Patents by Inventor Lian Ser Koh

Lian Ser Koh 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: 9917034
    Abstract: A method and an apparatus for cooling a semiconductor device. The method comprises the steps of contacting a surface of the semiconductor device with respective end portions of an array of contact elements thermally coupled to a cooling fluid, and disposing a flexible, heat conductive sheet between the respective end portions of the contact elements and the surface of the semiconductor device for transferring heat generated in the semiconductor device to the cooling fluid via the sheet and the contact elements.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: March 13, 2018
    Assignee: SEMICAPS PTE LTD
    Inventors: Choon Meng Chua, Lian Ser Koh, Sze Wei Choong
  • Publication number: 20160093554
    Abstract: A method and an apparatus for cooling a semiconductor device. The method comprises the steps of contacting a surface of the semiconductor device with respective end portions of an array of contact elements thermally coupled to a cooling fluid, and disposing a flexible, heat conductive sheet between the respective end portions of the contact elements and the surface of the semiconductor device for transferring heat generated in the semiconductor device to the cooling fluid via the sheet and the contact elements.
    Type: Application
    Filed: September 26, 2014
    Publication date: March 31, 2016
    Applicant: SEMICAPS PTE LTD
    Inventors: Choon Meng CHUA, Lian Ser KOH, Sze Wei CHOONG
  • Patent number: 8891240
    Abstract: An apparatus and method for cooling a semiconductor device. The apparatus comprises a chamber configured for receiving a cooling fluid; and a plurality of contact elements comprising respective first ends disposed within the chamber; wherein, during operation, respective second ends of contact elements contact a surface of the semiconductor device for transferring heat generated in the semiconductor device to the cooling fluid.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: November 18, 2014
    Assignee: Semicaps Pte Ltd
    Inventors: Choon Meng Chua, Lian Ser Koh, Sze Wei Choong, Jacob Chee Hong Phang
  • Publication number: 20130241587
    Abstract: A wafer stage and a method of supporting a wafer for inspection. the wafer stage comprises a platform for supporting a wafer such that a backside of the wafer is suspended above a cavity of the platform; and a support structure disposed substantially within the cavity for supporting a portion of the wafer; wherein the wafer stage is adapted for relative movement of the platform with respect to the support structure for alignment of the wafer with respect to a probe.
    Type: Application
    Filed: May 6, 2013
    Publication date: September 19, 2013
    Applicant: SEMICAPS PTE LTD
    Inventors: Choon Meng Chua, Lian Ser Koh, Wah Pheng Chua, Chee Hong Jacob Phang, Soon Huat Tan
  • Patent number: 8436631
    Abstract: A wafer stage and a method of supporting a wafer for inspection. the wafer stage comprises a platform for supporting a wafer such that a backside of the wafer is suspended above a cavity of the platform; and a support structure disposed substantially within the cavity for supporting a portion of the wafer; wherein the wafer stage is adapted for relative movement of the platform with respect to the support structure for alignment of the wafer with respect to a probe.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: May 7, 2013
    Assignee: Semicaps Pte Ltd
    Inventors: Choon Meng Chua, Lian Ser Koh, Wah Pheng Chua, Chee Hong Jacob Phang, Soon Huat Tan
  • Patent number: 8278959
    Abstract: A method and system for measuring laser induced phenomena changes of at least one of a resistance, a capacitance and an inductance in a semiconductor device. The method comprises applying a biasing voltage from an emitter-follower circuit to a device under test (DUT); inducing said changes in the DUT; and measuring a voltage change in a collector portion of the emitter-follower circuit as a measure for said changes.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: October 2, 2012
    Assignee: Semicaps Pte Ltd
    Inventors: Choon Meng Chua, Lian Ser Koh, Soon Huat Tan, Wah Pheng Chua, Chee Hong Jacob Phang
  • Publication number: 20120120599
    Abstract: An apparatus and method for cooling a semiconductor device. The apparatus comprises a chamber configured for receiving a cooling fluid; and a plurality of contact elements comprising respective first ends disposed within the chamber; wherein, during operation, respective second ends of contact elements contact a surface of the semiconductor device for transferring heat generated in the semiconductor device to the cooling fluid.
