Patents by Inventor Louis Lu

Louis Lu 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).

  • Publication number: 20090121312
    Abstract: A semiconductor processing method includes providing a substrate, forming a plurality of semiconductor layers in the substrate, each of the semiconductor layers being distinct and selected from different groups of semiconductor element types. The semiconductor layers include a first, second, and third semiconductor layers. The method further includes forming a plurality of lateral void gap isolation regions for isolating portions of each of the semiconductor layers from portions of the other semiconductor layers.
    Type: Application
    Filed: January 31, 2008
    Publication date: May 14, 2009
    Inventors: Howard Hao Chen, Louis Lu-Chen Hsu, Jack Allan Mandelman
  • Patent number: 7531423
    Abstract: In a first aspect, a first method of manufacturing a finFET is provided. The first method includes the steps of (1) providing a substrate; and (2) forming at least one source/drain diffusion region of the finFET on the substrate. Each source/drain diffusion region includes (a) an interior region of unsilicided silicon; and (b) silicide formed on a top surface and sidewalls of the region of unsilicided silicon. Numerous other aspects are provided.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: May 12, 2009
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Cheng, Louis Lu-Chen Hsu, Jack Allan Mandelman, Haining Yang
  • Publication number: 20090115448
    Abstract: A design structure for an impedance matcher that automatically matches impedance between a driver and a receiver. The design structure for an impedance matcher includes a phase-locked loop (PLL) circuit that locks onto a data signal provided by the driver. The impedance matcher also includes tunable impedance matching circuitry responsive to one or more voltage-controlled oscillator control signals within the PLL circuit so as to generate an output signal that is impedance matched with the receiver.
    Type: Application
    Filed: November 5, 2007
    Publication date: May 7, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wagdi W. Abadeer, Louis Lu-Chen Hsu, Jack A. Mandelman
  • Patent number: 7525121
    Abstract: In a first aspect, a first method is provided for semiconductor device manufacturing. The first method includes the steps of (1) providing a substrate; and (2) forming a first silicon-on-insulator (SOI) region having a first crystal orientation, a second SOI region having a second crystal orientation and a third SOI region having a third crystal orientation on the substrate. The first, second and third SOI regions are coplanar. Numerous other aspects are provided.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: April 28, 2009
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack A. Mandelman
  • Patent number: 7525170
    Abstract: An arrangement of pillar shaped p-i-n diodes having a high aspect ration are formed on a semiconductor substrate. Each device is formed by an intrinsic or lightly doped region (i-region) positioned between a P+ region and an N+ region at each end of the pillar. The arrangement of pillar p-i-n diodes is embedded in an optical transparent medium. For a given surface area, more light energy is absorbed by the pillar arrangement of p-i-n diodes than by conventional planar p-i-n diodes. The pillar p-i-n diodes are preferably configured in an array formation to enable photons reflected from one pillar p-i-n diode to be captured and absorbed by another p-i-n diode adjacent to the first one, thereby optimizing the efficiency of energy conversion.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: April 28, 2009
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack A. Mandelman, Kangguo Cheng
  • Patent number: 7515502
    Abstract: A method for using photolithographic dummy memory cells arranged in rings around a set of primary memory cells as test structures and as redundant memory cells. Also circuits and structures of memory arrays having multiple-use dummy memory cells.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: April 7, 2009
    Assignee: International Business Machines Corporation
    Inventors: Ishtiaq Ahsan, Louis Lu-Chen Hsu, Xu Ouyang
  • Publication number: 20090073796
    Abstract: A method for using photolithographic dummy memory cells arranged in rings around a set of primary memory cells as test structures and as redundant memory cells. Also circuits and structures of memory arrays having multiple-use dummy memory cells.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 19, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ishtiaq Ahsan, Louis Lu-Chen Hsu, Xu Ouyang
  • Patent number: 7494916
    Abstract: Design structure embodied in a machine readable medium for designing, manufacturing, or testing a design. The design structure includes an interconnect structure with a liner formed on roughened dielectric material in an insulating layer and a conformal liner repair layer bridging that breaches in the liner. The conformal liner repair layer is formed of a conductive material, such as a cobalt-containing material. The conformal liner repair layer may be particularly useful for repairing discontinuities in a conductive liner disposed on roughened dielectric material bordering the trenches and vias of damascene interconnect structures.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: February 24, 2009
