Patents by Inventor Krishna Seshan

Krishna Seshan 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: 7960831
    Abstract: A ball-limiting metallurgy (BLM) stack is provided for an electrical device. The BLM stack resists tin migration toward the metallization of the device. A solder system is also provided that includes a eutectic-Pb solder on a substrate that is mated to a high-Pb solder, and that withstands higher temperature reflows and other higher temperature processes.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: June 14, 2011
    Assignee: Intel Corporation
    Inventors: Fay Hua, Albert T. Wu, Kevin Jeng, Krishna Seshan
  • Patent number: 7511370
    Abstract: An electrical device includes electrical contact pads, a supply voltage bus and an interconnection circuit. The electrical contact pads receive a supply voltage, and the bus is electrically connected to the electrical contact pads. For each electrical contact pad, the interconnection circuit forms a redundant connection between the bus and the electrical contact pad. The electrical device may include a passivation layer that includes windows to establish electrical contact between the electrical contact pads and the supply voltage bus. This window may be elongated in a path that is generally aligned with the path along which the supply voltage bus extends.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: March 31, 2009
    Assignee: Intel Corporation
    Inventor: Krishna Seshan
  • Patent number: 7425458
    Abstract: Selectable capacitors are used to modify performance characteristics of functional circuit elements of an integrated circuit (IC). In an embodiment, the decoupling capacitors are implemented as additional or alternative mounting pads on a surface of the IC. At least one selectable capacitor is provided for each IC circuit element, such as a logic network, whose operational characteristic(s) is predicted to be and is actually identified as sub-optimal through IC testing, particularly following a process change, a mask shrink, operation of the IC at higher clock frequency, or the like. Expensive redesign is avoided by selectively coupling capacitors into the IC circuit element as needed, under control of selector logic that is responsive to control signals. Methods of operation, as well as application of the apparatus to an electronic assembly and an electronic system, are also described.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: September 16, 2008
    Assignee: Intel Corporation
    Inventor: Krishna Seshan
  • Patent number: 7411269
    Abstract: An apparatus and methods for modifying isolation structure configurations for MOS devices to either induce or reduce tensile and/or compressive stresses on an active area of the MOS devices. The isolation structure configurations according to the present invention include the use of low-modulus and high-modulus, dielectric materials, as well as, tensile stress-inducing and compressive stress-inducing, dielectric materials, and further includes altering the depth of the isolation structure and methods for modifying isolation structure configurations, such as trench depth and isolation materials used, to modify (i.e., to either induce or reduce) tensile and/or compressive stresses on an active area of a semiconductor device.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: August 12, 2008
    Assignee: Intel Corporation
    Inventors: Qing Ma, Jin Lee, Harry Fujimoto, Changhong Dai, Shiuh-Wuu Lee, Travis Eiles, Krishna Seshan
  • Patent number: 7410858
    Abstract: An apparatus and methods for modifying isolation structure configurations for MOS devices to either induce or reduce tensile and/or compressive stresses on an active area of the MOS devices. The isolation structure configurations according to the present invention include the use of low-modulus and high-modulus, dielectric materials, as well as, tensile stress-inducing and compressive stress-inducing, dielectric materials, and further includes altering the depth of the isolation structure and methods for modifying isolation structure configurations, such as trench depth and isolation materials used, to modify (i.e., to either induce or reduce) tensile and/or compressive stresses on an active area of a semiconductor device.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: August 12, 2008
    Assignee: Intel Corporation
    Inventors: Qing Ma, Jin Lee, Harry Fujimoto, Changhong Dai, Shiuh-Wuu Lee, Travis Eiles, Krishna Seshan
  • Publication number: 20080078994
    Abstract: A microelectronic die includes: a die substrate; an integrated circuit supported in an active area of the substrate; a plurality of bond pads disposed at a surface of the substrate, at least some of the bond pads being coupled to the integrated circuit; a guard wall supported in the substrate and surrounding a periphery of the active region; and electrical connections adapted to apply a voltage differential across the guard wall to allow a damage testing of the guard wall.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 3, 2008
    Inventor: Krishna Seshan
  • Patent number: 7314819
    Abstract: A ball-limiting metallurgy (BLM) stack is provided for an electrical device. The BLM stack resists tin migration toward the metallization of the device. A solder system is also provided that includes a eutectic-Pb solder on a substrate that is mated to a high-Pb solder, and that withstands higher temperature reflows and other higher temperature processes.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: January 1, 2008
    Assignee: Intel Corporation
    Inventors: Fay Hua, Albert T. Wu, Kevin Jeng, Krishna Seshan
  • Publication number: 20070284741
    Abstract: A ball-limiting metallurgy (BLM) stack is provided for an electrical device. The BLM stack resists tin migration toward the metallization of the device. A solder system is also provided that includes a eutectic-Pb solder on a substrate that is mated to a high-Pb solder, and that withstands higher temperature reflows and other higher temperature processes.
