Patents by Inventor Lakshmikanth Namburi

Lakshmikanth Namburi 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: 10859602
    Abstract: Transferring electronic probe assemblies to space transformers. In accordance with a first method embodiment, a plurality of probes is formed in a sacrificial material on a sacrificial substrate via microelectromechanical systems (MEMS) processes. The tips of the plurality of probes are formed adjacent to the sacrificial substrate and the remaining structure of the plurality of probes extends outward from the sacrificial substrate. The sacrificial material comprising the plurality of probes is attached to a space transformer. The space transformer includes a plurality of contacts on one surface for contacting the plurality of probes at a probe pitch and a corresponding second plurality of contacts on another surface at a second pitch, larger than the probe pitch, wherein each of the second plurality of contacts is electrically coupled to a corresponding one of the plurality of probes. The sacrificial substrate is removed, and the sacrificial material is removed, leaving the plurality of probes intact.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: December 8, 2020
    Inventors: Lakshmikanth Namburi, Florent Cros
  • Patent number: 9599665
    Abstract: A method for testing a semiconductor device is disclosed. The method comprises positioning a probe card comprising a plurality of probes above the semiconductor device and moving the probe card in a vertical direction towards the semiconductor device. The plurality of probes are moving in a vertical direction towards a plurality of electrical structures of the semiconductor device until each probe of the plurality of probes has made mechanical contact with a corresponding electrical structure of the plurality of electrical structures with a minimum quantity of force. The each probe of the plurality of probes absorbs a portion of vertical overdrive after contacting their corresponding electrical structures. The probe card absorbs any remaining vertical overdrive. The vertical overdrive is a continuing vertical movement of the plurality of probes after a first probe of the plurality of probes mechanically contacts a first corresponding electrical structure.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: March 21, 2017
    Assignee: ADVANTEST CORPORATION
    Inventors: Ting Hu, Lakshmikanth Namburi
  • Patent number: 9335347
    Abstract: Disclosed herein is a cost effective, efficient, massively parallel multi-wafer test cell. Additionally, this test cell can be used for both single-touchdown and multiple-touchdown applications. The invention uses a novel “split-cartridge” design, combined with a method for aligning wafers when they are separated from the probe card assembly, to create a cost effective, efficient multi-wafer test cell. A “probe-card stops” design may be used within the cartridge to simplify the overall cartridge design and operation.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: May 10, 2016
    Assignee: ADVANTEST CORPORATION
    Inventors: John W. Andberg, Ira H. Leventhal, Matthew W. Losey, Yohannes Desta, Lakshmikanth Namburi, Vincent E. Lopopolo, Sanjeev Grover, Erik Volkerink
  • Patent number: 9250290
    Abstract: A method for testing a semiconductor device. The method comprises moving a probe in a vertical direction towards an electrical structure on a semiconductor device to position the probe alongside the electrical structure. A tip of the probe is positioned lower than an elevation of an outermost periphery of the electrical structure. The method also includes moving the probe in a lateral direction towards the electrical structure to contact the electrical structure. The probe tip mechanically and electrically engages the electrical structure.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: February 2, 2016
    Assignee: ADVANTEST CORPORATION
    Inventors: Lakshmikanth Namburi, Florent Cros, Yohannes Desta
  • Patent number: 8901950
    Abstract: Microelectronic contactors on a probe contactor substrate, or adhesive elements on a probe contactor or space transformer substrate, are protected by a sacrificial material as 1) the microelectronic contactors or adhesive elements are planarized, or 2) a surface of the substrate on which the microelectronic contactors or adhesive elements are formed is planarized. The adhesive elements are used to bond the probe contactor substrate to the space transformer substrate.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: December 2, 2014
    Assignee: Advantest America, Inc
    Inventors: Yohannes Desta, Lakshmikanth Namburi, Matthew Losey
  • Publication number: 20140070828
    Abstract: Disclosed herein is a cost effective, efficient, massively parallel multi-wafer test cell. Additionally, this test cell can be used for both single-touchdown and multiple-touchdown applications. The invention uses a novel “split-cartridge” design, combined with a method for aligning wafers when they are separated from the probe card assembly, to create a cost effective, efficient multi-wafer test cell. A “probe-card stops” design may be used within the cartridge to simplify the overall cartridge design and operation.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Inventors: John W. Andberg, Ira H. Leventhal, Matthew W. Losey, Yohannes Desta, Lakshmikanth Namburi, Vincent E. Lopopolo, Sanjeev Grover, Erik Volkerink
  • Publication number: 20130285688
    Abstract: A method for testing a semiconductor device. The method comprises moving a probe in a vertical direction towards an electrical structure on a semiconductor device to position the probe alongside the electrical structure. A tip of the probe is positioned lower than an elevation of an outermost periphery of the electrical structure. The method also includes moving the probe in a lateral direction towards the electrical structure to contact the electrical structure. The probe tip mechanically and electrically engages the electrical structure.