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti, Chih-Chao Yang
  • Patent number: 7491994
    Abstract: In a first aspect, a first apparatus is provided. The first apparatus is a memory cell that includes (1) a semiconductor fin enclosure formed on an insulating layer of a substrate; and (2) a ferromagnetic material within the semiconductor fin enclosure. A top surface of the ferromagnetic material is below a top surface of the semiconductor fin enclosure. Numerous other aspects are provided.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: February 17, 2009
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Cheng, Herbert Lei Ho, Louis Lu-Chen Hsu, Jack Allan Mandelman
  • Patent number: 7489025
    Abstract: A semiconductor package includes an SOI wafer having a first side including an integrated circuit system, and a second side, opposite the first side, forming at least one cavity. At least one chip or component is placed in the cavity. An optical through via is formed through a buried oxide which optically connects the chip(s) to the integrated circuit system.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: February 10, 2009
    Assignee: International Business Machines Corporation
    Inventors: Howard Hao Chen, Louis Lu-Chen Hsu
  • Patent number: 7482672
    Abstract: Semiconductor device structures for use with bipolar junction transistors and methods of fabricating such semiconductor device structures. The semiconductor device structure comprises a semiconductor body having a top surface and sidewalls extending from the top surface to an insulating layer, a first region including a first semiconductor material with a first conductivity type, and a second region including a second semiconductor material with a second conductivity type. The first and second regions each extend across the top surface and the sidewalls of the semiconductor body. The device structure further comprises a junction defined between the first and second regions and extending across the top surface and the sidewalls of the semiconductor body.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: January 27, 2009
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Cheng, Louis Lu-Chen Hsu, Jack Allan Mandelman
  • Patent number: 7479437
    Abstract: A method of reducing contact resistance on a silicon-on-insulator includes exposing sidewalls and a portion of a top surface of a source/drain region of the device, forming a porous silicon layer within a surface of the source/drain region, implanting dopants in the source/drain region, and forming a silicide layer over the source/drain region. The porous silicon layer is formed by forming a layer of p+ doping on the exposed sidewalls and portion of the top surface of the source/drain region, forming a nitride liner over the device, including the source/drain region and the layer of p+ doping, forming a planarized resist over the nitride liner, recessing the planarized resist and etching the nitride liner to expose portions of the source/drain region, and forming the porous silicon layer on the exposed portions of the source drain region.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: January 20, 2009
    Assignee: International Business Machines Corporation
    Inventors: Brian J Greene, Louis Lu-Chen Hsu, Jack Allan Mandelman, Chun-Yung Sung
  • Patent number: 7473985
    Abstract: A semiconductor structure with an insulating layer on a silicon substrate, a plurality of electrically-isolated silicon-on-insulator (SOI) regions separated from the substrate by the insulating layer, and a plurality of electrically-isolated silicon bulk regions extending through the insulating layer to the substrate. Each of one number of the SOI regions is oriented with a first crystal orientation and each of another number of the SOI regions is oriented with a second crystal orientation that differs from the first crystal orientation. The bulk silicon regions are each oriented with a third crystal orientation. Damascene or imprinting methods of forming the SOI regions and bulk silicon regions are also provided.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: January 6, 2009
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti
  • Publication number: 20090007036
    Abstract: Embodiments of the invention generally relate to methods, systems and design structures for semiconductor devices, and more specifically to interconnecting semiconductor devices. A silicide layer may be formed on selective areas of a fin structure connecting one or more semiconductor devices or semiconductor device components. By providing silicided fin structures to locally interconnect semiconductor devices, the use of metal contacts and metal layers may be obviated, thereby allowing formation of smaller, less complex circuits.
