Patents by Inventor James G. Mitchell

James G. Mitchell 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: 9281268
    Abstract: A multi-level interposer plate and a multi-chip module (MCM) that includes the multi-level interposer plate are described. First surfaces and second surfaces in different regions of the multi-level interposer plate have associated, different thicknesses. Moreover, first micro-spring connectors and second micro-spring connectors are respectively disposed on the first surfaces and the second surfaces. In the MCM, a given one of the first surfaces of the multi-level interposer plate faces a bridge chip in a first layer in an array of chips in the MCM so that first connectors, disposed on the bridge chip, mechanically and electrically couple to the first micro-spring connectors. Similarly, a given one of the second surfaces of the multi-level interposer plate faces an island chip in a second layer in the array of chips so that second connectors, disposed on the island chip, mechanically and electrically couple to the second micro-spring connectors.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: March 8, 2016
    Assignee: ORACLE INTERNATIONAL CORPORATION
    Inventors: Eugene M. Chow, John E. Cunningham, James G. Mitchell, Ivan Shubin
  • Patent number: 8659161
    Abstract: A chip package includes a substrate having a positive feature, which is defined on a surface of the substrate and which protrudes above a region on the surface proximate to the positive feature. Furthermore, the chip package includes a mechanical reinforcement mechanism defined on the substrate proximate to the positive feature that increases a lateral shear strength of the positive feature relative to the substrate. In this way, the chip package may facilitate increased reliability of a multi-chip module (MCM) that includes the chip package.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: February 25, 2014
    Assignee: Oracle International Corporation
    Inventors: Ashok V. Krishnamoorthy, Craig A. Stephen, John E. Cunningham, James G. Mitchell
  • Patent number: 8476749
    Abstract: A chip package is described. This chip package includes a stack of semiconductor dies or chips that are offset from each other, thereby defining a terrace with exposed pads. A high-bandwidth ramp component, which is positioned approximately parallel to the terrace, electrically couples to the exposed pads. For example, the ramp component may be electrically coupled to the semiconductor dies using: microsprings, an anisotropic film, and/or solder. Consequently, the electrical contacts may have a conductive, a capacitive or, in general, a complex impedance. Furthermore, the chips and/or the ramp component may be positioned relative to each other using a ball-and-pit alignment technique. By removing the need for costly and area-consuming through-silicon vias (TSVs) in the semiconductor dies, the chip package facilitates chips to be stacked in a manner that provides high bandwidth and low cost.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: July 2, 2013
    Assignee: Oracle America, Inc.
    Inventors: Robert J. Drost, James G. Mitchell, David C. Douglas
  • Publication number: 20120326322
    Abstract: A chip package includes a substrate having a positive feature, which is defined on a surface of the substrate and which protrudes above a region on the surface proximate to the positive feature. Furthermore, the chip package includes a mechanical reinforcement mechanism defined on the substrate proximate to the positive feature that increases a lateral shear strength of the positive feature relative to the substrate. In this way, the chip package may facilitate increased reliability of a multi-chip module (MCM) that includes the chip package.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 27, 2012
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Ashok V. Krishnamoorthy, Craig A. Stephen, John E. Cunningham, James G. Mitchell
  • Publication number: 20120266464
    Abstract: A multi-level interposer plate and a multi-chip module (MCM) that includes the multi-level interposer plate are described. First surfaces and second surfaces in different regions of the multi-level interposer plate have associated, different thicknesses. Moreover, first micro-spring connectors and second micro-spring connectors are respectively disposed on the first surfaces and the second surfaces. In the MCM, a given one of the first surfaces of the multi-level interposer plate faces a bridge chip in a first layer in an array of chips in the MCM so that first connectors, disposed on the bridge chip, mechanically and electrically couple to the first micro-spring connectors. Similarly, a given one of the second surfaces of the multi-level interposer plate faces an island chip in a second layer in the array of chips so that second connectors, disposed on the island chip, mechanically and electrically couple to the second micro-spring connectors.
