. NGUYEN, Anindya PODDAR, Shaw W. LEE, Ashok S. PRABHU
  • Publication number: 20090267216
    Abstract: Apparatuses and methods for inkjet printing electrical interconnect patterns such as leadframes for integrated circuit devices are disclosed. An apparatus for packaging includes a thin substrate adapted for high temperature processing, and an attach pad and contact regions that are inkjet printed to the thin substrate using a metallic nanoink. The nanoink is then cured to remove liquid content. The residual metallic leadframe or electrical interconnect pattern has a substantially consistent thickness of about 10 to 50 microns or less. An associated panel assembly includes a conductive substrate panel having multiple separate device arrays comprising numerous electrical interconnect patterns each, a plurality of integrated circuit devices mounted on the conductive substrate panel, and a molded cap that encapsulates the integrated circuit devices and associated electrical interconnect patterns.
    Type: Application
    Filed: April 28, 2008
    Publication date: October 29, 2009
    Applicant: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Randall L. Walberg, Luu T. Nguyen, Anindya Poddar
  • Publication number: 20090174069
    Abstract: A semiconductor device is described. The device includes an integrated circuit die having an active surface that includes a plurality of input/output (I/O) pads. The device further includes a plurality of crack resistant structures. Each crack resistant structure is formed over an associated I/O pad and includes an associated raised portion. Each I/O pad may be bumped with solder such that a solder bump is formed over the associated crack resistant structure on the I/O pad.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 9, 2009
    Applicant: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Hau Nguyen, Luu T. Nguyen, Anindya Poddar
  • Publication number: 20090152683
    Abstract: One aspect of the invention pertains to a semiconductor die with rounded sidewall junction edge corners. Such rounding reduces stress accumulations at those corners. In other embodiments of the invention, the sharpness of other corners and edges in the die are reduced. For example, reducing the sharpness of the bottom edge corners formed by the intersection of a sidewall and the back surface of a die can further diminish stress accumulations. One embodiment pertains to a wafer carried on a wafer support, where the wafer includes a multiplicity of such dice. Another embodiment involves a semiconductor package containing such dice. Methods of fabricating the dice are also described.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 18, 2009
    Applicant: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Luu T. Nguyen, Vijaylaxmi Gumaste
  • Publication number: 20090152691
    Abstract: One aspect of the invention pertains to a semiconductor package having a die and a die attach pad with a plurality of spaced apart pedestals supported by a web. A die is mounted on the die attach pad such that the die is supported by at least a plurality of the pedestals. Selected edge regions of the die are arranged to overlie recessed regions of the die attach pad between adjacent pedestals. The die is electrically connected to at least some of the contact leads. An adhesive is arranged to secure the die to the die attach pad, with the thickness of the adhesive between the web of the die attach pad and the die being greater than the thickness of the adhesive between the die and the top surfaces of the pedestals that support the die. The die attach pad may have rounded peripheral corners between adjacent edge surfaces of the die attach pad.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 18, 2009
    Applicant: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Luu T. NGUYEN, Vijaylaxmi GUMASTE
  • Patent number: 7253078
    Abstract: An apparatus and method for forming a layer of underfill adhesive on an integrated circuit in wafer form is described. In one embodiment, the layer of underfill adhesive is disposed and partially cured on the active surface of the wafer. Once the underfill adhesive has partially cured, the wafer is singulated. The individual integrated circuits or die are then mounted onto a substrate such as a printed circuit board. When the solder balls of the integrated circuit are reflowed to form joints with corresponding contact pads on the substrate, the underfill adhesive reflows and is completely cured. In an alternative embodiment, the underfill adhesive is fully cured after it is disposed onto the active surface of the wafer.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: August 7, 2007
    Assignee: National Semiconductor Corporation
    Inventors: Luu T. Nguyen, Hau T. Nguyen, Viraj A. Patwardhan, Nikhil Kelkar, Shahram Mostafazadeh
  • Patent number: 6830382
