Patents by Inventor Ashutosh Misra

Ashutosh Misra 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: 7535908
    Abstract: A method for data transfer. The method includes: generating a sequence number and storing the sequence number in a retry buffer; generating a cyclic redundancy check remainder; receiving packet data slices of a data packet; in sequence for each packet data slice received, modifying the cyclic redundancy check remainder using a currently received packet data slice and storing the currently received packet data slice in the retry buffer; and after modifying the cyclic redundancy check remainder using a last received packet data slice, storing the last received packet data slice in the retry buffer, modifying the cyclic redundancy check remainder using the last received packet data slice to create a last cyclic redundancy check remainder and storing the last cyclic redundancy check remainder in the retry buffer, the sequence number, the packet data slices and the last cyclic redundancy check remainder comprising a modified data packet.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: May 19, 2009
    Assignee: International Business Machines Corporation
    Inventors: Shridhar N. Ambilkar, Girish G. Kurup, Ashutosh Misra
  • Patent number: 7509640
    Abstract: Task distribution is performed in hardware without the use of “division” logic component to divide executions between task execution registers, which advantageously require less silicon when implemented in hardware. Instead, a remainder register is used as a temporary store for the number of task executions yet to distributed to task execution registers. Task execution registers are incremented with a value represented by the data pattern of n MSBs of the number of executions required. Corresponding increment and decrement operations occur until task executions, represented by the data value stored in the remainder register, are effectively distributed to task execution registers.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: March 24, 2009
    Assignee: International Business Machines Corporation
    Inventors: Shridhar Ambilkar, Ashutosh Misra, Raju B Pudota
  • Patent number: 7498295
    Abstract: This disclosure discusses cleaning of semiconductor wafers after the Chemical-Mechanical Planarization (CMP) of the wafer during the manufacturing of semiconductor devices. Disclosed is an alkaline chemistry for the post-CMP cleaning of wafers containing metal, particularly copper, interconnects. Residual slurry particles, particularly copper or other metal particles, are removed from the wafer surface without significantly etching the metal, leaving deposits on the surface, or imparting significant contamination to the wafer while also protecting the metal from oxidation and corrosion. Additionally, at least one strong chelating agent is present to complex metal ions in solution, facilitating the removal of metal from the dielectric and preventing re-deposition onto the wafer.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: March 3, 2009
    Assignee: Air Liquide Electronics U.S. LP
    Inventors: Matthew L. Fisher, Ashutosh Misra
  • Patent number: 7482286
    Abstract: Method for producing a metal silicon (oxy)nitride by introducing a carbon-free silicon source (for example, (SiH3)3N), a metal precursor with the general formula MXn (for example, Hf(NEt2)4), and an oxidizing agent (for example, O2) into a CVD chamber and reacting same at the surface of a substrate. MsiN, MSIo and/or MSiON films may be obtained. These films are useful are useful as high k dielectrics films.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: January 27, 2009
    Assignee: L'Air Liquide, Societe Anonyme A Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Ashutosh Misra, Matthew Fisher, Benjamin Jurcik, Christian Dussarrat, Eri Tsukada, Jean-Marc Girard
  • Publication number: 20090020140
    Abstract: Methods and compositions for purging and cleaning a semiconductor fabrication system are disclosed herein. In general, the disclosed methods utilize solvents comprising hydrofluoroethers. Hydrofluoroethers are non-toxic and have low moisture content, preventing heat generation from organometallic precursor hydrolysis. In an embodiment, a method of cleaning a semiconductor fabrication system comprises dissolving at least one chemical precursor used in semiconductor fabrication in at least one delivery line with a solvent to clean the at least one delivery line. The solvent generally comprises a hydrofluoroether. The methods and compositions may be used in a variety of semiconductor film deposition processes.
