Patents by Inventor Sanjay Dabral

Sanjay Dabral 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: 20230299668
    Abstract: Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.
    Type: Application
    Filed: May 24, 2023
    Publication date: September 21, 2023
    Inventors: Sanjay Dabral, David A. Secker, Jun Zhai, Ralf M. Schmitt, Vidhya Ramachandran, Wenjie Mao
  • Patent number: 11735567
    Abstract: Stitched die packaging techniques and structures are described in which reconstituted chips are formed using wafer reconstitution and die-stitching techniques. In an embodiment, a chip includes a reconstituted chip-level back end of the line (BEOL) build-up structure to connect a die set embedded in an inorganic gap fill material.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: August 22, 2023
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Jun Zhai, Kwan-Yu Lai, Kunzhong Hu, Vidhya Ramachandran
  • Patent number: 11735526
    Abstract: Electronic package structures and systems are described in which a 3D interconnect structure is integrated into a package redistribution layer and/or chiplet for power and signal delivery to a die. Such structures may significantly improve input output (IO) density and routing quality for signals, while keeping power delivery feasible.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: August 22, 2023
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Zhitao Cao, Kunzhong Hu, Jun Zhai
  • Patent number: 11728266
    Abstract: Multi-die structures with die-to-die routing are described. In an embodiment, each die is patterned into the same semiconductor substrate, and the dies may be interconnected with die-to-die routing during back-end wafer processing. Partial metallic seals may be formed to accommodate the die-to-die routing, programmable dicing, and various combinations of full metallic seals and partial metallic seals can be formed. This may also be extended to three dimensional structures formed using wafer-on-wafer or chip-on-wafer techniques.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: August 15, 2023
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Jun Zhai, Kunzhong Hu, Raymundo M. Camenforte
  • Patent number: 11699949
    Abstract: Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: July 11, 2023
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, David A. Secker, Jun Zhai, Ralf M. Schmitt, Vidhya Ramachandran, Wenjie Mao
  • Publication number: 20230098000
    Abstract: Increases in current drawn from power supply nodes in a computer system can result in unwanted drops in the voltages of the power supply nodes until power supply circuits can compensate for the increased load. To lessen the effects of increases in load currents, a decoupling circuit that includes a diode may be coupled to the power supply node. During a charge mode, a control circuit applies a current to the diode to store charge in the diode. During a boost mode, the control circuit can couple the diode to the power supply node. When the voltage level of the power supply node begins to drop, the diode can source a current to the power supply node using the previously stored charge. The diode may be directly coupled to the power supply node or be part of a switch-based system that employs multiple diodes to increase the discharge voltage.
    Type: Application
    Filed: September 24, 2021
    Publication date: March 30, 2023
    Inventors: Chi Nung Ni, Sanjay Dabral
  • Publication number: 20230085890
    Abstract: Multi-die structures and methods of fabrication are described. In an embodiment, a multi-die structure includes a first die, a second die, and die-to-die routing connecting the first die to the second die. The die-to-die interconnection may be monolithically integrated as a chip-level die-to-die routing, or external package-level die-to-die routing.
    Type: Application
    Filed: September 23, 2021
    Publication date: March 23, 2023
    Inventors: Sanjay Dabral, Jun Zhai, Jung-Cheng Yeh, Kunzhong Hu, Raymundo Camenforte, Thomas Hoffmann
  • Publication number: 20230052432
    Abstract: Stitched die structures, and methods for interconnecting die are described. In an embodiment, a stitched die structure includes a semiconductor substrate that includes a first die area of a first die and a second die area of a second die separate from the first die area. A back-end-of-the-line (BEOL) build-up structure spans over the first die area and the second die area, and includes a first metallic seal directly over a first peripheral area of the first die area, a second metallic seal directly over a second peripheral area of the second die area, and a die-to-die routing extending through the first metallic seal and the second metallic seal to electrically connect the first die to the second die.
    Type: Application
    Filed: September 12, 2022
    Publication date: February 16, 2023
    Inventors: Sanjay Dabral, Jun Zhai
  • Publication number: 20230040308
    Abstract: Chip sealing structures and methods of manufacture are described. In an embodiment, a chip structure includes a main body area formed of a substrate, a back-end-of-the-line (BEOL) build-up structure spanning over the substrate, and chip edge sidewalls extending from a back surface of the substrate to a top surface of the BEOL build-up structure and laterally surrounding the substrate and the BEOL build-up structure. In accordance with embodiments, the chip structure may further include a conformal sealing layer covering at least a first chip edge sidewall of the chip edge sidewalls and a portion of the top surface of the BEOL build-up structure, and forming a lip around the top surface of the BEOL build-up structure.
