Patents by Inventor Xinshu CAI

Xinshu CAI 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: 10468427
    Abstract: Devices and methods of forming a device are disclosed. A substrate is prepared with a memory region and a capacitor region. Split non-volatile memory (NVM) cell may be formed in the memory region and a capacitor may be formed in a capacitor region. The split NVM cell and the capacitor are formed with the same gate electrode and dielectric layers. The capacitor may be a poly-insulator-poly (PIP) which may include first and second capacitor control gate stacks or capacitor plates. In the case of capacitor control gate stacks, the capacitor is integrated into the device without the need of an additional mask. In the case of capacitor plates, the capacitor is integrated into the device with only one additional mask.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: November 5, 2019
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Xinshu Cai, Shyue Seng Tan
  • Publication number: 20190229122
    Abstract: Devices and methods of forming a device are disclosed. A substrate is prepared with a memory region and a capacitor region. Split non-volatile memory (NVM) cell may be formed in the memory region and a capacitor may be formed in a capacitor region. The split NVM cell and the capacitor are formed with the same gate electrode and dielectric layers. The capacitor may be a poly-insulator-poly (PIP) which may include first and second capacitor control gate stacks or capacitor plates. In the case of capacitor control gate stacks, the capacitor is integrated into the device without the need of an additional mask. In the case of capacitor plates, the capacitor is integrated into the device with only one additional mask.
    Type: Application
    Filed: January 23, 2018
    Publication date: July 25, 2019
    Inventors: Xinshu CAI, Shyue Seng TAN
  • Patent number: 10103156
    Abstract: A device and methods for forming the device are disclosed. The method includes providing a substrate prepared with a memory cell region and forming memory cell pairs in the cell region. The memory cell pair comprises of first and second split gate memory cells. Each memory cell includes a first gate serving as an access gate, a second gate adjacent to the first gate, the second gate serving as a storage gate, a first source/drain (S/D) region adjacent to the first gate and a second S/D region adjacent to the second gate. The method also includes forming silicide contacts on the substrate on the gate conductors and first S/D regions and exposed buried common source lines (SLs) in pick-up regions, such that increasing the displacement distance in the wordline and source line (WLSL) region to an extended displacement distance DE avoids shorting between the first offset access gate conductors and adjacent access gate conductors of the rows of memory cell pairs.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: October 16, 2018
    Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.
    Inventors: Xinshu Cai, Khee Yong Lim, Kiok Boone Elgin Quek
  • Publication number: 20180233509
    Abstract: A device and methods for forming the device are disclosed. The method includes providing a substrate prepared with a memory cell region and forming memory cell pairs in the cell region. The memory cell pair comprises of first and second split gate memory cells. Each memory cell includes a first gate serving as an access gate, a second gate adjacent to the first gate, the second gate serving as a storage gate, a first source/drain (S/D) region adjacent to the first gate and a second S/D region adjacent to the second gate. The method also includes forming silicide contacts on the substrate on the gate conductors and first S/D regions and exposed buried common source lines (SLs) in pick-up regions, such that increasing the displacement distance in the wordline and source line (WLSL) region to an extended displacement distance DE avoids shorting between the first offset access gate conductors and adjacent access gate conductors of the rows of memory cell pairs.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 16, 2018
    Inventors: Xinshu CAI, Khee Yong LIM, Kiok Boone Elgin QUEK
  • Patent number: 10032772
    Abstract: Methods of fabricating integrated circuits and integrated circuits fabricated by those methods are provided. In an exemplary embodiment, a method includes providing a substrate having a first and second device wells, a gate dielectric overlying the first and second device wells, a first gate electrode layer overlying the gate dielectric, and a shallow trench isolation structure between the first and second device wells. An insulating dielectric layer is formed only partially overlying the first gate electrode layer. A second gate electrode material is deposited overlying at least the insulating dielectric layer to form a second gate electrode layer. The layers are patterned to form a second gate structure overlying the second device well. A contact is formed on the second gate electrode layer of the second gate structure with the contact overlying dielectric material of at least one of the insulating dielectric layer or the shallow trench isolation structure.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: July 24, 2018
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Xinshu Cai, Fan Zhang, Danny Pak-Chum Shum
  • Patent number: 10020372
    Abstract: A method of forming a thick EG polysilicon over the FG and resulting device are provided. Embodiments include forming a CG on a substrate; forming an STI between a logic region and the CG; forming a polysilicon EG through the CG and CG HM; forming a polysilicon structure over the logic and STI; forming and overfilling with polysilicon a WL trench through the CG and CG HM, between the EG and STI; forming a buffer oxide in the polysilicon structure over the logic region and part of the STI; recessing the buffer oxide and etching back the polysilicon overfill down the CG HM; forming a second buffer oxide over the EG and logic region; recessing the WL polysilicon; removing the first and second buffer oxides; forming a mask with an opening over a center of the WL, the STI, and a majority of the logic region; and removing exposed polysilicon.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: July 10, 2018
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Khee Yong Lim, Kian Ming Tan, Fangxin Deng, Zhiqiang Teo, Xinshu Cai, Elgin Kiok Boone Quek, Fan Zhang
  • Publication number: 20180082999
    Abstract: Methods of fabricating integrated circuits and integrated circuits fabricated by those methods are provided. In an exemplary embodiment, a method includes providing a substrate having a first and second device wells, a gate dielectric overlying the first and second device wells, a first gate electrode layer overlying the gate dielectric, and a shallow trench isolation structure between the first and second device wells. An insulating dielectric layer is formed only partially overlying the first gate electrode layer. A second gate electrode material is deposited overlying at least the insulating dielectric layer to form a second gate electrode layer. The layers are patterned to form a second gate structure overlying the second device well. A contact is formed on the second gate electrode layer of the second gate structure with the contact overlying dielectric material of at least one of the insulating dielectric layer or the shallow trench isolation structure.
