Patents by Inventor Xi Wei

Xi Wei 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: 8869078
    Abstract: Roughly described, the invention includes layouts and masks for an integrated circuit, in which the diffusion shape for a transistor includes a transversely extending jog on one or both transversely opposite sides, the jog having inner and outer corners, at least one of which is located relative to the gate conductor longitudinally such that during lithographic printing of the diffusion shape onto the integrated circuit, the corner will round and extend at least partly into the channel region. The invention also includes aspects for a system and method for introducing such jogs, and for an integrated circuit device having a non-rectangular channel region, the channel region being wider where it meets the source region than at some other longitudinal position under the gate.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: October 21, 2014
    Assignee: Synopsys, Inc.
    Inventors: Victor Moroz, Munkang Choi, Xi-Wei Lin
  • Patent number: 8847324
    Abstract: Roughly described, an integrated circuit transistor structure has a body of semiconductor material, the body having two longitudinally spaced doped source/drain volumes with a channel between, a gate stack disposed outside the body and facing at least one of the surfaces of the body along the channel. The body contains an adjustment volume, longitudinally within the channel volume and spaced behind the first surface by a first distance and spaced longitudinally from both the source/drain volumes. The adjustment volume comprises an adjustment volume material having, at each longitudinal position, an electrical conductivity which differs from that of the adjacent body material at the same longitudinal position, at least while the transistor is in an off-state. In one embodiment the adjustment volume material is a dielectric. In another embodiment the adjustment volume material is an electrical conductor.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: September 30, 2014
    Assignee: Synopsys, Inc.
    Inventors: Munkang Choi, Victor Moroz, Xi-Wei Lin
  • Publication number: 20140223395
    Abstract: Roughly described, the invention includes layouts and masks for an integrated circuit, in which the diffusion shape for a transistor includes a transversely extending jog on one or both transversely opposite sides, the jog having inner and outer corners, at least one of which is located relative to the gate conductor longitudinally such that during lithographic printing of the diffusion shape onto the integrated circuit, the corner will round and extend at least partly into the channel region. The invention also includes aspects for a system and method for introducing such jogs, and for an integrated circuit device having a non-rectangular channel region, the channel region being wider where it meets the source region than at some other longitudinal position under the gate.
    Type: Application
    Filed: April 9, 2014
    Publication date: August 7, 2014
    Applicant: Synopsys, Inc.
    Inventors: Victor Moroz, Munkang Choi, Xi-Wei Lin
  • Publication number: 20140208280
    Abstract: Computer-implemented techniques for modeling the mechanical behavior of integrated circuits using layout-dependent material properties are disclosed. The back end of line wiring that connects an integrated circuit to a substrate undergoes stresses and strains due to many heating and cooling cycles during a chip's packaging and lifecycle. Depending on integrated circuit design style, there may be vastly different thermal profiles across the integrated circuit. The mechanical behavior caused by the thermal cycles of the wire, vias, and insulators comprising the BEOL materials is simulated. Extraction of the integrated circuit structural information, regarding the BEOL materials, yields anisotropic information. Layout-dependent material volume fractions are computed using integrated circuit structural information. Anisotropic mechanical properties are determined based on the structural information.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 24, 2014
    Applicant: SYNOPSYS, INC.
    Inventors: Xiaopeng Xu, Dasarapu Vinay Kumar, Xi-Wei Lin
  • Patent number: 8776005
    Abstract: Computer-implemented techniques for modeling the mechanical behavior of integrated circuits using layout-dependent material properties are disclosed. The back end of line wiring that connects an integrated circuit to a substrate undergoes stresses and strains due to many heating and cooling cycles during a chip's packaging and lifecycle. Depending on integrated circuit design style, there may be vastly different thermal profiles across the integrated circuit. The mechanical behavior caused by the thermal cycles of the wire, vias, and insulators comprising the BEOL materials is simulated. Extraction of the integrated circuit structural information, regarding the BEOL materials, yields anisotropic information. Layout-dependent material volume fractions are computed using integrated circuit structural information. Anisotropic mechanical properties are determined based on the structural information.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: July 8, 2014
    Assignee: Synopsys, Inc.
