Patents by Inventor Louis C. Hsu
Louis C. 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).
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Patent number: 9058887Abstract: The present invention provides a reprogrammable electrically blowable fuse and associated design structure. The electrically blowable fuse is programmed using an electro-migration effect and is reprogrammed using a reverse electro-migration effect. The state (i.e., “opened” or “closed”) of the electrically blowable fuse is determined by a sensing system which compares a resistance of the electrically blowable fuse to a reference resistance.Type: GrantFiled: October 30, 2007Date of Patent: June 16, 2015Assignee: International Business Machines CorporationInventors: Louis C. Hsu, Conal E. Murray, Chandrasekhar Narayan, Chih-Chao Yang
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Patent number: 8772941Abstract: A method for manufacturing a circuit includes the step of providing a first wiring level comprising first wiring level conductors separated by a first wiring level dielectric material. A first dielectric layer with a plurality of interconnect openings and a plurality of gap openings is formed above the first wiring level. The interconnect openings and the gap openings are pinched off with a pinching dielectric material to form relatively low dielectric constant (low-k) volumes in the gap openings. Metallic conductors comprising second wiring level conductors and interconnects to the first wiring level conductors are formed at the interconnect openings while maintaining the relatively low-k volumes in the gap openings. The gap openings with the relatively low-k volumes reduce parasitic capacitance between adjacent conductor structures formed by the conductors and interconnects.Type: GrantFiled: September 8, 2008Date of Patent: July 8, 2014Assignee: International Business Machines CorporationInventors: Lawrence A. Clevenger, Matthew E. Colburn, Louis C. Hsu, Wai-Kin Li
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Patent number: 8759175Abstract: A flash memory structure having an enhanced capacitive coupling coefficient ratio (CCCR) may be fabricated in a self-aligned manner while using a semiconductor substrate that has an active region that is recessed within an aperture with respect to an isolation region that surrounds the active region. The flash memory structure includes a floating gate that does not rise above the isolation region, and that preferably consists of a single layer that has a U shape. The U shape facilitates the enhanced capacitive coupling coefficient ratio.Type: GrantFiled: March 26, 2012Date of Patent: June 24, 2014Assignee: International Business Machines CorporationInventors: Louis C. Hsu, Xu Ouyang, Ping-Chuan Wang, Zhijian J. Yang
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Patent number: 8598641Abstract: A semiconductor device and a method of fabricating a semiconductor device, wherein the method includes forming, on a substrate, a plurality of planarized fin bodies to be used for customized fin field effect transistor (FinFET) device formation; forming a nitride spacer around each of the plurality of fin bodies; forming an isolation region in between each of the fin bodies; and coating the plurality of fin bodies, the nitride spacers, and the isolation regions with a protective film. The fabricated semiconductor device is adapted to be used in customized applications as a customized semiconductor device.Type: GrantFiled: November 2, 2011Date of Patent: December 3, 2013Assignee: International Business Machines CorporationInventors: Howard H. Chen, Louis C. Hsu, Jack A. Mandelman, Chun-Yung Sung
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Patent number: 8471296Abstract: A method forms an eFuse structure that has a pair of adjacent semiconducting fins projecting from the planar surface of a substrate (in a direction perpendicular to the planar surface). The fins have planar sidewalls (perpendicular to the planar surface of the substrate) and planar tops (parallel to the planar surface of the substrate). The tops are positioned at distal ends of the fins relative to the substrate. An insulating layer covers the tops and the sidewalls of the fins and covers an intervening substrate portion of the planar surface of the substrate located between the fins. A metal layer covers the insulating layer. A pair of conductive contacts are connected to the metal layer at locations where the metal layer is adjacent the top of the fins.Type: GrantFiled: January 21, 2011Date of Patent: June 25, 2013Assignee: International Business Machines CorporationInventors: Kangguo Cheng, Louis C. Hsu, William R. Tonti, Chih-Chao Yang
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Patent number: 8339893Abstract: A static random access memory (SRAM) cell includes a first read port, the first read port having a first beta ratio; and a write port, the write port having a second beta ratio that is substantially lower than the first beta ratio. A static random access memory (SRAM) array includes a plurality of SRAM cells, an SRAM cell including a first read port, the first read port having a first beta ratio; and a write port, the write port having a second beta ratio that is substantially lower than the first beta ratio.Type: GrantFiled: September 25, 2009Date of Patent: December 25, 2012Assignee: International Business Machines CorporationInventors: Yuen H. Chan, Louis C. Hsu, Xu Ouyang, Robert C. Wong
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Patent number: 8304912Abstract: A transistor device and method of forming the same comprises a substrate; a first gate electrode over the substrate; a second gate electrode over the substrate; and a landing pad comprising a pair of flanged ends overlapping the second gate electrode, wherein the structure of the second gate electrode is discontinuous with the structure of the landing pad.Type: GrantFiled: March 25, 2008Date of Patent: November 6, 2012Assignee: International Business Machines CorporationInventors: Lawrence A. Clevenger, Timothy J. Dalton, Louis C. Hsu, Carl Radens, Kwong Hon Wong, Chih-Chao Yang