    Type: Application
    Filed: August 17, 2007
    Publication date: December 13, 2007
    Inventors: Fay Hua, Albert Wu, Kevin Jeng, Krishna Seshan
  • Patent number: 7262070
    Abstract: Embodiments of the present invention form a weight-compensating/tuning layer on a structure (e.g., a silicon wafer with one or more layers of material (e.g., films)) having variations in its surface topology. The variations in surface topology take the form of thick and thin regions of materials. The weight-compensating/tuning layer includes narrow and wide regions corresponding to the thick and thin regions, respectively.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: August 28, 2007
    Assignee: Intel Corporation
    Inventors: Theodore Doros, Krishna Seshan
  • Patent number: 7250333
    Abstract: A method and apparatus for a linearized output driver and terminator is described. In one embodiment the method includes forming a gate electrode on a substrate, the portion of the substrate covered by the gate electrode defining a channel. The method further includes forming a first source/drain doped region on laterally opposed sides of the gate electrode in the substrate. The method also includes forming a spacer on laterally opposed sides of the gate electrode on the substrate. The method also includes forming a linearized drain contact region at a location within the first source/drain doped region sufficiently distant from the gate electrode to define a series resistor in the first source/drain doped region disposed between the gate electrode and the linearized drain contact area based on an expected resistivity of the source/drain doped region, the series resistor coupled electrically to the channel.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: July 31, 2007
    Assignee: Intel Corporation
    Inventors: Sanjay Dabral, Krishna Seshan
  • Publication number: 20070139140
    Abstract: Multiple FBARs may be manufactured on a single wafer and later diced. Ideally, all devices formed in a wafer would have the same resonance frequency. However, due to manufacturing variances, the frequency response of the FBAR devices may vary slightly across the wafer. An RF map may be created to determine zones over the wafer where FBARs in that zone all vary from a target frequency by a similar degree. A tuning layer may be deposited over the wafer. Lithographically patterned features to the tuning layer based on the zones identified by the RF map may be used to correct the FBARs to a target resonance frequency with the FBARs still intact on the wafer.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Inventors: Valluri Rao, Theodore Doros, Qing Ma, Krishna Seshan, Li-Peng Wang
  • Patent number: 7202568
    Abstract: A method of passivating an integrated circuit (IC) is provided. An insulating layer is formed onto the IC. An adhesion layer is formed onto a surface of the insulating layer by treating the surface of the insulating layer with a gas. A first passivation layer is formed upon the adhesion layer, the first passivation layer and the gas including at least one common chemical element.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: April 10, 2007
    Assignee: Intel Corporation
    Inventors: Krishna Seshan, M. Lawrence A. Dass, Geoffrey L. Bakker
  • Publication number: 20070013023
    Abstract: An apparatus and methods for modifying isolation structure configurations for MOS devices to either induce or reduce tensile and/or compressive stresses on an active area of the MOS devices. The isolation structure configurations according to the present invention include the use of low-modulus and high-modulus, dielectric materials, as well as, tensile stress-inducing and compressive stress-inducing, dielectric materials, and further includes altering the depth of the isolation structure and methods for modifying isolation structure configurations, such as trench depth and isolation materials used, to modify (i.e., to either induce or reduce) tensile and/or compressive stresses on an active area of a semiconductor device.
