Patents by Inventor Hsichang Liu

Hsichang Liu 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: 7287468
    Abstract: A structure and associated methods of formation. The structure includes a layered configuration comprising a copper layer, a first layer, and a second layer. The copper layer consists essentially of copper. The first and second layers are disposed on opposite sides of the copper layer and are in direct mechanical contact with the copper layer. The first and second layers each consist essentially of a same alloy of nickel and cobalt having a weight percent concentration of cobalt in a range of 3% to 21%. A through hole in the layered configuration extends completely through the first layer, the copper layer, and the second layer, wherein a first opening in the layered configuration extends completely through the first layer and does not extend into any portion of the second layer.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: October 30, 2007
    Assignee: International Business Machines Corporation
    Inventors: Harry David Cox, Hsichang Liu, Nike Oluwakemi Medahunsi, Krystyna Waleria Semkow
  • Publication number: 20070113950
    Abstract: An apparatus for providing uniform axial load distribution for laminate layers of multilayer ceramic chip carriers includes a base plate configured to support a plurality of green sheet layers thereon, the base plate having at least one resiliently mounted load support bar disposed adjacent outer edges of the base plate. The load support bar is mounted on one or more biasing members such that the top surface of the support bar extends above the top surface of the base plate by a selected distance.
    Type: Application
    Filed: November 22, 2005
    Publication date: May 24, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Jay Bunt, Donald Diangelo, Cristian Docu, Thomas Foley, Melvin Gottschalk, Lisa Hamilton, Thomas Kline, Mark LaPlante, Hsichang Liu, Sebastian Loscerbo, Govindarajan Natarajan, Olga Otieno, Renee Weisman
  • Publication number: 20060269770
    Abstract: A structure and associated methods of formation. The structure includes a layered configuration comprising a copper layer, a first layer, and a second layer. The copper layer consists essentially of copper. The first and second layers are disposed on opposite sides of the copper layer and are in direct mechanical contact with the copper layer. The first and second layers each consist essentially of a same alloy of nickel and cobalt having a weight percent concentration of cobalt in a range of 3% to 21%. A through hole in the layered configuration extends completely through the first layer, the copper layer, and the second layer, wherein a first opening in the layered configuration extends completely through the first layer and does not extend into any portion of the second layer.
    Type: Application
    Filed: May 31, 2005
    Publication date: November 30, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Harry Cox, Hsichang Liu, Nike Medahunsi, Krystyna Semkow
  • Publication number: 20060243700
    Abstract: A copper core used in electroformed metal (EFM) masks is replaced with a copper/molybdenum/copper clad core (Cu/Mo/Cu). The copper cladding on the molybdenum enhances adhesion of electroplated nickel. The nickel is electro-deposited through a patterned resist template onto the copper clad molybdenum surface. The copper and molybdenum are etched by selective etchants that do not attack other non-etched layers, leaving a patterned nickel stencil on a high-strength supporting base.
    Type: Application
    Filed: April 28, 2005
    Publication date: November 2, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert Rippstein, Harry Cox, James Kuss, Hsichang Liu, Vincent LoVerso, Krystyna Semkow
  • Patent number: 7078320
    Abstract: Disclosed is a method of manufacturing integrated circuit chips that partially joins an integrated circuit wafer to a supporting wafer at a limited number of joining points. Once joined, the integrated circuit wafer is chemically-mechanically polished to reduce the thickness of the integrated circuit wafer. Then, after reducing the thickness of the integrated circuit wafer, the invention performs conventional processing on the integrated circuit wafer to form devices and wiring in the integrated circuit wafer. Next, the invention cuts through the integrated circuit wafer and the supporting wafer to form chip sections. During this cutting process, the integrated circuit wafer separates from the supporting wafer in chip sections where the integrated circuit wafer is not joined to the supporting wafer by the joining points.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: July 18, 2006
    Assignee: International Business Machines Corporation
    Inventors: Louis C. Hsu, Hsichang Liu, James R. Salimeno, III
  • Publication number: 20060145356
    Abstract: A method and structure for forming an integrated circuit chip that forms thermal conductors in a second wafer, and bonds the second wafer to a first wafer. Then circuits are formed in the first wafer. The thermal conductors in the second wafer have a higher coefficient of thermal conductivity than the second wafer and the bonding process seals the thermal conductors within the second wafer. Chip carrier connections are formed on the side of the first wafer that is opposite to the side where the first wafer is bonded to the second wafer, and then the first wafer can be bonded to a chip carrier. The second wafer has a coefficient of thermal expansion that matches a coefficient of thermal expansion of the first wafer.