    Type: Application
    Filed: June 9, 2008
    Publication date: January 22, 2009
    Applicant: AIR LIQUIDE ELECTRONICS U.S. LP
    Inventors: Zhiwen WAN, Ashutosh Misra, Ziyun Wang
  • Patent number: 7435712
    Abstract: This disclosure discusses cleaning of semiconductor wafers after the Chemical-Mechanical Planarization (CMP) of the wafer during the manufacturing of semiconductor devices. Disclosed is an alkaline chemistry for the post-CMP cleaning of wafers containing metal, particularly copper, interconnects. Residual slurry particles, particularly copper or other metal particles, are removed from the wafer surface without significantly etching the metal, leaving deposits on the surface, or imparting significant contamination to the wafer while also protecting the metal from oxidation and corrosion. Additionally, at least one strong chelating agent is present to complex metal ions in solution, facilitating the removal of metal from the dielectric and preventing re-deposition onto the wafer.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: October 14, 2008
    Assignee: Air Liquide America, L.P.
    Inventors: Ashutosh Misra, Matthew L. Fisher
  • Publication number: 20080214003
    Abstract: Methods for forming a film on a substrate in a semiconductor manufacturing process A reaction chamber a substrate in the chamber are provided. A ruthenium based precursor, which includes ruthenium tetroxide dissolved in a mixture of at least two non-flammable fluorinated solvents, is provided and a ruthenium containing film is produced on the substrate.
    Type: Application
    Filed: February 21, 2008
    Publication date: September 4, 2008
    Inventors: Bin XIA, Ashutosh Misra
  • Publication number: 20080125341
    Abstract: This disclosure discusses cleaning of semiconductor wafers after the Chemical-Mechanical Planarization (CMP) of the wafer during the manufacturing of semiconductor devices. Disclosed is an acidic chemistry for the post-CMP cleaning of wafers containing metal, particularly copper, interconnects. Residual slurry particles, particularly copper or other metal particles, are removed from the wafer surface without significantly etching the metal, leaving deposits on the surface, or imparting significant organic (such as carbon) contamination to the wafer while also protecting the metal from oxidation and corrosion. Additionally, at least one strong chelating agent is present to complex metal ions in solution, facilitating the removal of metal from the dielectric and preventing re-deposition onto the wafer. Using acidic chemistry, it is possible to match the pH of the cleaning solution used after CMP to that of the last slurry used on the wafer surface.
    Type: Application
    Filed: October 25, 2007
    Publication date: May 29, 2008
    Applicant: Air Liquide America L.P.
    Inventors: Ashutosh MISRA, Matthew L. Fisher
  • Publication number: 20080081106
    Abstract: Novel silicon precursors for low temperature deposition of silicon films are described herein. The disclosed precursors possess low vaporization temperatures, preferably less than about 500° C. In addition, embodiments of the silicon precursors incorporate a —Si—Y—Si— bond, where Y may comprise an amino group, a substituted or unsubstituted hydrocarbyl group, or oxygen. In an embodiment a silicon precursor has the formula: where Y is a hydrocarbyl group, a substituted hydrocarbyl group, oxygen, or an amino group; R1, R2, R3, and R4 are each independently a hydrogen group, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, wherein R1, R2, R3, and R4 may be the same or different from one another; X1, X2, X3, and X4 are each independently, a hydrogen group, a hydrocarbyl group, a substituted hydrocarbyl group, or a hydrazino group, wherein X1, X2, X3, and X4 may be the same or different from one another.
    Type: Application
    Filed: April 2, 2007
    Publication date: April 3, 2008
    Applicant: AIR LIQUIDE ELECTRONICS U.S. LP
    Inventors: Ziyun Wang, Ashutosh Misra, Ravi Laxman
  • Publication number: 20080047592
    Abstract: This disclosure discusses cleaning of semiconductor wafers after the Chemical-Mechanical Planarization (CMP) of the wafer during the manufacturing of semiconductor devices. Disclosed is an alkaline chemistry for the post-CMP cleaning of wafers containing metal, particularly copper, interconnects. Residual slurry particles, particularly copper or other metal particles, are removed from the wafer surface without significantly etching the metal, leaving deposits on the surface, or imparting significant contamination to the wafer while also protecting the metal from oxidation and corrosion. Additionally, at least one strong chelating agent is present to complex metal ions in solution, facilitating the removal of metal from the dielectric and preventing re-deposition onto the wafer.