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Publication number: 20120187528Abstract: A method forms an eFuse structure that has a pair of adjacent semiconducting fins projecting from the planar surface of a substrate (in a direction perpendicular to the planar surface). The fins have planar sidewalls (perpendicular to the planar surface of the substrate) and planar tops (parallel to the planar surface of the substrate). The tops are positioned at distal ends of the fins relative to the substrate. An insulating layer covers the tops and the sidewalls of the fins and covers an intervening substrate portion of the planar surface of the substrate located between the fins. A metal layer covers the insulating layer. A pair of conductive contacts are connected to the metal layer at locations where the metal layer is adjacent the top of the fins.Type: ApplicationFiled: January 21, 2011Publication date: July 26, 2012Applicant: International Business Machines CorporationInventors: Kangguo Cheng, Louis C. Hsu, William R. Tonti, Chih-Chao Yang
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Publication number: 20120184076Abstract: A flash memory structure having an enhanced capacitive coupling coefficient ratio (CCCR) may be fabricated in a self-aligned manner while using a semiconductor substrate that has an active region that is recessed within an aperture with respect to an isolation region that surrounds the active region. The flash memory structure includes a floating gate that does not rise above the isolation region, and that preferably consists of a single layer that has a U shape. The U shape facilitates the enhanced capacitive coupling coefficient ratio.Type: ApplicationFiled: March 26, 2012Publication date: July 19, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Louis C. Hsu, Xu Ouyang, Ping-Chuan Wang, Zhijian J. Yang
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Patent number: 8193575Abstract: A flash memory structure having an enhanced capacitive coupling coefficient ratio (CCCR) may be fabricated in a self-aligned manner while using a semiconductor substrate that has an active region that is recessed within an aperture with respect to an isolation region that surrounds the active region. The flash memory structure includes a floating gate that does not rise above the isolation region, and that preferably consists of a single layer that has a U shape. The U shape facilitates the enhanced capacitive coupling coefficient ratio.Type: GrantFiled: February 7, 2008Date of Patent: June 5, 2012Assignee: International Business Machines CorporationInventors: Louis C. Hsu, Xu Ouyang, Ping-Chuan Wang, Zhijian J. Yang
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Patent number: 8189419Abstract: Electronic fuse (e-fuse) systems with multiple reprogrammability are provided. In one aspect, a reprogrammable e-fuse system is provided that includes a first e-fuse string; a second e-fuse string; a selector connected to both the first e-fuse string and the second e-fuse string configured to alternately select an e-fuse from the first e-fuse string or the second e-fuse string to be programmed; and a comparator connected to both the first e-fuse string and the second e-fuse string configured to compare a voltage across the first e-fuse string to a voltage across the second e-fuse string to determine a programming state of the e-fuse system.Type: GrantFiled: July 6, 2009Date of Patent: May 29, 2012Assignee: International Business Machines CorporationInventors: Howard H. Chen, John A. Fifield, Louis C. Hsu
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Patent number: 8169077Abstract: Dielectric interconnect structures and methods for forming the same are provided. Specifically, the present invention provides a dielectric interconnect structure having a noble metal layer (e.g., Ru, Ir, Rh, Pt, RuTa, and alloys of Ru, Ir, Rh, Pt, and RuTa) that is formed directly on a modified dielectric surface. In a typical embodiment, the modified dielectric surface is created by treating an exposed dielectric layer of the interconnect structure with a gaseous ion plasma (e.g., Ar, He, Ne, Xe, N2, H2, NH3, and N2H2). Under the present invention, the noble metal layer could be formed directly on an optional glue layer that is maintained only on vertical surfaces of any trench or via formed in the exposed dielectric layer. In addition, the noble metal layer may or may not be provided along an interface between the via and an internal metal layer.Type: GrantFiled: August 4, 2008Date of Patent: May 1, 2012Assignee: International Business Machines CorporationInventors: Chih-Chao Yang, Louis C. Hsu, Rajiv V. Joshi
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Patent number: 8159042Abstract: An anti-fuse structure that included a buried electrically conductive, e.g., metallic layer as an anti-fuse material as well as a method of forming such an anti-fuse structure are provided. According to the present invention, the inventive anti-fuse structure comprises regions of leaky dielectric between interconnects. The resistance between these original interconnects starts decreasing when two adjacent interconnects are biased and causes a time-dependent dielectric breakdown, TDDB, phenomenon to occur. Decreasing of the resistance between adjacent interconnects can also be expedited via increasing the local temperature.Type: GrantFiled: June 23, 2008Date of Patent: April 17, 2012Assignee: International Business Machines CorporationInventors: Chih-Chao Yang, Lawrence A. Clevenger, Timothy J. Dalton, Nicholas C. Fuller, Louis C. Hsu
