Patents by Inventor Zhendong Liu

Zhendong Liu 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: 20120258598
    Abstract: A chemical mechanical polishing composition, comprising, as initial components: water; 0.1 to 20 wt % abrasive having an average particle size of 5 to 50 nm; and, 0.001 to 1 wt % of an adamantyl substance according to formula (II): wherein A is selected from N and P; wherein each R8 is independently selected from hydrogen, a saturated or unsaturated C1-15 alkyl group, C6-15 aryl group, C6-15 aralkyl group, C6-15 alkaryl group; and, wherein the anion in formula (II) can be any anion that balances the positive charge on the cation in formula (II).
    Type: Application
    Filed: June 12, 2012
    Publication date: October 11, 2012
    Applicant: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Patent number: 8232208
    Abstract: A chemical mechanical polishing composition, comprising, as initial components: water; 0.1 to 40 wt % abrasive having an average particle size of 5 to 150 nm; 0.001 to 1 wt % of an adamantyl substance according to formula (II); 0 to 1 wt % diquaternary substance according to formula (I); and, 0 to 1 wt % of a quaternary ammonium compound. Also, provided is a method for chemical mechanical polishing using the chemical mechanical polishing composition.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: July 31, 2012
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Publication number: 20120070990
    Abstract: A chemical mechanical polishing slurry composition, comprising, as initial components: water; an abrasive; a halogenated quaternary ammonium compound according to formula (I), wherein R8 is selected from a C1-10 alkyl group and a C1-10 hydroxyalkyl group; wherein X1 is a halide selected from chloride, bromide, iodide and fluoride; wherein R9, R10 and R11 are each independently selected from a saturated or unsaturated C1-10 alkyl group, a C1-10 haloalkyl group, a C6-15 aryl group, a C6-15 haloaryl group, a C6-15 arylalkyl group and a C6-15 haloarylalkyl; and, wherein the anion in formula (I) can be any anion that balances the + charge on the cation in formula (I); and, optionally, a diquaternary substance according to formula (II), wherein each A is independently selected from N and P; wherein R1 is selected from a saturated or unsaturated C1-C15 alkyl group, a C6-C15 aryl group and a C6-C15 aralkyl group; wherein R2, R3, R4, R5, R6 and R7 are each independently selected from selected from a hydrogen, a satura
    Type: Application
    Filed: September 22, 2010
    Publication date: March 22, 2012
    Inventors: Zhendong Liu, Yi Guo, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Publication number: 20120070989
    Abstract: A chemical mechanical polishing composition, comprising, as initial components: water; an abrasive; a diquaternary substance according to formula (I), wherein each X is independently selected from N and P; wherein R1 is selected from a saturated or unsaturated C1-C15 alkyl group, a C6-C15 aryl group and a C6-C15 aralkyl group; wherein R2, R3, R4, R5, R6 and R7 are each independently selected from selected from a hydrogen, a saturated or unsaturated C1-C15 alkyl group, a C6-C15 aryl group, a C6-C15 aralkyl group and a C6-C15 alkaryl group; and, wherein the anion in formula (I) can be any anion or combination of anions that balance the 2+ charge on the cation in formula (I); a derivative of guanidine according to formula (II), wherein R8 is selected from a hydrogen, a saturated or unsaturated C1-C15 alkyl group, a C6-C15 aryl group, a C6-C15 aralkyl group and a C6-C15 alkaryl group; wherein R9, R10, R11 and R12 are each independently selected from a hydrogen, a saturated or unsaturated C1-C15 alkyl group, a C6-
    Type: Application
    Filed: September 20, 2010
    Publication date: March 22, 2012
    Inventors: Zhendong Liu, Yi Guo, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Patent number: 8129280
    Abstract: Substrate devices having tuned work functions and methods of forming thereof are provided. In some embodiments, forming devices on substrates may include depositing a dielectric layer atop a substrate having a conductivity well; depositing a work function layer comprising titanium aluminum or titanium aluminum nitride having a first nitrogen composition atop the dielectric layer; etching the work function layer to selectively remove at least a portion of the work function layer from atop the dielectric layer; depositing a layer comprising titanium aluminum or titanium aluminum nitride having a second nitrogen composition atop the work function layer and the substrate, wherein at least one of the work function layer or the layer comprises nitrogen; etching the layer and the dielectric layer to selectively remove a portion of the layer and the dielectric layer from atop the substrate; and annealing the substrate at a temperature less than about 1500 degrees Celsius.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: March 6, 2012
    Assignee: Applied Materials, Inc.