    Type: Application
    Filed: July 31, 2007
    Publication date: February 28, 2008
    Inventors: Matthew FISHER, Ashutosh Misra
  • Patent number: 7297670
    Abstract: This disclosure discusses cleaning of semiconductor wafers after the Chemical-Mechanical Planarization (CMP) of the wafer during the manufacturing of semiconductor devices. Disclosed is an acidic chemistry for the post-CMP cleaning of wafers containing metal, particularly copper, interconnects. Residual slurry particles, particularly copper or other metal particles, are removed from the wafer surface without significantly etching the metal, leaving deposits on the surface, or imparting significant organic (such as carbon) contamination to the wafer while also protecting the metal from oxidation and corrosion. Additionally, at least one strong chelating agent is present to complex metal ions in solution, facilitating the removal of metal from the dielectric and preventing re-deposition onto the wafer. Using acidic chemistry, it is possible to match the pH of the cleaning solution used after CMP to that of the last slurry used on the wafer surface.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: November 20, 2007
    Assignee: Air Liquide America L.P.
    Inventors: Ashutosh Misra, Matthew L. Fisher
  • Patent number: 7293569
    Abstract: Compositions and methods for cleaning deposition systems utilizing alkylsilanes are described herein. In an embodiment, a method of cleaning a semiconductor fabrication system comprises flushing the system with a solvent comprising at least one alkylsilane. In another embodiment, a method of removing at least one chemical precursor from a semiconductor fabrication system comprises forcing a solvent containing at least one alkylsilane through the semiconductor fabrication system and dissolving the at least one chemical precursor in the solvent. The solvent may also contain mixtures of different alkylsilanes and other organic solvents.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: November 13, 2007
    Assignee: Air Liquide Electronics U.S. LP
    Inventors: Ravi Laxman, Ashutosh Misra, Jean-Marc Girard
  • Publication number: 20070232511
    Abstract: Post CMP cleaning solutions are provided including at least one cleaning agent comprising an organic acid compound, at least one preservative compound that substantially minimizes or prevents microbial growth in the cleaning solution, and at least one amine compound. The preservative compound can be another organic acid compound that protects the cleaning solution against microbial growth. The cleaning solutions preferably have a pH ranging from about 2 to about 7.
    Type: Application
    Filed: June 30, 2006
    Publication date: October 4, 2007
    Inventors: Matthew Fisher, Ashutosh Misra
  • Publication number: 20070190807
    Abstract: Method for producing a metal silicon (oxy)nitride by introducing a carbon-free silicon source (for example, (SiH3)3N), a metal precursor with the general formula MXn (for example, Hf(NEt2)4), and an oxidizing agent (for example, O2) into a CVD chamber and reacting same at the surface of a substrate. MsiN, MSIo and/or MSiON films may be obtained. These films are useful are useful as high k dielectrics films.
    Type: Application
    Filed: February 24, 2005
    Publication date: August 16, 2007
    Inventors: Ashutosh Misra, Matthew Fisher, Benjamin Jurcik, Christian Dussarrat, Eri Tsukada, Jean-Marc Girard
  • Publication number: 20070131252
    Abstract: Compositions and methods for cleaning deposition systems utilizing alkylsilanes are described herein. In an embodiment, a method of cleaning a semiconductor fabrication system comprises flushing the system with a solvent comprising at least one alkylsilane. In another embodiment, a method of removing at least one chemical precursor from a semiconductor fabrication system comprises forcing a solvent containing at least one alkylsilane through the semiconductor fabrication system and dissolving the at least one chemical precursor in the solvent. The solvent may also contain mixtures of different alkylsilanes and other organic solvents.