    Inventors: Xiaopeng Xu, Dasarapu Vinay Kumar, Xi-Wei Lin
  • Publication number: 20140167174
    Abstract: Roughly described, an integrated circuit transistor structure has a body of semiconductor material, the body having two longitudinally spaced doped source/drain volumes with a channel between, a gate stack disposed outside the body and facing at least one of the surfaces of the body along the channel. The body contains an adjustment volume, longitudinally within the channel volume and spaced behind the first surface by a first distance and spaced longitudinally from both the source/drain volumes. The adjustment volume comprises an adjustment volume material having, at each longitudinal position, an electrical conductivity which differs from that of the adjacent body material at the same longitudinal position, at least while the transistor is in an off-state. In one embodiment the adjustment volume material is a dielectric. In another embodiment the adjustment volume material is an electrical conductor.
    Type: Application
    Filed: December 17, 2012
    Publication date: June 19, 2014
    Inventors: Munkang Choi, Victor Moroz, Xi-Wei Lin
  • Patent number: 8701054
    Abstract: Roughly described, the invention includes layouts and masks for an integrated circuit, in which the diffusion shape for a transistor includes a transversely extending jog on one or both transversely opposite sides, the jog having inner and outer corners, at least one of which is located relative to the gate conductor longitudinally such that during lithographic printing of the diffusion shape onto the integrated circuit, the corner will round and extend at least partly into the channel region. The invention also includes aspects for a system and method for introducing such jogs, and for an integrated circuit device having a non-rectangular channel region, the channel region being wider where it meets the source region than at some other longitudinal position under the gate.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: April 15, 2014
    Assignee: Synopsys, Inc.
    Inventors: Victor Moroz, Munkang Choi, Xi-Wei Lin
  • Patent number: 8694942
    Abstract: A system and method are provided for laying out an integrated circuit design into a plurality of circuit layout cells having gaps therebetween, and inserting into each given one of at least a subset of the gaps, a corresponding filler cell selected from a predefined database in dependence upon a desired effect on a performance parameter of at least one circuit cell adjacent to the given gap. The circuit layout cells may be arranged in rows, and in some embodiments the selection of an appropriate filler cell for a given gap depends upon effects desired on a performance parameter of both circuit cells adjacent to the given gap. The predefined filler cells can include, for example, dummy diffusion regions, dummy poly lines, N-well boundary shifts and etch stop layer boundary shifts. In an embodiment, circuit layout cells can be moved in order to accommodate a selected filler cell.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: April 8, 2014
    Assignee: Synopsys, Inc.
    Inventors: Xi-Wei Lin, Jyh-Chwen Frank Lee, Dipankar Pramanik
  • Patent number: 8686512
    Abstract: Roughly described, transistor channel regions are elevated over the level of certain adjacent STI regions. Preferably the STI regions that are transversely adjacent to the diffusion regions are suppressed, as are STI regions that are longitudinally adjacent to N-channel diffusion regions. Preferably STI regions that are longitudinally adjacent to P-channel diffusions are not suppressed; preferably they have an elevation that is at least as high as that of the diffusion regions.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: April 1, 2014
    Assignee: Synopsys, Inc.
    Inventors: Victor Moroz, Dipankar Pramanik, Xi-Wei Lin
  • Publication number: 20140068215
    Abstract: A data storage system, and a method for accessing data in a data storage system, wherein the data storage system comprises at least a first volume and a second volume, and the first volume and the second volume remain consistent by a synchronous copy relationship, the method comprising: setting a virtual unique identifier of the second volume as a unique identifier of the first volume; creating a first path from a host to the first volume and a second path from the host to the second volume by using the unique identifier of the first volume; accessing data by using the first path from the host to the first volume; and setting the second path from the host to the second volume as unavailable.