    Inventors: Rongjun Wang, Xianmin Tang, Dengliang Yang, Zhendong Liu, Srinivas Gandikota
  • Patent number: 8119529
    Abstract: A method for chemical mechanical polishing of a substrate, comprising: providing a substrate, wherein the substrate comprises silicon dioxide; providing a chemical mechanical polishing composition, wherein the chemical mechanical polishing composition comprises: water, an abrasive; a diquaternary cation according to formula (I); and optionally a quaternary alkylammonium compound; providing a chemical mechanical polishing pad; creating dynamic contact at an interface between the chemical mechanical polishing pad and the substrate; and dispensing the chemical mechanical polishing composition onto the chemical mechanical polishing pad at or near the interface between the chemical mechanical polishing pad and the substrate; wherein the chemical mechanical polishing composition has a pH of 2 to 6; wherein the chemical mechanical polishing composition exhibits a silicon dioxide removal rate of at least 1,500 ?/min.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: February 21, 2012
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Yi Guo, Zhendong Liu
  • Publication number: 20120036637
    Abstract: Bed-bound patients are at risk for developing pressure ulcers after lying in the same position on a standard home/hospital bed for an extended period of time. In order to prevent pressure ulcers, patients' bodies need to be repositioned at certain time intervals by other personnel. This involves labor-intensive care, and the friction and shear forces during assisted turning often causes skin damage. The rotating bed enables bed-bound patients to reposition their body easily and frequently, thereby reducing external forces such as shearing forces and friction caused by assisted turning, and most importantly reducing the risk of developing pressure ulcers.
    Type: Application
    Filed: August 13, 2010
    Publication date: February 16, 2012
    Inventors: Hougong Wang, Zhendong Liu
  • Publication number: 20120027954
    Abstract: Methods and apparatus for depositing thin films having high thickness uniformity and low resistivity are provided herein. In some embodiments, a magnetron assembly includes a shunt plate, the shunt plate rotatable about an axis, an inner closed loop magnetic pole coupled to the shunt plate, and an outer closed loop magnetic pole coupled the shunt plate, wherein an unbalance ratio of a magnetic field strength of the outer closed loop magnetic pole to a magnetic field strength of the inner closed loop magnetic pole is less than about 1. In some embodiments, the ratio is about 0.57. In some embodiments, the shunt plate and the outer close loop magnetic pole have a cardioid shape. A method utilizing RF and DC power in combination with the inventive magnetron assembly is also disclosed.
    Type: Application
    Filed: July 25, 2011
    Publication date: February 2, 2012
    Applicant: APPLIED MATERIALS, INC.
    Inventors: ZHENDONG LIU, YONG CAO, XIANMIN TANG, SRINIVAS GANDIKOTA, THANH NGUYEN, MUHAMMAD RASHEED
  • Publication number: 20120001118
    Abstract: The invention provides a chemical mechanical polishing composition for chemical mechanical polishing of a chalcogenide phase change alloy substrate. The composition comprises by weight percent, water, 0.1 to 30 colloidal silica abrasive, at least one polishing agent selected from 0.05 to 5 halogen compound, 0.05 to 5 phthalic acid, 0.05 to 5 phthalic anhydride and salts, derivatives and mixtures thereof. The chemical mechanical polishing composition has a pH of 2 to less than 7.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 5, 2012
    Inventors: Ja-Ho Koo, Kaveri Sawant, Zhendong Liu, Kancharla-Arun Kumar Reddy
  • Publication number: 20120003834
    Abstract: The invention provides a method for chemical mechanical polishing of a substrate. The invention comprises providing a substrate, wherein the substrate comprises a chalcogenide phase change alloy and providing a chemical mechanical polishing composition, wherein the chemical mechanical polishing composition comprises, by weight percent, water, 0.1 to 30 abrasive, at least one polishing agent selected from 0.05 to 5 halogen compound, 0.05 to 5 phthalic acid, 0.05 to 5 phthalic anhydride and salts, derivatives and mixtures thereof and wherein the chemical mechanical polishing composition has a pH of 2 to less than 7. A chemical mechanical polishing pad polishes the substrate with the chemical mechanical polishing pad and the chemical mechanical polishing composition to selectively or non-selectively remove the chalcogenide phase change alloy from the substrate.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 5, 2012
    Inventors: Ja-Ho Koo, Zhendong Liu, Kaveri Sawant, Kancharla-Arun Kumar Reddy
  • Publication number: 20110303960
    Abstract: Embodiments described herein provide a semiconductor device and methods and apparatuses of forming the same. The semiconductor device includes a substrate having a source and drain region and a gate electrode stack on the substrate between the source and drain regions. The gate electrode stack includes a conductive film layer on a gate dielectric layer, a refractory metal nitride film layer on the conductive film layer, a silicon-containing film layer on the refractory metal nitride film layer, and a tungsten film layer on the silicon-containing film layer. In one embodiment, the method includes positioning a substrate within a processing chamber, wherein the substrate includes a source and drain region, a gate dielectric layer between the source and drain regions, and a conductive film layer on the gate dielectric layer.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 15, 2011
    Applicant: APPLIED MATERIALS, INC.
