Patents by Inventor Kok Khoon Ho

Kok Khoon 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: 20220028813
    Abstract: A semiconductor device includes a semiconductor wafer. A plurality of pillar bumps is formed over the semiconductor wafer. A solder is deposited over the pillar bumps. The semiconductor wafer is singulated into a plurality of semiconductor die after forming the pillar bumps while the semiconductor wafer is on a carrier. An encapsulant is deposited around the semiconductor die and pillar bumps while the semiconductor die remains on the carrier. The encapsulant covers an active surface of the semiconductor die between the pillar bumps.
    Type: Application
    Filed: October 11, 2021
    Publication date: January 27, 2022
    Applicant: Semtech Corporation
    Inventors: Kok Khoon Ho, Jonathan Clark, John MacLeod
  • Patent number: 11171099
    Abstract: A semiconductor device includes a semiconductor wafer. A plurality of pillar bumps is formed over the semiconductor wafer. A solder is deposited over the pillar bumps. The semiconductor wafer is singulated into a plurality of semiconductor die after forming the pillar bumps while the semiconductor wafer is on a carrier. An encapsulant is deposited around the semiconductor die and pillar bumps while the semiconductor die remains on the carrier. The encapsulant covers an active surface of the semiconductor die between the pillar bumps.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: November 9, 2021
    Assignee: Semtech Corporation
    Inventors: Kok Khoon Ho, Jonathan Clark, John MacLeod
  • Publication number: 20190355689
    Abstract: A semiconductor device includes a semiconductor wafer. A plurality of pillar bumps is formed over the semiconductor wafer. A solder is deposited over the pillar bumps. The semiconductor wafer is singulated into a plurality of semiconductor die after forming the pillar bumps while the semiconductor wafer is on a carrier. An encapsulant is deposited around the semiconductor die and pillar bumps while the semiconductor die remains on the carrier. The encapsulant covers an active surface of the semiconductor die between the pillar bumps.
    Type: Application
    Filed: July 29, 2019
    Publication date: November 21, 2019
    Applicant: Semtech Corporation
    Inventors: Kok Khoon Ho, Jonathan Clark, John MacLeod
  • Patent number: 10410988
    Abstract: A semiconductor device includes a semiconductor wafer. A plurality of pillar bumps is formed over the semiconductor wafer. A solder is deposited over the pillar bumps. The semiconductor wafer is singulated into a plurality of semiconductor die after forming the pillar bumps while the semiconductor wafer is on a carrier. An encapsulant is deposited around the semiconductor die and pillar bumps while the semiconductor die remains on the carrier. The encapsulant covers an active surface of the semiconductor die between the pillar bumps.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: September 10, 2019
    Assignee: Semtech Corporation
    Inventors: Kok Khoon Ho, Jonathan Clark, John MacLeod
  • Patent number: 9899285
    Abstract: A semiconductor device has a plurality of first semiconductor die. A plurality of first bumps is formed over the first semiconductor die. A first protection layer is formed over the first bumps. A portion of the first semiconductor die is removed in a backgrinding operation. A backside protection layer is formed over the first semiconductor die. An encapsulant is deposited over the first semiconductor die and first bumps. A portion of the encapsulant is removed to expose the first bumps. A conductive layer is formed over the first bumps and encapsulant. An insulating layer and plurality of second bumps are formed over the conductive layer. A plurality of conductive vias is formed through the encapsulant. A plurality of the semiconductor devices is stacked with the conductive vias electrically connecting the stacked semiconductor devices. A second semiconductor die having a through silicon via is disposed over the first semiconductor die.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: February 20, 2018
    Assignee: Semtech Corporation
    Inventors: Kok Khoon Ho, Satyamoorthi Chinnusamy
  • Publication number: 20180047688
    Abstract: A semiconductor device includes a semiconductor wafer. A plurality of pillar bumps is formed over the semiconductor wafer. A solder is deposited over the pillar bumps. The semiconductor wafer is singulated into a plurality of semiconductor die after forming the pillar bumps while the semiconductor wafer is on a carrier. An encapsulant is deposited around the semiconductor die and pillar bumps while the semiconductor die remains on the carrier. The encapsulant covers an active surface of the semiconductor die between the pillar bumps.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 15, 2018
    Applicant: Semtech Corporation
