Introducing A Dopant Into The Channel Region Of Selected Transistors Patents (Class 438/276)
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Patent number: 11183591Abstract: A fin-shaped field-effect transistor (finFET) device is provided. The finFET device includes a substrate material with a first surface and a bottom surface. The finFET device also includes a well region formed in the substrate material. The well region may include a first type of dopant. The finFET device also includes a fin structure disposed on the first surface of the substrate material. A portion of the fin structure may include the first type of dopant. The finFET device also includes an oxide material disposed on the first surface of the substrate material and adjacent to the portion of the fin structure. The finFET device also includes a first epitaxial material disposed over a portion of the fin structure. The first epitaxial material may include a second type of dopant.Type: GrantFiled: October 30, 2019Date of Patent: November 23, 2021Assignee: Avago Technologies International Sales Pte. Ltd.Inventor: Qing Liu
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Patent number: 10553681Abstract: A method includes forming first regions of a first doping type and second regions of a second doping type in first and second semiconductor layers such that the first and second regions are arranged alternately in at least one horizontal direction of the first and second semiconductor layers, and forming a control structure with transistor cells each including at least one body region, at least one source region and at least one gate electrode in the second semiconductor layer. Forming the first and second regions includes: forming trenches in the first semiconductor layer and implanting at least one of first and second type dopant atoms into sidewalls of the trenches; forming the second semiconductor layer on the first semiconductor layer such that the second layer fills the trenches; implanting at least one of first and second type dopant atoms into the second semiconductor layer; and at least one temperature process.Type: GrantFiled: August 17, 2018Date of Patent: February 4, 2020Assignee: Infineon Technologies Austria AGInventors: Hans Weber, Franz Hirler, Maximilian Treiber, Daniel Tutuc, Andreas Voerckel
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Patent number: 10170478Abstract: Aspects of the disclosure include a method for making a semiconductor, including patterning a first transistor having one or more gate stacks on a first source-drain area and second transistor comprising one or more gate stacks on a second source-drain area, forming dielectric spacers on gate stack side walls, depositing a first nitride liner on the first and second transistors. The method also includes masking the second transistor and etching to remove the first nitride material and the spacer from the first source-drain area and growing a first epitaxial layer on the first source-drain area by an epitaxial growth process. The method also includes depositing a second nitride liner on the first and second transistors. The method also includes masking the first transistor. The method also includes etching to remove the second nitride material from the second source-drain area and growing a second epitaxial layer on the second source-drain area by an epitaxial growth process.Type: GrantFiled: October 19, 2016Date of Patent: January 1, 2019Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Soon-Cheon Seo
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Patent number: 10083873Abstract: The present disclosure relates to semiconductor structures and, more particularly, to semiconductor structures with uniform gate heights and methods of manufacture. The structure includes: short channel devices in a first area of an integrated circuit die; and long channel devices in a second area of the integrated circuit die. The long channel devices have a same gate height as the short channel devices.Type: GrantFiled: June 5, 2017Date of Patent: September 25, 2018Assignee: GLOBALFOUNDRIES Inc.Inventors: Xing Zhang, Xinyuan Dou, Hong Yu, Zhenyu Hu
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Patent number: 9905463Abstract: According to an embodiment of the present invention, self-aligned gate cap, comprises a gate located on a substrate; a gate cap surrounding a side of the gate; a contact region self-aligned to the gate; and a low dielectric constant oxide having a dielectric constant of less than 3.9 located on top of the gate. According to an embodiment of the present invention, a method of forming a self-aligned contact comprises removing at least a portion of an interlayer dielectric layer to expose a top surface of a gate cap located on a substrate; recessing the gate cap to form a recessed area; depositing a low dielectric constant oxide having a dielectric constant of less than 3.9 in the recessed area; and polishing a surface of the low dielectric constant oxide to expose a contact area.Type: GrantFiled: December 15, 2015Date of Patent: February 27, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Balasubramanian Pranatharthiharan, Injo Ok, Charan V. V. S. Surisetty
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Patent number: 9627268Abstract: A method for fabricating semiconductor device is disclosed. The method includes the steps of: providing a substrate having a fin-shaped structure thereon and a shallow trench isolation (STI) around the fin-shaped structure, in which the fin-shaped structure has a top portion and a bottom portion; forming a first doped layer on the STI and the top portion; and performing a first anneal process.Type: GrantFiled: October 15, 2015Date of Patent: April 18, 2017Assignee: UNITED MICROELECTRONICS CORP.Inventors: Ching-Yu Chang, Li-Wei Feng, Shih-Hung Tsai, Ssu-I Fu, Jyh-Shyang Jenq, Chien-Ting Lin, Yi-Ren Chen, Shou-Wei Hsieh, Hsin-Yu Chen, Chun-Hao Lin