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Patent number: 8138085Abstract: A laser annealing method for annealing a stacked semiconductor structure having at least two stacked layers is disclosed. A laser beam is focused on a lower layer of the stacked layers. The laser beam is then scanned to anneal features in the lower layer. The laser beam is then focused on an upper layer of the stacked layers, and the laser beam is scanned to anneal features in the upper layer. The laser has a wavelength of less than one micrometer. The beam size, depth of focus, energy dosage, and scan speed of the laser beam are programmable. Features in the lower layer are offset from features in the upper layer such that these features do not overlap along a plane parallel to a path of the laser beam. Each of the stacked layers includes active devices, such as transistors. Also, the first and second layers may be annealed simultaneously.Type: GrantFiled: April 25, 2011Date of Patent: March 20, 2012Assignee: International Business Machines CorporationInventors: Howard H. Chen, Louis C. Hsu, Lawrence S. Mok, J. Campbell Scott
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Publication number: 20120043597Abstract: A semiconductor device and a method of fabricating a semiconductor device, wherein the method comprises forming, on a substrate, a plurality of planarized fin bodies to be used for customized fin field effect transistor (FinFET) device formation; forming a nitride spacer around each of the plurality of fin bodies; forming an isolation region in between each of the fin bodies; and coating the plurality of fin bodies, the nitride spacers, and the isolation regions with a protective film. The fabricated semiconductor device is used in customized applications as a customized semiconductor device.Type: ApplicationFiled: November 2, 2011Publication date: February 23, 2012Applicant: International Business Machines CorporationInventors: Howard H. Chen, Louis C. Hsu, Jack A. Mandelman, Chun-Yung Sung
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Patent number: 8105936Abstract: Solutions for forming dielectric interconnect structures are provided. Specifically, the present invention provides methods of forming a dielectric interconnect structure having a noble metal layer that is formed directly on a modified dielectric surface. In a typical embodiment, the modified dielectric surface is created by treating an exposed dielectric layer of the interconnect structure with a gaseous ion plasma. Under the present invention, the noble metal layer could be formed directly on an optional glue layer that is maintained only on vertical surfaces of any trench or via formed in the exposed dielectric layer. In addition, the noble metal layer may be provided along an interface between the via and an internal metal layer.Type: GrantFiled: July 16, 2008Date of Patent: January 31, 2012Assignee: International Business Machines CorporationInventors: Chih-Chao Yang, Louis C. Hsu, Rajiv V. Joshi
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Patent number: 8093657Abstract: 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: GrantFiled: July 28, 2008Date of Patent: January 10, 2012Assignee: International Business Machines CorporationInventors: Roy Childs Flaker, Catherine O'Brien, legal representative, Scott Flaker, legal representative, Shirley A. Flaker, legal representative, Bruce Flaker, legal representative, Anne Flaker, legal representative, Heather Flaker, legal representative, Louis C. Hsu, Jente Kuang
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Patent number: 8076190Abstract: A semiconductor device and a method of fabricating a semiconductor device is disclosed, the method comprises including: forming etching an oxide layer to form a pattern of parallel oxide bars on a substrate; forming nitride spacers on side walls of the parallel oxide bars, with gaps remaining between adjacent nitride spacers; forming silicon pillars in the gaps; removing the nitride spacers to form a plurality of fin bodies; forming an isolation region in between each of the fin bodies; and coating the plurality of fin bodies, the nitride spacers, and the isolation regions with a protective film.Type: GrantFiled: August 4, 2009Date of Patent: December 13, 2011Assignee: International Business Machines CorporationInventors: Howard H. Chen, Louis C. Hsu, Jack A. Mandelman, Chun-Yung Sung
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Patent number: 8027416Abstract: A machine-readable medium thereupon stored a design structure; the design structure includes a receiver for a data communications system. The receiver includes a data path for receiving a data signal from a data channel, the data path comprising an automatic gain control (AGC) loop; and, a signal detector for generating a data valid signal indicative of the validity of the data signal in response to detection of the data signal on the channel exceeding a threshold and in dependence upon gain information from the AGC loop in the data path.Type: GrantFiled: March 6, 2008Date of Patent: September 27, 2011Assignee: International Business Machines CorporationInventors: James S. Mason, Louis C. Hsu, Phil J. Murfet, Gareth J. Nicholls
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Patent number: 8027415Abstract: A receiver for a data communications system comprises: a data path for receiving a data signal from a data channel, the data path comprising an automatic gain control (AGC) loop; and, a signal detector for generating a data valid signal indicative of the validity of the data signal in response to detection of the data signal on the channel exceeding a threshold and in dependence upon gain information from the AGC loop in the data path.Type: GrantFiled: April 19, 2007Date of Patent: September 27, 2011Assignee: International Business Machines CorporationInventors: James S. Mason, Louis C. Hsu, Phil J. Murfet, Gareth J. Nicholls