Patents by Inventor Hem M. Vaidya

Hem M. Vaidya 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).

  • Publication number: 20150093977
    Abstract: Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous groves, double spiral grooves, and multiply overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Application
    Filed: December 5, 2014
    Publication date: April 2, 2015
    Inventors: Manish Deopura, Hem M. Vaidya, Pradip K. Roy
  • Patent number: 8932116
    Abstract: Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous groves, double spiral grooves, and multiply overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: January 13, 2015
    Assignee: NexPlanar Corporation
    Inventors: Manish Deopura, Hem M. Vaidya, Pradip K. Roy
  • Publication number: 20130059509
    Abstract: Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous groves, double spiral grooves, and multiply overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 7, 2013
    Inventors: Manish Deopura, Hem M. Vaidya, Pradip K. Roy
  • Patent number: 8287793
    Abstract: Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous grooves, double spiral grooves, and multiple overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: October 16, 2012
    Assignee: NexPlanar Corporation
    Inventors: Manish Deopura, Hem M. Vaidya, Pradip K. Roy
  • Publication number: 20080211141
    Abstract: Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous groves, double spiral grooves, and multiply overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Application
    Filed: November 28, 2007
    Publication date: September 4, 2008
    Inventors: Manish Deopura, Hem M. Vaidya, Pradip K. Roy
  • Patent number: 7377840
    Abstract: Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous groves, double spiral grooves, and multiply overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: May 27, 2008
    Assignee: Neopad Technologies Corporation
    Inventors: Manish Deopura, Hem M. Vaidya, Pradip K. Roy
  • Patent number: 6576521
    Abstract: A NMOSFET semiconductor device is formed having an LDD structure by simultaneous co-implantation of arsenic and phosphorous to form an N− layer. The co-implantation is performed subsequent to the formation of the gate structure and a thin (100 Å-300 Å) gate spacer but prior to the implantation of a highly doped N+ source/drain.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: June 10, 2003
    Assignee: Agere Systems Inc.
    Inventors: Samir Chaudhry, Sundar S. Chetlur, Hem M. Vaidya
  • Patent number: 6458016
    Abstract: A polishing fluid comprising a distributed organic phase and a continuous aqueous phase. The distributed phase has at least one complexing agent and the aqueous phase has abrasive particles dispersed therein. Reaction products generated during polishing interact with the complexing agent(s) to form organometallic complexes. Further disclosed is a polishing method, a semiconductor device and semiconductor device fabrication method utilizing the polishing fluid.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: October 1, 2002
    Assignee: Agere System Guardian Corp.
    Inventors: Sailesh Mansinh Merchant, Sudhanshu Misra, Pradip Kumar Roy, Hem M. Vaidya
  • Patent number: 6380606
    Abstract: The present invention provides methods of manufacturing a field oxide isolation structure over a semiconductor. One of the methods includes the steps of: (1) depositing a first stack-nitride sublayer over the semiconductor at a first deposition rate and (2) subsequently depositing a second stack-nitride sublayer over the first stack-sublayer at a second deposition rate that is either greater or less than the first deposition rate. The first and second deposition rates provide first and second stack-nitride sublayers that cooperate to form a relatively thin, uniform thickness of the field oxide isolation structure over the semiconductor and provide a stress-accommodating system within the semiconductor. The varying rates of deposition and accompanying changes in mixture ratio, produce a stack that is better able to absorb stress, has greater uniformity and is far less subject to the disadvantageous phenomenon of stack-lifting, particularly encountered in semiconductor having a PADOX layer deposited thereon.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: April 30, 2002
    Assignee: Agere Systems Guardian Corp
    Inventors: David C. Brady, Isik C. Kizilyalli, Pradip K. Roy, Hem M. Vaidya
  • Patent number: 6375541
    Abstract: A polishing fluid comprising a distributed organic phase and a continuous aqueous phase. The distributed phase has at least one complexing agent and the aqueous phase has abrasive particles dispersed therein. Reaction products generated during polishing interact with the complexing agent(s) to form organometallic complexes. Further disclosed is a polishing method, a semiconductor device and semiconductor device fabrication method utilizing the polishing fluid.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: April 23, 2002
    Assignee: Lucent Technologies, Inc.
    Inventors: Sailesh Mansinh Merchant, Sudhanshu Misra, Pradip Kumar Roy, Hem M. Vaidya
  • Publication number: 20010036795
    Abstract: A polishing fluid comprising a distributed organic phase and a continuous aqueous phase. The distributed phase has at least one complexing agent and the aqueous phase has abrasive particles dispersed therein. Reaction products generated during polishing interact with the complexing agent(s) to form organometallic complexes. Further disclosed is a polishing method, a semiconductor device and semiconductor device fabrication method utilizing the polishing fluid.
    Type: Application
    Filed: June 28, 2001
    Publication date: November 1, 2001
    Applicant: Lucent Technologies, Inc.
