Patents by Inventor Chang-Tzu Wang

Chang-Tzu Wang 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: 10236285
    Abstract: A semiconductor device includes a semiconductor substrate and a pair of first well regions formed in the semiconductor substrate, wherein the pair of first well regions have a first conductivity type and are separated by at least one portion of the semiconductor substrate. The semiconductor device also includes a first doping region formed in a portion of at least one portion of the semiconductor substrate separating the pair of first well regions, and a pair of second doping regions, respectively formed in one of the pair of first well regions, having the first conductivity type. Further, the semiconductor device includes a pair of insulating layers, respectively formed over a portion of the semiconductor substrate to cover a portion of the first doped region and one of the pair of second doping regions.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: March 19, 2019
    Assignee: MEDIATEK INC.
    Inventors: Chien-Kai Huang, Yuan-Fu Chung, Bo-Shih Huang, Chang-Tzu Wang
  • Patent number: 9947659
    Abstract: The invention provides a semiconductor device. The semiconductor device includes a fin field effect transistor (finFET) array including finFET units. Each of the finFET units includes a substrate having a fin along a first direction. A first metal strip pattern and a second metal strip pattern are formed on the fin, extending along a second direction that is different from the first direction. The first and second metal strip patterns are conformally formed on opposite sidewalls and a top surface of the fin, respectively. A first contact and a second contact are formed on the fin. The first and second metal strip patterns are disposed between the first and second contacts. A first dummy contact is formed on the fin, sandwiched between the first and second metal strip patterns.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: April 17, 2018
    Assignee: MEDIATEK INC.
    Inventors: Chang-Tzu Wang, Bo-Shih Huang
  • Publication number: 20170229442
    Abstract: A semiconductor device includes a semiconductor substrate and a pair of first well regions formed in the semiconductor substrate, wherein the pair of first well regions have a first conductivity type and are separated by at least one portion of the semiconductor substrate. The semiconductor device also includes a first doping region formed in a portion of at least one portion of the semiconductor substrate separating the pair of first well regions, and a pair of second doping regions, respectively formed in one of the pair of first well regions, having the first conductivity type. Further, the semiconductor device includes a pair of insulating layers, respectively formed over a portion of the semiconductor substrate to cover a portion of the first doped region and one of the pair of second doping regions.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Inventors: Chien-Kai HUANG, Yuan-Fu CHUNG, Bo-Shih HUANG, Chang-Tzu WANG
  • Publication number: 20170221879
    Abstract: An electrostatic discharge (ESD) protection circuit has an ESD detection circuit, an ESD clamp circuit, and a leakage current reduction circuit. The ESD detection circuit generates an ESD trigger signal when an ESD event is detected in a normal mode. The ESD clamp circuit has a first transistor and a second transistor. The first transistor has a first connection terminal coupled to a first power rail, a control terminal, and a second connection terminal. A bias voltage is supplied to the control terminal of the first transistor in the normal mode. The second transistor has a first connection terminal coupled to the second connection terminal of the first transistor, a control terminal, and a second connection terminal coupled to a second power rail. The ESD trigger signal is transmitted to the control terminal of the second transistor. The leakage current reduction circuit provides the bias voltage to the first transistor.
    Type: Application
    Filed: November 16, 2016
    Publication date: August 3, 2017
    Inventors: Chang-Tzu Wang, Tzu-Yi Yang
  • Patent number: 9666576
    Abstract: An electrostatic discharge (ESD) protection device includes a semiconductor substrate and a pair of first well regions formed in the semiconductor substrate, wherein the pair of first well regions have a first conductivity type and are separated by at least one portion of the semiconductor substrate. In addition, the ESD protection device further includes a first doping region formed in a portion of the at least one portion of the semiconductor substrate separating the pair of first well regions, having a second conductivity type opposite to the first conductivity type. Moreover, the ESD protection device further includes a pair of second doping regions respectively formed in one of the first well regions, having the first conductivity type, and a pair of insulating layers respectively formed over a portion of the semiconductor substrate to cover a portion of the first doped region and one of the second doping regions.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: May 30, 2017
    Assignee: MEDIATEK INC.