    Type: Application
    Filed: January 6, 2005
    Publication date: July 6, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hsichang Liu, Louis Hsu, William Tonti
  • Publication number: 20060035443
    Abstract: Disclosed is a method of manufacturing integrated circuit chips that partially joins an integrated circuit wafer to a supporting wafer at a limited number of joining points. Once joined, the integrated circuit wafer is chemically-mechanically polished to reduce the thickness of the integrated circuit wafer. Then, after reducing the thickness of the integrated circuit wafer, the invention performs conventional processing on the integrated circuit wafer to form devices and wiring in the integrated circuit wafer. Next, the invention cuts through the integrated circuit wafer and the supporting wafer to form chip sections. During this cutting process, the integrated circuit wafer separates from the supporting wafer in chip sections where the integrated circuit wafer is not joined to the supporting wafer by the joining points.
    Type: Application
    Filed: August 10, 2004
    Publication date: February 16, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis Hsu, Hsichang Liu, James Salimeno III
  • Publication number: 20060030170
    Abstract: An improved Land Grid Array interconnect structure is provided with the use of small metal bumps on the substrate electrical contact pad. The bumps interlock with segments of the fuzz button connection and increase the physical contact surface area between the contact pad and fuss button. The improved contact reduces displacement of electrical contact points due to thermo-mechanical stress and lowers the required actuation force during assembly.
    Type: Application
    Filed: August 16, 2005
    Publication date: February 9, 2006
    Inventors: Jeffrey Brody, Hsichang Liu, Hai Longworth, James Monaco, Gerard Nuzback, Wei Zou
  • Publication number: 20050221635
    Abstract: An improved Land Grid Array interconnect structure is provided with the use of small metal bumps on the substrate electrical contact pad. The bumps interlock with segments of the fuzz button connection and increase the physical contact surface area between the contact pad and fuzz button. The improved contact reduces displacement of electrical contact points due to thermo-mechanical stress and lowers the required actuation force during assembly.
    Type: Application
    Filed: March 30, 2004
    Publication date: October 6, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Jeffrey Brody, Hsichang Liu, Hai Longworth, James Monaco, Gerard Nuzback, Wei Zou
  • Patent number: 6838009
    Abstract: A method and apparatus are provided for reworking of finishing metallurgy on pads of electronic components. The pads are copper or copper/nickel and have a layer of nickel thereon and an overlying layer of gold. The gold layer is removed first followed by the nickel layer and then the component is treated to remove etch and corrosion products. Media blasting is then used to restore the pads to their original condition as on prime parts. The pads are then replated using conventional nickel and gold plating solutions to form the reworked component.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: January 4, 2005
    Assignee: International Business Machines Corporation
    Inventors: Charles L. Arvin, Daniel G. Berger, Hsichang Liu, Krystyna W. Semkow
  • Patent number: 6662718
    Abstract: A screening mask having a stress-relieving area including an inner functional area having a pattern which is replicated on an underlying substrate, the inner functional area pattern having an one open area through which a paste is extruded and at least one tab, and an outer nonfunctional area distinct from the inner functional area, the outer nonfunctional area having a stress-relieving area adjacent to an edge of the screening mask that protects the at least one tab in the inner functional area from breaking.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: December 16, 2003
    Assignee: International Business Machines Corporation
    Inventors: Evelyn Barrington, Jeffrey A. Brody, Harry David Cox, Lorraine Di Piero-Simmonds, John J. Garant, Dinesh Gupta, Edward J. Hassdenteufel, III, Hsichang Liu, Paul G. McLaughlin, Ahmed S. Shah, Charles Timothy Ryan, Richard C. Steger, John A. Trumpetto
  • Publication number: 20030080092
    Abstract: A method and apparatus are provided for reworking of finishing metallurgy on pads of electronic components. The pads are copper or copper/nickel and have a layer of nickel thereon and an overlying layer of gold. The gold layer is removed first followed by the nickel layer and then the component is treated to remove etch and corrosion products. Media blasting is then used to restore the pads to their original condition as on prime parts. The pads are then replated using conventional nickel and gold plating solutions to form the reworked component.