    Abstract: An embodiment includes a connector element that comprises a connector body and a fiber optic ferrule slidably positioned inside the connector body. The ferrule holds at least one optical fiber. The connector element carries an optical sub-assembly including a photonic device and a spacer and includes a connector sleeve for receiving the connector element. The sleeve includes a ridge that operates as a first stop for the connector body and includes an alignment projection that coarsely aligns the fiber optic ferrule. The ferrule includes a pair of openings configured to receive a pair of alignment pins to provide fine alignment of optical fibers with corresponding photonic devices. The connector element is engaged with the connector sleeve to position the ferrule with respect to the optical sub-assembly such that the optical fiber is correctly positioned relative to a corresponding photonic device.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: December 14, 2004
    Assignee: National Semiconductor Corporation
    Inventors: Peter Deane, Luu T. Nguyen, William P. Mazotti, Bruce C. Roberts, Christopher J. Smith, Janet E. Townsend, John P. Briant, Michael R. Nelson, Stephen Jacob
  • Patent number: 6822315
    Abstract: An apparatus and method for scribing a semiconductor wafer coated with a substantially opaque material using vision recognition is disclosed. The apparatus includes a stage configured to hold a wafer, an imaging unit configured to generate an image of the wafer, and a computer configured to identify the coordinates of the scribe lines on the wafer from the image. During operation, the wafer is imaged using the imaging unit. The computer then identifies the coordinates of the scribe lines on the wafer from the image. Thereafter the coordinates are provided to a dicing machine which performs the dicing of the wafer. Accuracy is therefore improved since the dicing machine relies on the coordinates of the scribe lines as opposed to attempting to recognize the scribe lines through the opaque material. According to various embodiments of the invention, the imaging unit may use infrared, X-ray or ultrasound waves to generate the image of the wafer.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: November 23, 2004
    Assignee: National Semiconductor Corporation
    Inventors: Nikhil V. Kelkar, Luu T. Nguyen
  • Patent number: 6802654
    Abstract: The invention comprises a connector apparatus for electrically interconnecting a chip sub-assembly to an optical sub-assembly. The apparatus includes a connector sleeve with a chip sub-assembly having at least one electrical connection arranged thereon. The connector sleeve is suitable for receiving a connector plug that includes an optical fiber optically coupled to the photonic devices of an optical sub-assembly that includes electrical connectors. The connector plug is engaged with the connector sleeve, thereby electrically interconnecting the electrical connections of the chip sub-assembly to the electrical connectors of the optical sub-assembly such that electrical signals can pass between the chip sub-assembly and a photonic device of the optical sub-assembly.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: October 12, 2004
    Assignee: National Semiconductor Corporation
    Inventors: Bruce C. Roberts, Stephen A. Gee, William P. Mazotti, Luu T. Nguyen, Jia Liu, Peter Deane, Ken Pham
  • Publication number: 20030153179
    Abstract: An apparatus and method for scribing a semiconductor wafer coated with a substantially opaque material using vision recognition is disclosed. The apparatus includes a stage configured to hold a wafer, an imaging unit configured to generate an image of the wafer, and a computer configured to identify the coordinates of the scribe lines on the wafer from the image. During operation, the wafer is imaged using the imaging unit. The computer then identifies the coordinates of the scribe lines on the wafer from the image. Thereafter the coordinates are provided to a dicing machine which performs the dicing of the wafer. Accuracy is therefore improved since the dicing machine relies on the coordinates of the scribe lines as opposed to attempting to recognize the scribe lines through the opaque material. According to various embodiments of the invention, the imaging unit may use infrared, X-ray or ultrasound waves to generate the image of the wafer.
    Type: Application
    Filed: February 14, 2002
    Publication date: August 14, 2003
    Applicant: National Semiconductor Corporation
    Inventors: Nikhil V. Kelkar, Luu T. Nguyen
  • Patent number: 5437095
    Abstract: A method of making an integrated circuit package is disclosed herein along with the package itself, which package is encapsulated by plastic that is caused to flow in a given direction during the package's formation. The package itself includes an IC chip having an army of chip output/input terminals, and means for supporting the chip including an array of electrically conductive leads, all of which are provided for connection with the output/input terminals of the IC chip. In addition, the overall package includes bonding wires connecting the chip output/input terminals with respective ones of the leads such that each bonding wire extends in a direction that defines an acute angle of less than 45 degrees with the given flow direction of the plastic material used to encapsulate the IC chip, support means and bonding wires. In a preferred embodiment, at least a portion and most preferably substantially all of the bonding wires are substantially parallel with the given flow direction of the plastic material.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: August 1, 1995
    Assignee: National Semiconductor Corporation
    Inventors: Luu T. Nguyen, Hem P. Takiar