Patents by Inventor Ashim Dutta

Ashim Dutta 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: 20230197606
    Abstract: Method and resistive structure is provided herein. The resistive structure includes a semiconductor substrate comprising one or more circuit elements and a first interconnect layer disposed on the substrate. The first interconnect layer is between a resistive layer and the semiconductor substrate. A dielectric layer is disposed between the first interconnect layer and the resistive layer. A via extending through the dielectric layer forms an electrical connection between the first interconnect layer and the resistive layer.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 22, 2023
    Inventors: Baozhen LI, Chih-Chao YANG, Ashim DUTTA, Huimei ZHOU
  • Publication number: 20230197506
    Abstract: Embodiments of the present invention are directed to subtractive processing methods and resulting structures for semiconductor devices having decoupled interconnects. In a non-limiting embodiment of the invention, a first conductive line is formed in a dielectric layer. A conductive pillar is formed over the first conductive line and a liner is formed in a trench adjacent to the first conductive line. A portion of the liner extends over the conductive pillar. A lower metal line and a top via are subtractively formed on the liner in the trench.
    Type: Application
    Filed: December 16, 2021
    Publication date: June 22, 2023
    Inventors: Saumya Sharma, Chih-Chao Yang, Tianji Zhou, Ashim Dutta
  • Patent number: 11681213
    Abstract: Techniques for EUV resist pattern transfer using a graded hardmask are provided. In one aspect, a method of patterning is provided. The method includes: forming a graded hardmask on a device stack; depositing a resist onto the graded hardmask; patterning the resist to form a pattern in the resist having at least one feature; modifying at least one surface region to increase an etch rate of the graded hardmask; transferring the pattern from the resist to the graded hardmask; and transferring the pattern from the graded hardmask to at least one underlying layer of the device stack. A device structure formed by the patterning method is also provided.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: June 20, 2023
    Assignee: International Business Machines Corporation
    Inventors: Nelson Felix, Luciana Meli Thompson, Ashim Dutta, Ekmini A. De Silva
  • Patent number: 11682558
    Abstract: A semiconductor structure includes a set of mandrel lines and a set of non-mandrel lines disposed on a hardmask in an alternating pattern. Spacers are disposed between adjacent mandrel lines and non-mandrel lines. The spacers include a composition which exhibits an etch rate greater than an etch rate of the mandrel lines and the non-mandrel lines.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: June 20, 2023
    Assignee: International Business Machines Corporation
    Inventors: Chi-Chun Liu, Ashim Dutta, Nelson Felix, Ekmini Anuja De Silva
  • Publication number: 20230189660
    Abstract: An MRAM device is provided. The MRAM device includes a semiconductor device comprising a bottom contact electrode (BEC), and an MRAM stack formed on the BEC. A width of an upper portion of the BEC is less than a width of the MRAM stack.
    Type: Application
    Filed: December 9, 2021
    Publication date: June 15, 2023
    Inventors: ASHIM DUTTA, SAUMYA SHARMA, TIANJI ZHOU, CHIH-CHAO YANG
  • Publication number: 20230186962
    Abstract: A memory device with modified top electrode contact includes a memory pillar composed of a bottom electrode, a magnetic random-access memory (MRAM) stack above the bottom electrode, and a top electrode above the MRAM stack. A first portion of an encapsulation layer is disposed along opposite sidewalls of the bottom electrode, on opposite sidewalls of the MRAM stack and on opposite sidewalls of a bottom portion of the top electrode, a second portion of the encapsulation layer is located above a second dielectric layer. A metal cap is located above an uppermost surface and opposite sidewalls of a top portion of the top electrode and above an uppermost surface of the first portion of the encapsulation layer. A second conductive interconnect is formed above a top surface of the metal cap wrapping around opposite sidewalls of the first portion of the encapsulation layer and opposite sidewalls of the metal cap.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 15, 2023
    Inventors: Ashim Dutta, Dominik Metzler, Oscar van der Straten, Theodorus E. Standaert
  • Publication number: 20230187284
    Abstract: Embodiments of the present invention are directed to in-situ wafer feedback schemes and systems for providing localized process-based compensation on a semiconductor wafer. In a non-limiting embodiment of the invention, a plurality of test structures are formed on a surface of a semiconductor wafer. The semiconductor wafer is placed under a detection surface of an in-situ feedback tool comprising one or more sensors. The in-situ feedback tool measures a property of each of the plurality of test structures and determines a local condition of the semiconductor wafer for each measured property of the plurality of test structures. A localized process-based compensation is provided on the surface of the semiconductor wafer for each local condition.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 15, 2023
    Inventors: Saumya Sharma, Ruturaj Nandkumar Pujari, Ashim Dutta, Chih-Chao Yang
  • Publication number: 20230189534
    Abstract: An MRAM device is provided. The MRAM device includes a first dielectric cap layer formed on an underlying layer, a second dielectric cap layer formed on the first dielectric cap layer, the first dielectric cap layer including a lower-? material than that of the second dielectric cap layer. The MRAM device also includes a bottom electrode contact (BEC) formed through the first dielectric cap layer and the second dielectric cap layer, an MRAM stack formed on the BEC, and wherein the second dielectric cap layer surrounds an upper portion of the BEC.
