Including Diode Patents (Class 438/237)
  • Patent number: 11973133
    Abstract: A method for fabricating a semiconductor device includes the steps of providing a substrate having a high electron mobility transistor (HEMT) region and a capacitor region, forming a first mesa isolation on the HEMT region and a second mesa isolation on the capacitor region, forming a HEMT on the first mesa isolation, and then forming a capacitor on the second mesa isolation.
    Type: Grant
    Filed: May 8, 2023
    Date of Patent: April 30, 2024
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Kuo-Hsing Lee, Sheng-Yuan Hsueh, Chien-Liang Wu, Kuo-Yu Liao
  • Patent number: 11963460
    Abstract: A method for manufacturing a memory device is provided. The method includes etching an opening in a first dielectric layer; forming a bottom electrode, a resistance switching element, and a top electrode in the opening in the first dielectric layer; forming a second dielectric layer over the bottom electrode, the resistance switching element, and the top electrode; and forming an electrode via connected to a top surface of the top electrode in the second dielectric layer.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: April 16, 2024
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Hsin-Hsiang Tseng, Chih-Lin Wang, Yi-Huang Wu
  • Patent number: 11955474
    Abstract: An electrostatic discharge (ESD) protection circuit is provided. The protection circuit includes a MOS transistor and a resistor. The MOS transistor is electrically coupled to a core circuit. The resistor is electrically coupling to a gate of the MOS transistor for creating a bias on the gate to directing an ESD current to a ground when an ESD event occurs on the core circuit. A layout of the MOS transistor is spaced apart from a layout of the core circuit by a layout of a dummy structure. The resistor is formed by utilizing a portion of the dummy structure.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: April 9, 2024
    Assignee: NANYA TECHNOLOGY CORPORATION
    Inventor: Fang-Wen Liu
  • Patent number: 11940828
    Abstract: A voltage tracking circuit is provided. The voltage tracking circuit includes first and second P-type transistors and a control circuit. The drain of the first P-type transistor is coupled to a first voltage terminal. The gate and the drain of the second P-type transistor are respectively coupled to the first voltage terminal and a second voltage terminal. The control circuit is coupled to the first and second voltage terminals and generates a control voltage according to the first voltage and the second voltage. The sources of the first and second P-type transistors are coupled to an output terminal of the voltage tracking circuit, and the output voltage is generated at the output terminal. In response to the second voltage being higher than the first voltage, the control circuit generates the control signal to turn off the first P-type transistor.
    Type: Grant
    Filed: August 17, 2022
    Date of Patent: March 26, 2024
    Assignee: VANGUARD INTERNATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Shao-Chang Huang, Yeh-Ning Jou, Ching-Ho Li, Kai-Chieh Hsu, Chun-Chih Chen, Chien-Wei Wang, Gong-Kai Lin, Li-Fan Chen
  • Patent number: 11935886
    Abstract: An electrostatic discharge (ESD) protection circuit is provided. The protection circuit includes a MOS transistor and a resistor. The MOS transistor is electrically coupled to a core circuit. The resistor is electrically coupling to a gate of the MOS transistor for creating a bias on the gate to directing an ESD current to a ground when an ESD event occurs on the core circuit. A layout of the MOS transistor is spaced apart from a layout of the core circuit by a layout of a dummy structure. The resistor is formed by utilizing a portion of the dummy structure.
    Type: Grant
    Filed: June 13, 2023
    Date of Patent: March 19, 2024
    Assignee: NANYA TECHNOLOGY CORPORATION
    Inventor: Fang-Wen Liu
  • Patent number: 11876133
    Abstract: A silicon carbide device includes a transistor cell with a source region and a gate electrode. The source region is formed in a silicon carbide body and has a first conductivity type. A first low-resistive ohmic path electrically connects the source region and a doped region of a second conductivity type. The doped region and a floating well of the first conductivity type form a pn junction. A first clamp region having the second conductivity type extends into the floating well. A second low-resistive ohmic path electrically connects the first clamp region and the gate electrode.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: January 16, 2024
    Assignee: Infineon Technologies AG
    Inventors: Joachim Weyers, Franz Hirler, Wolfgang Jantscher, David Kammerlander, Ralf Siemieniec
  • Patent number: 11848371
    Abstract: A transistor includes a first layer comprising a group III-nitride semiconductor. A second layer comprising a group III-nitride semiconductor is disposed over the first layer. A third layer comprising a group III-nitride semiconductor is disposed over the second layer. An interface between the second layer and the third layer form a polarization heterojunction. A fourth layer comprising a group III-nitride semiconductor is disposed over the third layer. An interface between the third layer and the fourth layer forms a pn junction. A first electrical contact pad is disposed on the fourth layer. A second electrical contact pad is disposed on the third layer. A third electrical contact pad is electronically coupled to bias the polarization heterojunction.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: December 19, 2023
    Assignee: XEROX CORPORATION
    Inventors: Thomas Wunderer, Jengping Lu, Noble M. Johnson
  • Patent number: 11843369
    Abstract: An integrated device includes at least one MOS transistor having a plurality of cells. In each of one or more of the cells a disabling structure is provided. The disabling structure is configured to be in a non-conductive condition when the MOS transistor is switched on in response to a control voltage comprised between a threshold voltage of the MOS transistor and an intervention voltage of the disabling structure, or to be in a conductive condition otherwise. A system comprising at least one integrated device as above is also proposed. Moreover, a corresponding process for manufacturing this integrated device is proposed.
