Patents by Inventor Chit Hwei

Chit Hwei 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: 8021954
    Abstract: A method of manufacture of an integrated circuit system includes: providing a substrate including front-end-of-line circuitry; forming a first group of metal layers including a first finger and a second finger over the substrate utilizing a first design rule, the first group of metal layers being formed without a finger via; forming a second group of metal layers including a first finger, a second finger, and a finger via over the first group of metal layers utilizing a second design rule that is larger than the first design rule; and interconnecting the first group of metal layers with the second group of metal layers to form a capacitor.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: September 20, 2011
    Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.
    Inventors: Shao-fu Sanford Chu, Shaoqing Zhang, Johnny Kok Wai Chew, Chit Hwei Ng
  • Publication number: 20100295153
    Abstract: A method of manufacture of an integrated circuit system includes: providing a substrate including front-end-of-line circuitry; forming a first group of metal layers including a first finger and a second finger over the substrate utilizing a first design rule, the first group of metal layers being formed without a finger via; forming a second group of metal layers including a first finger, a second finger, and a finger via over the first group of metal layers utilizing a second design rule that is larger than the first design rule; and interconnecting the first group of metal layers with the second group of metal layers to form a capacitor.
    Type: Application
    Filed: May 22, 2009
    Publication date: November 25, 2010
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Shao-fu Sanford Chu, Shaoqing Zhang, Johnny Kok Wai Chew, Chit Hwei Ng
  • Publication number: 20100038752
    Abstract: An intra-metal capacitor unit cell comprises a first electrode and a second electrode formed in the same device layer. A dielectric layer separates the electrodes. The first electrode is substantially surrounded by the second electrode. Misalignment between the first and second electrodes does not substantively alter the capacitance of the unit cell.
    Type: Application
    Filed: August 15, 2008
    Publication date: February 18, 2010
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING, LTD.
    Inventors: Chit Hwei NG, Chaw Sing HO, Kerwin KHU, Sanford CHU
  • Patent number: 7323736
    Abstract: A new method of provided for forming in one plane layers of semiconductor material having both high and low dielectric constants. Layers, having selected and preferably non-identical parameters of dielectric constants, are successively deposited interspersed with layers of etch stop material. The layers can be etched, creating openings there-through that can be filled with a layer of choice.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: January 29, 2008
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Pradeep Yelehanka, Sanford Chu, Chit Hwei Ng, Jia Zhen, Purakh Verma
  • 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
  • Publication number: 20060207965
    Abstract: A new method of provided for forming in one plane layers of semiconductor material having both high and low dielectric constants. Layers, having selected and preferably non-identical parameters of dielectric constants, are successively deposited interspersed with layers of etch stop material. The layers can be etched, creating openings there-through that can be filled with a a layer of choice.
    Type: Application
    Filed: May 22, 2006
    Publication date: September 21, 2006
    Inventors: Yelehanka Ramaghandramurthy Pradeep, Sanford Chu, Chit Hwei Ng, Jia Zheng, Purakh Verma
  • Patent number: 7067869
    Abstract: There is a need for adjustable capacitors for use in LC or RC matching networks in micro-circuits. This has been achieved by forming a set of individual capacitors that share a common bottom electrode. The areas of the top electrodes of these individual capacitors are chosen to be in an integral ratio to one another so that they can be combined to produce any capacitance within a range of unit values. For example, if four capacitors whose areas are in the ratio of 5:2:1:1, are provided, then any capacitance in a range of from 1 to 9 can be generated, depending on how the top electrodes are connected. Such connections can be hard-wired within the final wiring level to provide a factory adjustable capacitor or they can be connected through field programmable devices to produce a field programmable capacitor. A process for manufacturing the device is also described.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: June 27, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Wei Hua Cheng, Daniel Yen, Chit Hwei Ng, Marvin Liao
  • Patent number: 7060193
    Abstract: A new method of provided for forming in one plane layers of semiconductor material having both high and low dielectric constants. Layers, having selected and preferably non-identical parameters of dielectric constants, are successively deposited interspersed with layers of etch stop material. The layers can be etched, creating openings there-through that can be filled with a layer of choice.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: June 13, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Pradeep Yelehanka, Sanford Chu, Chit Hwei Ng, Jia Zhen, Purakh Verma
  • Patent number: 6903013
