Patents by Inventor David SuitWai Ma

David SuitWai Ma 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: 7643956
    Abstract: A method and apparatus for monitoring and adjusting an analog signal of an operating circuit. The apparatus includes a control circuit, an analog-to-digital converter, and a comparator. The control circuit has an analog generator for generating the analog signal and an adjusting circuit for adjusting the strength of the analog signal. The analog-to-digital converter receives the analog signal and converts the analog signal to a digital signal. The comparator then compares the value of the digital signal to a predetermined value and generates a comparator signal. The adjusting circuit then receives the comparator signal and adjusts the strength of the analog signal based upon the value of the comparator signal. The method includes generating the analog signal, converting the analog signal to a digital signal, comparing the value of the digital signal to a predetermined value and adjusting the strength of the analog signal.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: January 5, 2010
    Assignee: Infineon Technologies AG
    Inventor: David SuitWai Ma
  • Patent number: 7539075
    Abstract: Methods and apparatuses for adjusting trim settings for internally generated voltages of an integrated circuit device are provided. In one embodiment the apparatus receives a target digital value for an internally generated voltage, and compares the target digital value to a current digital value for the internally generated voltage. If the comparison indicates that a difference between the target digital value and the current digital value is greater than an allowable threshold, a trim setting used to trim the internally generated voltage is adjusted based on the difference. The trim setting may be adjusted until the difference between the target digital value and the current digital value is less than or equal to the allowable threshold.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: May 26, 2009
    Assignee: Infineon Technologies AG
    Inventors: Jennifer Faye Huckaby, George William Alexander, Steven Michael Baker, David SuitWai Ma
  • Patent number: 7449909
    Abstract: A testing system or method compares read data from one or more dies in a semiconductor wafer with the original data written onto the one or more dies. The testing system includes one or more write registers connected to one or more dies on the semiconductor wafer. One or more comparators are connected to the dies and the write registers. The comparator generates a result in response to the original data and the read data.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: November 11, 2008
    Assignee: Infineon Technologies AG
    Inventors: David SuitWai Ma, Tao Wang, James J. Dietz, Bing Ren
  • Patent number: 7330040
    Abstract: Method and apparatus for testing a plurality of devices on a device wafer. One embodiment provides a test circuitry wafer having a first surface and a second surface, the test circuitry wafer comprising a plurality of contact pads disposed on the first surface for contacting a plurality of device pads on the device wafer, a plurality of interface pads disposed on the second surface for contacting probe needles on a probe card and one or more test features disposed in the test circuitry wafer, wherein the one or more test features are electrically connected to at least one of the contact pads and the interface pads.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 12, 2008
    Assignee: Infineon Technologies AG
    Inventor: David Suitwai Ma
  • Patent number: 7305594
    Abstract: A memory includes input/output paths and electrical leads. Each of the input/output paths are coupled to separate electrical leads. The memory is configured to operate in a test architecture and an operating architecture. In the test architecture, logic enables a greatest number of input/output paths. In the operating architecture, the memory enables the same or fewer input/output paths. The method of selecting a configuration includes establishing an operating and a test architecture and testing the memory in its greater input/output configuration.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: December 4, 2007
    Assignee: Infineon Technologies AG
    Inventors: James J. Dietz, David SuitWai Ma
  • Patent number: 7277350
    Abstract: Methods and apparatuses for adjusting trim settings for internally generated voltages of an integrated circuit device are provided. In one embodiment the apparatus receives a target digital value for an internally generated voltage, and compares the target digital value to a current digital value for the internally generated voltage. If the comparison indicates that a difference between the target digital value and the current digital value is greater than an allowable threshold, a trim setting used to trim the internally generated voltage is adjusted based on the difference. The trim setting may be adjusted until the difference between the target digital value and the current digital value is less than or equal to the allowable threshold.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: October 2, 2007
    Assignee: Infineon Technologies AG
    Inventors: Jennifer Faye Huckaby, George William Alexander, Steven Michael Baker, David SuitWai Ma
  • Patent number: 7242208
    Abstract: A testing system or method compares read data from one or more dies in a semiconductor wafer with the original data written onto the one or more dies. The testing system includes one or more write registers connected to one or more dies on the semiconductor wafer. One or more comparators are connected to the dies and the write registers. The comparator generates a result in response to the original data and the read data.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: July 10, 2007
    Assignee: Infineon Technologies AG
    Inventors: David SuitWai Ma, Tao Wang, James J. Dietz, Bing Ren
  • Patent number: 7177373
    Abstract: A method and apparatus for monitoring and adjusting an analog signal of an operating circuit. The apparatus includes a control circuit, an analog-to-digital converter, and a comparator. The control circuit has an analog generator for generating the analog signal and an adjusting circuit for adjusting the strength of the analog signal. The analog-to-digital converter receives the analog signal and converts the analog signal to a digital signal. The comparator then compares the value of the digital signal to a predetermined value and generates a comparator signal. The adjusting circuit then receives the comparator signal and adjusts the strength of the analog signal based upon the value of the comparator signal. The method includes generating the analog signal, converting the analog signal to a digital signal, comparing the value of the digital signal to a predetermined value and adjusting the strength of the analog signal.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: February 13, 2007
    Assignee: Infineon Technologies AG
    Inventor: David SuitWai Ma
  • Patent number: 7119567
    Abstract: A testing system or method compares read data from one or more dies in a semiconductor wafer with the original data written onto the one or more dies The testing system includes one or more write registers connected to one or more dies on the semiconductor wafer. One or more comparators are connected to the dies and the write registers. The comparator generates a result in response to the original data and the read data.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: October 10, 2006
    Assignee: Infineon Technologies North America Corp.
