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).
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Patent number: 7287468Abstract: 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: GrantFiled: May 31, 2005Date of Patent: October 30, 2007Assignee: International Business Machines CorporationInventors: Harry David Cox, Hsichang Liu, Nike Oluwakemi Medahunsi, Krystyna Waleria Semkow
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Publication number: 20070113950Abstract: 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: ApplicationFiled: November 22, 2005Publication date: May 24, 2007Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: 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
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Publication number: 20060269770Abstract: 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: ApplicationFiled: May 31, 2005Publication date: November 30, 2006Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Harry Cox, Hsichang Liu, Nike Medahunsi, Krystyna Semkow
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Publication number: 20060243700Abstract: 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: ApplicationFiled: April 28, 2005Publication date: November 2, 2006Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Robert Rippstein, Harry Cox, James Kuss, Hsichang Liu, Vincent LoVerso, Krystyna Semkow
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Patent number: 7078320Abstract: 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: GrantFiled: August 10, 2004Date of Patent: July 18, 2006Assignee: International Business Machines CorporationInventors: Louis C. Hsu, Hsichang Liu, James R. Salimeno, III
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Publication number: 20060145356Abstract: 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: ApplicationFiled: January 6, 2005Publication date: July 6, 2006Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hsichang Liu, Louis Hsu, William Tonti
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Publication number: 20060035443Abstract: 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: ApplicationFiled: August 10, 2004Publication date: February 16, 2006Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Louis Hsu, Hsichang Liu, James Salimeno III
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Publication number: 20060030170Abstract: 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: ApplicationFiled: August 16, 2005Publication date: February 9, 2006Inventors: Jeffrey Brody, Hsichang Liu, Hai Longworth, James Monaco, Gerard Nuzback, Wei Zou
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Publication number: 20050221635Abstract: 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: ApplicationFiled: March 30, 2004Publication date: October 6, 2005Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jeffrey Brody, Hsichang Liu, Hai Longworth, James Monaco, Gerard Nuzback, Wei Zou
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Patent number: 6838009Abstract: 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: GrantFiled: October 30, 2001Date of Patent: January 4, 2005Assignee: International Business Machines CorporationInventors: Charles L. Arvin, Daniel G. Berger, Hsichang Liu, Krystyna W. Semkow
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Patent number: 6662718Abstract: 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: GrantFiled: June 29, 2001Date of Patent: December 16, 2003Assignee: International Business Machines CorporationInventors: 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
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Publication number: 20030080092Abstract: 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: ApplicationFiled: October 30, 2001Publication date: May 1, 2003Applicant: International Business Machines CorporationInventors: Charles L. Arvin, Daniel G. Berger, Hsichang Liu, Krystyna W. Semkow
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Publication number: 20030004076Abstract: 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: ApplicationFiled: June 29, 2001Publication date: January 2, 2003Applicant: International Business Machines CorporationInventors: 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
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Patent number: 6348233Abstract: 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: GrantFiled: March 21, 2001Date of Patent: February 19, 2002Assignee: International Business Machines CorporationInventors: Jeffrey A. Brody, Harry D. Cox, John Garant, Hsichang Liu, Paul G. McLaughlin, Tom Wayson
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Publication number: 20010051210Abstract: 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: ApplicationFiled: March 21, 2001Publication date: December 13, 2001Inventors: Jeffrey A. Brody, Harry D. Cox, John Garant, Hsichang Liu, Paul G. McLaughlin, Tom Wayson
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Patent number: 6217989Abstract: 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: GrantFiled: December 10, 1999Date of Patent: April 17, 2001Assignee: International Business Machines CorporationInventors: Jeffrey A. Brody, Harry D. Cox, John Garant, Hsichang Liu, Paul G. McLaughlin, Tom Wayson
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Patent number: 5985128Abstract: 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: GrantFiled: May 5, 1999Date of Patent: November 16, 1999Assignee: International Business Machines CorporationInventors: Shaji Farooq, Suryanarayana Kaja, Hsichang Liu, Karen P. McLaughlin, Gregg B. Monjeau, Kim Hulett Ruffing
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Patent number: 5935404Abstract: 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: GrantFiled: January 22, 1997Date of Patent: August 10, 1999Assignee: International Business Machines CorporationInventors: Shaji Farooq, Suryanarayana Kaja, Hsichang Liu, Karen P. McLaughlin, Gregg B. Monjeau, Kim Hulett Ruffing