Patents by Inventor Yueh-Se Ho

Yueh-Se Ho 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).

  • Publication number: 20120032259
    Abstract: A bottom source power metal-oxide-semiconductor field-effect transistor (MOSFET) device includes a gate electrode and a source electrode formed on an initial insulation layer on a first surface of a semiconductor chip and a drain electrode formed on a second surface of the semiconductor chip. The source electrode includes a source metal, a source electrode bump formed on the source metal and a source electrode metal layer on top of the source electrode bump. A first insulation layer covers the gate electrode. A through via aligned to the gate electrode is formed from the second surface of the chip to expose a portion of the gate electrode from the second surface.
    Type: Application
    Filed: October 13, 2011
    Publication date: February 9, 2012
    Inventors: Yueh-Se Ho, Yan Xun Xue, Ping Huang
  • Publication number: 20120025298
    Abstract: A semiconductor device, a method of manufacturing semiconductor devices and a circuit package assembly are described. A semiconductor device can have a semiconductor substrate with first and second surfaces and a sidewall between them. First and second conductive pads on the first and second surfaces are in electrical contact with corresponding first and second semiconductor device structures in the substrate. An insulator layer on the first surface and sidewall covers a portion of the first conductive pad on the first surface. An electrically conductive layer on part of the insulator layer on the first conductive pad and sidewall is in electrical contact with the second conductive pad. The insulator layer prevents the conductive layer from making electrical contact between the first and second conductive pads.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: Yueh-Se Ho, Yan Xun Xue
  • Publication number: 20110309454
    Abstract: A combined packaged power semiconductor device includes a flipped top source low-side MOSFET electrically connected to a top surface of a die paddle, a first metal interconnection plate connecting between a bottom drain of a high-side MOSFET or a top source of a flipped high-side MOSFET to a bottom drain of the low-side MOSFET, and a second metal interconnection plate stacked on top of the high-side MOSFET chip. The high-side, low-side MOSFET and the IC controller can be packaged three-dimensionally that reduces the overall size of semiconductor devices and can maximize the chip's size within a package of the same size and improves the performance of the semiconductor devices. The top source of flipped low-side MOSFET is connected to the top surface of the die paddle and thus is grounded through the exposed bottom surface of die paddle, which simplifies the shape of exposed bottom surface of the die paddle and maximizes the area to facilitate heat dissipation.
    Type: Application
    Filed: March 31, 2011
    Publication date: December 22, 2011
    Inventors: Yueh-Se Ho, Hamza Yilmaz, Yan Xun Xue, Jun Lu
  • Patent number: 8067822
    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: June 23, 2008
    Date of Patent: November 29, 2011
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Leeshawn Luo, Anup Bhalla, Yueh-Se Ho, Sik K. Lui, Mike Chang
  • Patent number: 8058727
    Abstract: A standing chip scale package is disclosed. The standing chip scale package provides electrical connection to bumped device contacts on both sides of the chip. The package is coupleable to a printed circuit board in a standing configuration such that front and back sides of the bumped chip are substantially perpendicular to a mounting surface. A process of fabricating the standing chip scale package is also disclosed.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: November 15, 2011
    Assignee: Alpha and Omega Semiconductor Incorporation
    Inventors: Tao Feng, Anup Bhalla, Yueh-Se Ho
  • Patent number: 8053891
    Abstract: A standing chip scale package is disclosed. The standing chip scale package provides electrical connection to bumped device contacts on both sides of the chip. The package is coupleable to a printed circuit board in a standing configuration such that front and back sides of the bumped chip are substantially perpendicular to a mounting surface. A process of fabricating the standing chip scale package is also disclosed.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 8, 2011
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Tao Feng, Anup Bhalla, Yueh-Se Ho
  • Publication number: 20110241214
    Abstract: A virtually substrate-less composite power semiconductor device (VSLCPSD) and method are disclosed. The VSLCPSD has a power semiconductor device (PSD), a front-face device carrier (FDC) made out of a carrier material and an intervening bonding layer (IBL). Both carrier and IBL material can be conductive or non-conductive. The PSD has back substrate portion, front semiconductor device portion with patterned front-face device metallization pads and a virtually diminishing thickness TPSD. The FDC has patterned back-face carrier metallizations contacting the front-face device metallization pads, patterned front-face carrier metallization pads and numerous parallelly connected through-carrier conductive vias respectively connecting the back-face carrier metallizations to the front-face carrier metallization pads. The FDC thickness TFDC is large enough to provide structural rigidity to the VSLCPSD.