    Type: Application
    Filed: March 25, 2013
    Publication date: October 31, 2013
    Inventors: Lakshmikanth NAMBURI, Florent CROS, Yohannes DESTA
  • Publication number: 20130234746
    Abstract: Shielded probe array. In accordance with a first embodiment, an article of manufacture includes a plurality of rows of electronic probes. Each row of probes is substantially in a plane. Each probe includes a metal signal layer and a ground layer, separated by an insulator. The article of manufacture also includes a space transformer for mechanically supporting the plurality of rows of electronic probes. The space transformer also provides an electrical path from each of the probe metal signal layers and the probe ground layers to a higher level electronic assembly. Each of the plurality of rows of electronic probes may include a handle including a substrate for handling the row of electronic probes.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: ADVANTEST CORPORATION
    Inventor: Lakshmikanth NAMBURI
  • Publication number: 20130234748
    Abstract: Transferring electronic probe assemblies to space transformers. In accordance with a first method embodiment, a plurality of probes is formed in a sacrificial material on a sacrificial substrate via microelectromechanical systems (MEMS) processes. The tips of the plurality of probes are formed adjacent to the sacrificial substrate and the remaining structure of the plurality of probes extends outward from the sacrificial substrate. The sacrificial material comprising the plurality of probes is attached to a space transformer. The space transformer includes a plurality of contacts on one surface for contacting the plurality of probes at a probe pitch and a corresponding second plurality of contacts on another surface at a second pitch, larger than the probe pitch, wherein each of the second plurality of contacts is electrically coupled to a corresponding one of the plurality of probes. The sacrificial substrate is removed, and the sacrificial material is removed, leaving the plurality of probes intact.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: ADVANTEST CORPORATION
    Inventors: Lakshmikanth NAMBURI, Florent CROS
  • Publication number: 20130234747
    Abstract: Fine pitch probe array from bulk material. In accordance with a first method embodiment, an article of manufacture includes an array of probes. Each probe includes a probe tip, suitable for contacting an integrated circuit test point. Each probe tip is mounted on a probe finger structure. All of the probe finger structures of the array have the same material grain structure. The probe fingers may have a non-linear profile and/or be configured to act as a spring.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: ADVANTEST CORPORATION
    Inventor: Lakshmikanth Namburi
  • Patent number: 8305101
    Abstract: A plurality of inserts are anchored in holes or recesses in a probe head. Shafts are coupled to the inserts, and adjustable multi-part fasteners are attached to the shafts and to a stiffener. The multi-part fasteners are operated to move the shafts and couple the probe head, the stiffener, and other components of a microelectronic contactor assembly. In some embodiments, the inserts may be anchored in the probe head using an adhesive. In some embodiments, the probe head may comprise more than one major substrate, and the inserts may be anchored in either of the substrates.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: November 6, 2012
    Assignee: Advantest America, Inc
    Inventors: Yohannes Desta, Chang Huang, Lakshmikanth Namburi, Matthew Losey
  • Patent number: 8232818
    Abstract: A probe head for a microelectronic contactor assembly includes a space transformer substrate and a probe contactor substrate. Surface mount technology (SMT) electronic components are positioned close to conductive elements on the probe contactor substrate by placing the SMT electronic components in cavities in the probe contactor substrate, which cavities may be through-hole or non-through-hole cavities. In some cases, the SMT electronic components may be placed on pedestal substrates. SMT electronic components may also be positioned between the probe contactor and space transformer substrates.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: July 31, 2012
    Assignee: Advantest America, Inc.
    Inventors: Yohannes Desta, Lakshmikanth Namburi, Matthew Losey
  • Publication number: 20100308854
    Abstract: The present invention is directed to a probe head having a probe contactor substrate with at least one slot that passes through the probe contactor substrate, at least one probe contactor adapted to test a device under test, with the probe contactor being coupled to the a top side of the probe contactor substrate and electrically connected to a terminal also disposed on top of the probe contactor substrate, and a space transformer having at least one bond pad coupled to a top side of the space transformer, and a bond interconnect which electrically couples the bond pad to the terminal through the slot in the probe contactor substrate.