    Inventors: YONG CAO, Xianmin Tang, Srinivas Gandikota, Wei D. Wang, Zhendong Liu, Kevin Moraes, Muhammad M. Rasheed, Thanh X. Nguyen, Ananthkrishna Jupudi
  • Publication number: 20110306211
    Abstract: A chemical mechanical polishing composition, comprising, as initial components: water; 0.1 to 40 wt % abrasive having an average particle size of 5 to 150 nm; 0.001 to 1 wt % of an adamarityl substance according to formula (II); 0 to 1 wt % diquaternary substance according to formula (I); and, 0 to 1 wt % of a quaternary ammonium compound. Also, provided is a method for chemical mechanical polishing using the chemical mechanical polishing composition.
    Type: Application
    Filed: June 15, 2010
    Publication date: December 15, 2011
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Patent number: 8071479
    Abstract: A method for chemical mechanical polishing of a substrate comprising a barrier material in the presence of at least one of an interconnect metal and a low-k dielectric material using a chemical mechanical polishing composition comprising water; 1 to 40 wt % abrasive having an average particle size of ?100 nm; 0.001 to 5 wt % quaternary compound; a material having a formula (I): wherein R is selected from C2-C20 alkyl, C2-C20 aryl, C2-C20 aralkyl and C2-C20 alkaryl; wherein x is an integer from 0 to 20; wherein y is an integer from 0 to 20; wherein x+y?1; and, wherein the chemical mechanical polishing composition has a pH?5.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 6, 2011
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventor: Zhendong Liu
  • Publication number: 20110278165
    Abstract: Apparatus for improved particle reduction are provided herein. In some embodiments, an apparatus may include a process kit shield comprising a one-piece metal body having an upper portion and a lower portion and having an opening disposed through the one-piece metal body, wherein the upper portion includes an opening-facing surface configured to be disposed about and spaced apart from a target of a physical vapor deposition chamber and wherein the opening-facing surface is configured to limit particle deposition on an upper surface of the upper portion of the one-piece metal body during sputtering of a target material from the target of the physical vapor deposition chamber.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 17, 2011
    Applicant: APPLIED MATERIALS, INC.
    Inventors: MUHAMMAD RASHEED, RONGJUN WANG, ZHENDONG LIU, XINYU FU, XIANMIN TANG
  • Publication number: 20110244685
    Abstract: A method for chemical mechanical polishing of a substrate is provided, comprising: providing a substrate, wherein the substrate comprises silicon oxide; providing a chemical mechanical polishing composition, comprising, as initial components: water; an abrasive; and a substance according to formula I wherein R1, R2 and R3 are each independently selected from a C1-4 alky group; providing a chemical mechanical polishing pad with a polishing surface; moving the polishing surface relative to the substrate; dispensing the chemical mechanical polishing composition onto the polishing surface; and, abrading at least a portion of the substrate to polish the substrate; wherein the substance according to formula I included in the chemical mechanical polishing composition provides an enhanced silicon oxide removal rate and an improved polishing defectivity performance; and, wherein at least some of the silicon oxide is removed from the substrate.