    Inventors: Kok Khoon Ho, Jonathan Clark, John MacLeod
  • Patent number: 9875988
    Abstract: A semiconductor device has a first semiconductor die disposed over a substrate. A plurality of composite interconnect structures are formed over the semiconductor die. The composite interconnect structures have a non-fusible conductive pillar and a fusible layer formed over the non-fusible conductive pillar. The fusible layer is reflowed to connect the first semiconductor die to a conductive layer of the substrate. The non-fusible conductive pillar does not melt during reflow eliminating a need to form a solder resist over the substrate. An encapsulant is deposited around the first semiconductor die and composite interconnect structures. The encapsulant flows between the active surface of the first semiconductor die and the substrate. A second semiconductor die is disposed over the substrate adjacent to the first semiconductor die. A heat spreader is disposed over the first semiconductor die. A portion of the encapsulant is removed to expose the heat spreader.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: January 23, 2018
    Assignee: Semtech Corporation
    Inventors: Satyamoorthi Chinnusamy, Weng Hing Tan, Andrew Pan, Kok Khoon Ho
  • Publication number: 20170133323
    Abstract: A semiconductor device has a first substrate. A conductive layer is formed over the first substrate. A first cavity is formed through the first substrate and extending to the conductive layer. A first semiconductor die including a plurality of first interconnect structures is disposed in the first cavity. A second substrate is disposed over the first substrate. A second cavity is formed through second substrate. A second semiconductor die including a plurality of second interconnect structures is disposed in the second cavity. A discrete device or third semiconductor die is disposed over the second semiconductor die. A plurality of third interconnect structures is formed between the second substrate and discrete device or third semiconductor die. The first, second, and third interconnect structures are reflowed simultaneously. An encapsulant is deposited over and around the first semiconductor die, the second semiconductor die, and the discrete device or third semiconductor die.
    Type: Application
    Filed: January 25, 2017
    Publication date: May 11, 2017
    Applicant: Semtech Corporation
    Inventors: Kok Khoon Ho, Satyamoorthi Chinnusamy
  • Publication number: 20170125375
    Abstract: A semiconductor device has a first semiconductor die disposed over a substrate. A plurality of composite interconnect structures are formed over the semiconductor die. The composite interconnect structures have a non-fusible conductive pillar and a fusible layer formed over the non-fusible conductive pillar. The fusible layer is reflowed to connect the first semiconductor die to a conductive layer of the substrate. The non-fusible conductive pillar does not melt during reflow eliminating a need to form a solder resist over the substrate. An encapsulant is deposited around the first semiconductor die and composite interconnect structures. The encapsulant flows between the active surface of the first semiconductor die and the substrate. A second semiconductor die is disposed over the substrate adjacent to the first semiconductor die. A heat spreader is disposed over the first semiconductor die. A portion of the encapsulant is removed to expose the heat spreader.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 4, 2017
    Applicant: Semtech Corporation
    Inventors: Satyamoorthi Chinnusamy, Weng Hing Tan, Andrew Pan, Kok Khoon Ho
  • Patent number: 9601461
    Abstract: A semiconductor device has a first substrate. A conductive layer is formed over the first substrate. A first cavity is formed through the first substrate and extending to the conductive layer. A first semiconductor die including a plurality of first interconnect structures is disposed in the first cavity. A second substrate is disposed over the first substrate. A second cavity is formed through second substrate. A second semiconductor die including a plurality of second interconnect structures is disposed in the second cavity. A discrete device or third semiconductor die is disposed over the second semiconductor die. A plurality of third interconnect structures is formed between the second substrate and discrete device or third semiconductor die. The first, second, and third interconnect structures are reflowed simultaneously. An encapsulant is deposited over and around the first semiconductor die, the second semiconductor die, and the discrete device or third semiconductor die.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: March 21, 2017
    Assignee: Semtech Corporation
    Inventors: Kok Khoon Ho, Satyamoorthi Chinnusamy
  • Publication number: 20170047308
