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).

  • Patent number: 7893529
    Abstract: The invention comprises a 3D chip stack with an intervening thermoelectric coupling (TEC) plate. Through silicon vias in the 3D chip stack transfer electronic signals among the chips in the 3D stack, power the TEC plate, as well as distribute heat in the stack from hotter chips to cooler chips.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: February 22, 2011
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Ping-Chuan Wang, Xiaojin Wei, Huilong Zhu
  • Publication number: 20110034021
    Abstract: Through silicon vias (TSVs) in silicon chips are both programmable and non-programmable. The programmable TSVs may employ metal/insulator/metal structures to switch from an open to shorted condition with programming carried out by complementary circuitry on two adjacent chips in a multi-story chip stack.
    Type: Application
    Filed: September 20, 2010
    Publication date: February 10, 2011
    Applicant: International Business Machines Corporation
    Inventors: Kai Di Feng, Louis Lu-Chen Hsu, Ping-Chuan Wang, Zhijian Yang
  • Patent number: 7875960
    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: July 30, 2008
    Date of Patent: January 25, 2011
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti
  • Patent number: 7863960
    Abstract: A central reference clock is placed in a substantially middle chip of a 3-D chip-stack. The central reference clock is distributed to each child chip of the 3-D chip-stack, so that a plurality of clocks is generated for each individual chip in the 3-D-stack in a synchronous manner. A predetermined number of through-silicon-vias and on-chip wires are employed to form a delay element for each slave clock, ensuring that the clock generated for each child chip is substantially synchronized. Optionally, an on-chip clock trimming circuit is embedded for further precision tuning to eliminate local clock skews.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: January 4, 2011
    Assignee: International Business Machines Corporation
    Inventors: Ping-Chuan Wang, Anthony R. Bonaccio, Jong-Ru Guo, Louis Lu-Chen Hsu
  • Publication number: 20100327958
    Abstract: A dormant mode target semiconductor device within a leakage current target unit is identified for mitigating leakage current to prevent it from reaching catastrophic runaway. A leakage current shift monitor unit is electrically connected to the output node of the leakage current target unit and collects leakage current from the selected target semiconductor device for two consecutive predefined temporal periods and measures the difference between the collected leakage currents. A comparator receives and compares the outputs of the current shift monitor unit and a reference voltage generator. The comparator propagates an alert signal to the leakage current target unit when the leakage voltage output from the leakage current shift monitor unit exceeds the reference voltage, a condition that indicates that the leakage current is about to approach catastrophic runaway levels.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: Jong-Ru Guo, Louis Lu-Chen Hsu, Rajiv Vasant Joshi, Ping-Chuan Wang, Zhijian Yang
  • Publication number: 20100320563
    Abstract: A structure. The structure includes: a substrate; a first electrode in the substrate; a dielectric layer on top of the substrate and the electrode; a second dielectric layer on the first dielectric layer, said second dielectric layer comprising a second dielectric material; a fuse element buried in the first dielectric layer, wherein the fuse element (i) physically separates, (ii) is in direct physical contact with both, and (iii) is sandwiched between a first region and a second region of the dielectric layer; and a second electrode on top of the fuse element, wherein the first electrode and the second electrode are electrically coupled to each other through the fuse element.
