Patents by Inventor Ranjan Rajoo

Ranjan Rajoo 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: 20230238336
    Abstract: The present disclosure relates to semiconductor structures, and more particularly, to crackstop structures and methods of manufacture. The structure includes: a die matrix comprising a plurality of dies separated by at least one scribe lane; and a crackstop structure comprising at least one line within the at least one scribe lane between adjacent dies of the plurality of dies.
    Type: Application
    Filed: March 28, 2023
    Publication date: July 27, 2023
    Inventors: Ranjan RAJOO, Frank G. KUECHENMEISTER, Dirk BREUER
  • Patent number: 11658128
    Abstract: The embodiments herein relate to packages of semiconductor devices having a shielding element and methods of forming the same. An assembly is provided. The assembly includes a semiconductor chip having a passive component and a package within which the semiconductor chip is positioned in. The package includes a shielding element and a package conductive component, and the package conductive component is electrically coupled with the passive component of the semiconductor chip.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: May 23, 2023
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Ranjan Rajoo, Venkata Narayana Rao Vanukuru
  • Patent number: 11652069
    Abstract: The present disclosure relates to semiconductor structures, and more particularly, to crackstop structures and methods of manufacture. The structure includes: a die matrix comprising a plurality of dies separated by at least one scribe lane; and a crackstop structure comprising at least one line within the at least one scribe lane between adjacent dies of the plurality of dies.
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: May 16, 2023
    Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.
    Inventors: Ranjan Rajoo, Frank G. Kuechenmeister, Dirk Breuer
  • Publication number: 20230056509
    Abstract: The embodiments herein relate to packages of semiconductor devices having a shielding element and methods of forming the same. An assembly is provided. The assembly includes a semiconductor chip having a passive component and a package within which the semiconductor chip is positioned in. The package includes a shielding element and a package conductive component, and the package conductive component is electrically coupled with the passive component of the semiconductor chip.
    Type: Application
    Filed: August 19, 2021
    Publication date: February 23, 2023
    Inventors: RANJAN RAJOO, VENKATA NARAYANA RAO VANUKURU
  • Patent number: 11444045
    Abstract: A semiconductor device is provided that includes a bond pad, an insulating layer, and a bonding structure. The bond pad is in a dielectric layer and the insulating layer is over the bond pad; the insulating layer having an opening over the bond pad formed therein. The bonding structure electrically couples the bond pad in the opening. The bonding structure has a height that at least extends to an upper surface of the insulating layer.
    Type: Grant
    Filed: August 16, 2020
    Date of Patent: September 13, 2022
    Assignee: GlobalFoundries Singapore Pte. Ltd.
    Inventors: Ramasamy Chockalingam, Juan Boon Tan, Xiaodong Li, Kai Chong Chan, Ranjan Rajoo
  • Publication number: 20220181271
    Abstract: The present disclosure relates to semiconductor structures, and more particularly, to crackstop structures and methods of manufacture. The structure includes: a die matrix comprising a plurality of dies separated by at least one scribe lane; and a crackstop structure comprising at least one line within the at least one scribe lane between adjacent dies of the plurality of dies.
    Type: Application
    Filed: December 8, 2020
    Publication date: June 9, 2022
    Inventors: Ranjan RAJOO, Frank G. KUECHENMEISTER, Dirk BREUER
  • Publication number: 20220052000
    Abstract: A semiconductor device is provided that includes a bond pad, an insulating layer, and a bonding structure. The bond pad is in a dielectric layer and the insulating layer is over the bond pad; the insulating layer having an opening over the bond pad formed therein. The bonding structure electrically couples the bond pad in the opening. The bonding structure has a height that at least extends to an upper surface of the insulating layer.
    Type: Application
    Filed: August 16, 2020
    Publication date: February 17, 2022
    Inventors: RAMASAMY CHOCKALINGAM, JUAN BOON TAN, XIAODONG LI, KAI CHONG CHAN, RANJAN RAJOO
  • Patent number: 11244915
    Abstract: A semiconductor device is provided that includes a dielectric layer, a bond pad, a passivation layer and a planar barrier. The bond pad is positioned in the dielectric layer. The passivation layer is positioned over the dielectric layer and has an opening over the bond pad. The planar barrier is positioned on the bond pad.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: February 8, 2022
    Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.