    Type: Grant
    Filed: July 29, 2021
    Date of Patent: December 12, 2023
    Assignee: STMicroelectronics S.r.l.
    Inventor: Davide Giuseppe Patti
  • Patent number: 11776607
    Abstract: The present disclosure provides a fusion memory including a plurality of memory cells, wherein each memory cell of the plurality of memory cells includes: a bulk substrate; a source and a drain on the bulk substrate; a channel extending between the source and the drain; a ferroelectric layer on the channel; and a gate on the ferroelectric layer.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 3, 2023
    Assignee: INSTITUTE OF MICROELECTRONICS, CHINESE ACADEMY OF SCIENCES
    Inventors: Hangbing Lv, Qing Luo, Xiaoxin Xu, Tiancheng Gong, Ming Liu
  • Patent number: 11721757
    Abstract: A LDMOS device includes a semiconductor layer on an insulation layer and a ring shape gate on the semiconductor layer. The ring shape gate includes a first gate portion, a second gate portion, and two third gate portions connecting the first gate portion and the second gate portion. The semiconductor device further includes a first drain region and a second drain region formed in the semiconductor layer at two sides of the ring shape gate, a plurality of source regions formed in the semiconductor layer surrounded by the ring shape gate, a plurality of body contact regions formed in the semiconductor layer and arranged between the source regions, and a first body implant region and a second body implant region formed in the semiconductor layer, respectively underlying part of the first gate portion and part of the second gate portion, and being connected by the body contact regions.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: August 8, 2023
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Purakh Raj Verma, Chia-Huei Lin, Kuo-Yuh Yang
  • Patent number: 11709189
    Abstract: An impedance sensing circuit includes first and second current sources and first and second bias current sources that are appropriately coupled to first and second resistors. The impedance sensing circuit also includes a comparator that compares a first voltage based on the first terminal of the first resistor to a second voltage based on the first terminal of the second resistor to generate a comparator output signal. Either the comparator output signal or a digital signal based on the comparator output signal operates to regulate the current signals output from the first and second current sources so that the first voltage is same as the second voltage. The comparator output signal and the digital signal is representative of a difference between the first voltage and the second voltage that is based on an impedance difference between the first resistor and the second resistor.
    Type: Grant
    Filed: August 26, 2021
    Date of Patent: July 25, 2023
    Assignee: SigmaSense, LLC.
    Inventor: Phuong Huynh
  • Patent number: 11664369
    Abstract: A semiconductor device includes a semiconductor layer, a first conductor disposed on the semiconductor layer, a second conductor disposed on the semiconductor layer so as to be separated from the first conductor, a relay portion that is formed on the semiconductor layer so as to straddle the first conductor and the second conductor and that is made of a semiconductor having a first conductivity type region and a second conductivity type region, a first contact by which the first conductivity type region and the second conductivity type region are electrically connected to the first conductor, and a second contact that electrically connects the first conductivity type region of the relay portion and the second conductor together and that is insulated from the second conductivity type region.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: May 30, 2023
    Assignee: ROHM CO., LTD.