    Type: Application
    Filed: June 13, 2012
    Publication date: October 25, 2012
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Eugene M. Chow, John E. Cunningham, James G. Mitchell, Ivan Shubin
  • Patent number: 8218334
    Abstract: A multi-level interposer plate and a multi-chip module (MCM) that includes the multi-level interposer plate are described. First surfaces and second surfaces in different regions of the multi-level interposer plate have associated, different thicknesses. Moreover, first micro-spring connectors and second micro-spring connectors are respectively disposed on the first surfaces and the second surfaces. In the MCM, a given one of the first surfaces of the multi-level interposer plate faces a bridge chip in a first layer in an array of chips in the MCM so that first connectors, disposed on the bridge chip, mechanically and electrically couple to the first micro-spring connectors. Similarly, a given one of the second surfaces of the multi-level interposer plate faces an island chip in a second layer in the array of chips so that second connectors, disposed on the island chip, mechanically and electrically couple to the second micro-spring connectors.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: July 10, 2012
    Assignee: Oracle America, Inc.
    Inventors: Eugene M. Chow, John E. Cunningham, James G. Mitchell, Ivan Shubin
  • Patent number: 8076178
    Abstract: Embodiments of a method for assembling a multi-chip module (MCM) are described. During this method, a fluid that includes coupling elements is applied to a surface of a base plate in the MCM. Then, at least some of the coupling elements are positioned into negative features on the surface of the base plate using fluidic assembly. Note that a given coupling element selects a given negative feature using chemical-based selection and/or geometry-based selection. Next, the fluid and excess coupling elements (which reside in regions outside of the negative features on the surface) are removed.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: December 13, 2011
    Assignee: Oracle America, Inc.
    Inventors: Ashok V. Krishnamoorthy, John E. Cunningham, James G. Mitchell
  • Publication number: 20110281395
    Abstract: Embodiments of a method for assembling a multi-chip module (MCM) are described. During this method, a fluid that includes coupling elements is applied to a surface of a base plate in the MCM. Then, at least some of the coupling elements are positioned into negative features on the surface of the base plate using fluidic assembly. Note that a given coupling element selects a given negative feature using chemical-based selection and/or geometry-based selection. Next, the fluid and excess coupling elements (which reside in regions outside of the negative features on the surface) are removed.
    Type: Application
    Filed: September 28, 2007
    Publication date: November 17, 2011
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: Ashok V. Krishnamoorthy, John E. Cunningham, James G. Mitchell
  • Patent number: 8039308
    Abstract: Embodiments of a multi-chip module (MCM) are described. This MCM includes a first semiconductor die and a second semiconductor die, where a given semiconductor die, which can be the first semiconductor die or the second semiconductor die, includes proximity connectors proximate to a surface of the given semiconductor die. Moreover, the given semiconductor die is configured to communicate signals with the other semiconductor die via proximity communication through one or more of the proximity connectors. Furthermore, the MCM includes an alignment plate and a top plate coupled to the alignment plate. This alignment plate includes a first negative feature configured to accommodate the first semiconductor die and a second negative feature configured to accommodate the second semiconductor die, and the top plate includes a positive feature. Note that the positive feature is coupled to the first semiconductor die, and the positive feature facilitates mechanical positioning of the first semiconductor die.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: October 18, 2011
    Assignee: Oracle America, Inc.
    Inventors: James G. Mitchell, John E. Cunningham, Ashok V. Krishnamoorthy
  • Publication number: 20110223778
    Abstract: A multi-level interposer plate and a multi-chip module (MCM) that includes the multi-level interposer plate are described. First surfaces and second surfaces in different regions of the multi-level interposer plate have associated, different thicknesses. Moreover, first micro-spring connectors and second micro-spring connectors are respectively disposed on the first surfaces and the second surfaces. In the MCM, a given one of the first surfaces of the multi-level interposer plate faces a bridge chip in a first layer in an array of chips in the MCM so that first connectors, disposed on the bridge chip, mechanically and electrically couple to the first micro-spring connectors. Similarly, a given one of the second surfaces of the multi-level interposer plate faces an island chip in a second layer in the array of chips so that second connectors, disposed on the island chip, mechanically and electrically couple to the second micro-spring connectors.