    Abstract: An improved method to deposit, by atomic layer deposition, ALD, a copper barrier and seed layer for electroless copper plating, filling trench and channel or tunnel openings in a damascene process, for the fabrication of interconnects and inductors, has been developed. A process flow outlining the method of the present invention is as follows: (1) formation of trenches and channels, (2) atomic layer deposition of copper barrier and seed, (3) electroless deposition of copper, (4) chemical mechanical polishing back of excess copper, and (5) barrier deposition, SiN, forming copper interconnects and inductors.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: June 7, 2005
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Lap Chan, Sanford Chu, Chit Hwei Ng, Yong Ju, Jia Zhen Zheng
  • Patent number: 6902981
    Abstract: A structure and method of fabrication of a capacitor and other devices by providing a semiconductor structure and providing a top insulating layer and conductive features over the semiconductor structure; forming a first conductive layer over the top insulating layer; patterning the first conductive layer to form at least a capacitor bottom plate and a first portion of the first conductive layer; forming a capacitor dielectric layer over the top insulating layer and the capacitor bottom plate and the first portion of the first conductive layer; forming a second conductive layer over the capacitor dielectric layer; and patterning the second conductive layer to form at least a top plate over the bottom plate and a first section of the second conductive layer on the capacitor dielectric layer. The embodiment can further comprise conductive features in the top insulating layer that can underlie the bottom plate, the first portion or/and the first section.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: June 7, 2005
    Assignee: Chartered Semiconductor Manufacturing LTD
    Inventors: Chit Hwei Ng, Chaw Sing Ho
  • Patent number: 6869884
    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 22, 2002
    Date of Patent: March 22, 2005
    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: 6852605
    Abstract: A method is described to fabricate RF inductor devices on a silicon substrate. Low-k or other dielectric material is deposited and patterned to form inductor lower plate trenches. Trenches are lined with barrier film such as TaN, filled with copper, and excess metal planarized using chemical mechanical polishing (CMP). Second layer of a dielectric material is deposited and patterned to form via-hole/trenches. Via-hole/trench patterns are filled with barrier material, and the dielectric film in between the via-hole/trenches is etched to form a second set of trenches. These trenches are filled with copper and planarized. A third layer of a dielectric film is deposited and patterned to form via-hole/trenches. Via-hole/trenches are then filled with barrier material, and the dielectric film between via-hole/trench patterns etched to form a third set of trenches. These trenches are filled with copper metal and excess metal removed by CMP to form said RF inductor.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: February 8, 2005
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Chit Hwei Ng, Lap Chan, Purakh Verma, Yelehanka Ramachandramurthy Pradeep, Sanford Chu
  • Patent number: 6835631
    Abstract: A method of enhancing inductor performance comprising the following steps. A structure having a first oxide layer formed thereover is provided. A lower low-k dielectric layer is formed over the first oxide layer. A second oxide layer is formed over the lower low-k dielectric layer. The second oxide layer is patterned to form at least one hole there through exposing a portion of the lower low-k dielectric layer. Etching through the exposed portion of the lower low-k dielectric layer and into the lower low-k dielectric layer to from at least one respective air gap within the etched lower low-k dielectric layer. An upper low-k dielectric layer is formed over the patterned second oxide layer. At least one inductor is formed within the upper low-k dielectric layer and over the at least one air gap whereby the performance of the inductor is enhanced.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: December 28, 2004
    Assignee: Chartered Semiconductor Manufacturing Ltd
    Inventors: Zheng Jia Zhen, Sanford Chu, Ng Chit Hwei, Lap Chan, Purakh Raj Verma
  • Patent number: 6821904
    Abstract: In accordance with the objectives of the invention a new method is provided for the creation of layers of gate oxide having an unequal thickness. Active surface regions are defined over the surface of a substrate, a thick layer of gate oxide is grown over the active surface. A selective etch is applied to the thick layer of gate oxide, selectively reducing the thickness of the thick layer of gate oxide to the required thickness of a thin layer of gate oxide. The layer of thick gate oxide is blocked from exposure. N2 atoms are implanted into the exposed surface of the thin layer of oxide, rapid thermal processing is performed and the blocking mask is removed from the surface of the thick layer of gate oxide. A high concentration of nitride has now been provided in the thin layer of gate oxide.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: November 23, 2004
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Yelehanka Ramachandramurthy Pradeep, Sanford Chu, Chit Hwei Ng, Jia Zhen Zheng, Purakh Verma
  • Publication number: 20040229457
    Abstract: An improved method to deposit, by atomic layer deposition, ALD, a copper barrier and seed layer for electroless copper plating, filling trench and channel or tunnel openings in a damascene process, for the fabrication of interconnects and inductors, has been developed. A process flow outlining the method of the present invention is as follows: (1) formation of trenches and channels, (2) atomic layer deposition of copper barrier and seed, (3) electroless deposition of copper, (4) chemical mechanical polishing back of excess copper, and (5) barrier deposition, SiN, forming copper interconnects and inductors.
