Patents by Inventor Jia Zhen Zheng

Jia Zhen Zheng 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: 8304834
    Abstract: An integrated circuit is provided. A gate dielectric and a gate are provided respectively on and over a semiconductor substrate. A junction is formed adjacent the gate dielectric and a shaped spacer is formed around the gate. A spacer is formed under the shaped spacer and a liner is formed under the spacer. A first dielectric layer is formed over the semiconductor substrate, the shaped spacer, the spacer, the liner, and the gate. A second dielectric layer is formed over the first dielectric layer. A local interconnect opening is formed in the second dielectric layer down to the first dielectric layer. The local interconnect opening in the first dielectric layer is opened to expose the junction in the semiconductor substrate and the first gate. The local interconnect openings in the first and second dielectric layers are filled with a conductive material.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: November 6, 2012
    Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.
    Inventors: Pradeep Ramachandramurthy Yelehanka, Tong Qing Chen, Zhi Yong Han, Jia Zhen Zheng, Kelvin Ong, Tian Hao Gu, Syn Kean Cheah
  • Patent number: 8236646
    Abstract: A method for manufacturing an integrated circuit structure includes providing a semiconductor substrate and forming two trenches in the semiconductor substrate to define an active region therebetween. An implanted source region is formed in one of the trenches on one side of the active region. An implanted drain region is formed in the other trench on the other side of the active region. Shallow trench isolations are then formed in the trenches. One or more gates are formed over the active region, and contacts to the implanted source region and the implanted drain region are formed.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: August 7, 2012
    Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.
    Inventors: Tze Ho Simon Chan, Weining Li, Elgin Quek, Jia Zhen Zheng, Pradeep Ramachandramurthy Yelehanka, Tommy Lai
  • Patent number: 7501683
    Abstract: An integrated circuit structure includes providing a semiconductor substrate and forming at least one oxide-nitride-oxide dielectric layer above the semiconductor substrate. At least one implantation is formed into at least one area of the semiconductor substrate beneath the oxide-nitride-oxide dielectric layer subsequent to the formation of the oxide-nitride-oxide dielectric layer.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: March 10, 2009
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Tommy Lai, Pradeep Ramachandramurthy Yelehanka, Jia Zhen Zheng, Weining Li
  • Patent number: 7382027
    Abstract: A CMOS RF device and a method to fabricate said device with low gate contact resistance are described. Conventional MOS transistor is first formed with isolation regions, poly-silicon gate structure, sidewall spacers around poly gate, and implanted source/drain with lightly and heavily doped regions. A silicon dioxide layer such as TEOS is deposited, planarized with chemical mechanical polishing (CMP) to expose the gate and treated with dilute HF etchant to recess the silicon dioxide layer below the surface of the gate. Silicon nitride is then deposited and planarized with CMP and then etched except around the gates, using a oversize poly-silicon gate mask. Inter-level dielectric mask is then deposited, contact holes etched, and contact metal is deposited to form the transistor. During contact hole etch over poly-silicon gate, silicon nitride around the poly gate acts as an etch stop.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: June 3, 2008
    Assignee: Chartered Semiconductor Manufacturing, Ltd.
    Inventors: Purakh Raj Verma, Sanford Chu, Lap Chan, Yelehanka Pradeep, Kai Shao, Jia Zhen Zheng
  • Patent number: 7285804
    Abstract: An integrated circuit structure includes a semiconductor substrate and a horizontal semiconductor fin on top of the semiconductor substrate. An access transistor gate and a thyristor gate are on top of the semiconductor substrate and in contact with the horizontal semiconductor fin. An access transistor is at least a portion of the horizontal semiconductor fin and the access transistor gate. A thyristor is at least a portion of the horizontal semiconductor fin and the thyristor gate, the access transistor is in contact with the thyristor.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: October 23, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Elgin Quek, Jia Zhen Zheng, Pradeep R. Yelehanka, Weining Li
  • Patent number: 7250669
    Abstract: A first method of reducing semiconductor device substrate effects comprising the following steps. O+or O2+are selectively implanted into a silicon substrate to form a silicon-damaged silicon oxide region. One or more devices are formed over the silicon substrate proximate the silicon-damaged silicon oxide region within at least one upper dielectric layer. A passivation layer is formed over the at least one upper dielectric layer. The passivation layer and the at least one upper dielectric layer are patterned to form a trench exposing a portion of the silicon substrate over the silicon-damaged silicon oxide region. The silicon-damaged silicon oxide region is selectively etched to form a channel continuous and contiguous with the trench whereby the channel reduces the substrate effects of the one or more semiconductor devices.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: July 31, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Lap Chan, Sanford Chu, Chit Hwei Ng, Purakh Verma, Jia Zhen Zheng, Johnny Chew, Choon Beng Sia
  • Patent number: 7238971