    Inventor: Yusuke Kubo
  • Patent number: 11532607
    Abstract: Electrostatic discharge (ESD) structures are provided. An ESD structure includes a semiconductor substrate, a first epitaxy region with a first type of conductivity over the semiconductor substrate, a second epitaxy region with a second type of conductivity over the semiconductor substrate, and a plurality of first semiconductor layers and a plurality of second semiconductor layers. The first semiconductor layers and the second semiconductor layers are alternatingly stacked over the semiconductor substrate and between the first and second epitaxy regions. Each of the first and second semiconductor layers has a first side contacting the first epitaxy region and a second side contacting the second epitaxy region, and the first side is opposite the second side.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: December 20, 2022
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Chun-Chia Hsu, Tung-Heng Hsieh, Yung-Feng Chang, Bao-Ru Young, Jam-Wem Lee, Chih-Hung Wang
  • Patent number: 11362267
    Abstract: A memory device includes a substrate, an etch stop layer, a protective layer, and a resistance switching element. The substrate has a memory region and a logic region, and includes a metallization pattern therein. The etch stop layer is over the substrate, and has a first portion over the memory region and a second portion over the logic region. The protective layer covers the first portion of the etch stop layer. The protective layer does not cover the second portion of the etch stop layer. The resistance switching element is over the memory region, and the resistance switching element is electrically connected to the metallization pattern through the etch stop layer and the protective layer.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: June 14, 2022
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Hsin-Hsiang Tseng, Chih-Lin Wang, Yi-Huang Wu
  • Patent number: 11251282
    Abstract: In order to provide a power semiconductor device reducing a leakage current due to a defect layer and having a small fluctuation in a threshold voltage, included are an n-type epitaxial film layer formed on a surface of the single crystal n-type semiconductor substrate and having a concave portion and a convex portion; an insulating film formed on a first region in a top portion of the convex portion; a p-type thin film layer formed on a surface of the insulating film and a surface of the n-type epitaxial film layer to form a pn junction between the p-type thin film layer and the n-type epitaxial film layer; and an anode electrode, at least part of which is formed on a surface of the p-type thin film layer and part of which passes through the p-type thin film layer and the insulating film.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: February 15, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tatsuro Watahiki, Yohei Yuda
  • Patent number: 11211120
    Abstract: Various embodiments of the present application are directed towards an integrated chip. The integrated chip includes an array overlying a substrate and including multiple memory stacks in a plurality of rows and a plurality of columns. Each of the memory stacks includes a data storage structure having a variable resistance. A plurality of word lines are disposed beneath the array and extend along corresponding rows of the array. The word lines are electrically coupled with memory stacks of the array in the corresponding rows. A plurality of upper conductive vias extend from above the array of memory stacks to contact top surfaces of corresponding word lines.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: December 28, 2021
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chang-Chih Huang, Jui-Yu Pan, Kuo-Chyuan Tzeng
  • Patent number: 11201088
    Abstract: A method for forming a semiconductor device includes providing a substrate, forming an oxide layer over the substrate, forming a plurality of first gate oxide layers by etching the oxide layer, forming a second gate oxide layer between adjacent first gate oxide layers, forming a silicon layer over the plurality of first gate oxide layers and the second gate oxide layer, and etching the plurality of first gate oxide layers, the silicon layer, and the second gate oxide layer to expose the substrate, thereby forming a plurality of gate structures. The first gate oxide layer of the plurality of first gate oxide layers has sloped sidewalls. A thickness of the second gate oxide layer is less than a thickness of the first gate oxide layer. Each gate structure includes an etched first oxide layer, a portion of the second gate oxide layer, and a portion of the silicon layer.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: December 14, 2021
    Assignees: Semiconductor Manufacturing International (Shanghai) Corporation, Semiconductor Manufacturing International (Beijing) Corporation
    Inventors: Hu Wang, Shan Shan Wang, Feng Qiu, Wei Hu Zhang
  • Patent number: 10461125
    Abstract: In an example, a memory array may include a plurality of first dielectric materials and a plurality of stacks, where each respective first dielectric material and each respective stack alternate, and where each respective stack comprises a first conductive material and a storage material. A second conductive material may pass through the plurality of first dielectric materials and the plurality of stacks. Each respective stack may further include a second dielectric material between the first conductive material and the second conductive material.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: October 29, 2019
    Assignee: Micron Technology, Inc.