    Inventors: Ramasamy Chockalingam, Juan Boon Tan, Chee Kong Leong, Ranjan Rajoo, Xuesong Rao, Xiaodong Li
  • Publication number: 20210134742
    Abstract: A semiconductor device is provided that includes a dielectric layer, a bond pad, a passivation layer and a planar barrier. The bond pad is positioned in the dielectric layer. The passivation layer is positioned over the dielectric layer and has an opening over the bond pad. The planar barrier is positioned on the bond pad.
    Type: Application
    Filed: October 31, 2019
    Publication date: May 6, 2021
    Inventors: RAMASAMY CHOCKALINGAM, JUAN BOON TAN, CHEE KONG LEONG, RANJAN RAJOO, XUESONG RAO, XIAODONG LI
  • Patent number: 9768089
    Abstract: A semiconductor wafer stack and a method of forming a semiconductor device is disclosed. The method includes providing a wafer stack with first and second wafers bonded together. The wafers include edge and non-edge regions, and at least one of the first and second wafers includes devices formed in the non-edge region. The first wafer serves as the base wafer while the second wafer serves as the top wafer of the wafer stack, where the base wafer is wider than the top wafer, providing a step edge of the wafer stack. An edge protection seal is formed on the wafer stack, where first and second layers are deposited on the wafer stack including at the top wafer and step edge of the wafer stack. The portion of the first and second layers on the step edge of the wafer stack forms the edge protection seal which protects the devices in the wafer stack in subsequent processing.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: September 19, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Ranjan Rajoo, Kai Chong Chan
  • Patent number: 9761561
    Abstract: Semiconductor devices and methods of forming a semiconductor device are disclosed. The device includes a wafer with top and bottom surfaces. The wafer includes edge and non-edge regions. The wafer includes a plurality of devices and partially processed TSV contacts disposed in the non-edge region and a groove disposed at the edge region. The groove enables edges of the wafer to be automatically trimmed off as the wafer is subject to a back-grinding planarization process to expose the TSV contacts in the non-edge region of the wafer.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: September 12, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Ranjan Rajoo, Kai Chong Chan
  • Publication number: 20160343629
    Abstract: A semiconductor wafer stack and a method of forming a semiconductor device is disclosed. The method includes providing a wafer stack with first and second wafers bonded together. The wafers include edge and non-edge regions, and at least one of the first and second wafers includes devices formed in the non-edge region. The first wafer serves as the base wafer while the second wafer serves as the top wafer of the wafer stack, where the base wafer is wider than the top wafer, providing a step edge of the wafer stack. An edge protection seal is formed on the wafer stack, where first and second layers are deposited on the wafer stack including at the top wafer and step edge of the wafer stack. The portion of the first and second layers on the step edge of the wafer stack forms the edge protection seal which protects the devices in the wafer stack in subsequent processing.
    Type: Application
    Filed: August 1, 2016
    Publication date: November 24, 2016
    Inventors: Ranjan RAJOO, Kai Chong CHAN
  • Publication number: 20160276310
    Abstract: Semiconductor devices and methods of forming a semiconductor device are disclosed. The device includes a wafer with top and bottom surfaces. The wafer includes edge and non-edge regions. The wafer includes a plurality of devices and partially processed TSV contacts disposed in the non-edge region and a groove disposed at the edge region. The groove enables edges of the wafer to be automatically trimmed off as the wafer is subject to a back-grinding planarization process to expose the TSV contacts in the non-edge region of the wafer.
    Type: Application
    Filed: March 18, 2015
    Publication date: September 22, 2016
    Inventors: Ranjan RAJOO, Kai Chong CHAN
  • Patent number: 9406577
    Abstract: A semiconductor wafer stack and a method of forming a semiconductor device is disclosed. The method includes providing first and second wafers with top and bottom surfaces. The wafers include edge and non-edge regions, and the first wafer includes devices formed in the non-edge region. A first protection seal may be formed at the edge region of the first wafer. The first and second wafers may further be bonded to form a device stack. The protection seal in the device stack contacts the first and second wafers to form a seal, and protects the devices in subsequent processing.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: August 2, 2016
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Ranjan Rajoo, Kai Chong Chan
  • Publication number: 20140264762
    Abstract: A semiconductor wafer stack and a method of forming a semiconductor device is disclosed. The method includes providing first and second wafers with top and bottom surfaces. The wafers include edge and non-edge regions, and the first wafer includes devices formed in the non-edge region. A first protection seal may be formed at the edge region of the first wafer. The first and second wafers may further be bonded to form a device stack. The protection seal in the device stack contacts the first and second wafers to form a seal, and protects the devices in subsequent processing.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 18, 2014
    Applicant: GLOBAL FOUNDRIES Singapore Pte. Ltd.