    Type: Application
    Filed: August 30, 2010
    Publication date: December 23, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti, Chih-Chao Yang
  • Publication number: 20100301475
    Abstract: Systems and methods are disclosed that enable forming semiconductor chip connections. In one embodiment, the semiconductor chip includes a body having a polyhedron shape with a pair of opposing sides; and a solder member extending along a side that extends between the pair of opposing sides of the polyhedron shape.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis Lu-Chen Hsu, Kangguo Cheng, Timothy J. Dalton, Mukta G. Farooq, John A. Fitzsimmons
  • Patent number: 7839163
    Abstract: Through silicon vias (TSVs) in silicon chips are both programmable and non-programmable. The programmable TSVs may employ metal/insulator/metal structures to switch from an open to shorted condition with programming carried out by complementary circuitry on two adjacent chips in a multi-story chip stack.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: November 23, 2010
    Assignee: International Business Machines Corporation
    Inventors: Kai Di Feng, Louis Lu-Chen Hsu, Ping-Chuan Wang, Zhijian Yang
  • Patent number: 7833873
    Abstract: A method (and system) of reducing contact resistance on a silicon-on-insulator device, including controlling a silicide depth in a source-drain region of the device.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: November 16, 2010
    Assignee: International Business Machines Corporation
    Inventors: Brian J. Greene, Louis Lu-Chen Hsu, Jack Allan Mandelman, Chun-Yung Sung
  • Publication number: 20100277210
    Abstract: a central reference clock is placed in a substantially middle chip of a 3-D chip-stack. The central reference clock is distributed to each child chip of the 3-D chip-stack, so that a plurality of clocks is generated for each individual chip in the 3-D-stack in a synchronous manner. A predetermined number of through-silicon-vias and on-chip wires are employed to form a delay element for each slave clock, ensuring that the clock generated for each child chip is substantially synchronized. Optionally, an on-chip clock trimming circuit is embedded for further precision tuning to eliminate local clock skews.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 4, 2010
    Applicant: International Business Machines Corporation
    Inventors: Ping-Chuan Wang, Anthony R. Bonaccio, Jong-Ru Guo, Louis Lu-Chen Hsu
  • Patent number: 7816945
    Abstract: Programmable fuse-type through silicon vias (TSVs) in silicon chips are provided with non-programmable TSVs in the same chip. The programmable fuse-type TSVs may employ a region within the TSV structure having sidewall spacers that restrict the cross-sectional conductive path of the TSV adjacent a chip surface contact pad. Application of sufficient current by programming circuitry causes electromigration of metal to create a void in the contact pad and, thus, an open circuit. Programming may be carried out by complementary circuitry on two adjacent chips in a multi-story chip stack.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: October 19, 2010
    Assignee: International Business Machines Corporation
    Inventors: Kai Di Feng, Louis Lu-Chen Hsu, Ping-Chuan Wang, Zhijian Yang
  • Publication number: 20100261318
    Abstract: Programmable fuse-type through silicon vias (TSVs) in silicon chips are provided with non-programmable TSVs in the same chip. The programmable fuse-type TSVs may employ a region within the TSV structure having sidewall spacers that restrict the cross-sectional conductive path of the TSV adjacent a chip surface contact pad. Application of sufficient current by programming circuitry causes electromigration of metal to create a void in the contact pad and, thus, an open circuit. Programming may be carried out by complementary circuitry on two adjacent chips in a multi-story chip stack.
