Patents by Inventor Amol Ramesh Joshi

Amol Ramesh Joshi 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: 11830942
    Abstract: In an example embodiment, a method comprises: forming first spacers adjacent to a memory cell formed on a substrate, each of the first spacers being formed in direct contact with the substrate, where forming the memory cell includes forming a control gate electrode and a tunnel oxide layer over the substrate and subsequently etching completely at least the control gate electrode and the tunnel oxide layer that are disposed beyond the memory cell; forming an interlayer dielectric layer over the memory cell and the first spacers; forming a contact hole through the interlayer dielectric layer to at least reach the substrate; subsequent to forming the contact hole, forming a second spacer adjacent to one of the first spacers, where a height of the second spacer is greater than a height of the first spacers, the second spacer substantially contacting the substrate and the interlayer dielectric layer; and forming a contact in the contact hole.
    Type: Grant
    Filed: March 4, 2021
    Date of Patent: November 28, 2023
    Assignee: Infineon Technologies LLC
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Publication number: 20220302297
    Abstract: In an example embodiment, a method comprises: forming first spacers adjacent to a memory cell formed on a substrate, each of the first spacers being formed in direct contact with the substrate, where forming the memory cell includes forming a control gate electrode and a tunnel oxide layer over the substrate and subsequently etching completely at least the control gate electrode and the tunnel oxide layer that are disposed beyond the memory cell; forming an interlayer dielectric layer over the memory cell and the first spacers; forming a contact hole through the interlayer dielectric layer to at least reach the substrate; subsequent to forming the contact hole, forming a second spacer adjacent to one of the first spacers, where a height of the second spacer is greater than a height of the first spacers, the second spacer substantially contacting the substrate and the interlayer dielectric layer; and forming a contact in the contact hole.
    Type: Application
    Filed: March 4, 2021
    Publication date: September 22, 2022
    Applicant: Cypress Semiconductor Corporation
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Patent number: 10944000
    Abstract: In an example embodiment, a method comprises: forming first spacers adjacent to a memory cell formed on a substrate, each of the first spacers being formed in direct contact with the substrate, where forming the memory cell includes forming a control gate electrode and a tunnel oxide layer over the substrate and subsequently etching completely at least the control gate electrode and the tunnel oxide layer that are disposed beyond the memory cell; forming an interlayer dielectric layer over the memory cell and the first spacers; forming a contact hole through the interlayer dielectric layer to at least reach the substrate; subsequent to forming the contact hole, forming a second spacer adjacent to one of the first spacers, where a height of the second spacer is greater than a height of the first spacers, the second spacer substantially contacting the substrate and the interlayer dielectric layer; and forming a contact in the contact hole.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: March 9, 2021
    Assignee: Cypress Semiconductor Corporation
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Publication number: 20200212215
    Abstract: In an example embodiment, a method comprises: forming first spacers adjacent to a memory cell formed on a substrate, each of the first spacers being formed in direct contact with the substrate, where forming the memory cell includes forming a control gate electrode and a tunnel oxide layer over the substrate and subsequently etching completely at least the control gate electrode and the tunnel oxide layer that are disposed beyond the memory cell; forming an interlayer dielectric layer over the memory cell and the first spacers; forming a contact hole through the interlayer dielectric layer to at least reach the substrate; subsequent to forming the contact hole, forming a second spacer adjacent to one of the first spacers, where a height of the second spacer is greater than a height of the first spacers, the second spacer substantially contacting the substrate and the interlayer dielectric layer; and forming a contact in the contact hole.
    Type: Application
    Filed: December 3, 2019
    Publication date: July 2, 2020
    Applicant: Cypress Semiconductor Corporation
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Patent number: 10622370
    Abstract: A method for fabricating a memory device with a self-aligned trap layer and rounded active region corners is disclosed. In the present invention, an STI process is performed before any of the charge-trapping and top-level layers are formed. Immediately after the STI process, the sharp corners of the active regions are exposed. Because these sharp corners are exposed at this time, they are available to be rounded through any number of known rounding techniques. Rounding the corners improves the performance characteristics of the memory device. Subsequent to the rounding process, the charge-trapping structure and other layers can be formed by a self-aligned process.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 14, 2020
    Assignee: Monterey Research, LLC
    Inventors: Tim Thurgate, Shenqing Fang, Kuo-Tung Chang, Youseok Suh, Meng Ding, Hidehiko Shiraiwa, Amol Ramesh Joshi, Hapreet Sachar, David Matsumoto, Lovejeet Singh, Chih-Yuh Yang
  • Patent number: 10516044
    Abstract: A memory device includes a number of memory cells and a dielectric layer formed over the memory cells. The memory device also includes contacts formed in the dielectric layer and spacers formed adjacent the side surfaces of the contacts. The spacers may inhibit leakage currents from the contacts.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: December 24, 2019
    Assignee: Cypress Semiconductor Corporation
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Publication number: 20140061771
    Abstract: A memory cell system is provided forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, forming an intermediate layer over the charge trap layer, and forming a second insulator layer with the intermediate layer.