    Type: Application
    Filed: October 30, 2001
    Publication date: May 1, 2003
    Applicant: International Business Machines Corporation
    Inventors: Charles L. Arvin, Daniel G. Berger, Hsichang Liu, Krystyna W. Semkow
  • Publication number: 20030004076
    Abstract: A screening mask having a stress-relieving area including an inner functional area having a pattern which is replicated on an underlying substrate, the inner functional area pattern having an one open area through which a paste is extruded and at least one tab, and an outer nonfunctional area distinct from the inner functional area, the outer nonfunctional area having a stress-relieving area adjacent to an edge of the screening mask that protects the at least one tab in the inner functional area from breaking.
    Type: Application
    Filed: June 29, 2001
    Publication date: January 2, 2003
    Applicant: International Business Machines Corporation
    Inventors: Evelyn Barrington, Jeffrey A. Brody, Harry David Cox, Lorraine Di Piero-Simmonds, John J. Garant, Dinesh Gupta, Edward J. Hassdenteufel, Hsichang Liu, Paul G. McLaughlin, Ahmed S. Shah, Charles Timothy Ryan, Richard C. Steger, John A. Trumpetto
  • Patent number: 6348233
    Abstract: A method for minimizing formation of cracks at junctions between conductive vias and conductive lines in line-to-via connections on a substrate. The method comprises providing a transition zone connected between a base section of the line and a cap, the transition zone providing a volume of conductive paste during a conductive paste screen printing operation that is greater than the volume provided by the base section being directly connected to the cap. In particular, the transition zone volume is an effective amount to prevent necking of the conductive line into the via when the mask is misaligned to the substrate within an expected alignment tolerance. The transition zone may comprise a jogged end extending from the base section to the cap at an angle to the line, or a flared end extending from the base section. Line-to-via connection structures, patterns on a mask for making such structures, and masks having such patterns are also disclosed.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: February 19, 2002
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey A. Brody, Harry D. Cox, John Garant, Hsichang Liu, Paul G. McLaughlin, Tom Wayson
  • Publication number: 20010051210
    Abstract: A method for minimizing formation of cracks at junctions between conductive vias and conductive lines in line-to-via connections on a substrate. The method comprises providing a transition zone connected between a base section of the line and a cap, the transition zone providing a volume of conductive paste during a conductive paste screen printing operation that is greater than the volume provided by the base section being directly connected to the cap. In particular, the transition zone volume is an effective amount to prevent necking of the conductive line into the via when the mask is misaligned to the substrate within an expected alignment tolerance. The transition zone may comprise a jogged end extending from the base section to the cap at an angle to the line, or a flared end extending from the base section. Line-to-via connection structures, patterns on a mask for making such structures, and masks having such patterns are also disclosed.
    Type: Application
    Filed: March 21, 2001
    Publication date: December 13, 2001
    Inventors: Jeffrey A. Brody, Harry D. Cox, John Garant, Hsichang Liu, Paul G. McLaughlin, Tom Wayson
  • Patent number: 6217989
    Abstract: A method for minimizing formation of cracks at junctions between conductive vias and conductive lines in line-to-via connections on a substrate. The method comprises providing a transition zone connected between a base section of the line and a cap, the transition zone providing a volume of conductive paste during a conductive paste screen printing operation that is greater than the volume provided by the base section being directly connected to the cap. In particular, the transition zone volume is an effective amount to prevent necking of the conductive line into the via when the mask is misaligned to the substrate within an expected alignment tolerance. The transition zone may comprise a jogged end extending from the base section to the cap at an angle to the line, or a flared end extending from the base section. Line-to-via connection structures, patterns on a mask for making such structures, and masks having such patterns are also disclosed.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: April 17, 2001
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey A. Brody, Harry D. Cox, John Garant, Hsichang Liu, Paul G. McLaughlin, Tom Wayson
  • Patent number: 5985128
    Abstract: A method for preforming electrochemical processes requiring the application of electricity on features of a substrate includes shorting out the features using a shorting layer across connectors to which the features a in electrical communication. Electricity is then applied and the process is performed.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: November 16, 1999
    Assignee: International Business Machines Corporation
    Inventors: Shaji Farooq, Suryanarayana Kaja, Hsichang Liu, Karen P. McLaughlin, Gregg B. Monjeau, Kim Hulett Ruffing
  • Patent number: 5935404
    Abstract: A method of performing electrochemistry processes on features and connectors of a substrate includes the application of a shorting layer across the connectors which are in electrical contact with the features, thereby shorting the features and creating an assemblage for which electricity is applied.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: August 10, 1999
    Assignee: International Business Machines Corporation
    Inventors: Shaji Farooq, Suryanarayana Kaja, Hsichang Liu, Karen P. McLaughlin, Gregg B. Monjeau, Kim Hulett Ruffing