Patents by Inventor Tapashree Roy

Tapashree Roy 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: 12297367
    Abstract: Embodiments described herein relate to flat optical devices and encapsulation materials for flat optical devices. One or more embodiments include a substrate having a first arrangement of a first plurality of pillars formed thereon. The first arrangement of the first plurality of pillars includes pillars having a height h and a lateral distance d. The first arrangement of the first plurality of pillars includes a gap g corresponding to a distance between adjacent pillars of the first plurality of pillars. An aspect ratio of the gap g to the height h is between about 1:1 and about 1:20. A first adhesion-promoting material is disposed over the first arrangement of the first plurality of pillars. A first encapsulation layer is disposed over the first adhesion-promoting material. The first encapsulation layer fills the gap g between adjacent pillars of the first plurality of pillars. The first encapsulation layer includes a fluoropolymer.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: May 13, 2025
    Assignee: Applied Materials, Inc.
    Inventors: Srobona Sen, Tapashree Roy, Prerna Sonthalia Goradia, Robert Jan Visser
  • Patent number: 12216243
    Abstract: Embodiments described herein relate to flat optical devices and methods of forming flat optical devices. One embodiment includes a substrate having a first arrangement of a first plurality of pillars formed thereon. The first arrangement of the first plurality of pillars includes pillars having a height h and a lateral distance d, and a gap g corresponding to a distance between adjacent pillars of the first plurality of pillars. An aspect ratio of the gap g to the height h is between about 1:1 and about 1:20. A first encapsulation layer is disposed over the first arrangement of the first plurality of pillars. The first encapsulation layer has a refractive index of about 1.0 to about 1.5. The first encapsulation layer, the substrate, and each of the pillars of the first arrangement define a first space therebetween. The first space has a refractive index of about 1.0 to about 1.5.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: February 4, 2025
    Assignee: Applied Materials, Inc.
    Inventors: Ludovic Godet, Tapashree Roy, Prerna Sonthalia Goradia, Srobona Sen, Robert Jan Visser, Nitin Deepak, Tapash Chakraborty
  • Patent number: 12181736
    Abstract: Embodiments of metasurfaces having nanostructures with desired geometric profiles and configurations are provided in the present disclosure. In one embodiment, a metasurface includes a nanostructure formed on a substrate, wherein the nanostructure is cuboidal or cylindrical in shape. In another embodiment, a metasurface includes a plurality of nanostructures on a substrate, wherein each of the nanostructures has a gap greater than 35 nm spaced apart from each other. In yet another embodiment, a metasurface includes a plurality of nanostructures on a substrate, wherein the nanostructures are fabricated from at least one of TiO2, silicon nitride, or amorphous silicon, or GaN or aluminum zinc oxide or any material with refractive index greater than 1.8, and absorption coefficient smaller than 0.001, the substrate is transparent with absorption coefficient smaller than 0.001.
    Type: Grant
    Filed: October 31, 2022
    Date of Patent: December 31, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Tapashree Roy, Wayne McMillan, Rutger Meyer Timmerman Thijssen
  • Patent number: 12050327
    Abstract: An imaging system and a method of manufacturing a metalens array is provided. The imaging system includes a metalens array, and light scattered from an object is split by the metalens array, such that an image is formed in front of an observer. The metalens array is at least partially transparent to visible light, so that the observer can also see the environment. The method of manufacturing the metalens array includes bonding together a plurality of substrates, and dicing the plurality of substrates into metalens arrays. The metalens arrays can be used in the imaging system.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: July 30, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Jinxin Fu, Tapashree Roy, Ludovic Godet, Wayne McMillan, Robert J Visser
  • Publication number: 20240071792
    Abstract: A method includes receiving, by a processing device, first data generated by a first sensor of a substrate processing system. The first data is generated responsive to the first sensor receiving electromagnetic radiation from a substrate held by a robot arm of a transfer chamber in the substrate processing system. The method further includes processing the first data to obtain second data. The second data includes a first indication of performance of the substrate processing system. The method further includes causing, in view of the second data, performance of a corrective actions associated with the substrate processing system.
