Patents by Inventor Sunil Shanker

Sunil Shanker 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: 8129288
    Abstract: Combinatorial plasma enhanced deposition techniques are described, including designating multiple regions of a substrate, providing a precursor to at least a first region of the multiple regions, and providing a plasma to the first region to deposit a first material on the first region formed using the first precursor, wherein the first material is different from a second material formed on a second region of the substrate.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: March 6, 2012
    Assignee: Intermolecular, Inc.
    Inventors: Sunil Shanker, Tony Chiang
  • Publication number: 20110244690
    Abstract: According to various embodiments of the disclosure, an apparatus and method for enhanced deposition and etch techniques is described, including a pedestal, the pedestal having at least two electrodes embedded in the pedestal, a showerhead above the pedestal, a plasma gas source connected to the showerhead, wherein the showerhead is configured to deliver plasma gas to a processing region between the showerhead and the substrate and a power source operably connected to the showerhead and the at least two electrodes with plasma being substantially contained in an area which corresponds with one electrode of the at least two electrodes.
    Type: Application
    Filed: December 9, 2010
    Publication date: October 6, 2011
    Inventors: Sunil Shanker, Tony P. Chiang, Chi-I Lang
  • Publication number: 20110203085
    Abstract: This disclosure provides (a) methods of making an oxide layer (e.g., a dielectric layer) based on titanium oxide, to suppress the formation of anatase-phase titanium oxide and (b) related devices and structures. A metal-insulator-metal (“MIM”) stack is formed using an ozone pretreatment process of a bottom electrode (or other substrate) followed by an ALD process to form a TiO2 dielectric, rooted in the use of an amide-containing precursor. Following the ALD process, an oxidizing anneal process is applied in a manner is hot enough to heal defects in the TiO2 dielectric and reduce interface states between TiO2 and electrode; the anneal temperature is selected so as to not be so hot as to disrupt BEL surface roughness. Further process variants may include doping the titanium oxide, pedestal heating during the ALD process to 275-300 degrees Celsius, use of platinum or ruthenium for the BEL, and plural reagent pulses of ozone for each ALD process cycle.
    Type: Application
    Filed: May 4, 2011
    Publication date: August 25, 2011
    Applicant: INTERMOLECULAR, INC.
    Inventors: Hanhong Chen, Pragati Kumar, Sunil Shanker, Edward Haywood, Sandra Malhotra, Imran Hashim, Nobi Fuchigami, Prashant Phatak, Monica Mathur
  • Patent number: 7968452
    Abstract: This disclosure provides (a) methods of making an oxide layer (e.g., a dielectric layer) based on titanium oxide, to suppress the formation of anatase-phase titanium oxide and (b) related devices and structures. A metal-insulator-metal (“MIM”) stack is formed using an ozone pretreatment process of a bottom electrode (or other substrate) followed by an ALD process to form a TiO2 dielectric, rooted in the use of an amide-containing precursor. Following the ALD process, an oxidizing anneal process is applied in a manner is hot enough to heal defects in the TiO2 dielectric and reduce interface states between TiO2 and electrode; the anneal temperature is selected so as to not be so hot as to disrupt BEL surface roughness. Further process variants may include doping the titanium oxide, pedestal heating during the ALD process to 275-300 degrees Celsius, use of platinum or ruthenium for the BEL, and plural reagent pulses of ozone for each ALD process cycle.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: June 28, 2011
    Assignee: Intermolecular, Inc.
    Inventors: Hanhong Chen, Pragati Kumar, Sunil Shanker, Edward Haywood, Sandra Malhotra, Imran Hashim, Nobi Fuchigami, Prashant Phatak, Monica Mathur
  • Publication number: 20110151136
    Abstract: Methods for depositing high-K dielectrics are described, including depositing a first electrode on a substrate, wherein the first electrode is chosen from the group consisting of platinum and ruthenium, applying an oxygen plasma treatment to the exposed metal to reduce the contact angle of a surface of the metal, and depositing a titanium oxide layer on the exposed metal using at least one of a chemical vapor deposition process and an atomic layer deposition process, wherein the titanium oxide layer comprises at least a portion rutile titanium oxide.