    Inventors: Chien-Kai Huang, Yuan-Fu Chung, Bo-Shih Huang, Chang-Tzu Wang
  • Patent number: 9627210
    Abstract: A method of fabricating an electrostatic discharge protection structure includes the following steps. Firstly, a semiconductor substrate is provided. Plural isolation structures, a well region, a first conductive region and a second conductive region are formed in the semiconductor substrate. The well region contains first type conducting carriers. The first conductive region and the second conductive region contain second type conducting carriers. Then, a mask layer is formed on the surface of the semiconductor substrate, wherein a part of the first conductive region is exposed. Then, a first implantation process is performed to implant the second type conducting carriers into the well region by using the mask layer as an implantation mask, so that a portion of the first type conducting carriers of the well region is electrically neutralized and a first doped region is formed under the exposed part of the first conductive region.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: April 18, 2017
    Assignee: UNITED MICROELECTRONICS CORPORATION
    Inventors: Chang-Tzu Wang, Yu-Chun Chen, Tien-Hao Tang
  • Patent number: 9564436
    Abstract: A semiconductor device is described, including a substrate including a first area and a second area, a first MOS element of a first conductivity type in the first area, and a second MOS element of the first conductivity type in the second area. The first area is closer to a pick-up region of the substrate than the second area. The substrate has a second conductivity type. The bottom depth of a first electrical conduction path in the substrate in the first area is smaller than that of a second electrical conduction path in the substrate in the second area.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: February 7, 2017
    Assignee: United Microelectronics Corp.
    Inventors: Yung-Ju Wen, Chang-Tzu Wang, Tien-Hao Tang, Kuan-Cheng Su
  • Patent number: 9559091
    Abstract: A method of manufacturing a fin diode structure includes providing a substrate, forming a doped well in said substrate, forming at least one doped region of first conductivity type or at least one doped region of second doped type in said doped well, performing an etching process to said doped region of first conductivity type or said doped region of second conductivity type to form a plurality of fins on said doped region of first conductivity type or on said doped region of second conductivity type, forming shallow trench isolations between said fins, and performing a doping process to said fins to form fins of first conductivity type and fins of second conductivity type.
    Type: Grant
    Filed: June 21, 2015
    Date of Patent: January 31, 2017
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Chang-Tzu Wang, Ping-Chen Chang, Tien-Hao Tang, Kuan-Cheng Su
  • Publication number: 20160372468
    Abstract: The invention provides a semiconductor device. The semiconductor device includes a fin field effect transistor (finFET) array including finFET units. Each of the finFET units includes a substrate having a fin along a first direction. A first metal strip pattern and a second metal strip pattern are formed on the fin, extending along a second direction that is different from the first direction. The first and second metal strip patterns are conformally formed on opposite sidewalls and a top surface of the fin, respectively. A first contact and a second contact are formed on the fin. The first and second metal strip patterns are disposed between the first and second contacts. A first dummy contact is formed on the fin, sandwiched between the first and second metal strip patterns.
    Type: Application
    Filed: May 25, 2015
    Publication date: December 22, 2016
    Inventors: Chang-Tzu WANG, Bo-Shih HUANG
  • Patent number: 9455246
    Abstract: A fin diode structure and method of manufacturing the same is provided in present invention, which the structure includes a substrate, a doped well formed in the substrate, a plurality of fins of first conductivity type and a plurality of fins of second conductivity type protruding from the doped well, and a doped region of first conductivity type formed globally in the substrate between the fins of first conductivity type, the fins of second conductivity type, the shallow trench isolation and the doped well and connecting with the fins of first doped type and the fins of second doped type.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: September 27, 2016
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Chang-Tzu Wang, Ping-Chen Chang, Tien-Hao Tang, Kuan-Cheng Su
  • Patent number: 9449960
    Abstract: Provided is an electrostatic discharge (ESD) protection structure including a substrate, a pick-up region, a first MOS device, a second MOS device, a first doped region and a second doped region. The pick-up region is located in the substrate. The first MOS device has a first drain region of a first conductivity type located in the substrate. The second MOS device has a second drain region of the first conductivity type located in the substrate. The first drain region is closer to the pick up region than the second drain region is. The first doped region of a second conductivity type is located under the first doped region. The second doped region of the second conductivity type is located under the second doped region. The area and/or doping concentration of the first doped region is greater than that of the second doped region.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: September 20, 2016
    Assignee: United Microelectronics Corp.