    Inventors: Agostino Pirovano, Andrea Redaelli, Fabio Pellizzer, Innocenzo Tortorelli
  • Patent number: 10211332
    Abstract: A semiconductor device including a field-effect transistor having source and drain source regions, first and second gate electrodes and a protective diode connected to the transistor. The first gate electrode is formed over a first gate insulating film in a lower part of a trench. The second gate electrode is formed over a second gate insulating film in an upper part of the trench. The first gate electrode includes a first polysilicon film, and the second gate electrode includes a second polysilicon film, wherein an impurity concentration of the first polysilicon film is lower than an impurity concentration of the second polysilicon film.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 19, 2019
    Assignee: Renesas Electronics Corporation
    Inventors: Yoshito Nakazawa, Yuji Yatsuda
  • Patent number: 9735142
    Abstract: With a microwave FET, an incorporated Schottky junction capacitance or PN junction capacitance is small and such a junction is weak against static electricity. However, with a microwave device, the method of connecting a protecting diode cannot be used since this method increases the parasitic capacitance and causes degradation of the high-frequency characteristics. In order to solve the above problems, a protecting element, having a first n+-type region—insulating region—second n+-type region arrangement is connected in parallel between two terminals of a protected element having a PN junction, Schottky junction, or capacitor. Since discharge can be performed between the first and second n+ regions that are adjacent each other, electrostatic energy that would reach the operating region of an FET can be attenuated without increasing the parasitic capacitance.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: August 15, 2017
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Tetsuro Asano, Mikito Sakakibara, Toshikazu Hirai
  • Patent number: 9671363
    Abstract: A chemical sensor is described. The chemical sensor includes a chemically-sensitive field effect transistor including a floating gate conductor having an upper surface. A material defines an opening extending to the upper surface of the floating gate conductor, the material comprising a first dielectric underlying a second dielectric. A conductive element contacts the upper surface of the floating gate conductor and extending a distance along a sidewall of the opening.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: June 6, 2017
    Assignee: Life Technologies Corporation
    Inventors: Keith G. Fife, Jordan Owens, Shifeng Li, James Bustillo
  • Patent number: 9281185
    Abstract: Methods for passivating a nanotube fabric layer within a nanotube switching device to prevent or otherwise limit the encroachment of an adjacent material layer are disclosed. In some embodiments, a sacrificial material is implanted within a porous nanotube fabric layer to fill in the voids within the porous nanotube fabric layer while one or more other material layers are applied adjacent to the nanotube fabric layer. Once the other material layers are in place, the sacrificial material is removed. In other embodiments, a non-sacrificial filler material (selected and deposited in such a way as to not impair the switching function of the nanotube fabric layer) is used to form a barrier layer within a nanotube fabric layer. In other embodiments, individual nanotube elements are combined with and nanoscopic particles to limit the porosity of a nanotube fabric layer.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: March 8, 2016
    Assignee: Nantero Inc.
    Inventors: Thomas Rueckes, H. Montgomery Manning, Rahul Sen
  • Patent number: 9236450
    Abstract: Fabricating a semiconductor device includes: forming a gate trench in an epitaxial layer overlaying a semiconductor substrate; depositing gate material in the gate trench; forming a body; forming a source; forming an active region contact trench that extends through the source and the body into a drain; forming a Schottky barrier controlling layer in the epitaxial layer in bottom region of the active region contact trench; and disposing a contact electrode within the active region contact trench. The Schottky barrier controlling layer controls Schottky barrier height of a Schottky diode formed by the contact electrode and the drain.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: January 12, 2016
    Assignee: Alpha and Omega Semiconductor Limited
    Inventors: Anup Bhalla, Xiaobin Wang, Ji Pan, Sung-Po Wei
  • Patent number: 9224852
    Abstract: A corner layout for a semiconductor device that maximizes the breakdown voltage is disclosed. The device includes first and second subsets of the striped cell arrays. The ends of each striped cell in the first array is spaced a uniform distance from the nearest termination device structure. In the second subset, the ends of striped cells proximate a corner of the active cell region are configured to maximize breakdown voltage by spacing the ends of each striped cell a non-uniform distance from the nearest termination device structure. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: December 29, 2015
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Lingpeng Guan, Anup Bhalla
  • Patent number: 9209225
    Abstract: A cell structure of a non-volatile memory is provided. The cell structure includes a first metal layer, a first dielectric layer, a first material layer, a second material layer, a first transition layer, a second metal layer, a second dielectric layer, a third material layer, a fourth material layer, a second transition layer, and a third metal layer. The first dielectric layer has a first via, and the first metal layer is exposed through the first via. The first material layer and the second material layer are reacted with each other to form the first transition layer. The second dielectric layer has a second via, and the second metal layer is exposed through the second via. The third material layer and the fourth material layer are reacted with each other to form the second transition layer.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: December 8, 2015
    Inventor: Chrong-Jung Lin
  • Patent number: 9153570
    Abstract: An electrostatic discharge tolerant device includes a semiconductor body having a first conductivity type, and a pad. A surrounding well having a second conductivity type is laid out in a ring to surround an area for an electrostatic discharge circuit in the semiconductor body. The surrounding well is relatively deep, and in addition to defining the area for the electrostatic discharge circuit, provides the first terminal of a diode formed with the semiconductor body. Within the area surrounded by the surrounding well, a diode coupled to the pad and a transistor coupled to the voltage reference are connected in series and form a parasitic device in the semiconductor body.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: October 6, 2015
    Assignee: Macronix International Co., Ltd.