    Type: Application
    Filed: September 19, 2016
    Publication date: March 22, 2018
    Inventors: Xinshu Cai, Fan Zhang, Danny Pak-Chum Shum
  • Patent number: 9825185
    Abstract: Integrated circuits and methods for fabricating integrated circuits with non-volatile memory structures are provided. An exemplary integrated circuit includes a semiconductor substrate having a central semiconductor-on-insulator (SOI) region between first and second non-SOI regions. The substrate includes a semiconductor base in the SOI region and the non-SOI regions, an insulator layer overlying the semiconductor base in the SOI region, and an upper semiconductor layer overlying the insulator layer in the SOI region. The integrated circuit further includes a first conductivity type well formed in the base in the first region and in a first portion of the SOI region, and a second conductivity type well formed in the base in the second region and in a second portion of the SOI region lateral of the first conductivity type well. Also, the integrated circuit includes a non-volatile memory device structure overlying the upper semiconductor layer in the SOI region.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 21, 2017
    Assignee: GLOBALFOUDNRIES SINGAPORE PTE. LTD.
    Inventors: Pinghui Li, Ming Zhu, Xinshu Cai, Fan Zhang, Danny Pak-Chum Shum, Darin Chan
  • Patent number: 9780231
    Abstract: Integrated circuits and methods of producing such integrated circuits are provided. In an exemplary embodiment, an integrated circuit includes a substrate with an active layer overlying a handle layer. A partial buried insulator overlies the handle layer and underlies the active layer, terminates at a buried insulator termination point, and includes an electrically insulating material. A substrate extension is adjacent to the partial buried insulator, where the substrate extension overlies the handle layer and underlies the active layer, and where the substrate extension directly contacts the partial buried insulator at the buried insulator termination point. The substrate extension includes a semiconductive material. A memory gate overlies the active layer.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 3, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Pinghui Li, Ming Zhu, Danny Pak-Chum Shum, Xinshu Cai, Darin Chan
  • Patent number: 9520506
    Abstract: A capacitor and method of forming a capacitor are presented. The capacitor includes a substrate having a capacitor region in which the capacitor is disposed. The capacitor includes first, second and third sub-capacitors (C1, C2 and C3). The C1 comprises a metal oxide semiconductor (MOS) capacitor which includes a gate on the substrate. The gate includes a gate electrode over a gate dielectric. A first C1 plate is served by the gate electrode, a second C1 plate is served by the substrate of the capacitor region and a C1 capacitor dielectric is served by the gate dielectric. The C2 includes a back-end-of-line (BEOL) vertical capacitor disposed in ILD layers with metal levels and via levels. A plurality of metal lines are disposed in the metal levels.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: December 13, 2016
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Laiqiang Luo, Xinshu Cai, Danny Shum, Fan Zhang, Khee Yong Lim, Juan Boon Tan, Shaoqiang Zhang
  • Publication number: 20160190146
    Abstract: Integrated circuits and methods fabricating memory cells and integrated circuits are provided. In one embodiment, a method for fabricating a memory cell includes doping a semiconductor substrate to define a conductive region. The method includes forming a stacked structure over the semiconductor substrate. The stacked structure lies over the conductive region and includes a control gate overlying a floating gate. A source line region is formed adjacent a first side of the stacked structure. The method includes forming a contact over the semiconductor substrate and adjacent a second side of the stacked structure to define an electrical current path from the source line region through the conductive region under the stacked structure to the contact.
    Type: Application
    Filed: December 29, 2014
    Publication date: June 30, 2016
    Inventors: Zufa Zhang, Khee Yong Lim, Xinshu Cai
  • Publication number: 20150028407
    Abstract: A capacitor and method of forming a capacitor are presented. The capacitor includes a substrate having a capacitor region in which the capacitor is disposed. The capacitor includes first, second and third sub-capacitors (C1, C2 and C3). The C1 comprises a metal oxide semiconductor (MOS) capacitor which includes a gate on the substrate. The gate includes a gate electrode over a gate dielectric. A first C1 plate is served by the gate electrode, a second C1 plate is served by the substrate of the capacitor region and a C1 capacitor dielectric is served by the gate dielectric. The C2 includes a back-end-of-line (BEOL) vertical capacitor disposed in ILD layers with metal levels and via levels. A plurality of metal lines are disposed in the metal levels. The metal lines of a metal level are grouped in alternating first and second groups, the first group serves as first C2 plates and second group serves as second.
    Type: Application
    Filed: July 23, 2014
    Publication date: January 29, 2015
    Inventors: Laiqiang LUO, Xinshu CAI, Danny SHUM, Fan ZHANG, Khee Yong LIM, Juan Boon TAN, Shaoqiang ZHANG