    Type: Application
    Filed: September 22, 2006
    Publication date: January 18, 2007
    Inventors: Qing Ma, Jin Lee, Harry Fujimoto, Changhong Dai, Shiuh-Wuu Lee, Travis Eiles, Krishna Seshan
  • Publication number: 20070004086
    Abstract: A ball-limiting metallurgy (BLM) stack is provided for an electrical device. The BLM stack resists tin migration toward the metallization of the device. A solder system is also provided that includes a eutectic-Pb solder on a substrate that is mated to a high-Pb solder, and that withstands higher temperature reflows and other higher temperature processes.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 4, 2007
    Inventors: Fay Hua, Albert Wu, Kevin Jeng, Krishna Seshan
  • Publication number: 20060220147
    Abstract: An apparatus and methods for modifying isolation structure configurations for MOS devices to either induce or reduce tensile and/or compressive stresses on an active area of the MOS devices. The isolation structure configurations according to the present invention include the use of low-modulus and high-modulus, dielectric materials, as well as, tensile stress-inducing and compressive stress-inducing, dielectric materials, and further includes altering the depth of the isolation structure and methods for modifying isolation structure configurations, such as trench depth and isolation materials used, to modify (i.e., to either induce or reduce) tensile and/or compressive stresses on an active area of a semiconductor device.
    Type: Application
    Filed: May 19, 2006
    Publication date: October 5, 2006
    Inventors: Qing Ma, Jin Lee, Harry Fujimoto, Changhong Dai, Shiuh-Wuu Lee, Travis Eiles, Krishna Seshan
  • Publication number: 20060180945
    Abstract: In one embodiment, the present invention includes an apparatus having a metal layer with a pad disposed above a substrate; and a cap disposed above the metal layer having a first portion to provide for contact with a probe and a second portion to provide a bonding surface, and the cap is electrically coupled to the pad.
    Type: Application
    Filed: April 12, 2006
    Publication date: August 17, 2006
    Inventors: Krishna Seshan, Kevin Jeng, Haiping Dun
  • Publication number: 20060131748
    Abstract: The present invention discloses a novel layout and process for a device with segmented BLM for the I/Os. In a first embodiment, each BLM is split into two segments. The segments are close to each other and connected to the same overlying bump. In a second embodiment, each BLM is split into more than two segments. In a third embodiment, each segment is electrically connected to more than one underlying via. In a fourth embodiment, each segment is electrically connected to more than one underlying bond pad.
    Type: Application
    Filed: January 31, 2006
    Publication date: June 22, 2006
    Inventor: Krishna Seshan
  • Patent number: 7056817
    Abstract: In one embodiment, the present invention includes an apparatus having a metal layer with a pad disposed above a substrate; and a cap disposed above the metal layer having a first portion to provide for contact with a probe and a second portion to provide a bonding surface, and the cap is electrically coupled to the pad.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: June 6, 2006
    Assignee: Intel Corporation
    Inventors: Krishna Seshan, Kevin Jeng, Haiping Dun
  • Patent number: 7034402
    Abstract: The present invention discloses a novel layout and process for a device with segmented BLM for the I/Os. In a first embodiment, each BLM is split into two segments. The segments are close to each other and connected to the same overlying bump. In a second embodiment, each BLM is split into more than two segments. In a third embodiment, each segment is electrically connected to more than one underlying via. In a fourth embodiment, each segment is electrically connected to more than one underlying bond pad.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: April 25, 2006
    Assignee: Intel Corporation
    Inventor: Krishna Seshan
  • Patent number: 7033923
    Abstract: The present invention discloses a novel layout and process for a device with segmented BLM for the I/Os. In a first embodiment, each BLM is split into two segments. The segments are close to each other and connected to the same overlying bump. In a second embodiment, each BLM is split into more than two segments. In a third embodiment, each segment is electrically connected to more than one underlying via. In a fourth embodiment, each segment is electrically connected to more than one underlying bond pad.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: April 25, 2006
    Assignee: Intel Corporation
    Inventor: Krishna Seshan