Patents by Inventor Louis L. Hsu

Louis L. Hsu 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: 20090278260
    Abstract: An IC interconnect for high direct current (DC) that is substantially immune to electro-migration (EM) damage, a design structure of the IC interconnect and a method of manufacture of the IC interconnect is provided. The structure has electro-migration immunity and redundancy of design, which includes a plurality of wires laid out in parallel and each of which are coated with a liner material. Two adjacent of the wires are physically contacted to each other.
    Type: Application
    Filed: May 6, 2008
    Publication date: November 12, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis L. Hsu, Conal E. Murray, Ping-Chuan Wang, Chih-Chao Yang
  • Publication number: 20090280636
    Abstract: Methods are provided for fabricating interconnect structures containing various capping materials for electrical fuses and other related applications. The method includes forming a first interconnect structure having a first interfacial structure and forming a second interconnect structure adjacent to the first structure. The second interconnect structure is formed with a second interfacial structure different from the first interfacial structure of the first interconnect structure.
    Type: Application
    Filed: May 9, 2008
    Publication date: November 12, 2009
    Inventors: Louis L. Hsu, William R. Tonti, Chih-Chao Yang
  • Publication number: 20090278228
    Abstract: A design structure is provided for interconnect structures containing various capping materials for electrical fuses and other related applications. The structure includes a first interconnect structure having a first interfacial structure and a second interconnect structure adjacent to the first structure. The second interconnect structure has second interfacial structure different from the first interfacial structure.
    Type: Application
    Filed: May 9, 2008
    Publication date: November 12, 2009
    Inventors: Louis L. Hsu, William R. Tonti, Chih-Chao Yang
  • Publication number: 20090273988
    Abstract: According to the present invention, a circuit and methods for enhancing the operation of SOI fabricated devices are disclosed. In a preferred embodiment of the present invention, a pulse discharge circuit is provided. Here, a circuit is designed to provide a pulse that will discharge the accumulated electrical charge on the body of the SOI devices in the memory subarray just prior to the first access cycle. As explained above, once the accumulated charge has been dissipated, the speed penalty for successive accesses to the memory subarray is eliminated or greatly reduced. With a proper control signal, timing and sizing, this can be a very effective method to solve the problem associated with the SOI loading effect. Alternatively, instead of connecting the bodies of all SOI devices in a memory circuit to ground, the bodies of the N-channel FET pull-down devices of the local word line drivers can be selectively connected to a reference ground.
    Type: Application
    Filed: July 28, 2008
    Publication date: November 5, 2009
    Applicant: International Business Machines Corporation
    Inventors: Roy Childs Flaker (deceased), Catherine O'Brien, Scott Flaker, Shirley A. Flaker, Bruce Flaker, Anne Flaker, Heather Flaker, Louis L. Hsu, Jente B. Kuang
  • Patent number: 7605072
    Abstract: An interconnect structure that includes a barrier-redundancy feature which is capable of avoiding a sudden open circuit after an electromigration (EM) failure as well as a method of forming the same are provided. In accordance with the present invention, the barrier-redundancy feature is located within preselected locations within the interconnect structure including in a wide line region, a thin line region or any combination thereof. The barrier-redundancy feature includes an electrical conductive material located between, and in contact with, a conductive line diffusion barrier of a conductive line and a via diffusion barrier of an overlying via. The presence of the inventive barrier-redundancy feature creates an electrical path between the via diffusion barrier along the sidewalls of the via and the conductive line diffusion barrier along the sidewalls of the conductive line.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: October 20, 2009
    Assignee: International Business Machines Corporation
    Inventors: Chih-Chao Yang, Louis L. Hsu
  • Publication number: 20090231025
    Abstract: A circuit and a method for extending the lifetime of a semiconductor chip. The circuit including a voltage reference generator, a voltage switch, a threshold voltage regulator device and a threshold voltage monitor device tunes an automatic internal power supply. The voltage reference generator provides one or more reference voltage levels that are transmitted to the voltage switch. The threshold voltage monitor device monitors the threshold voltage of the device, triggering the voltage switch to select a reference level for use as a voltage reference for the regulator when the threshold voltage of the monitored device exceeds a predetermined value. The regulator then converts the external power supply to an internal supply and holds it at the predetermined reference level.