    Inventors: David SuitWai Ma, Tao Wang, James J. Dietz, Bing Ren
  • Patent number: 7071724
    Abstract: Apparatus and method for testing a device wafer having a plurality of devices formed thereon. One embodiment of the invention provides an interface wafer comprising a plurality of contact pads disposed on a first surface for contacting a plurality of device pads on the device wafer and a plurality of interface pads disposed on a second surface for contacting probe needles on a probe card, wherein the plurality of interface pads are electrically connected to the plurality of contact pads and wherein the plurality of interface pads are disposed in a relaxed-pitch arrangement as compared to the plurality of contact pads.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: July 4, 2006
    Assignee: Infineon Technologies AG
    Inventor: David Suitwai Ma
  • Patent number: 6903982
    Abstract: An integrated memory circuit and corresponding method for segmenting bit lines are provided, where the integrated memory circuit includes a sense amplifier, a layered bit line in signal communication with the sense amplifier, several segment pass transistors in signal communication with the layered bit line, several segmented bit lines, each in signal communication with a corresponding one of the several segment pass transistors, respectively, several memory cell pass transistors in signal communication with one of the several segmented bit lines, and a plurality of memory cell capacitors, each in signal communication with a corresponding one of the plurality of memory cell transistors, respectively; and where the corresponding method for segmenting bit lines includes receiving a memory cell address, activating a memory cell pass transistor with a wordline corresponding to the memory cell address, receiving a signal indicative of the memory cell charge level on a segmented bit line through the memory cell tra
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: June 7, 2005
    Assignee: Infineon Technologies AG
    Inventors: David SuitWai Ma, Aiqin Chen
  • Patent number: 6754113
    Abstract: A data topography correction circuit for a semiconductor memory device and method for testing the device is provided. The data topography correction circuit includes a redundant hit circuit for determining if a redundant element has been used to replace a defective element; and a redundant topology correction scrambler circuit for converting data from a data topology of the defective element to a data topology of the redundant element. The method includes the steps of providing an address of a memory array element of the device to be tested; determining if the memory array element has been replaced with a redundant element; and, if the memory array element has been replaced, correcting test data to the data topology of the redundant element.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: June 22, 2004
    Assignee: Infineon Technologies AG
    Inventors: David Suitwai Ma, Paul Edward Brucke
  • Publication number: 20040103346
    Abstract: A memory includes input/output paths and electrical leads. Each of the input/output paths are coupled to separate electrical leads. The memory is configured to operate in a test architecture and an operating architecture. In the test architecture, logic enables a greatest number of input/output paths. In the operating architecture, the memory enables the same or fewer input/output paths. The method of selecting a configuration includes establishing an operating and a test architecture and testing the memory in its greater input/output configuration.
    Type: Application
    Filed: November 25, 2002
    Publication date: May 27, 2004
    Applicant: Infineon Technologies North America Corp.
    Inventors: James J. Dietz, David SuitWai Ma
  • Publication number: 20040073745
    Abstract: An integrated memory circuit and corresponding method for segmenting bit lines are provided, where the integrated memory circuit includes a sense amplifier, a layered bit line in signal communication with the sense amplifier, several segment pass transistors in signal communication with the layered bit line, several segmented bit lines, each in signal communication with a corresponding one of the several segment pass transistors, respectively, several memory cell pass transistors in signal communication with one of the several segmented bit lines, and a plurality of memory cell capacitors, each in signal communication with a corresponding one of the plurality of memory cell transistors, respectively; and where the corresponding method for segmenting bit lines includes receiving a memory cell address, activating a memory cell pass transistor with a wordline corresponding to the memory cell address, receiving a signal indicative of the memory cell charge level on a segmented bit line through the memory cell tra
    Type: Application
    Filed: October 10, 2002
    Publication date: April 15, 2004
    Applicant: Infineon Technologies North America Corp.
