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).
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Patent number: 9164346Abstract: 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, which are in direct contact with one another. 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. In addition to the improved electrochromic devices and methods for fabrication, integrated deposition systems for forming such improved devices are also disclosed.Type: GrantFiled: March 13, 2014Date of Patent: October 20, 2015Assignee: View, Inc.Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
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Publication number: 20150293422Abstract: 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: ApplicationFiled: June 9, 2015Publication date: October 15, 2015Inventors: Anshu A. Pradhan, Disha Mehtani, Gordon Jack
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Patent number: 9140951Abstract: 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: GrantFiled: October 11, 2013Date of Patent: September 22, 2015Assignee: View, Inc.Inventors: Zhongchun Wang, Anshu Pradhan, Robert T. Rozbicki
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Patent number: 9128346Abstract: 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: GrantFiled: May 23, 2012Date of Patent: September 8, 2015Assignee: View, Inc.Inventors: Dhairya Shrivastava, Anshu Pradhan, Stephen C. Brown, David Walter Groechel, Robert T. Rozbicki
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Patent number: 9117884Abstract: 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: GrantFiled: September 14, 2012Date of Patent: August 25, 2015Assignee: Novellus Systems, Inc.Inventors: Roey Shaviv, Sanjay Gopinath, Peter Holverson, Anshu A. Pradhan
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Patent number: 9081247Abstract: 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: GrantFiled: March 13, 2015Date of Patent: July 14, 2015Assignee: View, Inc.Inventors: Anshu A. Pradhan, Disha Mehtani, Gordon Jack
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Publication number: 20150185581Abstract: 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: ApplicationFiled: March 13, 2015Publication date: July 2, 2015Inventors: Anshu A. Pradhan, Disha Mehtani, Gordon Jack
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Publication number: 20150131140Abstract: 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: ApplicationFiled: January 20, 2015Publication date: May 14, 2015Inventors: Sridhar K. KAILASAM, Robin FRIEDMAN, Dane GILLASPIE, Anshu A. PRADHAN, Robert ROZBICKI, Disha MEHTANI
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Patent number: 9030725Abstract: 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: GrantFiled: November 20, 2012Date of Patent: May 12, 2015Assignee: View, Inc.Inventors: Anshu Pradhan, Disha Mehtani, Gordon Jack
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Patent number: 9007674Abstract: 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: GrantFiled: February 8, 2013Date of Patent: April 14, 2015Assignee: View, Inc.Inventors: Sridhar K. Kailasam, Robin Friedman, Dane Gillaspie, Anshu A. Pradhan, Robert Rozbicki, Disha Mehtani
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Publication number: 20150092260Abstract: 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: ApplicationFiled: October 10, 2014Publication date: April 2, 2015Inventors: Ronald M. Parker, Robert T. Rozbicki, Yashraj Bhatnagar, Abhishek Anant Dixit, Anshu A. Pradhan
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Publication number: 20150077831Abstract: Methods, apparatus, and systems for mitigating pinhole defects in optical devices such as electrochromic windows. One method mitigates a pinhole defect in an electrochromic device by identifying the site of the pinhole defect and obscuring the pinhole to make it less visually discernible. In some cases, the pinhole defect may be the result of mitigating a short-related defect.Type: ApplicationFiled: March 13, 2013Publication date: March 19, 2015Inventors: Robin Friedman, Sridhar K. Kailasam, Rao Mulpuri, Ronald M. Parker, Ronald A. Powell, Anshu A. Pradhan, Robert T. Rozbicki, Vinod Khosla
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Publication number: 20150070745Abstract: The embodiments herein relate to methods for controlling an optical transition in an optically switchable device, and optically switchable devices configured to perform such methods. In various embodiments, non-optical (e.g., electrical) feedback is used to help control an optical transition. The feedback may be used for a number of different purposes. In many implementations, the feedback is used to control an ongoing optical transition.Type: ApplicationFiled: September 17, 2014Publication date: March 12, 2015Inventor: Anshu A. Pradhan
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Publication number: 20150060264Abstract: 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: ApplicationFiled: November 7, 2014Publication date: March 5, 2015Inventors: Mark Kozlowski, Eric Kurman, Zhongchun Wang, Mike Scobey, Jeremy Dixon, Anshu Pradhan, Robert Rozbicki
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Publication number: 20150049378Abstract: 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: ApplicationFiled: August 26, 2014Publication date: February 19, 2015Inventors: Dhairya Shrivastava, Anshu A. Pradhan, Stephen C. Brown, David Walter Groechel, Robert T. Rozbicki
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Publication number: 20150002919Abstract: Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage.Type: ApplicationFiled: June 28, 2013Publication date: January 1, 2015Inventors: Gordon Jack, Anshu Pradhan
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Publication number: 20140313561Abstract: 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, which are in direct contact with one another. 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. In addition to the improved electrochromic devices and methods for fabrication, integrated deposition systems for forming such improved devices are also disclosed.Type: ApplicationFiled: March 13, 2014Publication date: October 23, 2014Applicant: View, Inc.Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki
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Patent number: 8864321Abstract: A controller or control method may be designed or configured to operate without information about the current temperature of the device and/or the device's environment. Further, in some cases, the controller or control method is designed or configured to control transition of an optical device to an intermediated state between two end states. For example, the controller may be configured to control a transition to a state of transmissivity that is intermediate between two end states of transmissivity. In such case, the device has three or more stable states of transmissivity.Type: GrantFiled: December 2, 2011Date of Patent: October 21, 2014Assignee: View, Inc.Inventors: Disha Mehtani, Gordon Jack, Anshu Pradhan
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Publication number: 20140182125Abstract: This disclosure provides systems, methods, and apparatus for tempering or chemically strengthening glass substrates having electrochromic devices fabricated thereon. In one aspect, an electrochromic device is fabricated on a glass substrate. The glass substrate is then tempered or chemically strengthened. The disclosed methods may reduce or prevent potential issues that the electrochromic device may experience during the tempering or the chemical strengthening processes, including the loss of charge carrying ions from the device, redistribution of charge carrying ions in the device, modification of the morphology of materials included in the device, modification of the oxidation state of materials included in the device, and the formation of an interfacial region between the electrochromic layer and the counter electrode layer of the device that impacts the performance of the device.Type: ApplicationFiled: December 20, 2013Publication date: July 3, 2014Applicant: VIEW, INC.Inventors: Robert T. Rozbicki, Anshu Pradhan
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Patent number: 8764951Abstract: 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: GrantFiled: June 11, 2010Date of Patent: July 1, 2014Assignee: View, Inc.Inventors: Zhongchun Wang, Anshu Pradhan, Robert Rozbicki