    Type: Application
    Filed: November 11, 2013
    Publication date: March 6, 2014
    Applicants: Spansion, LLC., Advanced Micro Devices, Inc.
    Inventors: Meng Ding, Amol Ramesh Joshi, Lei Xue, Takashi Orimoto, Kuo-Tung Chang
  • Publication number: 20140042514
    Abstract: A memory device includes a number of memory cells and a dielectric layer formed over the memory cells. The memory device also includes contacts formed in the dielectric layer and spacers formed adjacent the side surfaces of the contacts. The spacers may inhibit leakage currents from the contacts.
    Type: Application
    Filed: October 21, 2013
    Publication date: February 13, 2014
    Applicants: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Patent number: 8587049
    Abstract: A memory cell system is provided forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, forming an intermediate layer over the charge trap layer, and forming a second insulator layer with the intermediate layer.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: November 19, 2013
    Assignees: Spansion, LLC, Advanced Micro Devices, Inc.
    Inventors: Meng Ding, Amol Ramesh Joshi, Lei Xue, Takashi Orimoto, Kuo-Tung Chang
  • Patent number: 8564041
    Abstract: A memory device includes a number of memory cells and a dielectric layer formed over the memory cells. The memory device also includes contacts formed in the dielectric layer and spacers formed adjacent the side surfaces of the contacts. The spacers may inhibit leakage currents from the contacts.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: October 22, 2013
    Assignees: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Angela T. Hui, Wenmei Li, Minh Van Ngo, Amol Ramesh Joshi, Kuo-Tung Chang
  • Patent number: 8143661
    Abstract: A memory cell system is provided including a first insulator layer over a semiconductor substrate, a charge trap layer over the first insulator layer, and slot where the charge trap layer includes a second insulator layer having the characteristic of being grown.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: March 27, 2012
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar
  • Patent number: 7995386
    Abstract: Systems, methods, and devices that facilitate applying a predefined negative gate voltage to wordlines adjacent to a selected wordline associated with a memory cell selected during a read or verify operation to facilitate reducing adjacent wordline disturb are presented. A memory component can comprise an optimized operation component that can apply a predefined negative gate voltage to wordlines adjacent to a selected wordline associated with a memory cell selected for a read or verify operation, based at least in part on predefined operation criteria, to facilitate reducing adjacent wordline disturb in the selected memory cell to facilitate reducing a shift in the voltage threshold and maintain a desired operation window. The optimized operation component optionally can include an evaluator component that can facilitate determining whether a negative gate voltage applied to adjacent wordlines is to be adjusted to facilitate reducing adjacent wordline disturb below a predetermined threshold amount.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: August 9, 2011
    Assignee: Spansion LLC
    Inventors: Yuji Mizuguchi, Mark W. Randolph, Darlene Gay Hamilton, Yi He, Zhizheng Liu, Yanxia (Emma) Lin, Xianmin Yi, Gulzar Kathawala, Amol Ramesh Joshi, Kuo-Tung Chang, Edward Franklin Runnion, Sung-Chul Lee, Sung-Yong Chung, Yanxiang Liu, Yu Sun
  • Publication number: 20100128521
    Abstract: Systems, methods, and devices that facilitate applying a predefined negative gate voltage to wordlines adjacent to a selected wordline associated with a memory cell selected during a read or verify operation to facilitate reducing adjacent wordline disturb are presented. A memory component can comprise an optimized operation component that can apply a predefined negative gate voltage to wordlines adjacent to a selected wordline associated with a memory cell selected for a read or verify operation, based at least in part on predefined operation criteria, to facilitate reducing adjacent wordline disturb in the selected memory cell to facilitate reducing a shift in the voltage threshold and maintain a desired operation window. The optimized operation component optionally can include an evaluator component that can facilitate determining whether a negative gate voltage applied to adjacent wordlines is to be adjusted to facilitate reducing adjacent wordline disturb below a predetermined threshold amount.