    Inventors: Shih-Yu Wang, Chia-Ling Lu, Yan-Yu Chen, Yu-Lien Liu, Tao-Cheng Lu
  • Patent number: 9136833
    Abstract: There is provided a power source connection circuit, when a switch having a low dielectric strength is employed, capable of preventing excessive power consumption when the switch between an input terminal and an output terminal is turned off, and also discharging electric charges accumulated in a gate of the switch. A power source connection circuit includes a MOS switch connected to an output terminal; a step-up circuit for supplying electric charges to a gate of the MOS switch; an electric-charge discharging unit coupled between the gate and a ground terminal; and a comparator for comparing a voltage of the output terminal with a reference voltage, wherein the electric-charge discharging unit includes a rectifier unit coupled between the gate and the ground terminal, and a switch coupled in series with the rectifier unit between the gate and the ground terminal to receive an output signal of the comparator at a gate.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: September 15, 2015
    Assignee: Asahi Kasei Microdevices Corporation
    Inventor: Naoto Hayasaka
  • Patent number: 9130163
    Abstract: A method of forming a phase change material memory cell includes forming a number of memory structure regions, wherein the memory structure regions include a bottom electrode material and a sacrificial material, forming a number of insulator regions between the number of memory structure regions, forming a number of openings between the number of insulator regions and forming a contoured surface on the number of insulator regions by removing the sacrificial material and a portion of the number of insulator regions, forming a number of dielectric spacers on the number of insulator regions, forming a contoured opening between the number of insulator regions and exposing the bottom electrode material by removing a portion of the number of dielectric spacers, and forming a phase change material in the opening between the number of insulator regions.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: September 8, 2015
    Assignee: Micron Technology, Inc.
    Inventor: Sanh D. Tang
  • Patent number: 9082896
    Abstract: A pixel of an image sensor, the pixel includes a floating diffusion node to sense photo-generated charge, a reset diode to reset the floating diffusion node in response to a reset signal, and a set diode to set the floating diffusion node.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: July 14, 2015
    Assignee: Intellectual Ventures II LLC
    Inventor: Jaroslav Hynecek
  • Patent number: 9077920
    Abstract: A solid-state image pickup device includes a pixel array section including an effective pixel region, an optical black pixel region, and a pixel region between the effective pixel region and the optical black pixel region; a vertical drive section which performs driving so that signals of pixels of the pixel region disposed at a side of the effective pixel region in a vertical direction are skipped and signals of pixels of the effective pixel region and the optical black pixel region are read; and a horizontal drive section which performs driving so that, from among the pixels selected by the vertical drive section, the signals of the pixels of the pixel region disposed at a side of the effective pixel region in a horizontal direction are skipped and the signals of the pixels of the effective pixel region and the optical black pixel region are read.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: July 7, 2015
    Assignee: Sony Corporation
    Inventors: Ryoji Suzuki, Takayuki Toyama, Koji Mishina, Hiroyuki Tsuchiya
  • Patent number: 9053936
    Abstract: A method for forming a unit layout pattern includes: forming first through third active regions in the unit layout pattern, each of the first through third active regions aligning and extending along a length in a first direction and having a width in a second direction perpendicular to the first direction; forming first and second gate regions on the first and second active regions, the first and second gate regions electrically connected to each other; forming the first active region of a first conductive type within a second conductive type well region; forming the second active region of a second conductive type; and forming the third active region connected with the first and second gate regions to form a junction diode, the third active region being located between the first or the second active region and an end of the length in the first direction of the unit pattern.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 9, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Soo-Young Kim, Jong-Hak Won
  • Publication number: 20150147855
    Abstract: A semiconductor device includes: first and second n-type wells formed in p-type semiconductor substrate, the second n-type well being deeper than the first n-type well; first and second p-type backgate regions formed in the first and second n-type wells; first and second n-type source regions formed in the first and second p-type backgate regions; first and second n-type drain regions formed in the first and second n-type wells, at positions opposed to the first and second n-type source regions, sandwiching the first and the second p-type backgate regions; and field insulation films formed on the substrate, at positions between the first and second p-type backgate regions and the first and second n-type drain regions; whereby first transistor is formed in the first n-type well, and second transistor is formed in the second n-type well with a higher reverse voltage durability than the first transistor.