    Type: Application
    Filed: August 25, 2022
    Publication date: February 29, 2024
    Inventors: Tapashree Roy, Todd Egan, Viswanath Bavigadda, Nitin Gupta
  • Patent number: 11626321
    Abstract: Systems and methods herein are related to the formation of optical devices including stacked optical element layers using silicon wafers, glass, or devices as substrates. The optical elements discussed herein can be fabricated on temporary or permanent substrates. In some examples, the optical devices are fabricated to include transparent substrates or devices including charge-coupled devices (CCD), or complementary metal-oxide semiconductor (CMOS) image sensors, light-emitting diodes (LED), a micro-LED (uLED) display, organic light-emitting diode (OLED) or vertical-cavity surface-emitting laser (VCSELs). The optical elements can have interlayers formed in between optical element layers, where the interlayers can range in thickness from 1 nm to 3 mm.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: April 11, 2023
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Ludovic Godet, Wayne McMillan, Rutger Meyer Timmerman Thijssen, Naamah Argaman, Tapashree Roy, Sage Toko Garrett Doshay
  • Patent number: 11487139
    Abstract: Embodiments of metasurfaces having nanostructures with desired geometric profiles and configurations are provided in the present disclosure. In one embodiment, a metasurface includes a nanostructure formed on a substrate, wherein the nanostructure is cuboidal or cylindrical in shape. In another embodiment, a metasurface includes a plurality of nanostructures on a substrate, wherein each of the nanostructures has a gap greater than 35 nm spaced apart from each other. In yet another embodiment, a metasurface includes a plurality of nanostructures on a substrate, wherein the nanostructures are fabricated from at least one of TiO2, silicon nitride, or amorphous silicon, or GaN or aluminum zinc oxide or any material with refractive index greater than 1.8, and absorption coefficient smaller than 0.001, the substrate is transparent with absorption coefficient smaller than 0.001.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: November 1, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Tapashree Roy, Wayne McMillan, Rutger Meyer Timmerman Thijssen
  • Patent number: 11480712
    Abstract: Embodiments described herein relate to nanostructured trans-reflective filters having sub-wavelength dimensions. In one embodiment, the trans-reflective filter includes a film stack that transmits a filtered light within a range of wavelengths and reflects light not within the first range of wavelengths. The film stack includes a first metal film disposed on a substrate having a first thickness, a first dielectric film disposed on the first metal film having a second thickness, a second metal film disposed on the first dielectric film having a third thickness, and a second dielectric film disposed on the second metal film having a fourth thickness.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: October 25, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Tapashree Roy, Rutger Meyer Timmerman Thijssen, Robert Jan Visser
  • Patent number: 11473191
    Abstract: A method for creating a flat optical structure is disclosed, having steps of providing a substrate, etching at least one nanotrench in the substrate, placing a dielectric material in the at least one nanotrench in the substrate and encapsulating a top of the substrate with a film.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: October 18, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Tapashree Roy, Rutger Meyer Timmerman Thijssen, Ludovic Godet, Jinxin Fu
  • Publication number: 20220064474
    Abstract: Embodiments described herein relate to flat optical devices and encapsulation materials for flat optical devices. One or more embodiments include a substrate having a first arrangement of a first plurality of pillars formed thereon. The first arrangement of the first plurality of pillars includes pillars having a height h and a lateral distance d. The first arrangement of the first plurality of pillars includes a gap g corresponding to a distance between adjacent pillars of the first plurality of pillars. An aspect ratio of the gap g to the height h is between about 1:1 and about 1:20. A first adhesion-promoting material is disposed over the first arrangement of the first plurality of pillars. A first encapsulation layer is disposed over the first adhesion-promoting material. The first encapsulation layer fills the gap g between adjacent pillars of the first plurality of pillars. The first encapsulation layer includes a fluoropolymer.
    Type: Application
    Filed: August 27, 2020
    Publication date: March 3, 2022
    Inventors: Srobona SEN, Tapashree Roy, Prerna Sonthalia Goradia, Robert Jan Visser
  • Patent number: 11001535
    Abstract: Embodiments of the present disclosure generally relate to methods of forming optical devices comprising nanostructures disposed on transparent substrates. A substrate, such as a silicon wafer, is provided as a base for forming an optical device. A transparent layer is disposed on a first surface of the substrate, and a structure layer is disposed on the transparent surface. An etch mask layer is disposed on a second surface of the substrate opposite the first surface, and a window or opening is formed in the etch mask layer to expose a portion of the second surface of the substrate. A plurality of nanostructures is then formed in the structure layer, and a portion of the substrate extending from the window to the transparent layer is removed. A portion of the transparent layer having nanostructures disposed thereon is then detached from the substrate to form an optical device.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 11, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Tapashree Roy, Rutger Meyer Timmerman Thijssen
  • Patent number: 10989840
    Abstract: Embodiments described herein relate to nanostructured trans-reflective filters having sub-wavelength dimensions. In one embodiment, the trans-reflective filter includes a film stack that transmits a filtered light within a range of wavelengths and reflects light not within the first range of wavelengths. The film stack includes a first metal film disposed on a substrate having a first thickness, a first dielectric film disposed on the first metal film having a second thickness, a second metal film disposed on the first dielectric film having a third thickness, and a second dielectric film disposed on the second metal film having a fourth thickness.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: April 27, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Tapashree Roy, Rutger Meyer Timmerman Thijssen, Robert Jan Visser