    Type: Application
    Filed: April 5, 2010
    Publication date: December 9, 2010
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Raffi Garabedian, Salleh Ismail, Lakshmikanth Namburi
  • Publication number: 20100237887
    Abstract: A plurality of inserts are anchored in holes or recesses in a probe head. Shafts are coupled to the inserts, and adjustable multi-part fasteners are attached to the shafts and to a stiffener. The multi-part fasteners are operated to move the shafts and couple the probe head, the stiffener, and other components of a microelectronic contactor assembly. In some embodiments, the inserts may be anchored in the probe head using an adhesive. In some embodiments, the probe head may comprise more than one major substrate, and the inserts may be anchored in either of the substrates.
    Type: Application
    Filed: February 19, 2010
    Publication date: September 23, 2010
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Yohannes Desta, Chang Huang, Lakshmikanth Namburi, Matthew Losey
  • Publication number: 20100237888
    Abstract: Microelectronic contactors on a probe contactor substrate, or adhesive elements on a probe contactor or space transformer substrate, are protected by a sacrificial material as 1) the microelectronic contactors or adhesive elements are planarized, or 2) a surface of the substrate on which the microelectronic contactors or adhesive elements are formed is planarized. The adhesive elements are used to bond the probe contactor substrate to the space transformer substrate.
    Type: Application
    Filed: February 19, 2010
    Publication date: September 23, 2010
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Yohannes Desta, Lakshmikanth Namburi, Matthew Losey
  • Publication number: 20100237889
    Abstract: A probe head for a microelectronic contactor assembly includes a space transformer substrate and a probe contactor substrate. Surface mount technology (SMT) electronic components are positioned close to conductive elements on the probe contactor substrate by placing the SMT electronic components in cavities in the probe contactor substrate, which cavities may be through-hole or non-through-hole cavities. In some cases, the SMT electronic components may be placed on pedestal substrates. SMT electronic components may also be positioned between the probe contactor and space transformer substrates.
    Type: Application
    Filed: February 19, 2010
    Publication date: September 23, 2010
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Yohannes Desta, Lakshmikanth Namburi, Matthew Losey
  • Patent number: 7761966
    Abstract: A method for repairing a damaged probe from a probe card comprising the steps of removing the damaged probe from the probe card, separating one a plurality of replacement probes from a substrate and installing the one probe separated from the plurality of replacement probes where the damaged probe was removed.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: July 27, 2010
    Assignee: Touchdown Technologies, Inc.
    Inventors: Lakshmikanth Namburi, Raffi Garabedian
  • Patent number: 7692436
    Abstract: The present invention is directed to a probe head having a probe contactor substrate with at least one slot that passes through the probe contactor substrate, at least one probe contactor adapted to test a device under test, with the probe contactor being coupled to the a top side of the probe contactor substrate and electrically connected to a terminal also disposed on top of the probe contactor substrate, and a space transformer having at least one bond pad coupled to a top side of the space transformer, and a bond interconnect which electrically couples the bond pad to the terminal through the slot in the probe contactor substrate.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: April 6, 2010
    Assignee: Touchdown Technologies, Inc.
    Inventors: Raffi Garabedian, Salleh Ismail, Lakshmikanth Namburi
  • Publication number: 20090237099
    Abstract: The present invention is directed to a probe head having a probe contactor substrate with at least one slot that passes through the probe contactor substrate, at least one probe contactor adapted to test a device under test, with the probe contactor being coupled to the a top side of the probe contactor substrate and electrically connected to a terminal also disposed on top of the probe contactor substrate, and a space transformer having at least one bond pad coupled to a top side of the space transformer, and a bond interconnect which electrically couples the bond pad to the terminal through the slot in the probe contactor substrate.
    Type: Application
    Filed: March 20, 2008
    Publication date: September 24, 2009
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Raffi Garabedian, Salleh Ismail, Lakshmikanth Namburi
  • Publication number: 20090072851
    Abstract: A novel probe design is presented that comprises a plurality of pivots. These pivots allow the probe to store the displacement energy more efficiently. The novel probe comprises a substrate, and a probe connected to the substrate. The probe further comprises a base that is connected to the substrate, a bending element connected to the base and a probe tip connected to the bending element. In one embodiment, the plurality of pivots may be connected to the substrate such that a portion of the probe may contact the plurality of pivots while the probe tip contacts the device. In another embodiment, the plurality of pivots is connected to the bending element, such that the plurality of pivots may contact the substrate while the probe tip contacts the device. The bending element may also comprise a forked bending element connected to the base, such as the forked bending structure described in co-pending and related patent application Ser. No. 11/855,094.
    Type: Application
    Filed: September 10, 2008
    Publication date: March 19, 2009
    Applicant: TOUCHDOWN TECHNOLOGIES, INC.
    Inventors: Lakshmikanth Namburi, Salleh Ismail