    Type: Application
    Filed: February 5, 2015
    Publication date: May 28, 2015
    Inventor: Kazuhiko Takada
  • Publication number: 20150137135
    Abstract: An embodiment of a semiconductor device includes a semiconductor substrate that includes an upper surface and a channel, a gate electrode disposed over the substrate electrically coupled to the channel, and a Schottky metal layer disposed over the substrate adjacent the gate electrode. The Schottky metal layer includes a Schottky contact electrically coupled to the channel which provides a Schottky junction and at least one alignment mark disposed over the semiconductor substrate. A method for fabricating the semiconductor device includes creating an isolation region that defines an active region along an upper surface of a semiconductor substrate, forming a gate electrode over the semiconductor substrate in the active region, and forming a Schottky metal layer over the semiconductor substrate. Forming the Schottky metal layer includes forming at least one Schottky contact electrically coupled to the channel and providing a Schottky junction, and forming an alignment mark in the isolation region.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Inventors: BRUCE M. GREEN, DARRELL G. HILL, KAREN E. MOORE
  • Patent number: 9029235
    Abstract: A trench isolation metal-oxide-semiconductor (MOS) P-N junction diode device and a manufacturing method thereof are provided. The trench isolation MOS P-N junction diode device is a combination of an N-channel MOS structure and a lateral P-N junction diode, wherein a polysilicon-filled trench oxide layer is buried in the P-type structure to replace the majority of the P-type structure. As a consequence, the trench isolation MOS P-N junction diode device of the present invention has the benefits of the Schottky diode and the P-N junction diode. That is, the trench isolation MOS P-N junction diode device has rapid switching speed, low forward voltage drop, low reverse leakage current and short reverse recovery time.
    Type: Grant
    Filed: May 26, 2014
    Date of Patent: May 12, 2015
    Assignee: PFC Device Corp.
    Inventors: Mei-Ling Chen, Hung-Hsin Kuo, Kuo-Liang Chao
  • Publication number: 20150115351
    Abstract: An integrated circuit includes a power component including a plurality of first trenches in a cell array and a first conductive material in the first trenches electrically coupled to a gate terminal of the power component, and a diode component including a first diode device trench and a second diode device trench disposed adjacent to each other. A second conductive material in the first and the second diode device trenches is electrically coupled to a source terminal of the diode component. The first trenches, the first diode device trench and the second diode device trench are disposed in a first main surface of a semiconductor substrate. The integrated circuit further includes a diode gate contact including a connection structure between the first and the second diode device trenches. The connection structure is in contact with the second conductive material in the first and the second diode device trenches.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Inventor: Britta Wutte
  • Patent number: 9012997
    Abstract: A semiconductor device includes a semiconductor-on-insulator (SOI) substrate having a bulk substrate layer, an active semiconductor layer and a buried insulator layer disposed between the bulk substrate layer and the active semiconductor layer. A trench is formed through the SOI substrate to expose the bulk substrate layer. A doped well is formed in an upper region of the bulk substrate layer adjacent trench. The semiconductor device further includes a first doped region different from the doped well that is formed in the trench.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: April 21, 2015
    Assignee: International Business Machines Corporation
    Inventors: Tenko Yamashita, Terence B. Hook, Veeraraghavan S. Basker, Chun-Chen Yeh
  • Publication number: 20150084118
    Abstract: A semiconductor device includes a vertical FET device and a Schottky bypass diode. The vertical FET device includes a gate contact, a source contact, and a drain contact. The gate contact and the source contact are separated from the drain contact by at least a drift layer. The Schottky bypass diode is coupled between the source contact and the drain contact and monolithically integrated adjacent to the vertical FET device such that a voltage placed between the source contact and the drain contact is distributed throughout the drift layer by the Schottky bypass diode in such a way that a voltage across each one of a plurality of P-N junctions formed between the source contact and the drain contact within the vertical FET device is prevented from exceeding a barrier voltage of the respective P-N junction.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 26, 2015
    Applicant: Cree, Inc.
    Inventors: Edward Robert Van Brunt, Vipindas Pala, Lin Cheng
  • Publication number: 20150084119
    Abstract: A semiconductor device includes a vertical field-effect-transistor (FET) and a bypass diode. The vertical FET device includes a substrate, a drift layer formed over the substrate, a gate contact and a plurality of source contacts located on a first surface of the drift layer opposite the substrate, a drain contact located on a surface of the substrate opposite the drift layer, and a plurality of junction implants, each of the plurality of junction implants laterally separated from one another on the surface of the drift layer opposite the substrate and extending downward toward the substrate. Each of the one or more bypass diodes are formed by placing a Schottky metal contact on the first surface of the drift layer, such that each Schottky metal contact runs between two of the plurality of junction implants.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 26, 2015
    Applicant: Cree, Inc.