    Type: Application
    Filed: July 10, 2006
    Publication date: June 14, 2007
    Inventors: Ravi Laxman, Ashutosh Misra
  • Publication number: 20070062270
    Abstract: A chemical storage device and a method for monitoring chemical usage are described herein. The device and disclosed method utilize a chemical storage canister and a load cell integrated into one transportable unit. The load cell is capable of compensating for the added weight of attached dispensing devices used in the semiconductor industry. Additionally, the load cell continuously displays the weight of the chemicals as they are withdrawn from the chemical storage device. These functionalities are included in the control logic of the load cell which is incorporated into the load cell itself.
    Type: Application
    Filed: July 19, 2006
    Publication date: March 22, 2007
    Inventors: Ashutosh Misra, Benjamin Jurcik, Ravi Laxman
  • Publication number: 20070011561
    Abstract: A data management layer of a layered protocol system and a method of transmitting data. The data management layer including: a cyclic redundancy check generator connected to a retry buffer through a multiplexer; a sequence number generator connected to the retry buffer through the multiplexer; means for generating a sequence number cyclic redundancy check remainder connected to preset inputs of a cyclic redundancy check remainder latch of the cyclic redundancy check generator; an input data bus connected directly to the cyclic redundancy check generator and connected to the retry buffer through the multiplexer; and an output data bus directly connected to the retry buffer.
    Type: Application
    Filed: June 9, 2005
    Publication date: January 11, 2007
    Applicant: International Business Machines Corporation
    Inventors: Shridhar Ambilkar, Girish Kurup, Ashutosh Misra
  • Publication number: 20060271730
    Abstract: A memory has a set of address spaces to which token data is written and read. Each address space has a token status bit. A token generator allocates token data to the memory address spaces. Upon a reset occurring, a logic circuit provides logic “0” to the token generator disabling status bit checking control so that all the tokens can be issued sequentially. New token data is allocated to the address spaces sequentially and the respective status bit is updated or maintained as logic “1”. When all address spaces have been allocated, the logic circuit provides the actual state of the status bit to the token generator to control subsequent allocations.
    Type: Application
    Filed: July 31, 2006
    Publication date: November 30, 2006
    Inventors: Shridhar Narasimha Ambilkar, Girish Gopala Kurup, Ashutosh Misra
  • Publication number: 20060234888
    Abstract: This disclosure discusses cleaning of semiconductor wafers after the Chemical-Mechanical Planarization (CMP) of the wafer during the manufacturing of semiconductor devices. Disclosed is an acidic chemistry for the post-CMP cleaning of wafers containing metal, particularly copper, interconnects. Residual slurry particles, particularly copper or other metal particles, are removed from the wafer surface without significantly etching the metal, leaving deposits on the surface, or imparting significant organic (such as carbon) contamination to the wafer while also protecting the metal from oxidation and corrosion. Additionally, at least one strong chelating agent is present to complex metal ions in solution, facilitating the removal of metal from the dielectric and preventing re-deposition onto the wafer. Using acidic chemistry, it is possible to match the pH of the cleaning solution used after CMP to that of the last slurry used on the wafer surface.
    Type: Application
    Filed: June 9, 2006
    Publication date: October 19, 2006
    Inventors: Ashutosh Misra, Matthew Fisher
  • Patent number: 7098150
    Abstract: This disclosure discusses the forming of gate dielectrics in semi conductor devices, and more specifically to forming thin high-k dielectric films on silicon substrates typically using chemical vapor deposition or atomic layer deposition processes. The current invention forms a high-k dielectric film in a single film-forming step using a vapor phase silicon precursor in conjunction with a liquid phase metal precursor, a nitrogen source and an oxygen source for the deposition of a metal silicon oxy nitride (MSiON) film of desired stochiometry. The vapor phase silicon precursor is not coordinated to a metal allowing independent control over feeding of the metal source and the silicon source. Thus, the M/Si ratio can be easily varied over a wide range.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: August 29, 2006
    Assignee: Air Liquide America L.P.
    Inventors: Ashutosh Misra, Matthew Fisher, Benjamin Jurcik