    Inventors: Ranjan RAJOO, Kai Chong CHAN
  • Publication number: 20130328209
    Abstract: In an embodiment, a stack arrangement is provided. The stack arrangement may include a semiconductor arrangement, the semiconductor arrangement including a substrate; a via formed through the substrate; and a conductive portion arranged in the via. The stack arrangement may further include an interconnect portion arranged over the via; a bond pad portion arranged between the semiconductor arrangement and the interconnect portion, the bond pad portion may include a bond pad circumferential portion arranged at least partially circumferential with respect to the via and at a first distance away from the conductive portion; and at least one bond pad electrical connection extending from within the bond pad circumferential portion to the conductive portion; wherein the interconnect portion may be arranged away from the conductive portion via the bond pad portion.
    Type: Application
    Filed: February 12, 2010
    Publication date: December 12, 2013
    Applicant: Agency for Science, Technology and Research
    Inventors: Cheryl Sharmani Selvanayagam, Ranjan Rajoo, Xiaowu Zhang
  • Publication number: 20090091025
    Abstract: A method for forming and releasing interconnects by using a dummy substrate. The method comprises applying metallization to the dummy substrate for creating a relatively strong bond between the metallization and the dummy substrate and a weak bond between a first end of each of the interconnects and the metallization; weakly bonding the first ends to the metallization; shaping the interconnects; releasing the weak bond between the metallization and the first ends by using a reduced release force to release the first end of the interconnects from the dummy substrate.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 9, 2009
    Applicant: Agency for Science, Technology and Research
    Inventors: Ee Hua Wong, Ranjan Rajoo, Shoa Siong Lim
  • Publication number: 20070256503
    Abstract: A bend testing apparatus for simulating free vibrational flexing at high speeds and frequencies in a test specimen, said apparatus comprising a cam having a narrow circumferential profile or linear profile wherein at least one portion of the profile of said cam comprises at least one waveform, a specimen holder that holds the test specimen on opposite ends of the test specimen in a default position, a light-weight deformation member operable to deflect at least one point on the test specimen from the default position, a follower with one end in operable contact with the cam and its other end connected to the deformation member, such that a displacement of the follower is according to the profile of the cam, to actuate the deformation member correspondingly and to deflect the at least one point on the test specimen from said default position upon movement of the cam.
    Type: Application
    Filed: April 18, 2006
    Publication date: November 8, 2007
    Inventors: Ee Wong, Simon Seah, Ranjan Rajoo
  • Publication number: 20070114266
    Abstract: A method and device to elongate a solder joint are provided. The method begins by forming an elongator on a first substrate. The elongator comprises an expander and an encapsulant to encapsulate the expander. A solder joint is formed to connect the first substrate to a second substrate. Thereafter, the encapsulant is softened to release the expander from a compressed state to elongate the solder joint. The device to elongate a solder joint comprises a substrate having an elongator formed on it. The elongator includes an expander in a compressed state and an encapsulant to encapsulate the expander.
    Type: Application
    Filed: January 16, 2007
    Publication date: May 24, 2007
    Inventors: Ee Wong, Ranjan Rajoo, Wai Wong, Mahadevan Iyer
  • Patent number: 7178711
    Abstract: A method and device to elongate a solder joint are provided. The method begins by forming an elongator on a first substrate. The elongator comprises an expander and an encapsulant to encapsulate the expander. A solder joint is formed to connect the first substrate to a second substrate. Thereafter, the encapsulant is softened to release the expander from a compressed state to elongate the solder joint. The device to elongate a solder joint comprises a substrate having an elongator formed on it. The elongator includes an expander in a compressed state and an encapsulant to encapsulate the expander.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: February 20, 2007
    Assignees: Agency for Science, Technology and Research, National Univeristy of Singapore, Georgia Tech Research Corporation
    Inventors: Ee Hua Wong, Ranjan Rajoo, Wai Kwan Wong, Mahadevan Krishna Iyer