    Type: Application
    Filed: August 9, 2021
    Publication date: February 9, 2023
    Inventors: Vidhya Ramachandran, Sanjay Dabral, SivaChandra Jangam, Jun Zhai, Kunzhong Hu
  • Patent number: 11476203
    Abstract: Stitched die structures, and methods for interconnecting die are described. In an embodiment, a stitched die structure includes a semiconductor substrate that includes a first die area of a first die and a second die area of a second die separate from the first die area. A back-end-of-the-line (BEOL) build-up structure spans over the first die area and the second die area, and includes a first metallic seal directly over a first peripheral area of the first die area, a second metallic seal directly over a second peripheral area of the second die area, and a die-to-die routing extending through the first metallic seal and the second metallic seal to electrically connect the first die to the second die.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: October 18, 2022
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Jun Zhai
  • Publication number: 20220293433
    Abstract: Chip sealing designs to accommodate die-to-die communication are described. In an embodiment, a chip structure includes a split metallic seal structure including a lower metallic seal and an upper metallic seal with overlapping metallization layers, and a through seal interconnect navigating through the split metallic seal structure.
    Type: Application
    Filed: August 30, 2021
    Publication date: September 15, 2022
    Inventors: Sanjay Dabral, Chi Nung Ni, Long Huang, SivaChandra Jangam
  • Publication number: 20220285273
    Abstract: Electronic package structures and systems are described in which a 3D interconnect structure is integrated into a package redistribution layer and/or chiplet for power and signal delivery to a die. Such structures may significantly improve input output (IO) density and routing quality for signals, while keeping power delivery feasible.
    Type: Application
    Filed: March 21, 2022
    Publication date: September 8, 2022
    Inventors: Sanjay Dabral, Zhitao Cao, Kunzhong Hu, Jun Zhai
  • Publication number: 20220231687
    Abstract: Multi-chip systems and structures for modular scaling are described. In some embodiments an interfacing bar is utilized to couple adjacent chips. For example, a communication bar may utilized to coupled logic chips, and memory bar may be utilized to couple multiple memory chips to a logic chip.
    Type: Application
    Filed: February 23, 2022
    Publication date: July 21, 2022
    Inventors: Sanjay Dabral, Bahattin Kilic, Jie-Hua Zhao, Kunzhong Hu, Suk-Kyu Ryu
  • Publication number: 20220199517
    Abstract: Multi-die structures with die-to-die routing are described. In an embodiment, each die is patterned into the same semiconductor substrate, and the dies may be interconnected with die-to-die routing during back-end wafer processing. Partial metallic seals may be formed to accommodate the die-to-die routing, programmable dicing, and various combinations of full metallic seals and partial metallic seals can be formed. This may also be extended to three dimensional structures formed using wafer-on-wafer or chip-on-wafer techniques.
    Type: Application
    Filed: December 23, 2020
    Publication date: June 23, 2022
    Inventors: Sanjay Dabral, Jun Zhai, Kunzhong Hu, Raymundo M. Camenforte
  • Patent number: 11309895
    Abstract: Multi-chip systems and structures for modular scaling are described. In some embodiments an interfacing bar is utilized to couple adjacent chips. For example, a communication bar may utilized to coupled logic chips, and memory bar may be utilized to couple multiple memory chips to a logic chip.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: April 19, 2022
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Bahattin Kilic, Jie-Hua Zhao, Kunzhong Hu, Suk-Kyu Ryu
  • Patent number: 11309246
    Abstract: Electronic package structures and systems are described in which a 3D interconnect structure is integrated into a package redistribution layer and/or chiplet for power and signal delivery to a die. Such structures may significantly improve input output (IO) density and routing quality for signals, while keeping power delivery feasible.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: April 19, 2022
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Zhitao Cao, Kunzhong Hu, Jun Zhai
  • Publication number: 20220102280
    Abstract: Structures and methods of forming fine die-to-die interconnect routing are described. In an embodiment, a package includes a package-level RDL than spans across a die set and includes a plurality of die-to-die interconnects connecting contact pads between each die. In an embodiment, the plurality of die-to-die interconnects is embedded within one or more photoimageable organic dielectric layers.
    Type: Application
    Filed: May 14, 2021
    Publication date: March 31, 2022
    Inventors: Sanjay Dabral, Zhitao Cao, Kunzhong Hu
  • Publication number: 20220013504
    Abstract: Stitched die packaging techniques and structures are described in which reconstituted chips are formed using wafer reconstitution and die-stitching techniques. In an embodiment, a chip includes a reconstituted chip-level back end of the line (BEOL) build-up structure to connect a die set embedded in an inorganic gap fill material.
    Type: Application
    Filed: September 24, 2021
    Publication date: January 13, 2022
    Inventors: Sanjay Dabral, Jun Zhai, Kwan-Yu Lai, Kunzhong Hu, Vidhya Ramachandran
  • Publication number: 20220014095
    Abstract: Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.
    Type: Application
    Filed: July 23, 2021
    Publication date: January 13, 2022
    Inventors: Sanjay Dabral, David A. Secker, Jun Zhai, Ralf M. Schmitt, Vidhya Ramachandran, Wenjie Mao
  • Patent number: 11158607
    Abstract: Stitched die packaging techniques and structures are described in which reconstituted chips are formed using wafer reconstitution and die-stitching techniques. In an embodiment, a chip includes a reconstituted chip-level back end of the line (BEOL) build-up structure to connect a die set embedded in an inorganic gap fill material.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: October 26, 2021
    Assignee: Apple Inc.
    Inventors: Sanjay Dabral, Jun Zhai, Kwan-Yu Lai, Kunzhong Hu, Vidhya Ramachandran