    Type: Application
    Filed: March 11, 2008
    Publication date: September 17, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ping-Chuan Wang, Jong-ru Guo, Louis L. Hsu, Zhijian Yang
  • Publication number: 20090217961
    Abstract: Semiconductor integrated thermoelectric devices are provided, which are formed having high-density arrays of thermoelectric (TE) elements using semiconductor thin-film and VLSI (very large scale integration) fabrication processes. Thermoelectric devices can be either separately formed and bonded to semiconductor chips, or integrally formed within the non-active surface of semiconductor chips, for example.
    Type: Application
    Filed: May 13, 2009
    Publication date: September 3, 2009
    Applicant: International Business Machines Corporation
    Inventors: Howard Hao Chen, Richard C. Chu, Louis L. Hsu
  • Publication number: 20090212341
    Abstract: An epitaxial semiconductor layer or a stack of a silicon germanium alloy layer and an epitaxial strained silicon layer is formed on outer sidewalls of a porous silicon portion on a substrate. The porous silicon portion and any silicon germanium alloy material are removed and a semitubular epitaxial semiconductor structure in a three-walled configuration is formed. A semitubular field effect transistor comprising inner and outer gate dielectric layers, an inner gate electrode, an outer gate electrode, and source and drain regions is formed on the semitubular epitaxial semiconductor structure. The semitubular field effect transistor may operate as an SOI transistor with a tighter channel control through the inner and outer gate electrodes, or as a memory device storing electrical charges in the body region within the semitubular epitaxial semiconductor structure.
    Type: Application
    Filed: February 21, 2008
    Publication date: August 27, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kangguo Cheng, Lawrence A. Clevenger, Timothy J. Dalton, Louis L. Hsu, Jack A. Mandelman
  • Patent number: 7572682
    Abstract: A fuse/anti-fuse structure is provided in which programming of the anti-fuse is caused by an electromigation induced hillock that is formed adjacent to the fuse element. The hillock ruptures a thin diffusion barrier located on the sidewalls of the fuse element and the conductive material within the fuse element diffuses into the adjacent dielectric material. The fuse element includes a conductive material located within a line opening which includes a first diffusion barrier having a first thickness located on sidewalls and a bottom wall of the line opening. The anti-fuse element includes the conductive material located within a combined via and line opening which includes the first diffusion barrier located on sidewalls and a bottom wall of the combined via and line opening and a second diffusion barrier having a second thickness that is greater than the first thickness located on the first diffusion barrier.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: August 11, 2009
    Assignee: International Business Machines Corporation
    Inventors: Chih-Chao Yang, Daniel C. Edelstein, Jack A. Mandelman, Louis L. Hsu
  • Publication number: 20090146692
    Abstract: A design structure for a signal-handing apparatus or communication apparatus is provided which includes a common signal node operable to conduct a first signal, a first circuit coupled to the common signal node to utilize the first signal and a signal-handling element coupled to the common signal node. A signal-handling apparatus may include an isolating circuit coupled to a first conductor, a second conductor to conduct an output of the isolating circuit, and a signal-handling circuit coupled to the second conductor. A signal-handling circuit can perform a signal-handling function in response to the output of the isolating circuit. The signal-handling circuit and the first circuit may be isolated from the second conductor and the signal-handling circuit such that a communication signal may be conducted with less capacitance and be subject to less return loss.