    Type: Application
    Filed: March 31, 2010
    Publication date: October 6, 2011
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Patent number: 8025813
    Abstract: A chemical mechanical polishing composition useful for chemical mechanical polishing of a substrate, wherein the substrate comprises a silicon oxide material and a silicon nitride material; and methods of making and using the chemical mechanical polishing composition. The chemical mechanical polishing composition comprises, as initial components: at least one of a first substance and a second substance; wherein the first substance is according to formula I wherein the second substance is according to formula II an abrasive; and water.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: September 27, 2011
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Zhendong Liu, Yi Guo, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Publication number: 20110230048
    Abstract: A method for chemical mechanical polishing of a substrate is provided, comprising: providing a substrate, wherein the substrate comprises polysilicon, silicon oxide and silicon nitride; providing a chemical mechanical polishing composition, comprising, as initial components: water; an abrasive; an alkyl aryl polyether sulfonate compound, wherein the alkyl aryl polyether sulfonate compound has a hydrophobic portion having an alkyl group bound to an aryl ring and a nonionic acyclic hydrophilic portion having 4 to 100 carbon atoms; and a substance according to formula I wherein each of R1, R2, R3, R4, R5, R6 and R7 is a bridging group having a formula ā€”(CH2)nā€”, wherein n is an integer selected from 1 to 10; providing a chemical mechanical polishing pad with a polishing surface; moving the polishing surface relative to the substrate; dispensing the chemical mechanical polishing composition onto the polishing surface; and, abrading at least a portion of the substrate to polish the substrate; wherein at least s
    Type: Application
    Filed: March 16, 2010
    Publication date: September 22, 2011
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Publication number: 20110230049
    Abstract: A method for chemical mechanical polishing of a substrate is provided, comprising: providing a substrate, wherein the substrate comprises polysilicon and at least one of silicon oxide and silicon nitride; providing a chemical mechanical polishing composition, comprising, as initial components: water; an abrasive; and an acyclic organosulfonic acid compound, wherein the acyclic organosulfonic acid compound has an acyclic hydrophobic portion having 6 to 30 carbon atoms and a nonionic acyclic hydrophilic portion having 10 to 300 carbon atoms; providing a chemical mechanical polishing pad with a polishing surface; moving the polishing surface relative to the substrate; dispensing the chemical mechanical polishing composition onto the polishing surface; and, abrading at least a portion of the substrate to polish the substrate; wherein at least some of the polysilicon is removed from the substrate; and, wherein at least some of the at least one of silicon oxide and silicon nitride is removed from the substrate.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 22, 2011
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Publication number: 20110230050
    Abstract: A method for chemical mechanical polishing of a substrate is provided, comprising: providing a substrate, wherein the substrate comprises polysilicon and at least one of silicon oxide and silicon nitride; providing a chemical mechanical polishing composition, comprising, as initial components: water; an abrasive; and an alkyl aryl polyether sulfonate compound, wherein the alkyl aryl polyether sulfonate compound has a hydrophobic portion having an alkyl group bound to an aryl ring and a nonionic acyclic hydrophilic portion having 4 to 100 carbon atoms; providing a chemical mechanical polishing pad with a polishing surface; moving the polishing surface relative to the substrate; dispensing the chemical mechanical polishing composition onto the polishing surface; and, abrading at least a portion of the substrate to polish the substrate; wherein at least some of the polysilicon is removed from the substrate; and, wherein at least some of the at least one of silicon oxide and silicon nitride is removed from the su
    Type: Application
    Filed: March 16, 2010
    Publication date: September 22, 2011
    Inventors: Yi Guo, Zhendong Liu, Kancharla-Arun Kumar Reddy, Guangyun Zhang
  • Patent number: 7981316
    Abstract: The polishing method uses a polishing solution for removing barrier materials in the presence of interconnect metals and dielectrics. The polishing solution comprises, by weight percent, 0.1 to 10 hydrogen peroxide, at least one pH adjusting agent selected from the group consisting of nitric acid, sulfuric acid, hydrochloric acid and phosphoric acid for adjusting a pH level of the polishing solution to less than 3, at least 0.0025 benzotriazole inhibitor for reducing removal rate of the interconnect metals, 0 to 10 surfactant, 0.01 to 10 colloidal silica having an average particle size of less than 50 nm and balance water and incidental impurities. The polishing solution has a tantalum nitride material to copper selectivity of at least 3 to 1 and a tantalum nitride to TEOS selectivity of at least 3 to 1.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: July 19, 2011
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Zhendong Liu, Ross E. Barker, II