    Type: Application
    Filed: August 21, 2013
    Publication date: March 6, 2014
    Applicant: International Business Machines
    Inventors: Ye Chen, Ruo Meng Hao, Shu Xi Wei
  • Publication number: 20140033683
    Abstract: A method includes determining whether a urea refill event is detected, and clearing a quality accumulator value and clearing a latching abort command. The method includes determining whether urea fluid quality check abort conditions are met, and clearing the urea quality accumulator, latching the abort command, and exiting the reductant fluid quality check. In response to the abort conditions not being met, incrementing the urea quality accumulator according to an amount of urea being injected, and comparing the accumulated urea quantity to a low test threshold. The method includes, in response to the accumulated urea quantity being greater than the low test threshold, comparing the accumulated urea quantity to a high test threshold, and in response to the urea quantity being greater than the high test threshold, determining whether the a NOx exceedance is observed and clearing a urea quality error in response to the NOx exceedance not being observed.
    Type: Application
    Filed: October 7, 2013
    Publication date: February 6, 2014
    Applicant: Cummins Emmision Solutions Inc.
    Inventors: Xi Wei, David Everard, Baohua Qi, Mickey R. McDaniel, Edmund P. Hodzen, Guoquiang Li
  • Publication number: 20140003133
    Abstract: Roughly described, the cell layout in an SRAM array is re-arranged such that the gate electrodes for transistors for which flexibility to use one channel length is desired, are formed along a different track from those for transistors for which flexibility to use a different channel length is desired. Not only does such a re-arrangement permit optimization of device ratios, but also in certain implementations can also reduce, rather than increase, cell area. Specific example layouts are described. The invention also involves layout files, macrocells, lithographic masks and integrated circuit devices incorporating these principles, as well as fabrication methods.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 2, 2014
    Applicant: Synopsys, Inc.
    Inventors: Xi-Wei Lin, Victor Moroz
  • Publication number: 20130332893
    Abstract: A system and method are provided for laying out an integrated circuit design into a plurality of circuit layout cells having gaps therebetween, and inserting into each given one of at least a subset of the gaps, a corresponding filler cell selected from a predefined database in dependence upon a desired effect on a performance parameter of at least one circuit cell adjacent to the given gap. The circuit layout cells may be arranged in rows, and in some embodiments the selection of an appropriate filler cell for a given gap depends upon effects desired on a performance parameter of both circuit cells adjacent to the given gap. The predefined filler cells can include, for example, dummy diffusion regions, dummy poly lines, N-well boundary shifts and etch stop layer boundary shifts. In an embodiment, circuit layout cells can be moved in order to accommodate a selected filler cell.
    Type: Application
    Filed: July 8, 2013
    Publication date: December 12, 2013
    Inventors: Xi-Wei Lin, Jyh-Chwen Frank Lee, Dipankar Pramanik
  • Patent number: 8567192
    Abstract: A system is provided for controlling an air handling system for an internal combustion engine. A dual-stage turbocharger includes a high-pressure compressor and variable geometry turbine combination fluidly coupled to a low-pressure compressor and variable geometry turbine combination. A control circuit includes a memory having instructions stored therein that are executable by the control circuit to determine a target low-pressure compressor ratio, a target high-pressure compressor ratio, a target high-pressure compressor inlet temperature and a target high-pressure compressor inlet pressure as a function of a target outlet pressure of the high-pressure compressor and a temperature, a pressure and a target flow rate of air entering the air inlet of the low-pressure compressor, and to control the geometries of the low-pressure and high-pressure turbines as a function of the target low-pressure compressor ratio the target high-pressure compressor ratio respectively.
    Type: Grant
    Filed: September 25, 2011
    Date of Patent: October 29, 2013
    Assignee: Cummins, Inc.
    Inventors: John N. Chi, John M. Mulloy, Sriram S. Popuri, Timothy R. Frazier, Martin T. Books, Divakar Rajamohan, Indranil Brahma, Xi Wei
  • Patent number: 8504969
    Abstract: A system and method are provided for laying out an integrated circuit design into a plurality of circuit layout cells having gaps therebetween, and inserting into each given one of at least a subset of the gaps, a corresponding filler cell selected from a predefined database in dependence upon a desired effect on a performance parameter of at least one circuit cell adjacent to the given gap. The circuit layout cells may be arranged in rows, and in some embodiments the selection of an appropriate filler cell for a given gap depends upon effects desired on a performance parameter of both circuit cells adjacent to the given gap. The predefined filler cells can include, for example, dummy diffusion regions, dummy poly lines, N-well boundary shifts and etch stop layer boundary shifts. In an embodiment, circuit layout cells can be moved in order to accommodate a selected filler cell.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: August 6, 2013
    Assignee: Synopsys, Inc.