    Inventors: Vipindas Pala, Edward Robert Van Brunt, Lin Cheng, John Williams Palmour
  • Publication number: 20150084059
    Abstract: A semiconductor device according to an embodiment includes a first GaN based semiconductor layer of a first conductive type, a second GaN based semiconductor layer of the first conductive type provided above the first GaN based semiconductor layer, a third GaN based semiconductor layer of a second conductive type provided above a part of the second GaN based semiconductor layer, a epitaxially grown fourth GaN based semiconductor layer of the first conductive type provided above the third GaN based semiconductor layer, a gate insulating film provided on the second, third, and fourth GaN based semiconductor layer, a gate electrode provided on the gate insulating film, a first electrode provided on the fourth GaN based semiconductor layer, a second electrode provided at the side of the first GaN based semiconductor layer opposite to the second GaN based semiconductor layer, and a third electrode provided on the second GaN based semiconductor layer.
    Type: Application
    Filed: August 6, 2014
    Publication date: March 26, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Miki YUMOTO, Masahiko Kuraguchi
  • Publication number: 20150087122
    Abstract: Provided is a semiconductor device that can be manufactured at low cost and that can reduce a reverse leak current, and a manufacturing method thereof. A semiconductor device has: a source region and a drain region having a body region therebetween; a source trench that reaches the body region, penetrating the source region; a body contact region formed at the bottom of the source trench; a source electrode embedded in the source trench; and a gate electrode that faces the body region. The semiconductor device also has: an n-type region for a diode; a diode trench formed reaching the n-type region for a diode; a p+ region for a diode that forms a pn junction with the n-type region for a diode at the bottom of the diode trench; and a schottky electrode that forms a schottky junction with the n-type region for a diode at side walls of the diode trench.
    Type: Application
    Filed: December 4, 2014
    Publication date: March 26, 2015
    Applicant: ROHM CO., LTD.
    Inventor: Kenichi YOSHIMOCHI
  • Patent number: 8975123
    Abstract: Device structures, fabrication methods, and design structures for tunnel field-effect transistors. A drain comprised of a first semiconductor material having a first band gap and a source comprised of a second semiconductor material having a second band gap are formed. A tunnel barrier is formed between the source and the drain. The second semiconductor material exhibits a broken-gap energy band alignment with the first semiconductor material. The tunnel barrier is comprised of a third semiconductor material with a third band gap larger than the first band gap and larger than the second band gap. The third band gap is configured to bend under an external bias to assist in aligning a first energy band of the first semiconductor material with a second energy band of the second semiconductor material.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: March 10, 2015
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Daley, Hung H. Tran, Wayne H. Woods, Ze Zhang
  • Patent number: 8969150
    Abstract: A trench gate type MISFET and a diode are formed in a semiconductor substrate. First and second trenches are formed in the semiconductor substrate. A gate electrode is formed in the first trench through a gate insulating film. A dummy gate electrode is formed in the second trench through a dummy gate insulating film. A cathode n+-type semiconductor region and an anode p-type semiconductor region are formed in the semiconductor substrate and the second trench is formed so as to surround the n+-type semiconductor region in a planar view. A part of the anode p-type semiconductor region is formed directly below the n+-type semiconductor region, so that a PN junction is formed between the part of the anode p-type semiconductor region and the n+-type semiconductor region. Thereby a diode is formed. The dummy gate electrode is electrically coupled to one of an anode and a cathode.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: March 3, 2015
    Assignee: Renesas Electronics Corporation
    Inventors: Hiroaki Katou, Taro Moriya, Hiroyoshi Kudou, Satoshi Uchiya
  • Publication number: 20150035006
    Abstract: A semiconductor device includes a first-conductivity-type semiconductor layer including an active region in which a transistor having impurity regions is formed and a marginal region surrounding the active region, a second-conductivity-type channel layer formed between the active region and the marginal region and forming a front surface of the semiconductor layer, at least one gate trench formed in the active region to extend from the front surface of the semiconductor layer through the channel layer, a gate insulation film formed on an inner surface of the gate trench, a gate electrode formed inside the gate insulation film in the gate trench, and at least one isolation trench arranged between the active region and the marginal region to surround the active region and extending from the front surface of the semiconductor layer through the channel layer, the isolation trench having a depth equal to that of the gate trench.
    Type: Application
    Filed: October 17, 2014
    Publication date: February 5, 2015
    Inventor: Kenichi YOSHIMOCHI
  • Patent number: 8947936
    Abstract: A 3D memory device includes a plurality of ridge-shaped stacks, in the form of multiple strips of conductive material separated by insulating material, arranged as strings which can be coupled through decoding circuits to sense amplifiers. Diodes are connected to the bit line structures at either the string select of common source select ends of the strings. The strips of conductive material have side surfaces on the sides of the ridge-shaped stacks. A plurality of conductive lines arranged as word lines which can be coupled to row decoders, extends orthogonally over the plurality of ridge-shaped stacks. Memory elements lie in a multi-layer array of interface regions at cross-points between side surfaces of the conductive strips on the stacks and the conductive lines.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: February 3, 2015
    Assignee: Macronix International Co., Ltd.