    Type: Application
    Filed: October 26, 2007
    Publication date: January 1, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kangguo Cheng, Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti
  • Publication number: 20090007037
    Abstract: Embodiments of the invention generally relate to methods, systems and design structures for semiconductor devices and more specifically to forming partially silicided and fully silicided structures. Fabricating the partially silicided and fully silicided structures may involve creating one or more gate stacks. A polysilicon layer of a first gate stack may be exposed and a first metal layer may be deposited thereon to create a partially silicided structure. Thereafter, a polysilicon layer of a second gate stack may be exposed and a second metal layer may be deposited thereon to form a fully silicided structure. In some embodiments, the polysilicon layers of one or more gate stacks may not be exposed, and resistors may be formed with the unsilicided polysilicon layers.
    Type: Application
    Filed: October 26, 2007
    Publication date: January 1, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti, Chih-Chao Yang
  • Publication number: 20090001426
    Abstract: Embodiments of the invention generally relate to semiconductor devices, and more specifically to interconnecting semiconductor devices. A silicide layer may be formed on selective areas of a fin structure connecting one or more semiconductor devices or semiconductor device components. By providing silicided fin structures to locally interconnect semiconductor devices, the use of metal contacts and metal layers may be obviated, thereby allowing formation of smaller, less complex circuits.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventors: Kangguo Cheng, Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti
  • Publication number: 20090001477
    Abstract: Embodiments of the invention generally relate to semiconductor devices and more specifically to forming partially silicided and fully silicided structures. Fabricating the partially silicided and fully silicided structures may involve creating one or more gate stacks. A polysilicon layer of a first gate stack may be exposed and a first metal layer may be deposited thereon to create a partially silicided structure. Thereafter, a polysilicon layer of a second gate stack may be exposed and a second metal layer may be deposited thereon to form a fully silicided structure. In some embodiments, the polysilicon layers of one or more gate stacks may not be exposed, and resistors may be formed with the unsilicided polysilicon layers.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti, Chih-Chao Yang
  • Patent number: 7471101
    Abstract: Systems and methods for controlling electro-migration, and reducing the deleterious effects thereof, are disclosed. Embodiments provide for reversal of an applied voltage to an integrated circuit when a measurement indicative of an extent of electro-migration indicates that a healing cycle of operation is warranted. During the healing cycle, circuits of the integrated circuit function normally, but electro-migration effects are reversed. In one embodiment, micro-electro-mechanical switches are provided at a lowest level of metallization to switch the direction of current through the levels of metallization of the integrated circuit. In another embodiment, if the measurement indicative of the extent of electro-migration exceeds a reference level by a specifiable amount, then the voltage applied to the integrated circuit is reversed in polarity to cause current to switch directions to counter electro-migration.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: December 30, 2008
    Assignee: International Business Machines Corporation
    Inventors: Hayden Clavie Cranford, Jr., Louis Lu-Chen Hsu, James Stephen Mason, Chih-Chao Yang
  • Publication number: 20080318360
    Abstract: A semiconductor package includes an SOI wafer having a first side including an integrated circuit system, and a second side, opposite the first side, forming at least one cavity. At least one chip or component is placed in the cavity. An optical through via is formed through a buried oxide which optically connects the chip(s) to the integrated circuit system.
    Type: Application
    Filed: August 27, 2008
    Publication date: December 25, 2008
    Inventors: HOWARD HAO CHEN, LOUIS LU-CHEN HSU
  • Patent number: 7460003
    Abstract: An electronic fuse for an integrated circuit and a method of fabrication thereof are presented. The electronic fuse has a first terminal portion and a second terminal portion interconnected by a fuse element. The fuse element has a convex upper surface and a lower surface with a radius of curvature at a smallest surface area of curvature less than or equal to 100 nanometers. Fabricating the electronic fuse includes forming an at least partially freestanding dielectric spacer above a supporting structure, and then conformably forming the fuse element of the fuse over at least a portion of the freestanding dielectric spacer, with the fuse element characterized as noted above. The dielectric spacer may remain in place as a thermally insulating layer underneath the fuse element, or may be removed to form a void underneath the fuse element.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: December 2, 2008
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack A. Mandelman, William R. Tonti, Chih-Chao Yang