    Type: Application
    Filed: June 24, 2010
    Publication date: October 14, 2010
    Applicant: International Business Machines Corporation
    Inventors: Kai Di Feng, Louis Lu-Chen Hsu, Ping-Chuan Wang, Zhijian Yang
  • Patent number: 7809340
    Abstract: An apparatus is provided for implementing an enhanced hand shake protocol for microelectronic communication systems. A transmitter and a receiver is coupled together by a transmission link. The transmitter receives an idle input. The idle input is activated when the transmitter is not transmitting data and the transmitter applies a first common 10 mode level to the receiving unit. The idle input is deactivated when the transmitter is ready to transmit data and the transmitter raises the common mode level to the receiving unit. Responsive to the receiver detecting the common mode level up-movement, then the receiver receives the transmitted data signals. After the desired data has been sent, the 15 transmitter terminates communications, drops the common mode level with the idle input being activated.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: October 5, 2010
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, James Stephen Mason
  • Patent number: 7803700
    Abstract: Methods of forming semiconductor structures characterized by a thin active silicon layer on an insulating substrate by a crystal imprinting or damascene approach. The methods include patterning an insulating layer to define a plurality of apertures, filling the apertures in the patterned insulating layer with amorphous silicon to define a plurality of amorphous silicon features, and re-growing the amorphous silicon features to define a thin active silicon layer consisting of regrown silicon features. The amorphous silicon features may be regrown such that a number have a first crystal orientation and another number have a different second crystal orientation.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: September 28, 2010
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William R. Tonti
  • Patent number: 7785934
    Abstract: A structure fabrication method. The method includes providing a structure. The structure includes (a) a substrate layer, (b) a first fuse electrode in the substrate layer, and (c) a fuse dielectric layer on the substrate layer and the first fuse electrode. The method further includes (i) forming an opening in the fuse dielectric layer such that the first fuse electrode is exposed to a surrounding ambient through the opening, (ii) forming a fuse region on side walls and bottom walls of the opening such that the fuse region is electrically coupled to the first fuse electrode, and (iii) after said forming the fuse region, filling the opening with a dielectric material.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: August 31, 2010
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Robert Tonti, Chih-Chao Yang
  • Patent number: 7768130
    Abstract: A method for fabricating and back-end-of-line (BEOL) metalization structures includes simultaneous high-k and low-k dielectric regions. An interconnect structure includes a first inter-level dielectric (ILD) layer and a second ILD layer with the first ILD layer underlying the second ILD layer. A plurality of columnar air gaps is formed in the first ILD. The columnar air gap structure is created using a two-phase photoresist material for providing different etching selectivity during subsequent processing.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: August 3, 2010
    Assignee: International Business Machines Corporation
    Inventors: Louis Lu-Chen Hsu, Jack Allan Mandelman, William Tonti, Chih-Chao Yang
  • Publication number: 20100182040
    Abstract: Through silicon vias (TSVs) in silicon chips are both programmable and non-programmable. The programmable TSVs may employ metal/insulator/metal structures to switch from an open to shorted condition with programming carried out by complementary circuitry on two adjacent chips in a multi-story chip stack.
    Type: Application
    Filed: January 22, 2009
    Publication date: July 22, 2010
    Applicant: International Business Machines Corporation
    Inventors: Kai Di Feng, Louis Lu-Chen Hsu, Ping-Chuan Wang, Zhijian Yang
  • Publication number: 20100182041
    Abstract: Programmable fuse-type through silicon vias (TSVs) in silicon chips are provided with non-programmable TSVs in the same chip. The programmable fuse-type TSVs may employ a region within the TSV structure having sidewall spacers that restrict the cross-sectional conductive path of the TSV adjacent a chip surface contact pad. Application of sufficient current by programming circuitry causes electromigration of metal to create a void in the contact pad and, thus, an open circuit. Programming may be carried out by complementary circuitry on two adjacent chips in a multi-story chip stack.
    Type: Application
    Filed: January 22, 2009
    Publication date: July 22, 2010
    Applicant: International Business Machines Corporation
    Inventors: Kai Di Feng, Louis Lu-Chen Hsu, Ping-Chuan Wang, Zhijian Yang
  • Publication number: 20100176506
    Abstract: The invention comprises a 3D chip stack with an intervening thermoelectric coupling (TEC) plate. Through silicon vias in the 3D chip stack transfer electronic signals among the chips in the 3D stack, power the TEC plate, as well as distribute heat in the stack from hotter chips to cooler chips.
    Type: Application
    Filed: January 12, 2009
    Publication date: July 15, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis Lu-Chen Hsu, Ping-Chuan Wang, Xiaojin Wei, Huilong Zhu
  • Patent number: 7737530
    Abstract: Semiconductor device structures for use with bipolar junction transistors and methods of fabricating such semiconductor device structures. The semiconductor device structure includes 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 includes 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: May 30, 2008
    Date of Patent: June 15, 2010
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Cheng, Louis Lu-Chen Hsu, Jack Allan Mandelman