    Type: Application
    Filed: December 14, 2021
    Publication date: June 15, 2023
    Inventors: ASHIM DUTTA, MICHAEL RIZZOLO, JON SLAUGHTER, CHIH-CHAO YANG, THEODORUS E. STANDAERT
  • Publication number: 20230180618
    Abstract: Embodiments of the invention include a subtractive top via as a bottom electrode contact for an embedded memory structure. Forming the bottom electrode contact includes depositing a conductive material on an underlayer and etching the conductive material to form an extended via and a conductive pad as an integral unit. The extended via extends from the conductive pad such that the extended via is adjacent to a memory structure, the extended via being formed as a first contact for the memory structure.
    Type: Application
    Filed: December 6, 2021
    Publication date: June 8, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang
  • Publication number: 20230178129
    Abstract: A semiconductor device includes a bottom electrode contact disposed over one or more of a plurality of conductive lines, magnetoresistive random access memory (MRAM) pillars constructed over the bottom electrode contact, an encapsulation layer section disposed between a pair of the MRAM pillars such that an aspect ratio of a tight pitch gap between the pair of the MRAM pillars is reduced, and a dielectric disposed within the encapsulation layer section, wherein the dielectric fills an entirety of a space defined within the encapsulation layer section. The MRAM pillars have a generally rectangular-shaped or cone-shaped configuration and the encapsulation layer section has a generally U-shaped or V-shaped configuration.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 8, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang, Theodorus E. Standaert, Daniel Charles Edelstein
  • Publication number: 20230178431
    Abstract: A first metal layer is deposited on a substrate. The first metal layer is etched to form one or more metal lines and expose portions of the substrate. A second metal layer is deposited on the exposed portions of the substrate between the one or more metal lines. The first metal layer is patterned to form one or more vertical vias. A dielectric layer is deposited on the exposed portions of the substrate between an exposed sidewalls of the first metal layer and an exposed sidewalls of the second metal layer.
    Type: Application
    Filed: December 8, 2021
    Publication date: June 8, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang, Lawrence A. Clevenger, Ruilong Xie
  • Publication number: 20230170266
    Abstract: A system includes a wafer including at least an electronic component and a probe pad including a built-in back-end-of-line (BEOL) interconnect structure to test the electronic component. The electronic component is tested by the probe pad without building full BEOL interconnect circuits on the wafer. The probe pad is aligned with the wafer by using alignment marks. A prober alignment camera is employed to locate the alignment marks.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 1, 2023
    Inventors: Ashim Dutta, Ruturaj Nandkumar Pujari, Saumya Sharma, Chih-Chao Yang
  • Publication number: 20230172073
    Abstract: Embodiments of the invention include a method for fabricating a semiconductor device and the resulting structure. A substrate having an embedded memory area interconnect structure and an embedded non-memory area interconnect structure is provided, the memory area interconnect structure comprising metal interconnects formed in the substrate. A metal line on a metal interconnect of the non-memory area interconnect structure is formed. A first dielectric layer on exposed surfaces of the non-memory area is formed. A hardmask is formed on the dielectric layer. A second dielectric layer is formed on exposed surfaces of the memory area. A bottom metal contact is formed in a trench, a bottom surface of the bottom metal contact on a top surface of a first metal interconnect of the memory area interconnect structure. A memory element stack pillar is formed on the bottom metal contact.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 1, 2023
    Inventors: Ashim Dutta, Lili Cheng, Chih-Chao Yang
  • Publication number: 20230157181
    Abstract: An approach to provide a pillar-type memory device with a bump of a conductive material on a top electrode of the pillar-type memory device. The top electrode is composed of a thin layer of the top electrode material. The bump of the conductive material increases the height of the top electrode after pillar formation for the pillar-type memory device. The pillar-type memory device includes the bump of the conductive material with a semi-sphere-like bump of the conductive metal that is slightly wider than the top electrode of the pillar-type memory device. A contact connects with the bump of the conductive material on the top electrode.