    Type: Application
    Filed: March 30, 2010
    Publication date: October 6, 2011
    Inventors: Tao Feng, Yueh-Se Ho
  • Publication number: 20110227207
    Abstract: The present invention is directed to a lead-frame having a stack of semiconductor dies with interposed metalized clip structure. Level projections extend from the clip structure to ensure that the clip structure remains level during fabrication.
    Type: Application
    Filed: June 18, 2010
    Publication date: September 22, 2011
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: Hamza Yilmaz, Xiaotian Zhang, Yan Xun Xue, Anup Bhalla, Jun Lu, Kai Liu, Yueh-Se Ho, John Amato
  • Publication number: 20110227205
    Abstract: The present invention features a lead-frame package, having a first, second, third and fourth electrically conductive structures with a pair of semiconductor dies disposed therebetween defining a stacked structure. The first and second structures are spaced-apart from and in superimposition with the first structure. A semiconductor die is disposed between the first and second structures. The semiconductor die has contacts electrically connected to the first and second structures. A part of the third structure lies in a common plane with a portion of the second structure. The third structure is coupled to the semiconductor die. An additional semiconductor die is attached to one of the first and second structures. The fourth structure is in electrical contact with the additional semiconductor die. A molding compound is disposed to encapsulate a portion of said package with a sub-portion of the molding compound being disposed in the volume.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 22, 2011
    Inventors: Jun Lu, Ming Sun, Yueh-Se Ho, Kai Liu, Lei Shi
  • Publication number: 20110221005
    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 s 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: Application
    Filed: May 24, 2011
    Publication date: September 15, 2011
    Inventors: Leeshawn Luo, Anup Bhalla, Yueh-Se Ho, Sik K. Lui, Mike Chang
  • Publication number: 20110193208
    Abstract: The invention relates to a semiconductor package of a flip chip and a method for making the semiconductor package. The semiconductor chip comprises a metal-oxide-semiconductor field effect transistor. On a die paddle including a first base, a second base and a third base, half-etching or punching is performed on the top surfaces of the first base and the second base to obtain plurality of grooves that divide the top surface of the first base into a plurality of areas comprising multiple first connecting areas, and divide the top surface of the second base into a plurality of areas comprising at least a second connecting area. The semiconductor chip is connected to the die paddle at the first connecting areas and the second connecting area.
    Type: Application
    Filed: April 21, 2011
    Publication date: August 11, 2011
    Inventors: Yan Xun Xue, Yueh-Se Ho, Hamza Yilmaz, Jun Lu
  • Publication number: 20110143499
    Abstract: An electronic package for containing at least a top packaging module vertically stacked on a bottom packaging module. Each of the packaging modules includes a semiconductor chip packaged and connected by via connectors and connectors disposed on a laminated board fabricated with a standard printed-circuit board process wherein the top and bottom packaging module further configured as a surface mountable modules for conveniently stacking and mounting to prearranged electrical contacts without using a leadframe. At least one of the top and bottom packaging modules is a multi-chip module (MCM) containing at least two semiconductor chips. At least one of the top and bottom packaging modules includes a ball grid array (BGA) for surface mounting onto the prearranged electrical contacts. At least one of the top and bottom packaging modules includes a plurality of solder bumps on one of the semiconductor chips for surface mounting onto the prearranged electrical contacts.
    Type: Application
    Filed: November 8, 2010
    Publication date: June 16, 2011
    Inventors: Ming Sun, Yueh Se Ho
  • Patent number: 7955893
    Abstract: Power wafer level chip scale package (CSP) and process of manufacture are enclosed. The power wafer level chip scale package includes all source, gate and drain electrodes located on one side of the device, which is convenient for mounting to a printed circuit board (PCB) with solder paste.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: June 7, 2011
    Assignee: Alpha & Omega Semiconductor, Ltd
    Inventors: Tao Feng, François Hébert, Ming Sun, Yueh-Se Ho
  • Publication number: 20110108896
    Abstract: Power wafer level chip scale package (CSP) and process of manufacture are enclosed. The power wafer level chip scale package includes all source, gate and drain electrodes located on one side of the device, which is convenient for mounting to a printed circuit board (PCB) with solder paste.
