Patents Assigned to Alpha & Omega Semiconductor Limited
  • Patent number: 7622796
    Abstract: A semiconductor package is disclosed. The package includes a leadframe having drain, source and gate leads, and a semiconductor die coupled to the leadframe, the semiconductor die having a plurality of metalized source contacts. A bridged source plate interconnection has a bridge portion, valley portions disposed on either side of the bridge portion, plane portions disposed on either side of the valley portions and the bridge portion, and a connection portion depending from one of the plane portions, the bridged source plate interconnection connecting the source lead with the plurality of metalized source contacts. The bridge portion is disposed in a plane above the plane of the valley portions while the plane portions are disposed in a plane intermediate the plane of the bridge portion and the plane of the valley portions.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: November 24, 2009
    Assignee: Alpha and Omega Semiconductor Limited
    Inventors: Lei Shi, Ming Sun, Kai Liu
  • Patent number: 7612439
    Abstract: A composite semiconductor package is disclosed. The package includes a lead frame having first and second die bonding pads, the first and second die bonding pads having a large lateral separation therebetween, a first device bonded to the first die bonding pad, a second device bonded to the second die bonding pad, a plurality of first leads coupled to the first die bonding pad, a plurality of second leads coupled to the second die bonding pad, and an encapsulant covering the lead frame, the first and second devices and at least a portion of the first and second pluralities of leads. The package may be a TSSOP-8 composite package having a common drain MOSFET pair and an IC.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: November 3, 2009
    Assignee: Alpha and Omega Semiconductor Limited
    Inventors: Xiaotian Zhang, Argo Chang, James Lee, Ryan Huang, Kai Liu, Ming Sun
  • Patent number: 7605425
    Abstract: A semiconductor device comprises a drain, a body disposed over the drain, having a body top surface, a source embedded in the body, extending downward from the body top surface into the body, a gate trench extending through the source and the body into the drain, a gate disposed in the gate trench, a source body contact trench having a trench wall and an anti-punch through implant that is disposed along the trench wall.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: October 20, 2009
    Assignee: Alpha & Omega Semiconductor Limited
    Inventors: Anup Bhalla, Sik Lui, Tiesheng Li
  • Patent number: 7485954
    Abstract: A stacked dual MOSFET package is disclosed.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: February 3, 2009
    Assignee: Alpha and Omega Semiconductor Limited
    Inventor: Sanjay Havanur
  • Patent number: 7394151
    Abstract: A semiconductor package and method for making a semiconductor package are disclosed. The semiconductor package has a top surface and a mounting surface and includes a die, a conducting connecting material, a plating material and an insulating material. The die has a processed surface facing towards the mounting surface of the semiconductor package. Exposed metal connections are at the processed surface of the die. The conducting connecting material is disposed on the exposed metal connections. The plating material is in contact with the conducting connecting material. The insulating material is formed around the conducting connecting material, and the plating material extends to the exterior of the insulating material.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: July 1, 2008
    Assignee: Alpha & Omega Semiconductor Limited
    Inventors: Leeshawn Luo, Kai Liu, Ming Sun, Xiao Tian Zhang
  • Patent number: 7391100
    Abstract: A semiconductor integrated circuit package having a leadframe (108) that includes a leadframe pad (103a) disposed under a die (100) and a bonding metal area (101a) that is disposed over at least two adjacent sides of the die. The increase in the bonding metal area (101a) increases the number of interconnections between the metal area (101a) and the die (100) to reduce the electric resistance and inductance. Furthermore, the surface area of the external terminals radiating from the package's plastic body (106) is increased if not maximized so that heat can be dissipated quicker and external terminal resistances reduced. The integrated circuit is applicable for MOSFET devices and the bonding metal area (101a) is used for the source terminal (101). The bonding metal area may have a “L” shape, a “C” shape, a “J” shape, an “I” shape or any combination thereof.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: June 24, 2008
    Assignee: Alpha & Omega Semiconductor Limited
    Inventors: Leeshawn Luo, Anup Bhalla, Yueh-Se Ho, Sik K. Lui, Mike Chang