    Type: Application
    Filed: March 3, 2011
    Publication date: June 23, 2011
    Inventors: Xiangxin Rui, Sunil Shanker, Sandra Malhotra, Imran Hashim, Edward Haywood
  • Patent number: 7951683
    Abstract: In-situ semiconductor process that can fill high aspect ratio (typically at least 6:1, for example 7:1 or higher), narrow width (typically sub 0.13 micron, for example 0.1 micron or less) gaps with significantly reduced incidence of voids or weak spots is provided. This deposition part of the process may involve the use of any suitable high density plasma chemical vapor deposition (HDP CVD) chemistry. Prior to etch back, the feature gap is plugged with an etch selectivity layer. The etch back part of the process involves multiple steps including a sputter etch to reduce the top hat formations followed by a reactive plasma etch to open the gap. This method improves gapfill, reduces the use of high cost fluorine-based etching and produces interim gaps with better sidewall profiles and aspect ratios.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: May 31, 2011
    Assignee: Novellus Systems, Inc
    Inventor: Sunil Shanker
  • Patent number: 7927947
    Abstract: Methods for depositing high-K dielectrics are described, including depositing a first electrode on a substrate, wherein the first electrode is chosen from the group consisting of platinum and ruthenium, applying an oxygen plasma treatment to the exposed metal to reduce the contact angle of a surface of the metal, and depositing a titanium oxide layer on the exposed metal using at least one of a chemical vapor deposition process and an atomic layer deposition process, wherein the titanium oxide layer comprises at least a portion rutile titanium oxide.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: April 19, 2011
    Assignee: Intermolecular, Inc.
    Inventors: Xiangxin Rui, Sunil Shanker, Sandra Malhotra, Imran Hashim, Edward Haywood
  • Patent number: 7915139
    Abstract: The present invention meets these needs by providing improved methods of filling gaps. In certain embodiments, the methods involve placing a substrate into a reaction chamber and introducing a vapor phase silicon-containing compound and oxidant into the chamber. Reactor conditions are controlled so that the silicon-containing compound and the oxidant are made to react and condense onto the substrate. The chemical reaction causes the formation of a flowable film, in some instances containing Si—OH, Si—H and Si—O bonds. The flowable film fills gaps on the substrates. The flowable film is then converted into a silicon oxide film, for example by plasma or thermal annealing. The methods of this invention may be used to fill high aspect ratio gaps, including gaps having aspect ratios ranging from 3:1 to 10:1.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: March 29, 2011
    Assignee: Novellus Systems, Inc.
    Inventors: Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Patent number: 7888233
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: February 15, 2011
    Assignee: Novellus Systems, Inc.
    Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Publication number: 20110027960
    Abstract: Embodiments of the current invention include methods of forming a strontium titanate (SrTiO3) film using atomic layer deposition (ALD). More particularly, the method includes forming a plurality of titanium oxide (TiO2) unit films using ALD and forming a plurality of strontium oxide (SrO) unit films using ALD. The combined thickness of the TiO2 and SrO unit films is less than approximately 5 angstroms. The TiO2 and SrO units films are then annealed to form a strontium titanate layer.
    Type: Application
    Filed: June 3, 2010
    Publication date: February 3, 2011
    Inventors: Laura M. Matz, Xiangxin Rui, Xinjian Lei, Sunil Shanker, Moo-Sung Kim, Nobi Fuchigami, Iain Buchanan, Anh Duong, Sandra Malhotra, Imran Hashim
  • Publication number: 20110027617
    Abstract: Embodiments of the current invention include methods of forming a strontium titanate (SrTiO3) film using atomic layer deposition (ALD). More particularly, the method includes forming a plurality of titanium oxide (TiO2) unit films using ALD and forming a plurality of strontium oxide (SrO) unit films using ALD. The combined thickness of the TiO2 and SrO unit films is less than approximately 5 angstroms. The TiO2 and SrO units films are then annealed to form a strontium titanate layer.
    Type: Application
    Filed: June 3, 2010
    Publication date: February 3, 2011
    Inventors: Laura M. Matz, Xiangxin Rui, Xinjian Lei, Sunil Shanker, Moo-Sung Kim, Nobi Fuchigami, Iain Buchanan, Duong Anh, Sandra Malhotra, Imran Hashim
  • Publication number: 20110014359
    Abstract: This disclosure provides (a) methods of making an oxide layer (e.g., a dielectric layer) based on yttrium and titanium to have a high dielectric constant and low leakage characteristic and (b) related devices and structures. An oxide layer having both yttrium and titanium may be fabricated either as an amorphous oxide or as an alternating series of monolayers. In several embodiments, the oxide is characterized by a yttrium contribution to total metal that is specifically controlled. The oxide layer can be produced as the result of a reactive process, if desired, via either a PVD process or, alternatively, via an atomic layer deposition process that employs specific precursor materials to allow for a common process temperature window for both titanium and yttrium reactions.