    Type: Application
    Filed: January 14, 2011
    Publication date: May 12, 2011
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: TAO FENG, FRANÇOIS HÉBERT, MING SUN, YUEH-SE HO
  • Publication number: 20110076808
    Abstract: This invention discloses an electronic package for containing a vertical semiconductor chip that includes a laminated board having a via connector and conductive traces distributed on multiple layers of the laminated board connected to the via connector. The semiconductor chip having at least one electrode connected to the conductive traces for electrically connected to the conductive traces at a different layer on the laminated board and the via connector dissipating heat generated from the vertical semiconductor. A ball grid array (BGA) connected to the via connector functioning as contact at a bottom surface of the package for mounting on electrical terminals disposed on a printed circuit board (PCB) wherein the laminated board having a thermal expansion coefficient in substantially a same range the PCB whereby the BGA having a reliable electrical contact with the electrical terminals.
    Type: Application
    Filed: November 18, 2010
    Publication date: March 31, 2011
    Inventors: Ming Sun, Yueh Se Ho
  • Publication number: 20100320531
    Abstract: A standing chip scale package is disclosed. The standing chip scale package provides electrical connection to bumped device contacts on both sides of the chip. The package is coupleable to a printed circuit board in a standing configuration such that front and back sides of the bumped chip are substantially perpendicular to a mounting surface. A process of fabricating the standing chip scale package is also disclosed.
    Type: Application
    Filed: August 9, 2010
    Publication date: December 23, 2010
    Inventors: Tao Feng, Anup Bhalla, Yueh-Se Ho
  • Patent number: 7838977
    Abstract: This invention discloses an electronic package for containing a vertical semiconductor chip that includes a laminated board having a via connector and conductive traces distributed on multiple layers of the laminated board connected to the via connector. The semiconductor chip having at least one electrode connected to the conductive traces for electrically connected to the conductive traces at a different layer on the laminated board and the via connector dissipating heat generated from the vertical semiconductor. A ball grid array (BGA) connected to the via connector functioning as contact at a bottom surface of the package for mounting on electrical terminals disposed on a printed circuit board (PCB) wherein the laminated board having a thermal expansion coefficient in substantially a same range the PCB whereby the BGA having a reliable electrical contact with the electrical terminals.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: November 23, 2010
    Assignee: Alpha & Omega Semiconductor, Ltd.
    Inventors: Ming Sun, Yueh Se Ho
  • Patent number: 7829989
    Abstract: An electronic package for containing at least a top packaging module vertically stacked on a bottom packaging module. Each of the packaging modules includes a semiconductor chip packaged and connected by via connectors and connectors disposed on a laminated board fabricated with a standard printed-circuit board process wherein the top and bottom packaging module further configured as a surface mountable modules for conveniently stacking and mounting to prearranged electrical contacts without using a leadframe. At least one of the top and bottom packaging modules is a multi-chip module (MCM) containing at least two semiconductor chips. At least one of the top and bottom packaging modules includes a ball grid array (BGA) for surface mounting onto the prearranged electrical contacts. At least one of the top and bottom packaging modules includes a plurality of solder bumps on one of the semiconductor chips for surface mounting onto the prearranged electrical contacts.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: November 9, 2010
    Assignee: Alpha & Omega Semiconductor, Ltd.
    Inventors: Ming Sun, Yueh Se Ho
  • Patent number: 7811904
    Abstract: A method of fabricating a semiconductor device employing electroless plating including wafer backside protection during wet processing is disclosed. The method includes the steps of laminating a wafer back side and a frame with a protective tape, applying a protective coating to a peripheral portion of the wafer and an adjoining exposed area of the protective tape, the protective coating, protective tape, and wafer forming a protected wafer assembly, curing the frame-supported protective coating, cutting the protected wafer assembly from the protective tape surrounding the protective coating, wet processing the protected wafer assembly, laminating the protected wafer assembly with a second tape, dicing the wafer, and picking up the die from the protective tape.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: October 12, 2010
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Tao Feng, Ming Sun, Yueh-Se Ho, Kai Liu
  • Publication number: 20090321929
    Abstract: A standing chip scale package is disclosed. The standing chip scale package provides electrical connection to bumped device contacts on both sides of the chip. The package is coupleable to a printed circuit board in a standing configuration such that front and back sides of the bumped chip are substantially perpendicular to a mounting surface. A process of fabricating the standing chip scale package is also disclosed.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Tao Feng, Anup Bhalla, Yueh-Se Ho