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Patent number: 9450097Abstract: A method of doping a fin field-effect transistor includes forming a plurality of semiconductor fins on a substrate wherein each semiconductor fin of the plurality of semiconductor fins has a top surface and sidewalls. The method includes forming a gate stack over the top surface and sidewalls of each semiconductor fin. The method includes removing a portion of a first semiconductor fin exposed by the gate stack. The method includes growing a first stressor region connected to a remaining portion of the first semiconductor fin. The method includes exposing a second semiconductor fin to a deposition process to form a dopant-rich layer comprising an n-type or a p-type dopant on the top surface and the sidewalls of the second semiconductor fin. The method includes diffusing the dopant from the dopant-rich layer into the second semiconductor fin using an annealing process.Type: GrantFiled: November 17, 2015Date of Patent: September 20, 2016Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Chun Hsiung Tsai, Yu-Lien Huang, De-Wei Yu
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Patent number: 9343288Abstract: To increase the degree of integration of a semiconductor device such as a DCDC converter. In a semiconductor device (e.g., DCDC converter) including a controller circuit and a switching transistor, the switching transistor formed using an oxide semiconductor layer is stacked over a substrate on which the controller circuit is formed. The switching transistor includes a backgate to release heat generated in the oxide semiconductor layer. The backgate has electrical conduction with a wiring to release heat and prevent a temperature increase with integration. Moreover, for power saving, a potential hold portion including a transistor and a capacitor may be formed using part of the oxide semiconductor layer over the controller circuit. The potential hold portion is formed in a circuit for generating a bias potential in the controller circuit.Type: GrantFiled: July 29, 2014Date of Patent: May 17, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Kei Takahashi
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Patent number: 9318550Abstract: A semiconductor device includes a first gate electrode structure, a second gate electrode structure, a device separation structure, and cell separation structures. The first gate electrode structure is buried in a semiconductor portion in a first cell array at a distance to a first surface of the semiconductor portion. The first gate electrode structure includes parallel array stripes. The second gate electrode structure is buried in the semiconductor portion in a second cell array adjacent to the first cell array. The second gate electrode structure includes parallel array stripes. The device separation structure is between the first and second cell arrays. The device separation structure has a first width. The cell separation structures have at most a second width smaller than the first width and notching, at the first surface, semiconductor fins formed from sections of the semiconductor portion between the array trenches.Type: GrantFiled: February 19, 2015Date of Patent: April 19, 2016Assignee: Infineon Technologies Dresden GmbHInventors: Marko Lemke, Rolf Weis, Stefan Tegen
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Patent number: 9257506Abstract: A method for forming a semiconductor structure includes providing a semiconductor substrate including a first region and a second region; and forming a first and a second metal-oxide-semiconductor (MOS) device. The step of forming the first MOS device includes forming a first silicon germanium layer over the first region of the semiconductor substrate; forming a silicon layer over the first silicon germanium layer; forming a first gate dielectric layer over the silicon layer; and patterning the first gate dielectric layer to form a first gate dielectric. The step of forming the second MOS device includes forming a second silicon germanium layer over the second region of the semiconductor substrate; forming a second gate dielectric layer over the second silicon germanium layer with no substantially pure silicon layer therebetween; and patterning the second gate dielectric layer to form a second gate dielectric.Type: GrantFiled: July 8, 2011Date of Patent: February 9, 2016Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Ding-Yuan Chen, Chen-Hua Yu
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Patent number: 9252236Abstract: A method for improving analog gain in long channel devices associated with a semiconductor workpiece is provided. A gate oxide layer is formed on the semiconductor workpiece, and a plurality of gate structures are formed over the gate oxide layer, wherein a first pair of the plurality of gate structures define a short channel device region and a second pair of the plurality of gate structures define a long channel device region. A first ion implantation with a first dopant is performed at a first angle, wherein the first dopant is one of an n-type dopant and a p-type dopant. A second ion implantation with a second dopant is performed at a second angle, wherein the second angle is greater than the first angle. The second dopant is one or an n-type dopant and a p-type dopant that is opposite of the first dopant, and a height of the plurality of gate structures and the second angle generally prevents the second ion implantation from implanting ions into the short channel device region.Type: GrantFiled: March 24, 2014Date of Patent: February 2, 2016Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Shih-Syuan Huang, Tsung-Hsing Yu, Yi-Ming Sheu
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Patent number: 9184250Abstract: A semiconductor arrangement and methods of formation are provided. The semiconductor arrangement includes a first contact having first contact dimensions that are relative to first gate dimensions of at least one of a first gate or a second gate, where relative refers to a specific relationship between the first contact dimensions and the first gate dimensions. The first contact is between the first gate and the second gate. The first contact having the first contact dimensions relative to the first gate dimensions has lower resistance with little to no increased capacitance, as compared to a semiconductor arrangement having first contact dimensions not in accordance with the specific relationship. The semiconductor arrangement having the lower resistance with little to no increased capacitance exhibits at least one of improved performance or reduced power requirements than a semiconductor arrangement that does not have such lower resistance with little to no increased capacitance.Type: GrantFiled: May 29, 2014Date of Patent: November 10, 2015Assignee: Taiwan Semiconductor Manufacturing Company LimitedInventors: Chih-Liang Chen, Helen Shu-Hui Chang, Charles Chew-Yuen Young, Jiann-Tyng Tzeng, Kam-Tou Sio, Wei-Cheng Lin
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Publication number: 20150145063Abstract: A method including providing a semiconductor substrate including a first semiconductor device and a second semiconductor device, the first and second semiconductor devices including dummy spacers, dummy gates, and extension regions; protecting the second semiconductor device with a mask; removing the dummy spacers from the first semiconductor device; and depositing in-situ doped epitaxial regions on top of the extension regions of the first semiconductor device.Type: ApplicationFiled: December 4, 2014Publication date: May 28, 2015Inventors: Thomas N. Adam, Kangguo Cheng, Bruce B. Doris, Ali Khakifirooz, Alexander Reznicek
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Patent number: 9034709Abstract: A method for manufacturing a semiconductor device, includes forming a first gate oxide film in each of a first region and a second region by thermally oxidizing a silicon substrate, forming a CVD oxide film on the first gate oxide film, implanting fluorine into each of the first region and the second region through the CVD oxide film and the first gate oxide film, removing the CVD oxide film from the first gate oxide film in the second region, removing the first gate oxide film from the second region, and forming a second gate oxide film in the second region by thermally oxidizing the silicon substrate.Type: GrantFiled: February 20, 2013Date of Patent: May 19, 2015Assignee: Asahi Kasei Microdevices CorporationInventors: Shogo Katsuki, Toshiro Sakamoto
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Publication number: 20150091097Abstract: Approaches for providing a hardmask used during a halo/extension implant of a static random access memory (SRAM) layout for a semiconductor device are disclosed. Specifically, approaches are provided for forming a pull-down (PD) transistor over a substrate; forming a pass-gate (PG) transistor over the substrate; and patterning a hardmask over the device, the hardmask including a first section adjacent the PD transistor and a second section adjacent the PG transistor, wherein a distance between the first section and the PD transistor is shorter than a distance between the second section and the PG transistor. The respective distances between the first section and the PD transistor, and the second section and the PG transistor, are selected to prevent a halo/extension implant from impacting one side of the PD transistor, while allowing the halo/extension implant to impact both sides of the PG transistor.Type: ApplicationFiled: October 2, 2013Publication date: April 2, 2015Applicant: GLOBALFOUNDRIES Inc.Inventors: Xusheng Wu, Bingwu Liu, Randy Mann
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Patent number: 8981530Abstract: A semiconductor device includes a first NMOS device with a first threshold voltage and a second NMOS device with a second threshold voltage. The first NMOS device includes a first gate structure over a semiconductor substrate, first source/drain (S/D) regions in the semiconductor substrate and adjacent to opposite edges of the first gate structure. The first S/D regions are free of dislocation. The second NMOS device includes a second gate structure over the semiconductor substrate, second S/D regions in the semiconductor substrate and adjacent to opposite edges of the second gate structure, and a dislocation in the second S/D regions.Type: GrantFiled: November 8, 2012Date of Patent: March 17, 2015Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Harry-Hak-Lay Chuang, Ming Zhu
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Patent number: 8981490Abstract: A method of fabricating a CMOS integrated circuit (IC) includes implanting a first n-type dopant at a first masking level that exposes a p-region of a substrate surface having a first gate stack thereon to form NLDD regions for forming n-source/drain extension regions for at least a portion of a plurality of n-channel MOS (NMOS) transistors on the IC. A p-type dopant is implanted at a second masking level that exposes an n-region in the substrate surface having a second gate stack thereon to form PLDD regions for at least a portion of a plurality of p-channel MOS (PMOS) transistors on the IC. A second n-type dopant is retrograde implanted including through the first gate stack to form a deep nwell (DNwell) for the portion of NMOS transistors. A depth of the DNwell is shallower below the first gate stack as compared to under the NLDD regions.Type: GrantFiled: March 14, 2013Date of Patent: March 17, 2015Assignee: Texas Instruments IncorporatedInventor: Mahalingam Nandakumar
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Patent number: 8937358Abstract: An integrated circuit includes a first and a second standard cell. The first standard cell includes a first gate electrode, and a first channel region underlying the first gate electrode. The first channel region has a first channel doping concentration. The second standard cell includes a second gate electrode, and a second channel region underlying the second gate electrode. The second channel region has a second channel doping concentration. A dummy gate includes a first half and a second half in the first and the second standard cells, respectively. The first half and the second half are at the edges of the first and the second standard cells, respectively, and are abutted to each other. A dummy channel is overlapped by the dummy gate. The dummy channel has a third channel doping concentration substantially equal to a sum of the first channel doping concentration and the second channel doping concentration.Type: GrantFiled: April 30, 2013Date of Patent: January 20, 2015Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Kuo-Nan Yang, Chou-Kun Lin, Jerry Chang-Jui Kao, Yi-Chuin Tsai, Chien-Ju Chao, Chung-Hsing Wang
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Patent number: 8921181Abstract: Methods for forming an electronic device having a fluorine-stabilized semiconductor substrate surface are disclosed. In an exemplary embodiment, a layer of a high-? dielectric material is formed together with a layer containing fluorine on a semiconductor substrate. Subsequent annealing causes the fluorine to migrate to the surface of the semiconductor (for example, silicon, germanium, or silicon-germanium). A thin interlayer of a semiconductor oxide may also be present at the semiconductor surface. The fluorine-containing layer can comprise F-containing WSix formed by ALD from WF6 and SiH4 precursor gases. A precise amount of F can be provided, sufficient to bind to substantially all of the dangling semiconductor atoms at the surface of the semiconductor substrate and sufficient to displace substantially all of the hydrogen atoms present at the surface of the semiconductor substrate.Type: GrantFiled: December 27, 2012Date of Patent: December 30, 2014Assignee: Intermolecular, Inc.Inventor: Dipankar Pramanik
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Patent number: 8916928Abstract: When forming sophisticated multiple gate transistors and planar transistors in a common manufacturing sequence, the threshold voltage characteristics of the multiple gate transistors may be intentionally “degraded” by selectively incorporating a dopant species into corner areas of the semiconductor fins, thereby obtaining a superior adaptation of the threshold voltage characteristics of multiple gate transistors and planar transistors. In advantageous embodiments, the incorporation of the dopant species may be accomplished by using the hard mask, which is also used for patterning the self-aligned semiconductor fins.Type: GrantFiled: September 27, 2013Date of Patent: December 23, 2014Assignee: GLOBALFOUNDRIES Inc.Inventors: Tim Baldauf, Andy Wei, Tom Herrmann, Stefan Flachowsky, Ralf Illgen
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Publication number: 20140339646Abstract: The present description relates to the field of fabricating microelectronic devices having non-planar transistors. Embodiments of the present description relate to the doping of fins within non-planar transistors, wherein a conformal blocking material layer, such as a dielectric material, may be used to achieve a substantially uniform doping throughout the non-planar transistor fins.Type: ApplicationFiled: September 30, 2011Publication date: November 20, 2014Inventors: Subhash M. Joshi, Michael Hattendorf
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Patent number: 8883597Abstract: The present disclosure provides a method of fabricating a FinFET element including providing a substrate including a first fin and a second fin. A first layer is formed on the first fin. The first layer comprises a dopant of a first type. A dopant of a second type is provided to the second fin. High temperature processing of the substrate is performed on the substrate including the formed first layer and the dopant of the second type.Type: GrantFiled: July 31, 2007Date of Patent: November 11, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Cheng-Hung Chang, Chen-Hua Yu, Chen-Nan Yeh, Chu-Yun Fu, Yu-Rang Hsu, Ding-Yuan Chen
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Patent number: 8878287Abstract: The present invention provides an FET which includes an epitaxial layer and first and second body regions formed over the epitaxial layer. Further, the FET includes a first trench formed in the epitaxial layer between the first and the second body regions. The FET also includes a conductive layer formed on the sidewall of the first trench. The conductive layer acts as gate of the FET. The FET also includes a second trench formed at the bottom of the first trench, a first dielectric layer formed over the conductive layer and on the sidewall of the second trench, and a second dielectric layer formed on the first dielectric layer. Further, the FET includes a conductive layer, which acts as drain, deposited in the first and the second trenches. The FET also includes first and a second source regions formed in the first and second body regions, respectively.Type: GrantFiled: April 12, 2012Date of Patent: November 4, 2014Assignee: Micrel, Inc.Inventor: Paul McKay Moore
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Patent number: 8860137Abstract: RF transistors are fabricated at complete wafer scale using a nanotube deposition technique capable of forming high-density, uniform semiconducting nanotube thin films at complete wafer scale, and electrical characterization reveals that such devices exhibit gigahertz operation, linearity, and large transconductance and current drive.Type: GrantFiled: June 8, 2012Date of Patent: October 14, 2014Assignee: University of Southern CaliforniaInventors: Chongwu Zhou, Koungmin Ryu, Alexander Badmaev, Chuan Wang
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Patent number: 8846476Abstract: One illustrative method disclosed herein involves forming an integrated circuit product comprised of first and second N-type transistors formed in and above first and second active regions, respectively. The method generally involves performing a common threshold voltage adjusting ion implantation process on the first and second active regions, forming the first and second transistors, performing an amorphization ion implantation process to selectively form regions of amorphous material in the first active region but not in the second active region, after performing the amorphization ion implantation process, forming a capping material layer above the first and second transistors and performing a re-crystallization anneal process to convert at least portions of the regions of amorphous material to a crystalline material. In some cases, the capping material layer may be formed of a material having a Young's modulus of at least 180 GPa.Type: GrantFiled: February 14, 2013Date of Patent: September 30, 2014Assignee: GLOBALFOUNDRIES Inc.Inventors: Yanxiang Liu, Manfred Eller, Johannes van Meer
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Patent number: 8846474Abstract: Embodiments of the invention provide dual workfunction semiconductor devices and methods for manufacturing thereof. According to one embodiment, the method includes providing a substrate containing first and second device regions, depositing a dielectric film on the substrate, and forming a first metal-containing gate electrode film on the dielectric film, wherein a thickness of the first metal-containing gate electrode film is less over the first device region than over the second device region. The method further includes depositing a second metal-containing gate electrode film on the first metal-containing gate electrode film, patterning the second metal-containing gate electrode film, the first metal-containing gate electrode film, and the dielectric film to form a first gate stack above the first device region and a second gate stack above the second device region.Type: GrantFiled: September 30, 2012Date of Patent: September 30, 2014Assignee: Tokyo Electron LimitedInventors: Genji Nakamura, Toshio Hasegawa
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Publication number: 20140264552Abstract: A memory cell can include at least a first programmable section coupled between a supply node and a first data node; a volatile storage circuit coupled to the first data node; and the programmable section includes a programmable transistor having a first source/drain (S/D) region shared with a first transistor, and a second S/D region shared with a second transistor; wherein the first S/D region has a different dopant diffusion profile than the second S/D region, and the programmable transistor has a charge storage structure formed between its control gate and its channel. Methods of forming such a memory cell are also disclosed.Type: ApplicationFiled: March 12, 2013Publication date: September 18, 2014Applicant: CYPRESS SEMICONDUCTOR CORPORATIONInventors: Venkatraman Prabhakar, Kaveh Shakeri, Long Hinh, Sarath C. Puthenthermadam
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Patent number: 8828851Abstract: An SOI substrate has a first region isolated from a second region. An SiGe layer is deposited on top of the SOI substrate in the second region. The substrate is subjected to a thermal oxidation process which drives in Ge from the SiGe layer to form an SiGeOI structure in the second region and an overlying oxide layer. If the SOI substrate is exposed in the first region, the thermal oxidation process further produces an oxide layer overlying the first region. The oxide layer(s) is(are) removed to expose an Si channel layer in the first region and an SiGe channel layer in the second region. Transistor gate stacks are formed over each of the Si channel layer and SiGe channel layer. Raised source and drain regions are formed from the Si channel layer and SiGe channel layer adjacent the transistor gate stacks.Type: GrantFiled: June 4, 2012Date of Patent: September 9, 2014Assignee: STMicroeletronics, Inc.Inventors: Nicolas Loubet, Prasanna Khare, Qing Liu
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Patent number: 8829623Abstract: According to an aspect of the present invention, there is provided a semiconductor memory device including: a semiconductor substrate having: a contact region; a select gate region; and a memory cell region; a first element isolation region formed in the contact region and having a first depth; a second element isolation region formed in the select gate region and having a second depth; and a third element isolation region formed in the memory cell region and having a third depth which is smaller than the first depth.Type: GrantFiled: October 9, 2008Date of Patent: September 9, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Nobutoshi Aoki, Takashi Izumida, Masaki Kondo, Fumitaka Arai
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Patent number: 8809855Abstract: When a semiconductor device including a transistor in which a gate electrode layer, a gate insulating film, and an oxide semiconductor film are stacked and a source and drain electrode layers are provided in contact with the oxide semiconductor film is manufactured, after the formation of the gate electrode layer or the source and drain electrode layers by an etching step, a step of removing a residue remaining by the etching step and existing on a surface of the gate electrode layer or a surface of the oxide semiconductor film and in the vicinity of the surface is performed. The surface density of the residue on the surface of the oxide semiconductor film or the gate electrode layer can be 1×1013 atoms/cm2 or lower.Type: GrantFiled: October 15, 2012Date of Patent: August 19, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Masahiko Hayakawa, Tatsuya Honda
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Patent number: 8809986Abstract: Provided is a semiconductor device capable of reducing a temperature-dependent variation of a current sense ratio and accurately detecting current. In the semiconductor device, at least one of an impurity concentration and a thickness of each semiconductor layer is adjusted such that a value calculated by a following equation is less than a predetermined value: [ ? i = 1 n ? ( R Mi × k Mi ) - ? i = 1 n ? ( R Si × k Si ) ] / ? i = 1 n ? ( R Mi × k Mi ) where a temperature-dependent resistance changing rate of an i-th semiconductor layer (i=1 to n) of the main element domain is RMi; a resistance ratio of the i-th semiconductor layer of the main element domain relative to the entire main element domain is kMi; a temperature-dependent resistance changing rate of the i-th semiconductor layer of the sense element domain is RSi; and a resistance ratio of the i-th semiconductor layer of the sense element domain to the entire sense element domain is kSi.Type: GrantFiled: May 29, 2009Date of Patent: August 19, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hidefumi Takaya, Kimimori Hamada, Yuji Nishibe
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Publication number: 20140227845Abstract: One illustrative method disclosed herein involves forming an integrated circuit product comprised of first and second N-type transistors formed in and above first and second active regions, respectively. The method generally involves performing a common threshold voltage adjusting ion implantation process on the first and second active regions, forming the first and second transistors, performing an amorphization ion implantation process to selectively form regions of amorphous material in the first active region but not in the second active region, after performing the amorphization ion implantation process, forming a capping material layer above the first and second transistors and performing a re-crystallization anneal process to convert at least portions of the regions of amorphous material to a crystalline material. In some cases, the capping material layer may be formed of a material having a Young's modulus of at least 180 GPa.Type: ApplicationFiled: February 14, 2013Publication date: August 14, 2014Applicant: GLOBALFOUNDRIES INC.Inventors: Yanxiang Liu, Manfred Eller, Johannes van Meer
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Patent number: 8779527Abstract: A method and circuit in which the drive strength of a FinFET transistor can be selectively modified, and in particular can be selectively reduced, by omitting the LDD extension formation in the source and/or in the drain of the FinFET. One application of this approach is to enable differentiation of the drive strengths of transistors in an integrated circuit by applying the technique to some, but not all, of the transistors in the integrated circuit. In particular in a SRAM cell formed from FinFET transistors the application of the technique to the pass-gate transistors, which leads to a reduction of the drive strength of the pass-gate transistors relative to the drive strength of the pull-up and pull-down transistors, results in improved SRAM cell performance.Type: GrantFiled: October 8, 2012Date of Patent: July 15, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Thomas Merelle, Gerben Doornbos, Robert James Pascoe Lander
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Patent number: 8765559Abstract: When forming sophisticated gate electrode structures, such as high-k metal gate electrode structures, an appropriate encapsulation may be achieved, while also undue material loss of a strain-inducing semiconductor material that is provided in one type of transistor may be avoided. To this end, the patterning of the protective spacer structure prior to depositing the strain-inducing semiconductor material may be achieved for each type of transistor on the basis of the same process flow, while, after the deposition of the strain-inducing semiconductor material, an etch stop layer may be provided so as to preserve integrity of the active regions.Type: GrantFiled: January 25, 2012Date of Patent: July 1, 2014Assignee: GLOBALFOUNDRIES Inc.Inventors: Stephan Kronholz, Gunda Beernink, Markus Lenski, Frank Seliger, Frank Richter
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Patent number: 8753937Abstract: The present invention provides a manufacturing method of a power transistor device. First, a semiconductor substrate of a first conductivity type is provided, and at least one trench is formed in the semiconductor substrate. Next, the trench is filled with a dopant source layer, and a first thermal drive-in process is performed to form two doped diffusion regions of a second conductivity type in the semiconductor substrate, wherein the doping concentration of each doped diffusion region close to the trench is different from the one of each doped diffusion region far from the trench. Then, the dopant source layer is removed and a tilt-angle ion implantation process and a second thermal drive-in process are performed to adjust the doping concentration of each doped diffusion region close to the trench.Type: GrantFiled: July 19, 2012Date of Patent: June 17, 2014Assignee: Anpec Electronics CorporationInventors: Yung-Fa Lin, Shou-Yi Hsu, Meng-Wei Wu, Chia-Hao Chang
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Patent number: 8753932Abstract: A memory cell having N transistors including at least one pair of access transistors, one pair of pull-down transistors, and one pair of pull-up transistors to form a memory cell, wherein N is an integer at least equal to six, wherein each of the access transistors and each of the pull-down transistors is a same one of an n-type or a p-type transistor, and each of the pull-up transistors is the other of an n-type or a p-type transistor, wherein at least one of the pair of the pull down transistors and the pair of the pull up transistors are asymmetric.Type: GrantFiled: March 26, 2012Date of Patent: June 17, 2014Assignee: International Business Machines CorporationInventors: Leland Chang, Jeffrey W. Sleight
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Publication number: 20140131811Abstract: A semiconductor device of an embodiment includes: a first transistor having a first source region and a first drain region arranged in a first protruded semiconductor region, a first channel region having a first corner portion in its upper portion in a section perpendicular to a first direction, the first corner portion having a first radius of curvature; a second transistor having a second source region and a second drain region arranged in a second protruded semiconductor region, and a second channel region having a second corner portion in its upper portion in a section that is perpendicular to a second direction, the second corner portion having a second radius of curvature greater than the first radius of curvature.Type: ApplicationFiled: November 6, 2013Publication date: May 15, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masumi SAITOH, Kensuke OTA, Toshinori NUMATA, Chika TANAKA, Shinichi YASUDA, Kosuke TATSUMURA, Koichiro ZAITSU
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Patent number: 8723248Abstract: In one embodiment, there is provided a nonvolatile semiconductor storage device. The device includes: a plurality of nonvolatile memory cells. Each of the nonvolatile memory cells includes: a first semiconductor layer including a first source region, a first drain region, and a first channel region; a block insulating film formed on the first channel region; a charge storage layer formed on the block insulating film; a tunnel insulating film formed on the charge storage layer; a second semiconductor layer formed on the tunnel insulating film and including a second source region, a second drain region, and a second channel region. The second channel region is formed on the tunnel insulating film such that the tunnel insulating film is located between the second source region and the second drain region. A dopant impurity concentration of the first channel region is higher than that of the second channel region.Type: GrantFiled: February 24, 2012Date of Patent: May 13, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Naoki Yasuda, Jun Fujiki
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Patent number: 8722482Abstract: A semiconductor is formed on a (110) silicon (Si) substrate, with improved electron mobility. Embodiments include semiconductor devices having a silicon carbide (SiC) portion in the nFET channel region. An embodiment includes forming an nFET channel region and a pFET channel region in a Si substrate, such as a (110) Si substrate, and forming a silicon carbide (SiC) portion on the nFET channel region. The SiC portion may be formed by ion implantation of C followed by a recrystallization anneal or by epitaxial growth of SiC in a recess formed in the substrate. The use of SiC in the nFET channel region improves electron mobility without introducing topographical differences between NMOS and PMOS transistors.Type: GrantFiled: March 18, 2010Date of Patent: May 13, 2014Assignee: GlobalFoundries Inc.Inventors: Jeremy A. Wahl, Kingsuk Maitra
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Publication number: 20140120674Abstract: An integrated circuit, in which a minimum gate length of low-noise NMOS transistors is less than twice a minimum gate length of logic NMOS transistors, is formed by: forming gates of the low-noise NMOS transistors concurrently with gates of the logic NMOS transistors, forming a low-noise NMDD implant mask which exposes the low-noise NMOS transistors and covers the logic NMOS transistors and logic PMOS transistors, ion implanting n-type NMDD dopants and fluorine into the low-noise NMOS transistors and limiting p-type halo dopants to less than 20 percent of a corresponding logic NMOS halo dose, removing the low-noise NMDD implant mask, forming a logic NMDD implant mask which exposes the logic NMOS transistors and covers the low-noise NMOS transistors and logic PMOS transistors, ion implanting n-type NMDD dopants and p-type halo dopants, but not implanting fluorine, into the logic NMOS transistors, and removing the logic NMDD implant mask.Type: ApplicationFiled: January 7, 2014Publication date: May 1, 2014Applicant: Texas Instruments IncorporatedInventors: Alwin James TSAO, Purushothaman SRINIVASAN
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Publication number: 20140120675Abstract: A method of forming an integrated circuit (IC) including a core and a non-core PMOS transistor includes forming a non-core gate structure including a gate electrode on a gate dielectric and a core gate structure including a gate electrode on a gate dielectric. The gate dielectric for the non-core gate structure is at least 2 ? of equivalent oxide thickness (EOT) thicker as compared to the gate dielectric for the core gate structure. P-type lightly doped drain (PLDD) implantation including boron establishes source/drain extension regions in the substrate. The PLDD implantation includes selective co-implanting of carbon and nitrogen into the source/drain extension region of the non-core gate structure. Source and drain implantation forms source/drain regions for the non-core and core gate structure, wherein the source/drain regions are distanced from the non-core and core gate structures further than their source/drain extension regions. Source/drain annealing is performed after source and drain implantation.Type: ApplicationFiled: January 7, 2014Publication date: May 1, 2014Applicant: Texas Instruments IncorporatedInventors: Mahalingam NANDAKUMAR, Amitabh JAIN
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Publication number: 20140110783Abstract: A method of forming a device is disclosed. A substrate having a high gain (HG) device region for a HG transistor is provided. A HG gate is formed on the substrate in the HG device region. The HG gate includes sidewall spacers on its sidewalls. Heavily doped regions are formed adjacent to the HG gate. Inner edges of the heavily doped regions are aligned with about outer edges of the sidewall spacers of the HG gate. The heavily doped regions serve as HG source/drain (S/D) regions of the HG gate. The HG S/D regions do not include lightly doped drain (LDD) regions or halo regions.Type: ApplicationFiled: October 18, 2012Publication date: April 24, 2014Applicant: GLOBALFOUNDRIES SINGAPORE PTE. LTD.Inventor: Guowei ZHANG
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Publication number: 20140094009Abstract: A semiconductor device and method for fabricating a semiconductor device is disclosed. An exemplary semiconductor device includes a substrate including a metal oxide device. The metal oxide device includes first and second doped regions disposed within the substrate and interfacing in a channel region. The first and second doped regions are doped with a first type dopant. The first doped region has a different concentration of dopant than the second doped region. The metal oxide device further includes a gate structure traversing the channel region and the interface of the first and second doped regions and separating source and drain regions. The source region is formed within the first doped region and the drain region is formed within the second doped region. The source and drain regions are doped with a second type dopant. The second type dopant is opposite of the first type dopant.Type: ApplicationFiled: December 13, 2013Publication date: April 3, 2014Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Yue-Der Chih, Jam-Wem Lee, Cheng-Hsiung Kuo, Tsung-Che Tsai, Ming-Hsiang Song, Hung-Cheng Sung, Hung Cho Wang
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Patent number: 8686514Abstract: A field effect transistor device includes a first conductive channel disposed on a substrate, a second conductive channel disposed on the substrate, a first gate stack formed on the first conductive channel, the first gate stack including a metallic layer having a first oxygen content, a second gate stack a formed on the second conductive channel, the second gate stack including a metallic layer having a second oxygen, an ion doped source region connected to the first conductive channel and the second conductive channel, and an ion doped drain region connected to the first conductive channel and the second conductive channel.Type: GrantFiled: July 27, 2012Date of Patent: April 1, 2014Assignee: International Business Machines CorporationInventors: Dechao Guo, Keith Kwong Hon Wong
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Patent number: 8643137Abstract: A short channel Lateral MOSFET (LMOS) and method are disclosed with interpenetrating drain-body protrusions (IDBP) for reducing channel-on resistance while maintaining high punch-through voltage. The LMOS includes lower device bulk layer; upper source and upper drain region both located atop lower device bulk layer; both upper source and upper drain region are in contact with an intervening upper body region atop lower device bulk layer; both upper drain and upper body region are shaped to form a drain-body interface; the drain-body interface has an IDBP structure with a surface drain protrusion lying atop a buried body protrusion while revealing a top body surface area of the upper body region; gate oxide-gate electrode bi-layer disposed atop the upper body region forming an LMOS with a short channel length defined by the horizontal length of the top body surface area delineated between the upper source region and the upper drain region.Type: GrantFiled: June 4, 2012Date of Patent: February 4, 2014Assignee: Alpha & Omega Semiconductor, Inc.Inventors: Shekar Mallikarjunaswamy, Amit Paul
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Patent number: 8633075Abstract: A method for manufacturing a semiconductor includes: forming an isolation region defining first, second and third active regions; implanting first impurity ions of a first conductivity type to form first, second and third wells; implanting second impurity ions of the first conductivity type to form first and second channel regions; implanting second impurity ions of a second conductivity to form a first drain region, such that a portion of the first channel region is overlapped with the first drain region; forming first, second and third gate electrodes, the first gate electrode superposing a portion of the first drain region and covering one lateral end of the first channel region; forming first insulating side wall spacers and a second insulating side wall spacer on a side wall of the first gate electrode; and implanting fourth impurity ions of the second conductivity type to form second drain/source regions.Type: GrantFiled: March 12, 2013Date of Patent: January 21, 2014Assignee: Fujitsu Semiconductor LimitedInventor: Masashi Shima
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Publication number: 20130323892Abstract: One illustrative method disclosed herein involves forming first and second gate structures that include a cap layer for a first transistor device and a second transistor device, respectively, wherein the first and second transistors are oriented transverse to one another, performing a first halo ion implant process to form first halo implant regions for the first transistor with the cap layer in position in the first gate structure of the first transistor, removing the cap layer from at least the second gate structure of the second transistor and, after removing the cap layer, performing a second halo ion implant process to form second halo implant regions for the second transistor, wherein the first and second halo implant processes are performed at transverse angles relative to the substrate.Type: ApplicationFiled: June 4, 2012Publication date: December 5, 2013Applicant: GLOBALFOUNDRIES INC.Inventors: Stefan Flachowsky, Jan Hoentschel, Thilo Scheiper
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Patent number: 8598006Abstract: An embedded epitaxial semiconductor portion having a different composition than matrix of the semiconductor substrate is formed with a lattice mismatch and epitaxial alignment with the matrix of the semiconductor substrate. The temperature of subsequent ion implantation steps is manipulated depending on the amorphizing or non-amorphizing nature of the ion implantation process. For a non-amorphizing ion implantation process, the ion implantation processing step is performed at an elevated temperature, i.e., a temperature greater than nominal room temperature range. For an amorphizing ion implantation process, the ion implantation processing step is performed at nominal room temperature range or a temperature lower than nominal room temperature range. By manipulating the temperature of ion implantation, the loss of strain in a strained semiconductor alloy material is minimized.Type: GrantFiled: March 16, 2010Date of Patent: December 3, 2013Assignees: International Business Machines Corporation, Toshiba America Electronic Components, Inc.Inventors: Joel P. de Souza, Masafumi Hamaguchi, Ahmet S. Ozcan, Devendra K. Sadana, Katherine L. Saenger, Donald R. Wall
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Patent number: 8598005Abstract: A method and manufacture for memory device fabrication is provided. Spacer formation and junction formation is performed on both: a memory cell region in a core section of a memory device in fabrication, and a high-voltage device region in a periphery section of the memory device in fabrication. The spacer formation and junction formation on both the memory cell region and the high-voltage device region includes performing a rapid thermal anneal. After performing the spacer formation and junction formation on both the memory cell region and the high-voltage device region, spacer formation and junction formation is performed on a low-voltage device region in the periphery section.Type: GrantFiled: July 18, 2011Date of Patent: December 3, 2013Assignee: Spansion LLCInventors: Simon Siu-Sing Chan, Hidehiko Shiraiwa, Chuan Lin, Lei Xue, Kenichi Ohtsuka, Angela Tai Hui
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Patent number: RE44720Abstract: A method of forming a MOSFET is provided. The method comprises forming a relatively thin layer of dielectric on a substrate. Depositing a gate material layer on the relatively thin layer of dielectric. Removing portions of the gate material layer to form a first and second gate material regions of predetermined lateral lengths. Introducing a first conductivity type dopant in the substrate to form a top gate using first edges of the first and second gate material regions as masks, Introducing a second conductivity dopant of high dopant density in the substrate to form a drain region adjacent the surface of the substrate using a second edge of the second gate material region as a mask to form a first edge of the drain region, wherein a spaced distance between the top gate and the drain region is determined by the lateral length of the second gate material region.Type: GrantFiled: August 21, 2012Date of Patent: January 21, 2014Assignee: Intersil Americas Inc.Inventor: James D. Beasom