    Type: Application
    Filed: May 16, 2003
    Publication date: November 18, 2004
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Lap Chan, Sanford Chu, Chit Hwei Ng, Yong Ju, Jia Zhen Zheng
  • Publication number: 20040217440
    Abstract: A method is described to fabricate RF inductor devices on a silicon substrate. Low-k or other dielectric material is deposited and patterned to form inductor lower plate trenches. Trenches are lined with barrier film such as TaN, filled with copper, and excess metal planarized using chemical mechanical polishing (CMP). Second layer of a dielectric material is deposited and patterned to form via-hole/trenches. Via-hole/trench patterns are filled with barrier material, and the dielectric film in between the via-hole/trenches is etched to form a second set of trenches. These trenches are filled with copper and planarized. A third layer of a dielectric film is deposited and patterned to form via-hole/trenches. Via-hole/trenches are then filled with barrier material, and the dielectric film between via-hole/trench patterns etched to form a third set of trenches. These trenches are filled with copper metal and excess metal removed by CMP to form said RF inductor.
    Type: Application
    Filed: May 1, 2003
    Publication date: November 4, 2004
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Chit Hwei Ng, Lap Chan, Purakh Verma, Yelehanka Ramachandramurthy Pradeep, Sanford Chu
  • Patent number: 6780727
    Abstract: Methods for forming a metal-insulator-metal (MIM) capacitor using an organic anti-reflective coating (ARC) are described. The first electrode of the MIM capacitor is formed from a first metal layer. The organic ARC is applied, and the second electrode of the MIM capacitor is formed from a second metal layer. The organic ARC is then removed using a nominal clean technique. Because the organic ARC is removed, the performance of the MIM capacitor is improved. Specifically, the breakdown voltage of the MIM capacitor increases and the leakage current decreases.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: August 24, 2004
    Assignee: Chartered Semiconductor Manufacturing Limited
    Inventors: Ng Chit Hwei, Shao Kai, Bao Guang Wen, Tjoa Tjin Tjin, Sanford Chu
  • Publication number: 20040147087
    Abstract: There is a need for adjustable capacitors for use in LC or RC matching networks in micro-circuits. This has been achieved by forming a set of individual capacitors that share a common bottom electrode. The areas of the top electrodes of these individual capacitors are chosen to be in an integral ratio to one another so that they can be combined to produce any capacitance within a range of unit values. For example, if four capacitors whose areas are in the ratio of 5:2:1:1, are provided, then any capacitance in a range of from 1 to 9 can be generated, depending on how the top electrodes are connected. Such connections can be hard-wired within the final wiring level to provide a factory adjustable capacitor or they can be connected through field programmable devices to produce a field programmable capacitor. A process for manufacturing the device is also described.
    Type: Application
    Filed: January 12, 2004
    Publication date: July 29, 2004
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING LTD.
    Inventors: Wei Hua Cheng, Daniel Yen, Chit Hwei Ng, Marvin Liao
  • Publication number: 20040087098
    Abstract: An improved process for fabricating simultaneously high capacitance, less than 0.13 micron metal-insulator-metal capacitors, metal resistors and metal interconnects, has been developed using single or dual damascene processing. The key advantage is the use of only one additional mask reticle to form both MIM capacitor and resistor, simultaneously. Several current obstacles that exist in BEOL, back end of line, are overcome, namely: (a) the use of two or more photo-masks to make <0.13 um MIM capacitors, (b) undulated copper surfaces, when dielectrics are deposited directly upon it, (c) particles generation concerns during etching, when attempting an etch stop on the bottom MIM plate layers, and finally, (d) dishing during CMP occurs when large copper MIM plates are required, with subsequent capacitance matching problems. The integrated method overcomes the above obstacles and simultaneously forms MIM capacitors, metal resistors and metal interconnects using damascene processing.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 6, 2004
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Chit Hwei Ng, Chaw Sing Ho, Lup San Leong, Shao Kai, Raymond Jacob Joy, Sanford Chu, Sajan Marokkey Raphael
  • Patent number: 6730573
    Abstract: An improved process for fabricating simultaneously high capacitance, less than 0.13 micron metal-insulator-metal capacitors, metal resistors and metal interconnects, has been developed using single or dual damascene processing. The key advantage is the use of only one additional mask reticle to form both MIM capacitor and resistor, simultaneously. Several current obstacles that exist in BEOL, back end of line, are overcome, namely: (a) the use of two or more photo-masks to make <0.13 um MIM capacitors, (b) undulated copper surfaces, when dielectrics are deposited directly upon it, (c) particles generation concerns during etching, when attempting an etch stop on the bottom MIM plate layers, and finally, (d) dishing during CMP occurs when large copper MIM plates are required, with subsequent capacitance matching problems. The integrated method overcomes the above obstacles and simultaneously forms MIM capacitors, metal resistors and metal interconnects using damascene processing.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: May 4, 2004
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Chit Hwei Ng, Chaw Sing Ho, Lup San Leong, Shao Kai, Raymond Jacob Joy, Sanford Chu, Sajan Marokkey Raphael