    Inventors: Xi-Wei Lin, Jyh-Chwen Frank Lee, Dipankar Pramanik
  • Publication number: 20130074492
    Abstract: A system is provided for controlling an air handling system for an internal combustion engine. A dual-stage turbocharger includes a high-pressure compressor and variable geometry turbine combination fluidly coupled to a low-pressure compressor and variable geometry turbine combination. A control circuit includes a memory having instructions stored therein that are executable by the control circuit to determine a target low-pressure compressor ratio, a target high-pressure compressor ratio, a target high-pressure compressor inlet temperature and a target high-pressure compressor inlet pressure as a function of a target outlet pressure of the high-pressure compressor and a temperature, a pressure and a target flow rate of air entering the air inlet of the low-pressure compressor, and to control the geometries of the low-pressure and high-pressure turbines as a function of the target low-pressure compressor ratio the target high-pressure compressor ratio respectively.
    Type: Application
    Filed: September 25, 2011
    Publication date: March 28, 2013
    Inventors: John N. Chi, John M. Mulloy, Sriram S. Popuri, Timothy R. Frazier, Martin T. Books, Divakar Rajamohan, Indranil Brahma, Xi Wei
  • Publication number: 20120280354
    Abstract: An integrated circuit device having a plurality of lines is described in which the widths of the lines, and the spacing between adjacent lines, vary within a small range which is independent of variations due to photolithographic processes, or other patterning processes, involved in manufacturing the device. A sequential sidewall spacer formation process is described for forming an etch mask for the lines, which results in first and second sets of sidewall spacers arranged in an alternating fashion. As a result of this sequential sidewall spacer process, the variation in the widths of the lines across the plurality of lines, and the spacing between adjacent lines, depends on the variations in the dimensions of the sidewall spacers. These variations are independent of, and can be controlled over a distribution much less than, the variation in the size of the intermediate mask element caused by the patterning process.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 8, 2012
    Applicant: SYNOPSYS, INC.
    Inventors: VICTOR MOROZ, XI-WEI LIN
  • Publication number: 20120232731
    Abstract: A method includes interpreting a powertrain load variation amplitude and an internal combustion engine output profile. The method further includes determining an engine output differential in response to the powertrain load variation amplitude and the internal combustion engine output profile. The method further includes providing an energy accumulator sizing parameter and/or an alternate motive power provider sizing parameter in response to the engine output differential.
    Type: Application
    Filed: January 4, 2012
    Publication date: September 13, 2012
    Inventors: Vivek Anand Sujan, Morgan MacKenzie Andreae, Martin T. Books, Xi Wei
  • Publication number: 20120232730
    Abstract: A system includes a hybrid drive system having an internal combustion engine and a non-combustion motive power source. The system includes an energy storage system and a controller. The controller is structured to functionally execute operations to improve an efficiency of they hybrid drive system. The controller interprets duty cycle data, a boundary condition, and an optimization criterion. The controller further elects a load response operating condition in response to the duty cycle data, the boundary condition, and the optimization criterion. The controller adjusts the operation of the engine and/or the motive power source in response to the elected load response operating condition.
    Type: Application
    Filed: January 3, 2012
    Publication date: September 13, 2012
    Inventors: Vivek Anand Sujan, Morgan MacKenzie Andreae, Martin T. Books, Xi Wei, Terrence Shaw
  • Patent number: 8219961
    Abstract: An automated method for compensating for process-induced variations in threshold voltage and drive current in a MOSFET integrated circuit. The method's first step is selecting a transistor for analysis from the array. The method loops among the transistors of the array as desired. Next the design of the selected transistor is analyzed, including the steps of determining threshold voltage variations induced by layout neighborhood; determining drive current variations induced by layout neighborhood. The method then proceeds by attempting to compensate for any determined variations by varying the length of the transistor gate. The method can further include the step of identifying any shortcoming in compensation by varying contact spacing.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: July 10, 2012
    Assignee: Synopsys, Inc.
    Inventors: Victor Moroz, Dipankar Pramanik, Kishore Singhal, Xi-Wei Lin