    Type: Application
    Filed: December 6, 2007
    Publication date: June 11, 2009
    Inventors: Louis L. Hsu, Karl D. Selander, Michael A. Sorna, Daniel W. Storaska
  • Patent number: 7544883
    Abstract: Semiconductor integrated thermoelectric devices are provided, which are formed having high-density arrays of thermoelectric (TE) elements using semiconductor thin-film and VLSI (very large scale integration) fabrication processes. Thermoelectric devices can be either separately formed and bonded to semiconductor chips, or integrally formed within the non-active surface of semiconductor chips, for example.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: June 9, 2009
    Assignee: International Business Machines Corporation
    Inventors: Howard Hao Chen, Richard C. Chu, Louis L. Hsu
  • Publication number: 20090132985
    Abstract: A design structure embodied in a machine readable medium used in a design process can include apparatus of a semiconductor chip operable to detect an increase in resistance of a monitored element of the semiconductor chip. The design structure can include, for example, a resistive voltage divider circuit operable to output a plurality of reference voltages having different values. A plurality of comparators in the semiconductor chip may be coupled to receive the reference voltages and a monitored voltage representative of a resistance of the monitored element. Each of the comparators may produce an output indicating whether the monitored voltage exceeds the reference voltages, so that the resistance value of the monitored element may be precisely determined.
    Type: Application
    Filed: November 19, 2007
    Publication date: May 21, 2009
    Inventors: Louis L. Hsu, Hayden C. Cranford, JR., Oleg Gluschenkov, James S. Mason, Michael A. Sorna, Chih-Chao Yang
  • Publication number: 20090129485
    Abstract: A design structure embodied in a machine-readable medium used in a design process provides a transmitter having a frequency response controllable in accordance with an operational parameter, and may include a storage operable to store operational parameters for controlling a frequency response of the transmitter under each of a plurality of corresponding operating conditions. A sensor can be used to detect an operating condition. In response to a change in the detected operating condition, a stored operational parameter corresponding to the detected operating condition can be used to control the frequency response of the transmitter.
    Type: Application
    Filed: November 19, 2007
    Publication date: May 21, 2009
    Inventors: Louis L. Hsu, Hayden C. Cranford, JR., Joseph Natonio, James D. Rockrohr, Huihao Xu, Steven J. Zier
  • Publication number: 20090128161
    Abstract: A design structure embodied in a machine-readable medium used in a design process may include a system for detecting a fault in a signal transmission path. Such system may include, for example, a hysteresis comparator including a latch having n-type field effect transistor (“NFET”) storage elements. The hysteresis comparator may be operable to detect a crossing of a reference voltage level by an input signal arriving from the signal transmission path such that when the comparator does not detect an expected crossing of the reference voltage level by the input signal, the fault is determined to be detected in the signal transmission path.
    Type: Application
    Filed: November 19, 2007
    Publication date: May 21, 2009
    Inventors: Huihao Xu, Louis L. Hsu, Kevin G. Kramer, James D. Rockrohr, Michael A. Sorna
  • Publication number: 20090117360
    Abstract: A non-photosensitive polymeric resist containing at least two immiscible polymeric block components is deposited on the planar surface. The non-photosensitive polymeric resist is annealed to allow phase separation of immiscible components and developed to remove at least one of the at least two polymeric block components. Nanoscale features, i.e., features of nanometer scale, including at least one recessed region having a nanoscale dimension is formed in the polymeric resist. The top surface of the polymeric resist is modified for enhanced etch resistance by an exposure to an energetic beam, which allows the top surface of the patterned polymeric resist to become more resistant to etching processes and chemistries. The enhanced ratio of etch resistance between the two types of surfaces provides improved image contrast and fidelity between areas having the top surface and the at least one recessed region.