  • Patent number: 10707118
    Abstract: Systems and methods herein are related to the formation of optical devices including stacked optical element layers using silicon wafers, glass, or devices as substrates. The optical elements discussed herein can be fabricated on temporary or permanent substrates. In some examples, the optical devices are fabricated to include transparent substrates or devices including charge-coupled devices (CCD), or complementary metal-oxide semiconductor (CMOS) image sensors, light-emitting diodes (LED), a micro-LED (uLED) display, organic light-emitting diode (OLED) or vertical-cavity surface-emitting laser (VCSELs). The optical elements can have interlayers formed in between optical element layers, where the interlayers can range in thickness from 1 nm to 3 mm.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: July 7, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Ludovic Godet, Wayne McMillan, Rutger Meyer Timmerman Thijssen, Naamah Argaman, Tapashree Roy, Sage Doshay
  • Patent number: 10690808
    Abstract: Aspects disclosed herein relate to color filters for display devices, and more specifically to color filters for transmitting or reflecting and recycling colors of light in liquid crystal display devices. In one aspect, a metasurface is formed between two polarizers in an LCD device. In another aspect, a metasurface is formed on a white light guide of an LCD device. The metasurface is formed to transmit desired color(s) of light and to reflect undesired color(s) of light back into the light guide to be recycled and passed through the LCD device elsewhere. Using the color filter to recycle reflected colors of light increases the efficiency of the display device, such as the LCD device.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: June 23, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Rutger Meyer Timmerman Thijssen, Robert Jan Visser, Tapashree Roy
  • Patent number: 10324314
    Abstract: An optical device includes a nanostructured transparent dielectric film, which is a Huygens metasurface. The Huygens metasurface imparts a phase change to light propagating through or reflecting from the surface. The phase change can be achieved by means of a resonant interaction between light and the Huygens resonators, resulting in a controllable phase change of 0 to 2? with approximately 100% light transmission characterized by a below 0.1 dielectric loss tangent of delta and with the height of the resonators less than the wavelength of light. In one embodiment, the metasurface includes titanium dioxide, but many materials or stacks of different materials may be used. The optical device is functional throughout the visible spectrum between 380 and 700 nm. The nanostructured transparent dielectric film includes a plurality of Huygens resonators.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: June 18, 2019
    Assignee: UChicago Argonne, LLC
    Inventors: David A. Czaplewski, Daniel Lopez, Tapashree Roy
  • Publication number: 20190128507
    Abstract: Embodiments described herein relate to nanostructured trans-reflective filters having sub-wavelength dimensions. In one embodiment, the trans-reflective filter includes a film stack that transmits a filtered light within a range of wavelengths and reflects light not within the first range of wavelengths. The film stack includes a first metal film disposed on a substrate having a first thickness, a first dielectric film disposed on the first metal film having a second thickness, a second metal film disposed on the first dielectric film having a third thickness, and a second dielectric film disposed on the second metal film having a fourth thickness.
    Type: Application
    Filed: March 15, 2018
    Publication date: May 2, 2019
    Inventors: Tapashree Roy, Rutger Meyer Timmerman Thijssen, Robert Jan Visser
  • Patent number: 9606415
    Abstract: A super-oscillatory lens (10) having a pre-defined pattern to spatially modulate the light beam in amplitude and/or phase which has a blocking element (6) formed integrally with the lens, or as a separate component adjacent to the lens, which is opaque to the light beam to cause diffraction of the light beam around the blocking element and formation of a shadow region (20). The lens and blocking element focus the light beam to form an elongate needle-shaped focus (15) in the shadow region (20). In any application in which it is necessary to scan a small spot over a surface, compared with a conventional objective lens focus the elongate shape of the focus relaxes the requirement on a feedback loop to maintain a constant separation between a scan head and a surface being scanned. The elongate shape is also ideal shape for materials processing applications.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: March 28, 2017
    Assignee: University of Southampton
    Inventors: Nikolay Ivanovich Zheludev, Salatore Savo, Tapashree Roy, Vassili Savinov, Mark Richard Dennis, Edward Thomas Foss Rogers, Jari Juhani Lindberg
  • Publication number: 20150043048
    Abstract: A super-oscillatory lens (10) having a pre-defined pattern to spatially modulate the light beam in amplitude and/or phase which has a blocking element (6) formed integrally with the lens, or as a separate component adjacent to the lens, which is opaque to the light beam to cause diffraction of the light beam around the blocking element and formation of a shadow region (20). The lens and blocking element focus the light beam to form an elongate needle-shaped focus (15) in the shadow region (20). In any application in which it is necessary to scan a small spot over a surface, compared with a conventional objective lens focus the elongate shape of the focus relaxes the requirement on a feedback loop to maintain a constant separation between a scan head and a surface being scanned. The elongate shape is also ideal shape for materials processing applications.
    Type: Application
    Filed: January 18, 2013
    Publication date: February 12, 2015
    Inventors: Nikolay Ivanovich Zheludev, Salatore Savo, Tapashree Roy, Vassili Savinov, Mark Richard Dennis, Edward Thomas Foss Rogers, Jari Juhani Lindberg