    Abstract: A lateral heterojunction bipolar transistor (HBT) comprising a semiconductor substrate having having a first insulating layer over the semiconductor substrate. A base trench is formed in a first silicon layer over the first insulating layer to form a collector layer over an exposed portion of the semiconductor substrate and an emitter layer over the first insulating layer. A semiconductive layer is formed on the sidewalls of the base trench to form a collector structure in contact with the collector layer and an emitter structure in contact with the emitter layer. A base structure is formed in the base trench. A plurality of connections is formed through an interlevel dielectric layer to the collector layer, the emitter layer, and the base structure. The base structure preferably is a compound semiconductive material of silicon and at least one of silicon-germanium, silicon-germanium-carbon, and combinations thereof.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: July 3, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Jian Xun Li, Lap Chan, Purakh Raj Verma, Jia Zhen Zheng, Shao-fu Sanford Chu
  • Patent number: 7183590
    Abstract: An integrated circuit structure includes providing a semiconductor substrate and forming a trench therein. A thyristor is formed around the trench and within the semiconductor substrate. The thyristor has at least four layers with three P-N junctions therebetween. A gate for the thyristor is formed within the trench. An access transistor is formed on the semiconductor substrate. An interconnect is formed between the thyristor and the access transistor.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: February 27, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Jia Zhen Zheng, Weining Li, Tze Ho Simon Chan, Pradeep Ramachandramurthy Yelehanka
  • Patent number: 7176094
    Abstract: DPN (decoupled plasma nitridation) is used to improve robustness of ultra thin gate oxides. Conventionally, this is followed by an anneal in pure helium to remove structural defects in the oxide. However, annealing under these conditions has been found to cause a deterioration of the electrical performance of devices. This problem has been overcome by annealing, in a 1:4 oxygen-nitrogen mixture (1,050° C. at about 10 torr) instead of in helium or nitrogen oxide. This results in a gate oxide that is resistant to boron contamination without suffering any loss in its electrical properties.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: February 13, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Dong Zhong, Yun Ling Tan, Chew Hoe Ang, Jia Zhen Zheng
  • Patent number: 7148522
    Abstract: An integrated circuit structure includes a semiconductor substrate and a thyristor formed thereon. The thyristor has at least four layers, with three P-N junctions therebetween. At least two of the layers are formed horizontally and at least two of the layers are formed vertically. A gate is formed adjacent at least one of the vertically formed layers. An access transistor is formed on the semiconductor substrate, and an interconnect is formed between the thyristor and the access transistor.
    Type: Grant
    Filed: December 11, 2004
    Date of Patent: December 12, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Elgin Quek, Pradeep Ramachandramurthy Yelehanka, Jia Zhen Zheng, Tommy Lai, Weining Li
  • Patent number: 7132878
    Abstract: This invention provides a circuit and a method for generating a low-level current using semiconductor charge pumping. The invention provides a means of generating a range of current sources by varying the frequency of a repetitive voltage pulse input signal. Also, this invention utilizes one or many MOSFET devices in order to produce higher levels of current. The current source embodiments of this invention generate very stable current sources with high input impedances.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: November 7, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Tupei Chen, Chew-Hoe Ang, Shyue-Seng Tan, Jia-Zhen Zheng
  • Patent number: 7119005
    Abstract: An integrated circuit is provided. A gate dielectric and a gate are provided respectively on and over a semiconductor substrate. A junction is formed adjacent the gate dielectric and a shaped spacer is formed around the gate. A spacer is formed under the shaped spacer and a liner is formed under the spacer. A first dielectric layer is formed over the semiconductor substrate, the shaped spacer, the spacer, the liner, and the gate. A second dielectric layer is formed over the first dielectric layer. A local interconnect opening is formed in the second dielectric layer down to the first dielectric layer. The local interconnect opening in the first dielectric layer is opened to expose the junction in the semiconductor substrate and the first gate. The local interconnect openings in the first and second dielectric layers are filled with a conductive material.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: October 10, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Pradeep Ramachandramurthy Yelehanka, Tong Qing Chen, Zhi Yong Han, Jia Zhen Zheng, Kelvin Ong, Tian Hao Gu, Syn Kean Cheah
  • Publication number: 20060220110
    Abstract: An integrated circuit structure includes providing a semiconductor substrate and forming at least one oxide-nitride-oxide dielectric layer above the semiconductor substrate. At least one implantation is formed into at least one area of the semiconductor substrate beneath the oxide-nitride-oxide dielectric layer subsequent to the formation of the oxide-nitride-oxide dielectric layer.
    Type: Application
    Filed: May 30, 2006
    Publication date: October 5, 2006
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING LTD.