    Type: Application
    Filed: November 1, 2007
    Publication date: May 7, 2009
    Applicant: International Business Machines Corporation
    Inventors: Lawrence A. Clevenger, Timothy J. Dalton, Habib Hichri, Louis L. Hsu, Kaushik A. Kumar, Carl Radens, Shahab Siddiqui, Chih-Chao Yang
  • Patent number: 7528483
    Abstract: A cooling system for a semiconductor substrate includes a plurality of trenches formed from a backside of the semiconductor substrate, and thermally conductive material deposited in the plurality of trenches. A method of forming cooling elements in a semiconductor substrate, includes coating a backside of the semiconductor substrate with a first mask layer, forming a plurality of trench patterns in the first mask layer, etching the semiconductor substrate to form a plurality of trenches along the plurality of trench patterns, and depositing thermally conductive material in the plurality of trenches. Trenches constructed from the backside of a wafer improve efficiency of heat transfer from a front-side to the backside of an integrated-circuit chip. The fabrication of trenches from the backside of the wafer allows for increases in the depth and number of trenches, and provides a means to attach passive and active cooling devices directly to the backside of a wafer.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: May 5, 2009
    Assignee: International Business Machines Corporation
    Inventors: Howard Hao Chen, Louis L. Hsu, Joseph F. Shepard, Jr.
  • Publication number: 20090111257
    Abstract: Anti-reverse engineering techniques are provided. In one aspect, a method for forming at least one feature in an insulating layer is provided. The method comprises the following steps. Ions are selectively implanted in the insulating layer so as to form at least one implant region within the insulating layer, the implanted ions being configured to alter an etch rate through the insulating layer within the implant region. The insulating layer is etched to, at the same time, form at least one void both within the implant region and outside of the implant region, wherein the etch rate through the insulating layer within the implant region is different from an etch rate through the insulating layer outside of the implant region. The void is filled with at least one conductor material to form the feature in the insulating layer.
    Type: Application
    Filed: October 26, 2007
    Publication date: April 30, 2009
    Applicant: International Business Machines Corporation
    Inventors: Louis L. Hsu, Rajiv V. Joshi, David W. Kruger
  • Patent number: 7519130
    Abstract: A data receiver is provided which includes a front end interface circuit having an alternating current (AC) transmission receiving mode and a direct current (DC) transmission receiving mode. The front end interface circuit includes an offset compensation circuit operable to compensate a DC voltage offset between a pair of differential signals input to the data receiver. The front end interface circuit further includes an AC/DC selection unit operable to switch between (a) the DC transmission receiving mode, and (b) the AC transmission receiving mode, such that the data receiver is operable in (i) the DC transmission mode in which the offset compensation circuit is disabled, (ii) the DC transmission mode in which the offset compensation circuit is enabled, (iii) the AC transmission mode in which the offset compensation circuit is disabled, and (iv) the AC transmission receiving mode in which the offset compensation circuit is enabled.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: April 14, 2009
    Assignee: International Business Machines Corporation
    Inventors: Louis L. Hsu, Matt R. Cordrey-Gale, James S. Mason, Philip J. Murfet, Karl D. Selander, Michael A. Sorna, Huihao Xu
  • Patent number: 7499308
    Abstract: Aspects of the invention relate to a programmable heavy-ion sensing device for accelerated DRAM soft error detection. Design of a DRAM-based alpha particle sensing apparatus is preferred to be used as an accelerated on-chip SER test vehicle. The sensing apparatus is provided with programmable sensing margin, refresh rate, and supply voltage to achieve various degree of SER sensitivity. In addition, a dual-mode DRAM array is proposed so that at least a portion of the array can be used to monitor high-energy particle activities during soft-error detection (SED) mode.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: March 3, 2009
    Assignee: International Business Machines Corporation
    Inventors: Howard H. Chen, John A. Fifield, Louis L. Hsu, Henry H. K. Tang
  • Publication number: 20090020891
    Abstract: Methods for manufacturing an integrated wafer scale package that reduces a potential misalignment between a chip and a pocket of a carrier substrate. According to one aspect of the present invention, a method for manufacturing a semiconductor device includes a photoresist layer disposed on a carrier substrate, a chip placed onto a surface of the photoresist layer. The photoresist layer is patterned using the chip as a mask. The chip is removed from the photoresist layer after the patterning step. A pocket is formed in the carrier substrate, and the chip that was removed is placed into the pocket formed in the carrier substrate.
    Type: Application
    Filed: October 2, 2008
    Publication date: January 22, 2009
    Inventors: Howard Hao Chen, Louis L. Hsu