    Inventors: Yung-Ju Wen, Chang-Tzu Wang, Tien-Hao Tang
  • Publication number: 20160268137
    Abstract: A method of fabricating an electrostatic discharge protection structure includes the following steps. Firstly, a semiconductor substrate is provided. Plural isolation structures, a well region, a first conductive region and a second conductive region are formed in the semiconductor substrate. The well region contains first type conducting carriers. The first conductive region and the second conductive region contain second type conducting carriers. Then, a mask layer is formed on the surface of the semiconductor substrate, wherein a part of the first conductive region is exposed. Then, a first implantation process is performed to implant the second type conducting carriers into the well region by using the mask layer as an implantation mask, so that a portion of the first type conducting carriers of the well region is electrically neutralized and a first doped region is formed under the exposed part of the first conductive region.
    Type: Application
    Filed: May 20, 2016
    Publication date: September 15, 2016
    Inventors: CHANG-TZU WANG, YU-CHUN CHEN, TIEN-HAO TANG
  • Patent number: 9437590
    Abstract: An ESD device disposed on a substrate is provided. The ESD device includes a first well, a second well, a first poly-silicon region, a second poly-silicon region and a first protection layer. The first well has a first conductive type and is disposed on the substrate. The second well has a second conductive type, is disposed on the substrate and is adjacent to the first well. The first poly-silicon region is disposed on the first well. The second poly-silicon region is disposed on the second well. The first protection layer covers portions of the first well, the second well, the first poly-silicon region and the second poly-silicon region. There is no doping region in the portions of the first well and the second well which are covered by the first protection layer and between the first poly-silicon region and the second poly-silicon region.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: September 6, 2016
    Assignee: MEDIATEK INC.
    Inventor: Chang-Tzu Wang
  • Publication number: 20160225755
    Abstract: An ESD device disposed on a substrate is provided. The ESD device includes a first well, a second well, a first poly-silicon region, a second poly-silicon region and a first protection layer. The first well has a first conductive type and is disposed on the substrate. The second well has a second conductive type, is disposed on the substrate and is adjacent to the first well. The first poly-silicon region is disposed on the first well. The second poly-silicon region is disposed on the second well. The first protection layer covers portions of the first well, the second well, the first poly-silicon region and the second poly-silicon region. There is no doping region in the portions of the first well and the second well which are covered by the first protection layer and between the first poly-silicon region and the second poly-silicon region.
