Patents by Inventor Choong Chee

Choong Chee 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: 9293395
    Abstract: A lead frame for a semiconductor device includes a die paddle and leads situated on a perimeter of the lead frame. The die paddle has a metal frame and a number of substantially linear metal connecting bars within the frame. The connecting bars interconnect different locations of the frame to form a multiple triangles, where a triangular-shaped cavity is formed within each triangle. An overall area of the cavities is greater than an overall area of the connecting bars.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: March 22, 2016
    Assignee: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Wai Keong Wong, Soo Choong Chee, Stanley Job Doraisamy
  • Patent number: 9171786
    Abstract: An integrated circuit (IC) die has an active side and an inactive side, opposite the active side. A recess is formed within the interior of the inactive side and extends partially through the integrated circuit towards the active side. The IC die is part of a packaged IC device, where the die is attached to a package component such as a lead frame, substrate, or another die, using die attach adhesive that fills the recess, thereby providing a more reliable bond between the IC die and the package component.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: October 27, 2015
    Assignee: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Soon Kang Chan, Soo Choong Chee, Stanley Job Doraisamy, Dominic Koey
  • Patent number: 9165869
    Abstract: A lead frame for a semiconductor device has a die flag and leads that surround the die flag. In order to decrease the distance or spacing between inner lead ends and the die flag, which allows for short bond wires for connecting the inner lead ends to a die mounted on the die flag, at least some of the leads are twisted along their lengths to be angled with respect to a die-flag plane. The pitch between such twisted leads can be reduced without resulting in physical contact between adjacent leads, enabling the leads to extend further towards the die flag.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: October 20, 2015
    Assignee: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Soo Choong Chee, Meng Kong Lye, Wai Keong Wong
  • Publication number: 20150270195
    Abstract: A lead frame for a semiconductor device includes a die paddle and leads situated on a perimeter of the lead frame. The die paddle has a metal frame and a number of substantially linear metal connecting bars within the frame. The connecting bars interconnect different locations of the frame to form a multiple triangles, where a triangular-shaped cavity is formed within each triangle. An overall area of the cavities is greater than an overall area of the connecting bars.
    Type: Application
    Filed: March 19, 2014
    Publication date: September 24, 2015
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Wai Keong Wong, Soo Choong Chee, Stanley Job Doraisamy
  • Patent number: 9136399
    Abstract: A semiconductor device package is assembled using a jig that alters the shape of gel material disposed in a cavity in the package. In one embodiment, a jig having a concave bottom surface is inserted onto uncured gel material disposed within a cavity in a housing of the package to change a top surface of the gel from having a concave shape to a convex shape. The gel is then cured with the jig in place. When the jig is subsequently removed, the cured gel retains the convex shape, which helps to avoid any bond wires from being exposed. The re-shaped gel material reduces internal stresses during thermal cycling and can therefore reduce permanent damage to the package otherwise resulting from such thermal cycling.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: September 15, 2015
    Assignee: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Stanley Job Doraisamy, Soon Kang Chan, Soo Choong Chee
  • Publication number: 20150137278
    Abstract: A semiconductor device package is assembled using a jig that alters the shape of gel material disposed in a cavity in the package. In one embodiment, a jig having a concave bottom surface is inserted onto uncured gel material disposed within a cavity in a housing of the package to change a top surface of the gel from having a concave shape to a convex shape. The gel is then cured with the jig in place. When the jig is subsequently removed, the cured gel retains the convex shape, which helps to avoid any bond wires from being exposed. The re-shaped gel material reduces internal stresses during thermal cycling and can therefore reduce permanent damage to the package otherwise resulting from such thermal cycling.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 21, 2015
    Inventors: Stanley Job Doraisamy, Soon Kang Chan, Soo Choong Chee
  • Publication number: 20080017976
    Abstract: A method of packaging a die includes attaching the die to a substrate; underfilling the space between the die and the substrate with a first material, and placing a second material in contact with at least a portion of the die and the substrate after underfilling the space between the die and substrate with the first material. A system includes a semiconductor package having a substrate, a die attached to the substrate, an underfill material positioned between the die and the substrate, and a molding material in contact with at least a portion of the substrate and the die. A heat sink is also in thermal contact with the semiconductor package.
    Type: Application
    Filed: August 8, 2007
    Publication date: January 24, 2008
    Inventors: Yin Lai, Choong Chee, Edward Then, Cheong Ng, Mun Low
  • Publication number: 20070133081
    Abstract: According to embodiments of the present invention, a first layer of electrically conductive material may be disposed in a recess in a micro-electromechanical system (MEMS) base. An electrically charged gel network may be disposed in the recess on the first layer of electrically conductive material. A second layer of electrically conductive material may be disposed in the recess on the cross-linked co-polymer gel network. A functionalizer may be disposed on the first and the second layers of electrically conductive material.
    Type: Application
    Filed: February 6, 2007
    Publication date: June 14, 2007
    Inventor: Choong Chee
  • Publication number: 20060214311
    Abstract: A method of packaging a die includes attaching the die to a substrate; underfilling the space between the die and the substrate with a first material, and placing a second material in contact with at least a portion of the die and the substrate after underfilling the space between the die and substrate with the first material. A system includes a semiconductor package having a substrate, a die attached to the substrate, an underfill material positioned between the die and the substrate, and a molding material in contact with at least a portion of the substrate and the die. A heat sink is also in thermal contact with the semiconductor package.
    Type: Application
    Filed: September 30, 2003
    Publication date: September 28, 2006
    Inventors: Yin Lai, Choong Chee, Edward Then, Cheong Ng, Mun Low
  • Publication number: 20050264903
    Abstract: According to embodiments of the present invention, a first layer of electrically conductive material may be disposed in a recess in a micro-electromechanical system (MEMS) base. An electrically charged gel network may be disposed in the recess on the first layer of electrically conductive material. A second layer of electrically conductive material may be disposed in the recess on the cross-linked co-polymer gel network. A functionalizer may be disposed on the first and the second layers of electrically conductive material.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 1, 2005
    Inventor: Choong Chee
  • Publication number: 20050221532
    Abstract: A stress-compensation layer is formed by pressing a solder bump into a compressible film within a mold chase. The stress-compensation layer flows against the solder bump and the compressible film such that at least a portion of the solder ball is embedded in the stress-compensation layer. The compressible film is removed to reveal at least a portion of the solder bump exposed and free of the stress-compensation layer. An article that exhibits a stress-compensation layer with a surface characteristic of the imposed flexible film is also included. A computing system that includes a stress-compensation layer with a surface characteristic of the imposed flexible film is also included.
    Type: Application
    Filed: March 31, 2004
    Publication date: October 6, 2005
    Inventor: Choong Chee
  • Publication number: 20050133938
    Abstract: A system for chip packaging includes an adamantoid packaging composition. The adamantoid composition ameliorates the CTE mismatch that typically exists between a packaged die and a resin-impregnated fiberglass mounting substrate. In an embodiment, the system includes a packaging composition that alone exhibits a CTE that is characteristic of an inorganic-filled underfill composite previously known. An embodiment is also directed to the assembly of a chip package that uses an adamantoid packaging composition.
    Type: Application
    Filed: December 18, 2003
    Publication date: June 23, 2005
    Inventors: Sheau Lim, Choong Chee