    Inventors: Tommy Lai, Pradeep Yelehanka, Jia Zhen Zheng, Weining Li
  • Publication number: 20060214185
    Abstract: An integrated circuit structure includes providing a semiconductor substrate and forming a trench therein. A thyristor is formed around the trench and within the semiconductor substrate. The thyristor has at least four layers with three P-N junctions therebetween. A gate for the thyristor is formed within the trench. An access transistor is formed on the semiconductor substrate. An interconnect is formed between the thyristor and the access transistor.
    Type: Application
    Filed: June 6, 2006
    Publication date: September 28, 2006
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING LTD.
    Inventors: Jia Zhen Zheng, Weining Li, Tze Ho Simon Chan, Pradeep Yelehanka
  • Patent number: 7095073
    Abstract: An improved and new process of fabricating high dielectric constant MIM capacitors. These high dielectric constant MIM capacitor met all of the stringent requirements needed for both for both RF and analog circuit applications. For the high dielectric constant MIM capacitor, the metal is comprised of copper electrodes in a dual damascene process. The dielectric constant versus the total thickness of super lattices is controlled by the number of layers either 4/4, 2/2, and 1/1 artificial layers. Hence thickness of the film can be easily controlled. Enhancement of dielectric constant is because of interface. Dielectric constants near 900 can be easily achieved for 250 Angstrom thick super lattices. MBE, molecular beam epitaxy or ALCVD, atomic layer CVD techniques is used for this type layer growth process.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: August 22, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Subramanian Balakumar, Chew Hoe Ang, Jia Zhen Zheng, Paul Proctor
  • Patent number: 7081378
    Abstract: A method for manufacturing an integrated circuit structure includes providing a semiconductor substrate and forming a trench therein. A thyristor is formed around the trench and within the semiconductor substrate. The thyristor has at least four layers with three P-N junctions therebetween. A gate for the thyristor is formed within the trench. An access transistor is formed on the semiconductor substrate. An interconnect is formed between the thyristor and the access transistor.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: July 25, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Jia Zhen Zheng, Weining Li, Tze Ho Simon Chan, Pradeep Ramachandramurthy Yelehanka
  • Patent number: 7067362
    Abstract: A method for manufacturing an integrated circuit structure includes providing a semiconductor substrate and forming at least one oxide-nitride-oxide dielectric layer above the semiconductor substrate. At least one implantation is formed into at least one area of the semiconductor substrate beneath the oxide-nitride-oxide dielectric layer subsequent to the formation of the oxide-nitride-oxide dielectric layer.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: June 27, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Tommy Lai, Pradeep Ramachandramurthy Yelehanka, Jia Zhen Zheng, Weining Li
  • Patent number: 7049201
    Abstract: A heterojunction bipolar transistor (HBT), and manufacturing method therefor, comprising a semiconductor substrate having a collector region, a number of insulating layers over the semiconductor substrate, at least one of the number of insulating layers having a base cavity over the collector region, a base structure of a compound semiconductive material in the base cavity, a window in the insulating layer over the base cavity, an emitter structure in the window, an interlevel dielectric layer, and connections through the interlevel dielectric layer to the base structure, the emitter structure, and the collector region. The base structure and the emitter structure preferably are formed in the same processing chamber.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: May 23, 2006
    Assignee: Chartered Semionductor Manufacturing Ltd.
    Inventors: Purakh Raj Verma, Shao-Fu Sanford Chu, Lap Chan, Jian Xun Li, Jia Zhen Zheng
  • Publication number: 20060103450
    Abstract: This invention provides a circuit and a method for generating a low-level current using semiconductor charge pumping. The invention provides a means of generating a range of current sources by varying the frequency of a repetitive voltage pulse input signal. Also, this invention utilizes one or many MOSFET devices in order to produce higher levels of current. The current source embodiments of this invention generate very stable current sources with high input impedances.
    Type: Application
    Filed: November 18, 2004
    Publication date: May 18, 2006
    Inventors: Tupei Chen, Chew-Hoe Ang, Shyue-Seng Tan, Jia-Zhen Zheng
  • Patent number: 7015101
    Abstract: A method for manufacturing an integrated circuit structure includes providing a semiconductor substrate and forming a gate dielectric layer over the semiconductor substrate. The gate dielectric layer is formed in a plurality of thicknesses in a plurality of devices regions over the semiconductor substrate. A second dielectric layer is formed over at least one of the devices regions. A third dielectric layer is formed over at least a portion of the second dielectric layer. Ion traps are then selectively implanted in portions of the second dielectric layer.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: March 21, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Jia Zhen Zheng, Pradeep Ramachandramurthy Yelehanka, Weining Li