    Inventors: Sailesh Mansinh Merchant, Sudhanshu Misra, Pradip Kumar Roy, Hem M. Vaidya
  • Patent number: 6291848
    Abstract: An integrated circuit capacitor includes a substrate, a first dielectric layer adjacent the substrate and having a first trench therein, and a first metal plug extending upwardly into the first trench. An interconnection line overlies the first trench and contacts the first metal plug to define anchoring recesses on opposite sides of the first metal plug. A second dielectric layer is on the interconnection line and has a second trench therein. A second metal plug extends upwardly into the second trench. More particularly, the second metal plug includes a body portion extending upwardly into the second trench, and anchor portions connected to the body portion and engaging the anchoring recesses to anchor the second metal plug to the interconnection line. Because the second metal plug is anchored, a depth of the second trench can be greater without the metal plug becoming loose and separating from the underlying interconnection line.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: September 18, 2001
    Assignee: Agere Systems Guardian Corp.
    Inventors: Sundar Srinivasan Chetlur, James Theodore Clemens, Sailesh Mansinh Merchant, Pradip Kumar Roy, Hem M. Vaidya
  • Patent number: 6249016
    Abstract: An integrated circuit capacitor includes a first dielectric layer adjacent a substrate and having a trench therein, and a metal plug comprising an upper portion extending upwardly into the trench, and a lower portion disposed in the first dielectric layer. The lower portion has a tapered width which increases in a direction toward the substrate to thereby secure the metal plug in the dielectric layer. Preferably, the upper portion is also tapered. Furthermore, a second dielectric layer is adjacent the metal plug with an upper electrode thereon.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: June 19, 2001
    Assignee: Agere Systems Guardian Corp.
    Inventors: Samir Chaudhry, Sundar Srinivasan Chetlur, Nace Layadi, Pradip Kumar Roy, Hem M. Vaidya
  • Patent number: 6204186
    Abstract: A method of making a capacitor includes the steps of forming an interconnection line above a substrate, depositing a first dielectric layer on the interconnection line, and etching a via in the first dielectric layer. The via has a tapered width which increases in a direction toward the substrate. Further, the method includes filling the via with a conductive metal to form a metal plug, and etching a trench in the first dielectric layer around an upper portion of the metal plug. The metal plug has a tapered width which secures it into the dielectric layer. A second dielectric layer is deposited adjacent the metal plug and an upper electrode is deposited on the second dielectric layer. Preferably, a lower electrode is deposited to line the trench and contact the metal plug.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Samir Chaudhry, Sundar Srinivasan Chetlur, Nace Layadi, Pradip Kumar Roy, Hem M. Vaidya
  • Patent number: 6153452
    Abstract: Methods of manufacturing a semiconductor device. One method includes the steps of: (1) providing a substrate over which is to be deposited a metal silicide layer having a stoichiometric ratio within a desired range, (2) providing a target composed of a metal silicide, the target subject to degradation by reason of use, (3) sputtering atoms from the target to form the metal silicide layer over the substrate, the stoichiometric ratio subject to being without the desired range by reason of the degradation of the target and (4) depositing a predetermined amount of silicon on the metal silicide layer to return the stoichiometric ratio to within the desired range, a useful life of the target thereby increased.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: November 28, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Sailesh M. Merchant, Arun K. Nanda, Pradip K. Roy, Hem M. Vaidya
  • Patent number: 6103586
    Abstract: A method for making an integrated circuit capacitor includes forming a first dielectric layer adjacent a substrate, forming a first opening in the first dielectric layer, filling the first opening with a conductive material to define a first metal plug, and forming a trench in the first dielectric layer adjacent the first metal plug. An interconnection line lines the first trench and contacts the first metal plug to define anchoring recesses on opposite sides of the first metal plug. The method further includes forming a second dielectric layer on the interconnection line, forming a second opening in the second dielectric layer, and filling the second opening with a conductive metal to define a second metal plug having a body portion and anchor portions extending downward from the body portion for engaging the anchoring recesses to anchor the second metal plug. A second trench is formed in the second dielectric layer adjacent the second metal plug, and is aligned with the first trench.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: August 15, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Sundar Srinivasan Chetlur, James Theodore Clemens, Sailesh Mansinh Merchant, Pradip Kumar Roy, Hem M. Vaidya
  • Patent number: 6090686
    Abstract: The present invention provides methods of manufacturing a field oxide isolation structure over a semiconductor. One of the methods includes the steps of: (1) depositing a first stack-nitride sublayer over the semiconductor at a first deposition rate and (2) subsequently depositing a second stack-nitride sublayer over the first stack-sublayer at a second deposition rate that is either greater or less than the first deposition rate. The first and second deposition rates provide first and second stack-nitride sublayers that cooperate to form a relatively thin, uniform thickness of the field oxide isolation structure over the semiconductor and provide a stress-accommodating system within the semiconductor. The varying rates of deposition and accompanying changes in mixture ratio, produce a stack that is better able to absorb stress, has greater uniformity and is far less subject to the disadvantageous phenomenon of stack-lifting, particularly encountered in semiconductor having a PADOX layer deposited thereon.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: July 18, 2000
    Assignee: Lucent Technologies, Inc.
    Inventors: David C. Brady, Isik C. Kizilyalli, Pradip K. Roy, Hem M. Vaidya