    Type: Application
    Filed: April 17, 2009
    Publication date: January 20, 2011
    Inventors: Imran Hashim, Indranil De, Tony Chiang, Edward Haywood, Hanhong Chen, Nobi Fuchigami, Pragati Kumar, Sandra Malhotra, Sunil Shanker
  • Publication number: 20100330772
    Abstract: Methods for depositing high-K dielectrics are described, including depositing a first electrode on a substrate, wherein the first electrode is chosen from the group consisting of platinum and ruthenium, applying an oxygen plasma treatment to the exposed metal to reduce the contact angle of a surface of the metal, and depositing a titanium oxide layer on the exposed metal using at least one of a chemical vapor deposition process and an atomic layer deposition process, wherein the titanium oxide layer comprises at least a portion rutile titanium oxide.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: Xiangxin Rui, Sunil Shanker, Sandra Malhotra, Imran Hashim, Edward Haywood
  • Publication number: 20100330269
    Abstract: This disclosure provides (a) methods of making an oxide layer (e.g., a dielectric layer) based on titanium oxide, to suppress the formation of anatase-phase titanium oxide and (b) related devices and structures. A metal-insulator-metal (“MIM”) stack is formed using an ozone pretreatment process of a bottom electrode (or other substrate) followed by an ALD process to form a TiO2 dielectric, rooted in the use of an amide-containing precursor. Following the ALD process, an oxidizing anneal process is applied in a manner is hot enough to heal defects in the TiO2 dielectric and reduce interface states between TiO2 and electrode; the anneal temperature is selected so as to not be so hot as to disrupt BEL surface roughness. Further process variants may include doping the titanium oxide, pedestal heating during the ALD process to 275-300 degrees Celsius, use of platinum or ruthenium for the BEL, and plural reagent pulses of ozone for each ALD process cycle.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: Hanhong Chen, Pragati Kumar, Sunil Shanker, Edward Haywood, Sandra Malhotra, Imran Hashim, Nobi Fuchigami, Prashant Phatak, Monica Mathur
  • Patent number: 7727906
    Abstract: This invention relates to electronic device fabrication for making devices such as semiconductor wafers and resolves the detrimental fluorine loading effect on deposition in the reaction chamber of a HDP CVD apparatus used for forming dielectric layers in high aspect ratio, narrow width recessed features with a repeating dep/etch/dep process. The detrimental fluorine loading effect in the chamber on deposition uniformity is reduced and wafers are provided having less deposition thickness variations by employing the method using a passivation treatment and precoating of the chamber before substrates are processed. In a preferred process, after each wafer of a batch is finished, the passivation steps are repeated. In a further preferred process, after all the wafers of a batch are finished, the passivation and precoat procedure is repeated. A preferred passivation gas is a mixture of hydrogen and oxygen.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: June 1, 2010
    Assignee: Novellus Systems, Inc.
    Inventors: Sunil Shanker, Chi-I Lang, Minh Anh Nguyen, Judy H. Huang
  • Publication number: 20100048419
    Abstract: A combinatorial screening method and system are provided. The combinatorial system and method provide rapid data generation for characterization of phase change material. The characterization data is collected through a multipoint probe card where multiple regions are characterized in a single annealing cycle.
    Type: Application
    Filed: July 16, 2009
    Publication date: February 25, 2010
    Inventors: Imran Hashim, Sandra Malhotra, Ryan Clarke, Sunil Shanker, Yun Wang, Yoram Schwarz
  • Publication number: 20090275210
    Abstract: Combinatorial plasma enhanced deposition techniques are described, including designating multiple regions of a substrate, providing a precursor to at least a first region of the multiple regions, and providing a plasma to the first region to deposit a first material on the first region formed using the first precursor, wherein the first material is different from a second material formed on a second region of the substrate.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 5, 2009
    Inventors: Sunil Shanker, Tony Chiang
  • Publication number: 20090227067
    Abstract: Resistive switching nonvolatile memory elements are provided. A metal-containing layer and an oxide layer for a memory element can be heated using rapid thermal annealing techniques. During heating, the oxide layer may decompose and react with the metal-containing layer. Oxygen from the decomposing oxide layer may form a metal oxide with metal from the metal-containing layer. The resulting metal oxide may exhibit resistive switching for the resistive switching memory elements.
    Type: Application
    Filed: March 9, 2009
    Publication date: September 10, 2009
    Inventors: Pragati Kumar, Sean Barstow, Sunil Shanker, Tony Chiang
  • Patent number: 7582555
    Abstract: The present invention meets these needs by providing improved methods of filling gaps. In certain embodiments, the methods involve placing a substrate into a reaction chamber and introducing a vapor phase silicon-containing compound and oxidant into the chamber. Reactor conditions are controlled so that the silicon-containing compound and the oxidant are made to react and condense onto the substrate. The chemical reaction causes the formation of a flowable film, in some instances containing Si—OH, Si—H and Si—O bonds. The flowable film fills gaps on the substrates. The flowable film is then converted into a silicon oxide film, for example by plasma or thermal annealing. The methods of this invention may be used to fill high aspect ratio gaps, including gaps having aspect ratios ranging from 3:1 to 10:1.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: September 1, 2009
    Assignee: Novellus Systems, Inc.
    Inventors: Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Patent number: 7524735
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: April 28, 2009
    Assignee: Novellus Systems, Inc
    Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker