Patents by Inventor Anshu A. Pradhan

Anshu A. Pradhan 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: 8765596
    Abstract: Material is removed from a substrate surface (e.g., from a bottom portion of a recessed feature on a partially fabricated semiconductor substrate) by subjecting the surface to a plurality of profiling cycles, wherein each profiling cycle includes a net etching operation and a net depositing operation. An etching operation removes a greater amount of material than is being deposited by a depositing operation, thereby resulting in a net material etch-back per profiling cycle. About 2-10 profiling cycles are performed. The profiling cycles are used for removing metal-containing materials, such as diffusion barrier materials, copper line materials, and metal seed materials by PVD deposition and resputter. Profiling with a plurality of cycles removes metal-containing materials without causing microtrenching in an exposed dielectric. Further, overhang is reduced at the openings of the recessed features and sidewall material coverage is improved. Integrated circuit devices having higher reliability are fabricated.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: July 1, 2014
    Assignee: Novellus Systems, Inc.
    Inventors: Anshu A. Pradhan, Robert Rozbicki
  • Patent number: 8764950
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically-insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically-insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: July 1, 2014
    Assignee: View, Inc.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
  • Publication number: 20140177027
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Application
    Filed: October 11, 2013
    Publication date: June 26, 2014
    Applicant: View, Inc.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert T. Rozbicki
  • Patent number: 8758575
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: June 24, 2014
    Assignee: View, Inc.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert T. Rozbicki
  • Publication number: 20140160550
    Abstract: “Smart” controllers for windows having controllable optical transitions are described. Controllers with multiple features can sense and adapt to local environmental conditions. Controllers described herein can be integrated with a building management system (BMS) to greatly enhance the BMS's effectiveness at managing local environments in a building. The controllers may have one, two, three or more functions such as powering a smart window, determining the percent transmittance, size, and/or temperature of a smart window, providing wireless communication between the controller and a separate communication node, etc.
    Type: Application
    Filed: August 15, 2013
    Publication date: June 12, 2014
    Applicant: View, Inc.
    Inventors: Stephen C. Brown, Dhairya Shrivastava, David Walter Groechel, Anshu Pradhan, Gordon Jack, Disha Mehtani, Robert T. Rozbicki
  • Patent number: 8749868
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: June 10, 2014
    Assignee: View, Inc.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
  • Publication number: 20140022621
    Abstract: Electrochromic devices and methods may employ the addition of a defect-mitigating insulating layer which prevents electronically conducting layers and/or electrochromically active layers from contacting layers of the opposite polarity and creating a short circuit in regions where defects form. In some embodiments, an encapsulating layer is provided to encapsulate particles and prevent them from ejecting from the device stack and risking a short circuit when subsequent layers are deposited. The insulating layer may have an electronic resistivity of between about 1 and 108 Ohm-cm. In some embodiments, the insulating layer contains one or more of the following metal oxides: aluminum oxide, zinc oxide, tin oxide, silicon aluminum oxide, cerium oxide, tungsten oxide, nickel tungsten oxide, and oxidized indium tin oxide. Carbides, nitrides, oxynitrides, and oxycarbides may also be used.
    Type: Application
    Filed: February 8, 2013
    Publication date: January 23, 2014
    Applicant: VIEW, INC.
    Inventors: Sridhar K. KAILASAM, Robin FRIEDMAN, Dane GILLASPIE, Anshu A. PRADHAN, Robert ROZBICKI, Disha MEHTANI
  • Patent number: 8582193
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: November 12, 2013
    Assignee: View, Inc.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
  • Publication number: 20130278988
    Abstract: This disclosure provides configurations, methods of use, and methods of fabrication for a bus bar of an optically switchable device. In one aspect, an apparatus includes a substrate and an optically switchable device disposed on a surface of the substrate. The optically switchable device has a perimeter with at least one corner including a first side, a second side, and a first vertex joining the first side and the second side. A first bus bar and a second bus bar are affixed to the optically switchable device and configured to deliver current and/or voltage for driving switching of the device. The first bus bar is proximate to the corner and includes a first arm and a second arm having a configuration that substantially follows the shape of the first side, the first vertex, and the second side of the corner.
    Type: Application
    Filed: April 20, 2012
    Publication date: October 24, 2013
    Applicant: VIEW, INC.
    Inventors: Gordon Jack, Anshu Pradhan, Kaustubh Nadkarni
  • Publication number: 20130271815
    Abstract: Controllers and control methods apply a drive voltage to bus bars of a thin film optically switchable device. The applied drive voltage is provided at a level that drives a transition over the entire surface of the optically switchable device but does not damage or degrade the device. This applied voltage produces an effective voltage at all locations on the face of the device that is within a bracketed range. The upper bound of this range is associated with a voltage safely below the level at which the device may experience damage or degradation impacting its performance in the short term or the long term. At the lower boundary of this range is an effective voltage at which the transition between optical states of the device occurs relatively rapidly. The level of voltage applied between the bus bars is significantly greater than the maximum value of the effective voltage within the bracketed range.
    Type: Application
    Filed: November 20, 2012
    Publication date: October 17, 2013
    Applicant: View, Inc.
    Inventors: Anshu Pradhan, Disha Mehtani, Gordon Jack
  • Patent number: 8449731
    Abstract: Local plasma density, e.g., the plasma density in the vicinity of the substrate, is increased by providing an ion extractor configured to transfer ions and electrons from a first region of magnetically confined plasma (typically a region of higher density plasma) to a second region of plasma (typically a region of lower density plasma). The second region of plasma is preferably also magnetically shaped or confined and resides between the first region of plasma and the substrate. A positively biased conductive member positioned proximate the second region of plasma serves as an ion extractor. A positive bias of about 50-300 V is applied to the ion extractor causing electrons and subsequently ions to be transferred from the first region of plasma to the vicinity of the substrate, thereby forming higher density plasma. Provided methods and apparatus are used for deposition and resputtering.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: May 28, 2013
    Assignee: Novellus Systems, Inc.
    Inventors: Anshu A. Pradhan, Douglas B. Hayden, Ronald L. Kinder, Alexander Dulkin
  • Publication number: 20130107345
    Abstract: Prior electrochromic devices frequently suffer from high levels of defectivity. The defects may be manifest as pin holes or spots where the electrochromic transition is impaired. This is unacceptable for many applications such as electrochromic architectural glass. Improved electrochromic devices with low defectivity can be fabricated by depositing certain layered components of the electrochromic device in a single integrated deposition system. While these layers are being deposited and/or treated on a substrate, for example a glass window, the substrate never leaves a controlled ambient environment, for example a low pressure controlled atmosphere having very low levels of particles. These layers may be deposited using physical vapor deposition.
    Type: Application
    Filed: September 11, 2012
    Publication date: May 2, 2013
    Applicant: VIEW, INC.
    Inventors: Sridhar Kailasam, Robin Friedman, Anshu Pradhan, Robert T. Rozbicki
  • Patent number: 8432603
    Abstract: Prior electrochromic devices frequently suffer from poor reliability and poor performance. Some of the difficulties result from inappropriate design and construction of the devices. In order to improve device reliability two layers of an electrochromic device, the counter electrode layer and the electrochromic layer, can each be fabricated to include defined amounts of lithium. Further, the electrochromic device may be subjected to a multistep thermochemical conditioning operation to improve performance. Additionally, careful choice of the materials and morphology of some components of the electrochromic device provides improvements in performance and reliability. In some devices, all layers of the device are entirely solid and inorganic.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 30, 2013
    Assignee: View, Inc.