    Type: Application
    Filed: August 31, 2011
    Publication date: May 17, 2012
    Inventors: Choon Meng CHUA, Lian Ser KOH, Sze Wei CHOONG, Jacob Chee Hong PHANG
  • Patent number: 8072699
    Abstract: A solid immersion lens optics assembly, a test station for probing and testing of integrated circuits on a semiconductor wafer, and a method of landing a SIL on an object. The optics assembly comprises an objective lens housing for receiving an objective lens, and a solid immersion lens (SIL) housing for mounting an SIL and adapted for connection to the objective lens housing; wherein a peripheral wall of the SIL housing comprises an integrated spring section adapted to provide a biased support for the SIL.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: December 6, 2011
    Assignee: Semicaps Pte Ltd
    Inventors: Lian Ser Koh, Choon Meng Chua, Wah Pheng Chua, Chee Hong Jacob Phang, Soon Huat Tan
  • Publication number: 20100321678
    Abstract: A solid immersion lens optics assembly, a test station for probing and testing of integrated circuits on a semiconductor wafer, and a method of landing a SIL on an object. The optics assembly comprises an objective lens housing for receiving an objective lens, and a solid immersion lens (SIL) housing for mounting an SIL and adapted for connection to the objective lens housing; wherein a peripheral wall of the SIL housing comprises an integrated spring section adapted to provide a biased support for the SIL.
    Type: Application
    Filed: June 17, 2009
    Publication date: December 23, 2010
    Applicant: SEMICAPS PTE LTD
    Inventors: Lian Ser Koh, Choon Meng Chua, Wah Pheng Chua, Chee Hong Jacob Phang, Soon Huat Tan
  • Publication number: 20100315617
    Abstract: A wafer stage and a method of supporting a wafer for inspection. the wafer stage comprises a platform for supporting a wafer such that a backside of the wafer is suspended above a cavity of the platform; and a support structure disposed substantially within the cavity for supporting a portion of the wafer; wherein the wafer stage is adapted for relative movement of the platform with respect to the support structure for alignment of the wafer with respect to a probe.
    Type: Application
    Filed: June 12, 2009
    Publication date: December 16, 2010
    Applicant: SEMICAPS PTE LTD
    Inventors: Choon Meng Chua, Lian Ser Koh, Wah Pheng Chua, Chee Hong Jacob Phang, Soon Huat Tan
  • Publication number: 20100156451
    Abstract: A method and system for measuring laser induced phenomena changes of at least one of a resistance, a capacitance and an inductance in a semiconductor device. The method comprises applying a biasing voltage from an emitter-follower circuit to a device under test (DUT); inducing said changes in the DUT; and measuring a voltage change in a collector portion of the emitter-follower circuit as a measure for said changes.
    Type: Application
    Filed: February 18, 2009
    Publication date: June 24, 2010
    Applicant: SEMICAPS Pte Ltd
    Inventors: Choon Meng Chua, Lian Ser Koh, Soon Huat Tan, Wah Pheng Chua, Chee Hong Jacob Phang
  • Patent number: 7623982
    Abstract: A method of testing an electronic circuit is provided. The method comprises radiating a laser beam onto the electronic circuit, and determining a plurality of samples of a response signal output by the electronic circuit during the period when the laser beam is radiated. The method further comprises accumulating the plurality of samples to generate a value, and generating a test result based on the value.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: November 24, 2009
    Assignee: Semicaps Pte Ltd
    Inventors: Choon Meng Chua, Alfred Cheng Teck Quah, Soon Huat Tan, Lian Ser Koh, Jacob Chee Hong Phang
  • Patent number: 7456032
    Abstract: A method and system for measuring laser induced phenomena changes of at least one of a resistance, a capacitance and an inductance in a semiconductor device. The method comprises interconnecting an electrical bridge circuit across the semiconductor device, the semiconductor device being connected as one of at least four circuit elements of the bridge circuit; inducing the changes in the semiconductor; and monitoring a balance condition of the bridge circuit.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: November 25, 2008
    Assignee: Semicaps PTE Ltd.
    Inventors: Choon Meng Chua, Lian Ser Koh, Hoo Yin Ng, Jacob Chee Hong Phang, Soon Huat Tan
  • Patent number: 6897664
    Abstract: Apparatus for and methods of inspection using laser beam induced alteration are provided. In one aspect, an apparatus is provided that includes a laser scanning microscope for directing a laser beam at a circuit structure and a source for biasing and thereby establishing a power condition in the circuit structure. A detection circuit is provided for detecting a change in the power condition in response to illumination of the circuit structure by the laser beam and generating a first output signal based on the detected change. A signal processor is provided for processing the first output signal and generating a second output signal based thereon. A control system is operable to scan the laser beam according to a pattern that has a plurality of pixel locations, whereby the laser beam may be moved to a given pixel location and allowed to dwell there for a selected time before being moved to another pixel location.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: May 24, 2005
    Assignees: Advanced Micro Devices, Inc., Semicaps Pte Ltd.
    Inventors: Michael Bruce, Gregory A. Dabney, Palaniappan Muthupalaniappan, Jiann Min Chin, Richard Jacob Wilcox, Glen Gilfeather, Brennan Davis, Jacob Phang, Choon Meng Chua, Lian Ser Koh, Hoo-Yin Ng, Soon Huat Tan