    Type: Application
    Filed: January 29, 2015
    Publication date: August 4, 2016
    Inventor: Chang-Tzu WANG
  • Patent number: 9378958
    Abstract: A method of fabricating an electrostatic discharge protection structure includes the following steps. Firstly, a semiconductor substrate is provided. Plural isolation structures, a well region, a first conductive region and a second conductive region are formed in the semiconductor substrate. The well region contains first type conducting carriers. The first conductive region and the second conductive region contain second type conducting carriers. Then, a mask layer is formed on the surface of the semiconductor substrate, wherein a part of the first conductive region is exposed. Then, a first implantation process is performed to implant the second type conducting carriers into the well region by using the mask layer as an implantation mask, so that a portion of the first type conducting carriers of the well region is electrically neutralized and a first doped region is formed under the exposed part of the first conductive region.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: June 28, 2016
    Assignee: UNITED MICROELECTRONICS CORPORATION
    Inventors: Chang-Tzu Wang, Yu-Chun Chen, Tien-Hao Tang
  • Patent number: 9368500
    Abstract: A CMOS device includes a substrate, a pMOS transistor and an nMOS transistor formed on the substrate, and a gated diode. The gated diode includes a floating gate formed on the substrate in between the pMOS transistor and the nMOS transistor and a pair of a p-doped region and an n-doped region formed in the substrate and between the pMOS transistor and the nMOS transistor. The n-doped region is formed between the floating gate and the nMOS transistor, and the p-doped region is formed between the floating gate and the pMOS transistor.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: June 14, 2016
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Chang-Tzu Wang, Yu-Chun Chen, Tien-Hao Tang, Kuan-Cheng Su
  • Publication number: 20160141285
    Abstract: An electrostatic discharge (ESD) protection device includes a semiconductor substrate and a pair of first well regions formed in the semiconductor substrate, wherein the pair of first well regions have a first conductivity type and are separated by at least one portion of the semiconductor substrate. In addition, the ESD protection device further includes a first doping region formed in a portion of the at least one portion of the semiconductor substrate separating the pair of first well regions, having a second conductivity type opposite to the first conductivity type. Moreover, the ESD protection device further includes a pair of second doping regions respectively formed in one of the first well regions, having the first conductivity type, and a pair of insulating layers respectively formed over a portion of the semiconductor substrate to cover a portion of the first doped region and one of the second doping regions.
    Type: Application
    Filed: October 16, 2015
    Publication date: May 19, 2016
    Inventors: Chien-Kai HUANG, Yuan-Fu CHUNG, Bo-Shih HUANG, Chang-Tzu WANG
  • Patent number: 9331064
    Abstract: A fin diode structure includes a doped well formed in a substrate, a plurality of fins of first conductivity type and a plurality of fins of second conductivity type protruding from the doped well isolated from ins of first conductivity type by STIs, at least one doped region of first conductivity type in the substrate between the fins of first conductivity type, the STIs and the doped well and connecting with the fins of first conductivity type, and at least one doped region of second conductivity type in the substrate between the fins of second conductivity type, the STIs and the doped well and connecting with the fins of second conductivity type. The doping concentration of the fins of first conductivity type is greater than that of the doped region of first conductivity type whose doping concentration is greater than that of the doped well of first conductivity type.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: May 3, 2016
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Chang-Tzu Wang, Ping-Chen Chang, Tien-Hao Tang, Kuan-Cheng Su
  • Patent number: 9190840
    Abstract: An electrostatic discharge (ESD) protection circuit, suitable for an input stage circuit including a first N channel metal oxide semiconductor (NMOS) transistor, is provided. The ESD protection circuit includes an P channel metal oxide semiconductor (PMOS) transistor and an impedance device, in which the PMOS transistor has a source coupled to a gate of the first NMOS transistor, and a drain coupled to a source of the first NMOS transistor, and the impedance device is coupled between a gate of the PMOS transistor and a first power rail to perform a initial-on ESD protection circuit. The ESD protection circuit formed by the PMOS transistor and the resistor is capable of increasing the turn-on speed of the ESD protection circuit and preventing the input stage circuit from a CDM ESD event.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 17, 2015
    Assignee: UNITED MICROELECTRONICS CORPORATION
    Inventors: Ming-Dou Ker, Chun-Yu Lin, Chang-Tzu Wang
  • Publication number: 20150303183
    Abstract: A method of manufacturing a fin diode structure includes providing a substrate, forming a doped well in said substrate, forming at least one doped region of first conductivity type or at least one doped region of second doped type in said doped well, performing an etching process to said doped region of first conductivity type or said doped region of second conductivity type to form a plurality of fins on said doped region of first conductivity type or on said doped region of second conductivity type, forming shallow trench isolations between said fins, and performing a doping process to said fins to form fins of first conductivity type and fins of second conductivity type.
    Type: Application
    Filed: June 21, 2015
    Publication date: October 22, 2015
    Inventors: Chang-Tzu Wang, Ping-Chen Chang, Tien-Hao Tang, Kuan-Cheng Su