Semiconductor Islands Formed Upon Insulating Substrate Or Layer (e.g., Mesa Formation, Etc.) Patents (Class 438/164)
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Patent number: 8241997Abstract: There is provided a method of removing trap levels and defects, which are caused by stress, from a single crystal silicon thin film formed by an SOI technique. First, a single crystal silicon film is formed by using a typical bonding SOI technique such as Smart-Cut or ELTRAN. Next, the single crystal silicon thin film is patterned to form an island-like silicon layer, and then, a thermal oxidation treatment is carried out in an oxidizing atmosphere containing a halogen element, so that an island-like silicon layer in which the trap levels and the defects are removed is obtained.Type: GrantFiled: July 10, 2008Date of Patent: August 14, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8236634Abstract: Thin semiconductor regions and thick semiconductor regions are formed oven an insulator layer. