Vertical Channel Patents (Class 438/156)
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Patent number: 8927353Abstract: A fin field effect transistor and method of forming the same. The fin field effect transistor includes a semiconductor substrate having a fin structure and between two trenches with top portions and bottom portions. The fin field effect transistor further includes shallow trench isolations formed in the bottom portions of the trenches and a gate electrode over the fin structure and the shallow trench isolation, wherein the gate electrode is substantially perpendicular to the fin structure. The fin field effect transistor further includes a gate dielectric layer along sidewalls of the fin structure and source/drain electrode formed in the fin structure.Type: GrantFiled: May 7, 2007Date of Patent: January 6, 2015Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Ju-Wang Hsu, Chih-Yuan Ting, Tang-Xuan Zhong, Yi-Nien Su, Jang-Shiang Tsai
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Patent number: 8928093Abstract: A semiconductor device may include body contacts on a finFET device for ESD protection. The semiconductor device comprises a semiconductor fin, a source/drain region and a body contact. The source/drain region and the body contact are in the semiconductor fin. A portion of the fin is laterally between the source/drain region and the body contact. The semiconductor fin is on a substrate.Type: GrantFiled: March 10, 2014Date of Patent: January 6, 2015Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Ching-Hsiung Lo, Jam-Wem Lee, Wun-Jie Lin, Jen-Chou Tseng
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Patent number: 8912612Abstract: A FinFET structure which includes: silicon fins on a semiconductor substrate, each silicon fin having two sides and a horizontal surface; a gate wrapping around at least one of the silicon fins, the gate having a first surface and an opposing second surface facing the at least one of the silicon fins; a hard mask on a top surface of the gate; a silicon nitride layer formed in each of the first and second surfaces so as to be below and in direct contact with the hard mask on the top surface of the gate; spacers on the gate and in contact with the silicon nitride layer; and epitaxially deposited silicon on the at least one of the silicon fins so as to form a raised source/drain.Type: GrantFiled: August 30, 2013Date of Patent: December 16, 2014Assignee: International Business Machines CorporationInventors: Veeraraghavan S. Basker, Sanjay Mehta, Tenko Yamashita, Chun-Chen Yeh
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Patent number: 8912053Abstract: A method for fabricating a non-volatile memory device includes forming a stacked structure where a plurality of inter-layer dielectric layers and a plurality of second sacrificial layers are alternately stacked over a substrate, forming a channel layer that is coupled with a portion of the substrate by penetrating through the stacked structure, forming a slit that penetrates through the second sacrificial layers by selectively etching the stacked structure, removing the second sacrificial layers that are exposed through the slit, forming an epitaxial layer over the channel layer exposed as a result of the removal of the second sacrificial layers, and forming a gate electrode layer filling a space from which the second sacrificial layers are removed, and a memory layer interposed between the gate electrode layer and the epitaxial layer.Type: GrantFiled: September 7, 2012Date of Patent: December 16, 2014Assignee: SK Hynix Inc.Inventor: Hyun-Seung Yoo
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Patent number: 8907406Abstract: A semiconductor device according to embodiments includes a semiconductor substrate, a buried insulating layer which is formed on the semiconductor substrate, a semiconductor layer which is formed on the buried insulating layer and includes a narrow portion and two wide portions which are larger than the narrow portion in width and are respectively connected to one end and the other end of the narrow portion, a gate insulating film which is formed on a side surface of the narrow portion, and a gate electrode formed on the gate insulating film. The impurity concentration of the semiconductor substrate directly below the narrow portion is higher than the impurity concentration of the narrow portion, and the impurity concentration of the semiconductor substrate directly below the narrow portion is higher than the impurity concentration of the semiconductor substrate directly below the wide portion.Type: GrantFiled: December 28, 2012Date of Patent: December 9, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Kensuke Ota, Toshinori Numata, Masumi Saitoh, Chika Tanaka, Yusuke Higashi
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Patent number: 8906759Abstract: A method of forming a FinFET structure which includes forming fins on a semiconductor substrate; forming a gate wrapping around at least one of the fins, the gate having a first surface and an opposing second surface facing the fins; depositing a hard mask on a top of the gate; angle implanting nitrogen into the first and second surfaces of the gate so as to form a nitrogen-containing layer in the gate that is below and in direct contact with the hard mask on top of the gate; forming spacers on the gate and in contact with the nitrogen-containing layer; and epitaxially depositing silicon on the at least one fin so as to form a raised source/drain. Also disclosed is a FinFET structure.Type: GrantFiled: February 25, 2013Date of Patent: December 9, 2014Assignee: International Business Machines CorporationInventors: Veeraraghavan S. Basker, Sanjay Mehta, Tenko Yamashita, Chun-Chen Yeh
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Publication number: 20140353746Abstract: A semiconductor device of the present invention includes a semiconductor layer, a source region and a drain region formed in a surface of the semiconductor layer, both having a first conductivity type, a plurality of gate trenches each formed so as to extend across the source region and the drain region, in a plan view observed in a direction of a normal to the surface of the semiconductor layer, a channel region of a first conductivity type made of the semiconductor layer sandwiched by the gate trenches adjacent to each other, having a channel length along a direction extending from the drain region to the source region, and a gate electrode buried in the gate trench via a gate insulating film, and the channel region has a thickness in the plan view not more than two times a width of a depletion layer to be generated due to a built-in potential between the channel region and the gate electrode.Type: ApplicationFiled: May 30, 2014Publication date: December 4, 2014Applicant: ROHM CO., LTD.Inventor: Yasushi HAMAZAWA
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Patent number: 8901644Abstract: Disclosed herein is a field effect transistor with a vertical channel and a fabrication method thereof. A channel region of the field effect transistor is a circular ring-shaped Si platform, which is formed over a substrate and perpendicular to the substrate; a source, which is made of polysilicon, is located at an upper end of the Si platform; a drain is disposed at an outside of a lower end of the circular ring-shaped Si platform; a gate is placed on an outer side surface of the circular ring-shaped Si platform; and an inside of the circular ring-shaped Si platform is filled with a dielectric material. In comparison with the conventional vertical structure MOSFET with a Si platform, the circular ring-shaped structure field effect transistor according to the invention can effectively suppress the short channel effect and improve the device performance.Type: GrantFiled: September 9, 2011Date of Patent: December 2, 2014Assignee: Peking UniversityInventors: Ru Huang, Yujie Ai, Zhihua Hao, Shuangshuang Pu, Jiewen Fan, Shuai Sun, Runsheng Wang, Xiaoyan Xu
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Patent number: 8901619Abstract: Asymmetric FET devices, and a method for fabricating such asymmetric devices on a fin structure is disclosed. The fabrication method includes disposing over the fin a high-k dielectric layer followed by a threshold-modifying layer, performing an ion bombardment at a tilted angle which removes the threshold-modifying layer over one of the fin's side-surfaces. The completed FET devices will be asymmetric due to the threshold-modifying layer being present only in one of two devices on the side of the fin. In an alternate embodiment further asymmetries are introduced, again using tilted ion implantation, resulting in differing gate-conductor materials for the two FinFET devices on each side of the fin.Type: GrantFiled: May 14, 2012Date of Patent: December 2, 2014Assignee: International Business Machines CorporationInventors: Kangguo Cheng, Bruce B. Doris, Ying Zhang
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Patent number: 8896067Abstract: Embodiments of present invention provide a method of forming a first and a second group of fins on a substrate; covering a top first portion of the first and second groups of fins with a first dielectric material; covering a bottom second portion of the first and second groups of fins with a second dielectric material, the bottom second portion of the first group and the second group of fins having a same height; exposing a middle third portion of the first and second groups of fins to an oxidizing environment to create an oxide section that separates the top first portion from the bottom second portion of the first and second groups of fins; and forming one or more fin-type field-effect-transistors (FinFETs) using the top first portion of the first and second groups of fins as fins under gates of the one or more FinFETs.Type: GrantFiled: January 8, 2013Date of Patent: November 25, 2014Assignee: International Business Machines CorporationInventors: Marc Adam Bergendahl, David Vaclav Horak, Shom Ponoth, Chih-Chao Yang, Charles William Koburger, III
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Patent number: 8890144Abstract: A high voltage semiconductor device includes a substrate, an insulating layer positioned on the substrate, and a silicon layer positioned on the insulating layer. The silicon layer further includes at least a first doped strip, two terminal doped regions formed respectively at two opposite ends of the silicon layer and electrically connected to the first doped strip, and a plurality of second doped strips. The first doped strip and the terminal doped regions include a first conductivity type, the second doped strips include a second conductivity type, and the first conductivity type and the second conductivity type are complementary. The first doped strip and the second doped strips are alternately arranged.Type: GrantFiled: March 8, 2012Date of Patent: November 18, 2014Assignee: United Microelectronics Corp.Inventors: Pao-An Chang, Ching-Ming Lee, Te-Yuan Wu, Chih-Chung Wang, Wen-Fang Lee, Wei-Lun Hsu
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Patent number: 8883575Abstract: A process may include forming a mask directly on and above a region selected as an initial semiconductor fin on a substrate and reducing the initial semiconductor fin forming a semiconductor fin that is laterally thinned from the initial semiconductor fin. The process may be carried out causing the mask to recede to a greater degree in the lateral direction than the vertical direction. In various embodiments, the process may include removing material from the fin semiconductor to achieve a thinned semiconductor fin, which has receded beneath the shadow of the laterally receded mask. Electronic devices may include the thinned semiconductor fin as part of a semiconductor device.Type: GrantFiled: April 5, 2012Date of Patent: November 11, 2014Assignee: Micron Technology, Inc.Inventors: Mark Fischer, T. Earl Allen, H. Montgomery Manning
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Patent number: 8883576Abstract: Provided are methods of fabricating a semiconductor device. The method may include forming a mold layer on a substrate, forming a mask layer on the mold layer, etching the mold layer using the mask layer as an etch mask to form a channel hole penetrating the mold layer, shrinking the mask layer to provide a reduced mask layer, forming a spacer layer to cover the reduced mask layer, and forming a vertical channel to fill the channel hole and be electrically connected to the substrate. As a result, the channel hole can have an enlarged entrance.Type: GrantFiled: September 13, 2012Date of Patent: November 11, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jinkwan Lee, Yoochul Kong, Seongsoo Lee
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Patent number: 8883578Abstract: Various embodiments form silicon and silicon germanium fins on a semiconductor wafer. In one embodiment a semiconductor wafer is obtained. The semiconductor wafer comprises a substrate, a dielectric layer, and a semiconductor layer including silicon germanium (SiGe). At least one SiGe fin is formed from at least a first SiGe region of the semiconductor layer in at least one PFET region of the semiconductor wafer. Strained silicon is epitaxially grown on at least a second SiGe region of the semiconductor layer. At least one strained silicon fin is formed from the strained silicon in at least one NFET region of the semiconductor wafer.Type: GrantFiled: September 19, 2013Date of Patent: November 11, 2014Assignee: International Business Machines CorporationInventors: Veeraraghavan S. Basker, Chun-chen Yeh, Tenko Yamashita
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Patent number: 8883587Abstract: A method of manufacturing a semiconductor device includes forming silicon line patterns in a semiconductor substrate, forming an insulating layer over the silicon line patterns, forming a conductive pattern between the silicon line patterns, forming a spacer over the substrate, forming an interlayer insulating layer between the silicon line patterns, removing the spacer on one side of the silicon line patterns to expose the conductive pattern, forming a bit line contact open region by removing the interlayer insulating layer, forming a polysilicon pattern to cover the bit line contact open region, and forming a junction region diffused to the silicon line pattern through the bit line contact open region. Thereby, a stacked structure of a titanium layer and a polysilicon layer are stably formed when forming a buried bit line and a bit line contact is formed using diffusion of the polysilicon layer to prevent leakage current.Type: GrantFiled: July 20, 2011Date of Patent: November 11, 2014Assignee: Hynix Semiconductor Inc.Inventor: Seung Hwan Kim
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Patent number: 8871573Abstract: A method for forming a semiconductor device is provided. The method includes providing a wafer-stack having a main horizontal surface, an opposite surface, a buried dielectric layer, a semiconductor wafer extending from the buried dielectric layer to the main horizontal surface, and a handling wafer extending from the buried dielectric layer to the opposite surface; etching a deep vertical trench into the semiconductor wafer at least up to the buried dielectric layer, wherein the buried dielectric layer is used as an etch stop; forming a vertical transistor structure comprising forming a first doped region in the semiconductor wafer; forming a first metallization on the main horizontal surface in ohmic contact with the first doped region; removing the handling wafer to expose the buried dielectric layer; and masked etching of the buried dielectric layer to partly expose the semiconductor wafer on a back surface opposite to the main horizontal surface.Type: GrantFiled: July 12, 2012Date of Patent: October 28, 2014Assignee: Infineon Technologies Austria AGInventors: Franz Hirler, Andreas Meiser
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Patent number: 8859350Abstract: A semiconductor device having a gate positioned in a recess between the source region and a drain region that are adjacent either side of the gate electrode. A channel region is below a majority of the source region as well as a majority of the drain region and the entire gate electrode.Type: GrantFiled: January 17, 2014Date of Patent: October 14, 2014Assignees: STMicroelectronics, Inc., International Business Machines CorporationInventors: John H. Zhang, Yiheng Xu, Carl Radens, Lawrence A. Clevenger
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Patent number: 8859349Abstract: Methods of fabricating charge storage transistors are described, along with apparatus and systems that include them. In one such method, a pillar of epitaxial silicon is formed. At least first and second charge storage nodes (e.g., floating gates) are formed around the pillar of epitaxial silicon at different levels. A control gate is formed around each of the charge storage nodes. Additional embodiments are also described.Type: GrantFiled: January 18, 2013Date of Patent: October 14, 2014Assignee: Micron Technology, Inc.Inventors: Gurtej S. Sandhu, Durai Vishak Nirmal Ramaswamy
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Patent number: 8853025Abstract: An embodiment method of controlling threshold voltages in a fin field effect transistor (FinFET) includes forming a dummy gate over a central portion of a fin, the central portion of the fin disposed between exterior portions of the fin unprotected by the dummy gate, removing the exterior portions of the fin and replacing the exterior portions of the fin with an epitaxially-grown silicon-containing material, applying a spin-on resist over the dummy gate and the epitaxially-grown silicon-containing material and then removing the spin-on resist over the hard mask of the dummy gate, etching away the hard mask and a polysilicon of the dummy gate to expose a gate oxide of the dummy gate, the gate oxide disposed over the central portion of the fin, and implanting ions into the central portion of the fin through the gate oxide disposed over the central portion of the fin.Type: GrantFiled: February 8, 2013Date of Patent: October 7, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Ying Zhang, Ziwei Fang, Jeffrey Junhao Xu
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Patent number: 8841178Abstract: Various embodiments form silicon and silicon germanium fins on a semiconductor wafer. In one embodiment a semiconductor wafer is obtained. The semiconductor wafer comprises a substrate, a dielectric layer, and a semiconductor layer including silicon germanium (SiGe). At least one SiGe fin is formed from at least a first SiGe region of the semiconductor layer in at least one PFET region of the semiconductor wafer. Strained silicon is epitaxially grown on at least a second SiGe region of the semiconductor layer. At least one strained silicon fin is formed from the strained silicon in at least one NFET region of the semiconductor wafer.Type: GrantFiled: March 13, 2013Date of Patent: September 23, 2014Assignee: International Business Machines CorporationInventors: Veeraraghavan S. Basker, Chun-chen Yeh, Tenko Yamashita
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Publication number: 20140273359Abstract: A method for fabricating a semiconductor device is provided. The method includes forming a gate pattern which intersects a fin-type active pattern protruding upward from a device isolation layer. A first blocking pattern is formed on a portion of the fin-type active pattern, which does not overlap the gate pattern. Side surfaces of the portion of the fin-type active pattern are exposed. A semiconductor pattern is formed on the exposed side surfaces of the portion of the fin-type active pattern after the forming of the first blocking pattern.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: JIN-BUM KIM, HA-KYU SEONG
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Publication number: 20140264347Abstract: When forming cavities in active regions of semiconductor devices in order to incorporate a strain-inducing semiconductor material, an improved shape of the cavities may be achieved by using an amorphization process and a heat treatment so as to selectively modify the etch behavior of exposed portions of the active regions and to adjust the shape of the amorphous regions. In this manner, the basic configuration of the cavities may be adjusted with a high degree of flexibility. Consequently, the efficiency of the strain-inducing technique may be improved.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: GLOBALFOUNDRIES INC.Inventors: Nicolas Sassiat, Carsten Grass, Jan Hoentschel, Ran Yan, Ralf Richter
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Publication number: 20140264572Abstract: A method of forming a semiconductor structure can include forming a photolithography mask on a silicon fin having a hard mask layer thereon extending in a first direction. A trench can be formed through the hard mask layer into the silicon fin using the photolithography mask, where the trench extends in a second direction to separate the silicon fin into first and second fin structures extending end-to-end in the first direction. A portion of the trench formed by the hard mask layer can be widened relative to a lower portion of the trench defined by the first and second fin structures.Type: ApplicationFiled: January 28, 2014Publication date: September 18, 2014Inventors: Sung-Min Kim, Ji-Su Kang, Dong-Kyu Lee, Dong-Ho Cha
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Publication number: 20140252475Abstract: A FinFET includes a semiconductor fin including an inner region, and a germanium-doped layer on a top surface and sidewall surfaces of the inner region. The germanium-doped layer has a higher germanium concentration than the inner region. The FinFET further includes a gate dielectric over the germanium-doped layer, a gate electrode over the gate dielectric, a source region connected to a first end of the semiconductor fin, and a drain region connected to a second end of the semiconductor fin opposite the first end. Through the doping of germanium in the semiconductor fin, the threshold voltage may be tuned.Type: ApplicationFiled: March 8, 2013Publication date: September 11, 2014Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventor: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
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Patent number: 8823082Abstract: The present invention is a semiconductor device including a first electrode over a substrate; a pair of oxide semiconductor films in contact with the first electrode; a second electrode in contact with the pair of oxide semiconductor films; a gate insulating film covering at least the first electrode and the pair of oxide semiconductor films; and a third electrode that is in contact with the gate insulating film and is formed at least between the pair of oxide semiconductor films. When the donor density of the oxide semiconductor films is 1.0×1013/cm3 or less, the thickness of the oxide semiconductor films is made larger than the in-plane length of each side of the oxide semiconductor films which is in contact with the first electrode.Type: GrantFiled: August 9, 2011Date of Patent: September 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Makoto Yanagisawa
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Patent number: 8816428Abstract: Methods and systems for forming multigate devices and systems are disclosed. In accordance with one such method, a fin is formed on a semiconductor substrate including a carbon-doped semiconductor layer. Further, a first portion of semiconductor material that is beneath the fin is removed to form a void beneath the fin by etching the material such that the fin is supported by at least one supporting pillar of the semiconducting material and such that the carbon-doped semiconductor layer prevents the etching from removing at least a portion of the fin. A dielectric material is deposited in the void to isolate the fin from a second portion of semiconductor material that is below the void. In addition, source and drain regions are formed in the fin and a gate structure is formed over the fin to fabricate the multigate device such that the dielectric material reduces current leakage beneath the device.Type: GrantFiled: May 30, 2013Date of Patent: August 26, 2014Assignee: International Business Machines CorporationInventors: Robert J. Miller, Tenko Yamashita, Hui Zang
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Patent number: 8809927Abstract: A highly integrated DRAM is provided. A circuit for driving a memory cell array is formed over a substrate, a bit line is formed thereover, and a semiconductor region, word lines, and a capacitor are formed over the bit line. Since the bit line is located below the semiconductor region, and the word lines and the capacitor are located above the semiconductor region, the degree of freedom of the arrangement of the bit line is high. When an open-bit-line DRAM is formed, an area per memory cell less than or equal to 6F2, or when a special structure is employed for a cell transistor, an area per memory cell less than or equal to 4F2 can be achieved.Type: GrantFiled: January 26, 2012Date of Patent: August 19, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yasuhiko Takemura
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Patent number: 8803203Abstract: A transistor includes a substrate, an electrically conductive material layer, and an electrically insulating material layer. At least a portion of one or more of the substrate, the electrically conductive material layer, and the electrically insulating material layer define a reentrant profile.Type: GrantFiled: February 26, 2010Date of Patent: August 12, 2014Assignee: Eastman Kodak CompanyInventors: Lee W. Tutt, Shelby F. Nelson
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Publication number: 20140203238Abstract: In one aspect, a method of fabricating a nanowire FET device includes the following steps. A layer of III-V semiconductor material is formed on an SOI layer of an SOI wafer. Fins are etched into the III-V material and SOI layer. One or more dummy gates are formed over a portion of the fins that serves as a channel region of the device. A gap filler material is deposited onto the wafer. The dummy gates are removed selective to the gap filler material, forming trenches in the gap filler material. The SOI layer is removed from portions of the fins within the trenches thereby forming suspended nanowire channels in the channel regions of the device. The trenches are filled with at least one gate material to form one or more replacement gates surrounding the nanowire channels in a gate-all-around configuration.Type: ApplicationFiled: January 19, 2013Publication date: July 24, 2014Applicant: International Business Machines CorporationInventors: Josephine B. Chang, Isaac Lauer, Jeffrey W. Sleight, Amlan Majumdar
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Publication number: 20140206157Abstract: A method comprises providing a semiconductor structure comprising a substrate and a nanowire above the substrate. The nanowire comprises a first semiconductor material and extends in a vertical direction of the substrate. A material layer is formed above the substrate. The material layer annularly encloses the nanowire. A first part of the nanowire is selectively removed relative to the material layer. A second part of the nanowire is not removed. A distal end of the second part of the nanowire distal from the substrate is closer to the substrate than a surface of the material layer so that the semiconductor structure has a recess at the location of the nanowire. The distal end of the nanowire is exposed at the bottom of the recess. The recess is filled with a second semiconductor material. The second semiconductor material is differently doped than the first semiconductor material.Type: ApplicationFiled: January 23, 2013Publication date: July 24, 2014Applicant: GLOBALFOUNDRIES Inc.Inventors: Tim Baldauf, Stefan Flachowsky, Tom Herrmann, Ralf Illgen
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Patent number: 8779499Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes sheet-like memory strings arranged in a matrix shape substantially perpendicularly to a substrate. A control gate electrode film includes a common connecting section that extends in a first direction and an electrode forming section that is provided for each of memory cells above or below a floating gate electrode film via an inter-electrode dielectric film to project from the common connecting section in a second direction. The floating gate electrode film extends in the second direction and is formed on a first principal plane of a sheet-like semiconductor film via a tunnel dielectric film.Type: GrantFiled: January 18, 2012Date of Patent: July 15, 2014Assignee: Kabushiki Kaisha ToshibaInventor: Masahiro Kiyotoshi
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Publication number: 20140191314Abstract: Semiconductor devices and fabrication methods are provided. A fin can be formed on a semiconductor substrate, a gate can be formed across the fin, and sidewall spacers can be formed across the fin on both sides of the gate. A dummy contact can be formed across the fin and on each of the both sides of the sidewall spacers. After forming an interlayer dielectric layer on the semiconductor substrate, the dummy contact can be removed to form a contact trench. The dummy contact is made of a material having an etch selectivity sufficiently higher than the fin such that the removing of the dummy contact generates substantially no damage to the fin. A conductive material can be filled in the contact trench to form a trench metal contact.Type: ApplicationFiled: November 12, 2013Publication date: July 10, 2014Applicant: Semiconductor Manufacturing International (Shanghai) CorporationInventors: XINPENG WANG, STEVEN ZHANG
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Patent number: 8772863Abstract: A nonvolatile semiconductor memory transistor included in a nonvolatile semiconductor memory includes an island-shaped semiconductor having a source region, a channel region, and a drain region formed in this order from the substrate side, a hollow pillar-shaped charge storage layer arranged so as to surround the outer periphery of the channel region in such a manner that a tunnel insulating film is interposed between the charge storage layer and the channel region, and a hollow pillar-shaped control gate arranged so as to surround the outer periphery of the charge storage layer in such a manner that an insulating film is interposed between the control gate and the charge storage layer. The insulating film is arranged so as to be interposed between the charge storage layer and the upper, lower, and inner side surfaces of the control gate.Type: GrantFiled: December 23, 2013Date of Patent: July 8, 2014Assignee: Unisantis Electronics Singapore Pte. Ltd.Inventors: Fujio Masuoka, Hiroki Nakamura
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Publication number: 20140179069Abstract: A method of fabricating a semiconductor apparatus includes forming an insulating layer on a semiconductor substrate, forming a source post in the insulating layer, and forming a semiconductor layer over the source post and the insulating layer.Type: ApplicationFiled: March 18, 2013Publication date: June 26, 2014Applicant: SK HYNIX INC.Inventors: Young Ho LEE, Seung Beom BAEK
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Publication number: 20140175538Abstract: A semiconductor apparatus includes a semiconductor substrate and a semiconductor layer extending along the substrate in a first direction and connecting to the semiconductor substrate, the semiconductor layer having a portion that connects to the semiconductor substrate, and a portion that does not connect to the semiconductor substrate and forms an active region floating over the semiconductor substrate. A word line formed on the active region and extends in a direction perpendicular to the first direction. Junction regions formed in the active region at both sides of the word line; and an air gap formed in a floating region between the semiconductor substrate and the active region.Type: ApplicationFiled: March 18, 2013Publication date: June 26, 2014Applicant: SK HYNIX INC.Inventors: Hyun Seok KANG, Jeong Tae KIM
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Patent number: 8759167Abstract: An object is to improve field effect mobility of a thin film transistor using an oxide semiconductor. Another object is to suppress increase in off current even in a thin film transistor with improved field effect mobility. In a thin film transistor using an oxide semiconductor layer, by forming a semiconductor layer having higher electrical conductivity and a smaller thickness than the oxide semiconductor layer between the oxide semiconductor layer and a gate insulating layer, field effect mobility of the thin film transistor can be improved, and increase in off current can be suppressed.Type: GrantFiled: November 29, 2012Date of Patent: June 24, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kengo Akimoto, Toshinari Sasaki
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Publication number: 20140167048Abstract: A vertical thin film transistor includes a substrate, a first wall, a second wall, a source electrode, a drain electrode, a semiconductor layer, a gate insulating layer, and a gate electrode. The first wall and the second walls are spaced apart from each other on the substrate. The source electrode is formed on a top surface of the first wall. The drain electrode is provided on the substrate between the first and second walls. The semiconductor layer is formed on the source electrode, a sidewall of the first wall, and the drain electrode. The gate insulating layer covers the first and second walls, the source and drain electrodes, and the semiconductor layer. The gate electrode is disposed between the first and second walls in a planar view. The vertical thin film transistor may be formed without a mask.Type: ApplicationFiled: June 17, 2013Publication date: June 19, 2014Inventor: Jung Hun Lee
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Patent number: 8754470Abstract: A tunneling field-effect transistor (TFET) device is disclosed. A frustoconical protrusion structure is disposed over the substrate and protrudes out of the plane of substrate. Isolation features are formed on the substrate. A drain region is disposed over the substrate adjacent to the frustoconical protrusion structure and extends to a bottom portion of the frustoconical protrusion structure as a raised drain region. A source region is formed as a top portion of the frustoconical protrusion structure. A series connection and a parallel connection are made among TFET devices units.Type: GrantFiled: January 18, 2013Date of Patent: June 17, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Harry-Hak-Lay Chuang, Cheng-Cheng Kuo, Ming Zhu
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Patent number: 8729617Abstract: A semiconductor memory device includes: a lower pillar protruding from a substrate in a vertical direction and extending in a first direction by a trench formed in the first direction; an upper pillar protruding on the lower pillar in a second direction perpendicular to the first direction; a buried bit line junction region disposed on one sidewall of the lower pillar; a buried bit line contacting the buried bit line junction region and filling a portion of the trench; an etch stop film disposed on an exposed surface of the buried bit line; a first interlayer dielectric film recessed to expose a portion of an outer side of at least the upper pillar disposed on the etch stop film; a second interlayer dielectric film disposed on the first interlayer dielectric film; and a gate surrounding the exposed outer side of the upper pillar and crossing the buried bit line.Type: GrantFiled: February 7, 2012Date of Patent: May 20, 2014Assignee: SK Hynix Inc.Inventor: Tae Kyun Kim
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Publication number: 20140134808Abstract: A semiconductor device having a gate positioned in a recess between the source region and a drain region that are adjacent either side of the gate electrode. A channel region is below a majority of the source region as well as a majority of the drain region and the entire gate electrode.Type: ApplicationFiled: January 17, 2014Publication date: May 15, 2014Applicants: International Business Machines Corporation, STMicroelectronics, Inc.Inventors: John H. Zhang, Yiheng Xu, Carl Radens, Lawrence A. Clevenger
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Patent number: 8703566Abstract: A memory device includes an array of memory cells and peripheral devices. At least some of the individual memory cells include carbonated portions that contain SiC. At least some of the peripheral devices do not include any carbonated portions. A transistor includes a first source/drain, a second source/drain, a channel including a carbonated portion of a semiconductive substrate that contains SiC between the first and second sources/drains and a gate operationally associated with opposing sides of the channel.Type: GrantFiled: May 24, 2013Date of Patent: April 22, 2014Assignee: Micron Technology, Inc.Inventor: Chandra Mouli
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Patent number: 8703557Abstract: One method disclosed herein includes forming a plurality of fin-formation trenches in a substrate that defines a plurality of fins, wherein at least one of the fins is a dummy fin, forming an insulating material that fills at least a portion of the trenches, forming a recess in a masking layer formed above the insulating material, forming a sidewall spacer on sidewalls of the recess so as to define a spacer opening, performing at least one first etching process on the masking layer through the spacer opening to define an opening in the masking layer that exposes a portion of the insulating material and the dummy fin, and performing at least one second etching process to remove at least a portion of the dummy fin and thereby define an opening in the insulating material.Type: GrantFiled: April 15, 2013Date of Patent: April 22, 2014Assignees: GLOBALFOUNDRIES Inc., International Business Machines CorporationInventors: Xiuyu Cai, Ruilong Xie, Kangguo Cheng, Ali Khakifirooz
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Publication number: 20140103307Abstract: A vertical thin-film transistor structure includes a substrate, a source electrode, an insulation layer, a drain electrode, two first channel layers, a gate insulation layer and a gate electrode, which are stacked upward in that order on the substrate. The first channel layers are respectively disposed at two opposite ends of the drain electrode, and extend from the upper surface of the drain electrode to the upper surface of the source electrode respectively. Each of the first channel layers contacts the source electrode and the drain electrode. The gate insulation layer is disposed on the source electrode, the first channel layers and the drain electrode. The gate electrode is disposed on the gate insulation layer and covers the first channel layers. Therefore, the volume of the conventional thin-film transistor structure shrinks, and the ratio of the volume of the conventional thin-film transistor structure to that of a pixel structure decreases.Type: ApplicationFiled: July 9, 2013Publication date: April 17, 2014Inventors: Jung-Fang Chang, Ming-Chieh Chang, Jui-Chi Lai
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Patent number: 8691640Abstract: One illustrative method disclosed herein includes forming a plurality of trenches in a semiconductor substrate to thereby define an initial fin structure, forming sidewall spacers adjacent the initial fin structure, wherein the spacers cover a first portion of the initial fin structure and expose a second a portion of the initial fin structure, performing a doping process to form N-type doped regions in at least the exposed portion of the initial fin structure, and performing an etching process to remove at least a portion of the doped regions and thereby define a final fin structure that is vertically spaced apart from the substrate.Type: GrantFiled: January 21, 2013Date of Patent: April 8, 2014Assignee: GLOBALFOUNDRIES Inc.Inventors: Nicholas V. LiCausi, Jeremy A. Wahl
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Patent number: 8679903Abstract: A method is provided for fabricating a vertical insulated gate transistor. A horizontal isolation region is formed in a substrate to separate and electrically isolate upper and lower portions of the substrate. A vertical semiconductor pillar with one or more flanks and a cavity is formed so as to rest on the upper portion, and a dielectrically isolated gate is formed so as to include an internal portion within the cavity and an external portion resting on the flanks and on the upper portion. One or more internal walls of the cavity are coated with an isolating layer and the cavity is filled with a gate material so as to form the internal portion of the gate within the cavity and the external portion of the gate that rests on the flanks, and to form two connecting semiconductor regions extending between source and drain regions of the transistor.Type: GrantFiled: July 27, 2007Date of Patent: March 25, 2014Assignee: STMicroelectronics, Inc.Inventor: Richard A. Blanchard
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Patent number: 8673700Abstract: A power device includes a semiconductor region which in turn includes a plurality of alternately arranged pillars of first and second conductivity type. Each of the plurality of pillars of second conductivity type further includes a plurality of implant regions of the second conductivity type arranged on top of one another along the depth of pillars of second conductivity type, and a trench portion filled with semiconductor material of the second conductivity type directly above the plurality of implant regions of second conductivity type.Type: GrantFiled: April 27, 2011Date of Patent: March 18, 2014Assignee: Fairchild Semiconductor CorporationInventors: Joseph A. Yedinak, Mark L. Rinehimer, Praveen Muraleedharan Shenoy
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Patent number: 8674426Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes a stacked body, a semiconductor pillar and a charge storage layer. The stacked body includes a plurality of insulating films alternately stacked with a plurality of electrode films. The semiconductor pillar is buried in the stacked body, and extends in a stacking direction of the insulating films and the electrode films. The charge storage layer is provided between the electrode films and the semiconductor pillar. The electrode films are divided into a plurality of control gate electrodes. Each of the plurality of control gate electrodes faces the semiconductor pillar and sandwiches the charge storage layer with the semiconductor pillar.Type: GrantFiled: February 8, 2011Date of Patent: March 18, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Masaaki Higuchi, Yoshio Ozawa
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Publication number: 20140064006Abstract: A junctionless semiconductor device having a buried gate, a module and system each having the same, and a method for forming the semiconductor device are disclosed. A source, a drain, and a body of a semiconductor device having a buried gate are doped with the same type of impurities, so that the junctionless semiconductor device does not include a PN junction between the source and the body or between the body and the drain. As a result, a leakage current caused by GIDL is reduced so that operation characteristics of the semiconductor device are improved and the size of a current-flowing region is increased, resulting in an increased operation current.Type: ApplicationFiled: December 20, 2012Publication date: March 6, 2014Applicant: SK hynix Inc.Inventors: Kyung Kyu MIN, Min Soo YOO, Il Woong KWON
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Publication number: 20140054679Abstract: In doping a non-planar semiconductor device, a substrate having a non-planar semiconductor body formed thereon is obtained. A first ion implant is performed in a region of the non-planar semiconductor body. The first ion implant has a first implant energy and a first implant angle. A second ion implant is performed in the same region of the non-planar semiconductor body. The second ion implant has a second implant energy and a second implant angle. The first implant energy may be different from the second implant energy. Additionally, the first implant angle may be different from the second implant angle.Type: ApplicationFiled: August 22, 2012Publication date: February 27, 2014Applicant: ADVANCED ION BEAM TECHNOLOGY, INC.Inventors: Daniel TANG, Tzu-Shih YEN
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Patent number: 8658492Abstract: A semiconductor power device integrated with ESD protection diode is disclosed by offering a dopant out-diffusion suppression layers prior to source dopant activation or diffusion to enhance ESD protection capability between gate and source.Type: GrantFiled: July 6, 2012Date of Patent: February 25, 2014Assignee: Force Mos Technology Co., Ltd.Inventor: Fu-Yuan Hsieh