    Type: Application
    Filed: March 9, 2010
    Publication date: September 15, 2011
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Eugene M. Chow, John E. Cunningham, James G. Mitchell, Ivan Shubin
  • Patent number: 7961990
    Abstract: Embodiments of a system are described. This system includes an array of chip modules (CMs) and a baseplate, where the baseplate is configured to communicate data signals via optical communication. Moreover, the array includes first CMs mechanically coupled to first alignment features on the baseplate, and adjacent second CMs mechanically coupled to second alignment features on the baseplate. In this array, a given first CM is electrically coupled to a given set of electrical proximity connectors. Additionally, the array includes bridge components, wherein a given bridge component is electrically coupled to the second SCM and another set of electrical proximity connectors, which is electrically coupled to the set of electrical proximity connectors, thereby facilitating communication of other data signals between adjacent first CMs and second CMs via electrical proximity communication.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: June 14, 2011
    Assignee: Oracle America, Inc.
    Inventors: Ashok V. Krishnamoorthy, James G. Mitchell, John E. Cunningham, Brian W. O'Krafka
  • Publication number: 20110111559
    Abstract: Embodiments of a multi-chip module (MCM) are described. This MCM includes a first semiconductor die and a second semiconductor die, where a given semiconductor die, which can be the first semiconductor die or the second semiconductor die, includes proximity connectors proximate to a surface of the given semiconductor die. Moreover, the given semiconductor die is configured to communicate signals with the other semiconductor die via proximity communication through one or more of the proximity connectors. Furthermore, the MCM includes an alignment plate and a top plate coupled to the alignment plate. This alignment plate includes a first negative feature configured to accommodate the first semiconductor die and a second negative feature configured to accommodate the second semiconductor die, and the top plate includes a positive feature. Note that the positive feature is coupled to the first semiconductor die, and the positive feature facilitates mechanical positioning of the first semiconductor die.
    Type: Application
    Filed: January 13, 2011
    Publication date: May 12, 2011
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: James G. Mitchell, John E. Cunningham, Ashok V. Krishnamoorthy
  • Patent number: 7923845
    Abstract: Embodiments of a semiconductor die that includes proximity connectors proximate to a first surface of the semiconductor die are described. This semiconductor die is configured to communicate signals with another semiconductor die via proximity communication through one or more of the proximity connectors. Moreover, the semiconductor die includes a positive feature coupled to a second surface of the semiconductor die that facilitates mechanical alignment of the semiconductor die with the other semiconductor die. Note that a first region around the positive feature defines a first plane, and the positive feature protrudes above the first plane.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: April 12, 2011
    Assignee: Oracle America, Inc.
    Inventors: Ashok V. Krishnamoorthy, John E. Cunningham, James G. Mitchell
  • Patent number: 7893531
    Abstract: Embodiments of a multi-chip module (MCM) are described. This MCM includes a first semiconductor die and a second semiconductor die, where a given semiconductor die, which can be the first semiconductor die or the second semiconductor die, includes proximity connectors proximate to a surface of the given semiconductor die. Moreover, the given semiconductor die is configured to communicate signals with the other semiconductor die via proximity communication through one or more of the proximity connectors. Furthermore, the MCM includes an alignment plate and a top plate coupled to the alignment plate. This alignment plate includes a first negative feature configured to accommodate the first semiconductor die and a second negative feature configured to accommodate the second semiconductor die, and the top plate includes a positive feature. Note that the positive feature is coupled to the first semiconductor die, and the positive feature facilitates mechanical positioning of the first semiconductor die.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: February 22, 2011
    Assignee: Oracle America, Inc.
    Inventors: James G. Mitchell, John E. Cunningham, Ashok V. Krishnamoorthy
  • Publication number: 20110018120
    Abstract: A chip package is described. This chip package includes a stack of semiconductor dies or chips that are offset from each other, thereby defining a terrace with exposed pads. A high-bandwidth ramp component, which is positioned approximately parallel to the terrace, electrically couples to the exposed pads. For example, the ramp component may be electrically coupled to the semiconductor dies using: microsprings, an anisotropic film, and/or solder. Consequently, the electrical contacts may have a conductive, a capacitive or, in general, a complex impedance. Furthermore, the chips and/or the ramp component may be positioned relative to each other using a ball-and-pit alignment technique. By removing the need for costly and area-consuming through-silicon vias (TSVs) in the semiconductor dies, the chip package facilitates chips to be stacked in a manner that provides high bandwidth and low cost.