    Type: Application
    Filed: November 17, 2021
    Publication date: May 18, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang
  • Publication number: 20230147958
    Abstract: A high-density resistive random-access memory array with self-aligned bottom electrode contact includes a plurality of electrically conductive structures embedded in an interconnect dielectric material layer, a bottom electrode selectively grown over, and electrically connected to, each of the electrically conductive structures with the bottom electrode above an electrically conductive structure being separated from the bottom electrode above another electrically conductive structure by a first dielectric filling layer, the bottom electrode having a semi-circular shape. The array further includes a resistive random-access memory pillar disposed above the bottom electrode.
    Type: Application
    Filed: November 6, 2021
    Publication date: May 11, 2023
    Inventors: Dexin Kong, Ekmini Anuja De Silva, Ashim Dutta, Daniel Schmidt
  • Publication number: 20230133023
    Abstract: Embodiments disclosed herein include a semiconductor structure. The semiconductor structure may include a semiconductor structure. The semiconductor structure may include an embedded magnetic random access memory (MRAM) array electrically connected between a bottom metal level and a top metal level. The MRAM array may include a first tier with first MRAM cells and first vias above the first MRAM cells, and a second tier with second MRAM cells and second vias below the second MRAM cells.
    Type: Application
    Filed: October 28, 2021
    Publication date: May 4, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang
  • Publication number: 20230136650
    Abstract: Embodiments disclosed herein include a semiconductor structure. The semiconductor structure may include a magnetoresistive random access memory (MRAM) cell with a memory array landing pad contacting a first bottom metal level contact and an MRAM pillar electrically connected to the memory array landing pad. The semiconductor structure may also include a logic interconnect contacting a second bottom metal level contact and a dielectric cap above the MRAM cell and the logic interconnect. The MRAM cell and logic interconnect may be electrically connected to a top metal level through the dielectric cap.
    Type: Application
    Filed: October 28, 2021
    Publication date: May 4, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang
  • Publication number: 20230109077
    Abstract: A semiconductor structure comprises a bottom electrode contact, and a memory device comprising a bottom electrode disposed on the bottom electrode contact, at least one memory element layer disposed on the bottom electrode, and a top electrode disposed on the at least one memory element layer. A bit line contact is disposed on the top electrode and extends around sides of the memory device and of the bottom electrode contact. An encapsulation layer is disposed between the bit line contact and the sides of the memory device and of the bottom electrode contact.
    Type: Application
    Filed: September 24, 2021
    Publication date: April 6, 2023
    Inventors: Lili Cheng, Ashim Dutta, Chih-Chao Yang
  • Patent number: 11621294
    Abstract: A technique relates to an integrated circuit (IC). Pillars of a set of memory elements are formed. A bilayer dielectric is formed between the pillars, the bilayer dielectric having an upper dielectric material formed on a lower dielectric material without requiring an etch of the lower dielectric material prior to forming the upper dielectric material, thereby preventing a void in the bilayer dielectric, the lower dielectric material including one or more flowable dielectric materials.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: April 4, 2023
    Assignee: International Business Machines Corporation
    Inventors: Ashim Dutta, Saumya Sharma, Tianji Zhou, Chih-Chao Yang
  • Publication number: 20230102165
    Abstract: A semiconductor structure comprises a memory device comprising a first electrode, at least one memory element layer disposed on the first electrode, and a second electrode disposed on the at least one memory element layer. An encapsulation layer is disposed around side surfaces of the memory device. The semiconductor structure also comprises a conductive cap layer disposed on a top surface of the encapsulation layer and around a portion of side surfaces of the encapsulation layer. A contact is disposed on the second electrode and extends around the side surfaces of the memory device.
    Type: Application
    Filed: September 24, 2021
    Publication date: March 30, 2023
    Inventors: Ashim Dutta, Chih-Chao Yang