    Inventors: Zhongchun Wang, Eric Kurman, Mark Kozlowski, Mike Scobey, Jeremy Dixon, Anshu Pradhan
  • Publication number: 20130003157
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: SOLADIGM, INC.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
  • Publication number: 20120327499
    Abstract: Methods of manufacturing electrochromic windows are described. Insulated glass units (IGU's) are protected, e.g. during handling and shipping, by a protective bumper. The bumper can be custom made using IGU dimension data received from the IGU fabrication tool. The bumper may be made of environmentally friendly materials. Laser isolation configurations and related methods of patterning and/or configuring an electrochromic device on a substrate are described. Edge deletion is used to ensure a good seal between spacer and glass in an IGU and thus better protection of an electrochromic device sealed in the IGU. Configurations for protecting the electrochromic device edge in the primary seal and maximizing viewable area in an electrochromic pane of an IGU are also described.
    Type: Application
    Filed: April 25, 2012
    Publication date: December 27, 2012
    Applicant: SOLADIGM, INC.
    Inventors: Ronald M. Parker, Robert T. Rozbicki, Yashraj Bhatnagar, Abhishek Anant Dixit, Anshu A. Pradhan
  • Publication number: 20120293855
    Abstract: Onboard EC window controllers are described. The controllers are configured in close proximity to the EC window, for example, within the IGU. The controller may be part of a window assembly, which includes an IGU having one or more EC panes, and thus does not have to be matched with the EC window, and installed, in the field. The window controllers described herein have a number of advantages because they are matched to the IGU containing one or more EC devices and their proximity to the EC panes of the window overcomes a number of problems associated with conventional controller configurations.
    Type: Application
    Filed: May 23, 2012
    Publication date: November 22, 2012
    Applicant: SOLADIGM, INC.
    Inventors: Dhairya Shrivastava, Anshu Pradhan, Stephen C. Brown, David Walter Groechel, Robert T. Rozbicki
  • Publication number: 20120275008
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically-insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically-insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 1, 2012
    Applicant: SOLADIGM, INC.
    Inventors: Anshu A. Pradhan, Robert T. Rozbicki
  • Patent number: 8300298
    Abstract: Conventional electrochromic devices frequently suffer from poor reliability and poor performance. Improvements are made using entirely solid and inorganic materials. Electrochromic devices are fabricated by forming an ion conducting electronically insulating interfacial region that serves as an IC layer. In some methods, the interfacial region is formed after formation of an electrochromic and a counter electrode layer. The interfacial region contains an ion conducting electronically insulating material along with components of the electrochromic and/or the counter electrode layer. Materials and microstructure of the electrochromic devices provide improvements in performance and reliability over conventional devices.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: October 30, 2012
    Assignee: Soladigm, Inc.
    Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
  • Patent number: 8298933
    Abstract: A layer of diffusion barrier or seed material is deposited on a semiconductor substrate having a recessed feature. The method may include a series of new deposition cycles, for example, a first net deposition cycle and a second net deposition cycle. The first net deposition cycle includes depositing a first deposited amount of the diffusion barrier or seed material and etching a first etched amount of the diffusion barrier or seed material. The second net deposition cycle including depositing a second deposited amount of the diffusion barrier or seed material and etching a second etched amount of the diffusion barrier or seed material. At least one of the process parameters of the first cycle differs from that of the second allows providing a graded deposition effects to reduce a risk of damaging any under layers and dielectric. A deposited layer of diffusion barrier or seed material is generally more conformal.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: October 30, 2012
    Assignee: Novellus Systems, Inc.
    Inventors: Roey Shaviv, Sanjay Gopinath, Peter Holverson, Anshu A. Pradhan
  • Publication number: 20120239209
    Abstract: “Smart” controllers for windows having controllable optical transitions are described. Controllers with multiple features can sense and adapt to local environmental conditions. Controllers described herein can be integrated with a building management system (BMS) to greatly enhance the BMS's effectiveness at managing local environments in a building. The controllers may have one, two, three or more functions such as powering a smart window, determining the percent transmittance, size, and/or temperature of a smart window, providing wireless communication between the controller and a separate communication node, etc.
    Type: Application
    Filed: March 16, 2011
    Publication date: September 20, 2012
    Applicant: SOLADIGM, INC.
    Inventors: Stephen C. Brown, Dhairya Shrivastava, David Walter Groechel, Anshu Pradhan, Gordon Jack, Disha Mehtani, Robert T. Rozbicki