    Type: Application
    Filed: July 22, 2009
    Publication date: January 27, 2011
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: Robert J. Drost, James G. Mitchell, David C. Douglas
  • Publication number: 20100266240
    Abstract: Embodiments of a system are described. This system includes an array of chip modules (CMs) and a baseplate, where the baseplate is configured to communicate data signals via optical communication. Moreover, the array includes first CMs mechanically coupled to first alignment features on the baseplate, and adjacent second CMs mechanically coupled to second alignment features on the baseplate. In this array, a given first CM is electrically coupled to a given set of electrical proximity connectors. Additionally, the array includes bridge components, wherein a given bridge component is electrically coupled to the second SCM and another set of electrical proximity connectors, which is electrically coupled to the set of electrical proximity connectors, thereby facilitating communication of other data signals between adjacent first CMs and second CMs via electrical proximity communication.
    Type: Application
    Filed: December 21, 2007
    Publication date: October 21, 2010
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: Ashok V. Krishnamoorthy, James G. Mitchell, John E. Cunningham, Brian W. O'Krafka
  • Publication number: 20090085183
    Abstract: Embodiments of a multi-chip module (MCM) are described. This MCM includes a first semiconductor die and a second semiconductor die, where a given semiconductor die, which can be the first semiconductor die or the second semiconductor die, includes proximity connectors proximate to a surface of the given semiconductor die. Moreover, the given semiconductor die is configured to communicate signals with the other semiconductor die via proximity communication through one or more of the proximity connectors. Furthermore, the MCM includes an alignment plate and a top plate coupled to the alignment plate. This alignment plate includes a first negative feature configured to accommodate the first semiconductor die and a second negative feature configured to accommodate the second semiconductor die, and the top plate includes a positive feature. Note that the positive feature is coupled to the first semiconductor die, and the positive feature facilitates mechanical positioning of the first semiconductor die.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: James G. Mitchell, John E. Cunningham, Ashok V. Krishnamoorthy
  • Publication number: 20090085233
    Abstract: Embodiments of a semiconductor die that includes proximity connectors proximate to a first surface of the semiconductor die are described. This semiconductor die is configured to communicate signals with another semiconductor die via proximity communication through one or more of the proximity connectors. Moreover, the semiconductor die includes a positive feature coupled to a second surface of the semiconductor die that facilitates mechanical alignment of the semiconductor die with the other semiconductor die. Note that a first region around the positive feature defines a first plane, and the positive feature protrudes above the first plane.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: Ashok V. Krishnamoorthy, John E. Cunningham, James G. Mitchell
  • Patent number: 7252396
    Abstract: A retroreflective article having at least one valve is disclosed. Each valve may include a channel extending from a first major surface to a second major surface of the retroreflective material, and at least one movable member proximate the channel. The at least one movable member is movable between a closed position and an open position. When in the closed position, the at least one movable member obstructs at least a portion of the channel. A method of making a retroreflective article having at least one valve is also disclosed.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: August 7, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Paul E. Marecki, James G. Mitchell
  • Patent number: 5787251
    Abstract: The present invention provides an elegant and simple way to provide mechanisms for invocation of objects by client applications and for argument passing between client applications and object implementations, without the client application or the operating system knowing the details of how these mechanisms work. Moreover, these mechanisms functions in a distributed computer environment with similar ease and efficiency, where client applications may be on one computer node and object implementations on another. The invention includes a new type of object, termed a "spring object," which includes a method table, a subcontract mechanism and a data structure which represents the subcontract's local private state.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: July 28, 1998
    Assignee: Sun Microsystems, Inc.
    Inventors: Graham Hamilton, Michael L. Powell, James G. Mitchell, Jonathan J. Gibbons