    Type: Application
    Filed: November 21, 2008
    Publication date: May 27, 2010
    Applicant: SPANSION LLC
    Inventors: Yuji Mizuguchi, Mark W. Randolph, Darlene Gay Hamilton, Yi He, Zhizheng Liu, Yanxia (Emma) Lin, Xianmin Yi, Gulzar Kathawala, Amol Ramesh Joshi, Kuo-Tung Chang, Edward Franklin Runnion, Sung-Chul Lee, Sung-Yong Chung, Yanxiang Liu, Yu Sun
  • Patent number: 7704878
    Abstract: A contact structure in a semiconductor device includes a layer of dielectric material and a via formed through the dielectric material. The contact structure further includes a spacer formed on sidewalls of the via using atomic layer deposition (ALD) and a metal deposited in the via.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: April 27, 2010
    Assignees: Advanced Micro Devices, Inc,, Spansion LLC
    Inventors: Minh Van Ngo, Angela T. Hui, Amol Ramesh Joshi, Wenmei Li, Ning Cheng, Ankur Bhushan Agarwal, Norimitsu Takagi
  • Patent number: 7705390
    Abstract: Methods for fabricating dual bit flash memory devices are provided. Method steps include forming a charge trapping layer overlying a substrate and fabricating two insulating members overlying the charge trapping layer. A polycrystalline silicon layer is provided overlying the charge trapping layer and about sidewalls of the insulating members. Sidewall spacers are formed overlying the polycrystalline silicon layer and about the sidewalls of the insulating members. A portion of the first polycrystalline silicon layer and a first portion of the charge trapping layer are removed. A first insulating layer is conformally deposited overlying the insulating members and the substrate. A gate spacer is formed between the two insulating members and overlying the first insulating layer. The two insulating members are removed and the charge trapping layer is etched to form charge storage nodes. Impurity dopants are implanted into the substrate to form impurity-doped bitline regions within the substrate.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: April 27, 2010
    Assignee: Spansion LLC
    Inventors: Amol Ramesh Joshi, Ning Cheng, Minghao Shen
  • Patent number: 7675104
    Abstract: An integrated circuit memory system that includes: providing a substrate; forming a silicon rich charge storage layer over the substrate; forming a first isolation trench through the silicon rich charge storage layer in a first direction; and forming a second isolation trench through the silicon rich charge storage layer in a second direction.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: March 9, 2010
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Amol Ramesh Joshi, Harpreet Sachar, YouSeok Suh, Shenqing Fang, Chih-Yuh Yang, Lovejeet Singh, David H. Matsumoto, Hidehiko Shiraiwa, Kuo-Tung Chang, Scott A. Bell, Allison Holbrook, Satoshi Torii
  • Publication number: 20080169502
    Abstract: Methods for fabricating dual bit flash memory devices are provided. Method steps include forming a charge trapping layer overlying a substrate and fabricating two insulating members overlying the charge trapping layer. A polycrystalline silicon layer is provided overlying the charge trapping layer and about sidewalls of the insulating members. Sidewall spacers are formed overlying the polycrystalline silicon layer and about the sidewalls of the insulating members. A portion of the first polycrystalline silicon layer and a first portion of the charge trapping layer are removed. A first insulating layer is conformally deposited overlying the insulating members and the substrate. A gate spacer is formed between the two insulating members and overlying the first insulating layer. The two insulating members are removed and the charge trapping layer is etched to form charge storage nodes. Impurity dopants are implanted into the substrate to form impurity-doped bitline regions within the substrate.
    Type: Application
    Filed: March 24, 2008
    Publication date: July 17, 2008
    Inventors: Amol Ramesh Joshi, Ning Cheng, Minghao Shen
  • Publication number: 20080150011
    Abstract: A method for forming an integrated circuit system is provided including forming a substrate having a core region and a periphery region, forming a charge storage stack over the substrate in the core region, forming a gate stack with a stack header having a metal portion over the substrate in the periphery region, and forming a memory system with the stack header over the charge storage stack.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 26, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Simon Siu-Sing Chan, Lei Xue, YouSeok Suh, Amol Ramesh Joshi, Hidehiko Shiraiwa, Harpreet Sachar, Kuo-Tung Chang, Connie Pin Chin Wang, Paul R. Besser, Shenqing Fang, Meng Ding, Takashi Orimoto, Wei Zheng, Fred TK Cheung
  • Publication number: 20080150000
    Abstract: A memory system includes a substrate, forming a first insulator over the substrate, forming a charge trap layer, having a composition for setting a predetermined electrical charge level, over the first insulator, and forming a second insulator over the charge trap layer.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Applicant: SPANSION LLC
    Inventors: YouSeok Suh, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, Shenqing Fang
  • Publication number: 20080142874
    Abstract: A method for forming an integrated circuit system is provided including forming a substrate; forming a stack over the substrate, the stack having a sidewall and formed from a charge trap layer and a semi-conducting layer; and slot plane antenna oxidizing the stack for forming a protection enclosure having a protection layer along the sidewall.
    Type: Application
    Filed: December 16, 2006
    Publication date: June 19, 2008
    Applicants: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Hidehiko Shiraiwa, Takayuki Maruyama, Kuo-Tung Chang, YouSeok Suh, Amol Ramesh Joshi, Harpreet Sachar, Simon Siu-Sing Chan