    Inventors: Chun-Hsiung Hung, Shin-Jang Shen, Hang-Ting Lue
  • Patent number: 8946018
    Abstract: Some embodiments include methods of forming semiconductor constructions. A heavily-doped region is formed within a first semiconductor material, and a second semiconductor material is epitaxially grown over the first semiconductor material. The second semiconductor material is patterned to form circuit components, and the heavily-doped region is patterned to form spaced-apart buried lines electrically coupling pluralities of the circuit components to one another. At least some of the patterning of the heavily-doped region occurs simultaneously with at least some of the patterning of the second semiconductor material.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: February 3, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Jaydip Guha, Shyam Surthi
  • Publication number: 20150021680
    Abstract: A FET incorporating a Schottky diode has a structure allowing the ratio of an area in which the Schottky diode is formed and an area in which the FET is formed to be freely adjusted. A trench extending for a long distance is utilized. Schottky electrodes are interposed at positions appearing intermittently in the longitudinal direction of the trench. By taking advantage of the growth rate of a thermal oxide film formed on SiC being slower, and the growth rate of a thermal oxide film formed on polysilicon being faster, a structure can be obtained in which insulating film is formed between gate electrodes and Schottky electrodes, between the gate electrodes and a source region, between the gate electrodes and a body region, and between the gate electrodes and a drain region, and in which insulating film is not formed between the Schottky electrodes and the drain region.
    Type: Application
    Filed: June 9, 2014
    Publication date: January 22, 2015
    Inventors: Yukihiko WATANABE, Sachiko AOI, Hidefumi TAKAYA, Atsuya AKIBA
  • Publication number: 20150014769
    Abstract: A high-voltage LDMOS device with voltage linearizing field plates and methods of manufacture are disclosed. The method includes forming a continuous gate structure over a deep well region and a body of a substrate. The method further includes forming oppositely doped, alternating segments in the continuous gate structure. The method further includes forming a contact in electrical connection with a tip of the continuous gate structure and a drain region formed in the substrate. The method further includes forming metal regions in direct electrical contact with segments of at least one species of the oppositely doped, alternating segments.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventors: John J. ELLIS-MONAGHAN, Theodore J. LETAVIC, Santosh SHARMA, Yun SHI, Michael J. ZIERAK
  • Patent number: 8928072
    Abstract: Provided is a semiconductor device that can be manufactured at low cost and that can reduce a reverse leak current, and a manufacturing method thereof. A semiconductor device has: a source region and a drain region having a body region therebetween; a source trench that reaches the body region, penetrating the source region; a body contact region formed at the bottom of the source trench; a source electrode embedded in the source trench; and a gate electrode that faces the body region. The semiconductor device also has: an n-type region for a diode; a diode trench formed reaching the n-type region for a diode; a p+ region for a diode that forms a pn junction with the n-type region for a diode at the bottom of the diode trench; and a schottky electrode that forms a schottky junction with the n-type region for a diode at side walls of the diode trench.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: January 6, 2015
    Assignee: Rohm Co., Ltd.
    Inventor: Kenichi Yoshimochi
  • Publication number: 20150001579
    Abstract: A capacitive component region is formed below a temperature detecting diode or below a protective diode. In addition, the capacitive component region is formed below an anode metal wiring line connecting the temperature detecting diode and an anode electrode pad and below a cathode metal wiring line connecting the temperature detecting diode and a cathode electrode pad. The capacitive component region is an insulating film interposed between polysilicon layers. Specifically, a first insulating film, a polysilicon conductive layer, and a second insulating film are sequentially formed on a first main surface of a semiconductor substrate, and the temperature detecting diode, the protective diode, the anode metal wiring line, or the cathode metal wiring line is formed on the upper surface of the second insulating film. Therefore, it is possible to improve the static electricity resistance of the temperature detecting diode or the protective diode.
    Type: Application
    Filed: September 12, 2014
    Publication date: January 1, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Takeyoshi NISHIMURA
  • Publication number: 20140374824
    Abstract: Aspects of the present disclosure describe a Schottky structure with two trenches formed in a semiconductor material. The trenches are spaced apart from each other by a mesa. Each trench may have first and second conductive portions lining the first and second sidewalls. The first and second portions of conductive material are electrically isolated from each other in each trench. The Schottky contact may be formed at any location between the outermost conductive portions. The Schottky structure may be formed in the active area or the termination area of a device die. It is emphasized that this abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Daniel Calafut, Yeeheng Lee