    Abstract: A semiconductor device has a first substrate. A conductive layer is formed over the first substrate. A first cavity is formed through the first substrate and extending to the conductive layer. A first semiconductor die including a plurality of first interconnect structures is disposed in the first cavity. A second substrate is disposed over the first substrate. A second cavity is formed through second substrate. A second semiconductor die including a plurality of second interconnect structures is disposed in the second cavity. A discrete device or third semiconductor die is disposed over the second semiconductor die. A plurality of third interconnect structures is formed between the second substrate and discrete device or third semiconductor die. The first, second, and third interconnect structures are reflowed simultaneously. An encapsulant is deposited over and around the first semiconductor die, the second semiconductor die, and the discrete device or third semiconductor die.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 16, 2017
    Applicant: SEMTECH CORPORATION
    Inventors: Kok Khoon Ho, Satyamoorthi Chinnusamy
  • Publication number: 20170033026
    Abstract: A semiconductor device has a plurality of first semiconductor die. A plurality of first bumps is formed over the first semiconductor die. A first protection layer is formed over the first bumps. A portion of the first semiconductor die is removed in a backgrinding operation. A backside protection layer is formed over the first semiconductor die. An encapsulant is deposited over the first semiconductor die and first bumps. A portion of the encapsulant is removed to expose the first bumps. A conductive layer is formed over the first bumps and encapsulant. An insulating layer and plurality of second bumps are formed over the conductive layer. A plurality of conductive vias is formed through the encapsulant. A plurality of the semiconductor devices is stacked with the conductive vias electrically connecting the stacked semiconductor devices. A second semiconductor die having a through silicon via is disposed over the first semiconductor die.
    Type: Application
    Filed: July 30, 2015
    Publication date: February 2, 2017
    Applicant: SEMTECH CORPORATION
    Inventors: Kok Khoon Ho, Satyamoorthi Chinnusamy
  • Patent number: 6547121
    Abstract: An apparatus is provided wherein a substrate is mechanically clamped to a heater block of a die bonder to hold down the heated substrate before and during the die bonding operation, thereby preventing warpage of the substrate. Embodiments include a clamp comprising a plurality of spring-loaded rollers which push down opposing outer edges of the substrate onto the heater block while the substrate is being heated and die bonded. The clamp minimizes warpage of the substrate by pushing the substrate flat onto the heater block, and allows the substrate to be moved into and away from the die bonding area.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: April 15, 2003
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Sally Y. L. Foong, Kok Khoon Ho
  • Publication number: 20020106603
    Abstract: An apparatus is provided wherein a substrate is mechanically clamped to a heater block of a die bonder to hold down the heated substrate before and during the die bonding operation, thereby preventing warpage of the substrate. Embodiments include a clamp comprising a plurality of spring-loaded rollers which push down opposing outer edges of the substrate onto the heater block while the substrate is being heated and die bonded. The clamp minimizes warpage of the substrate by pushing the substrate flat onto the heater block, and allows the substrate to be moved into and away from the die bonding area.
    Type: Application
    Filed: January 19, 2001
    Publication date: August 8, 2002
    Applicant: Advanced Micro Devices, Inc.
    Inventors: Sally Y. L. Foong, Kok Khoon Ho
  • Patent number: 6383843
    Abstract: A method is provided for die bonding a semiconductor device to a substrate, which method provides adequate and consistent bondline thickness and assures that the die is spaced from the substrate a predetermined amount. Embodiments include removably attaching a flexible spacer of a predetermined thickness, such as a strip of paper or plastic, to the bonding pad of a substrate, such as an organic lead frame, so that it partially covers the bonding pad while leaving other parts of the bonding pad exposed. Die attach material, such as epoxy paste, is then applied to the exposed areas of the bonding pad, and a die is placed over the bonding pad in contact with the epoxy and the spacer. Due to the presence of the spacer, the die cannot sink when it is placed on the epoxy paste, resulting in a consistent bondline thickness equal to the spacer thickness.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: May 7, 2002
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Sally Y. L. Foong, Kok Khoon Ho