    Inventors: David SuitWai Ma, Aiqin Chen
  • Patent number: 6721180
    Abstract: A cooling hood for a circuit board is provided. The circuit board includes at least one semiconductor device. The cooling hood includes a duct mounted onto the circuit board and surrounding at least a portion of the semiconductor device. The duct forms an inlet and an outlet. A cooling medium enters the duct through the inlet and exits the duct through the outlet.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: April 13, 2004
    Assignee: Infineon Technologies AG
    Inventors: Thoai-Thai Le, Guenter Gerstmeier, David SuitWai Ma, Tao Wang
  • Publication number: 20040057296
    Abstract: A data topography correction circuit for a semiconductor memory device and method for testing the device is provided. The data topography correction circuit includes a redundant hit circuit for determining if a redundant element has been used to replace a defective element; and a redundant topology correction scrambler circuit for converting data from a data topology of the defective element to a data topology of the redundant element. The method includes the steps of providing an address of a memory array element of the device to be tested; determining if the memory array element has been replaced with a redundant element; and, if the memory array element has been replaced, correcting test data to the data topology of the redundant element.
    Type: Application
    Filed: September 24, 2002
    Publication date: March 25, 2004
    Applicant: Infineon Technologies North America Corp.
    Inventors: David Suitwai Ma, Paul Edward Brucke
  • Publication number: 20040054951
    Abstract: A testing system or method compares read data from one or more dies in a semiconductor wafer with the original data written onto the one or more dies The testing system includes one or more write registers connected to one or more dies on the semiconductor wafer. One or more comparators are connected to the dies and the write registers. The comparator generates a result in response to the original data and the read data.
    Type: Application
    Filed: September 12, 2002
    Publication date: March 18, 2004
    Inventors: David SuitWai Ma, Tao Wang, James J. Dietz, Bing Ren
  • Publication number: 20040051550
    Abstract: A semiconductor die isolation system electrically disconnects the semiconductor die from a routing mechanism when an isolation block is activated. The semiconductor die is tested through a routing mechanism connection with a testing device on a semiconductor wafer. The isolation block is activated when the testing is completed.
    Type: Application
    Filed: September 12, 2002
    Publication date: March 18, 2004
    Inventors: David Suitwai Ma, George W. Alexander, James J. Dietz
  • Patent number: 6702589
    Abstract: An apparatus for mounting a semiconductor device to a circuit board for testing is disclosed. The semiconductor device includes semiconductor circuitry and leads to connect the semiconductor circuitry to the circuit board. Additionally, the semiconductor device is decapped so that at least a portion of the semiconductor circuitry is exposed. The apparatus includes a frame and a fastener. The frame is adapted to mate with the semiconductor device, and forms an opening for accessing the semiconductor circuitry and an edge surface for receiving the semiconductor device. The fastener is connected with the frame for removably connecting the frame to the circuit board. By using a frame instead of a socket, the distance to the semiconductor device once the device is mounted to the circuit board, and particularly the top side of the semiconductor device, can be reduced so that the device may be tested using a probe.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: March 9, 2004
    Assignee: Infineon Technologies AG
    Inventors: David SuitWai Ma, Bing Ren, James J. Dietz
  • Publication number: 20040033707
    Abstract: An apparatus for mounting a semiconductor device to a circuit board for testing is disclosed. The semiconductor device includes semiconductor circuitry and leads to connect the semiconductor circuitry to the circuit board. Additionally, the semiconductor device is decapped so that at least a portion of the semiconductor circuitry is exposed. The apparatus includes a frame and a fastener. The frame is adapted to mate with the semiconductor device, and forms an opening for accessing the semiconductor circuitry and an edge surface for receiving the semiconductor device. The fastener is connected with the frame for removably connecting the frame to the circuit board. By using a frame instead of a socket, the distance to the semiconductor device once the device is mounted to the circuit board, and particularly the top side of the semiconductor device, can be reduced so that the device may be tested using a probe.
    Type: Application
    Filed: August 16, 2002
    Publication date: February 19, 2004
    Applicant: Infineon Technologies North America Corp.
    Inventors: David SuitWai Ma, Bing Ren, James J. Dietz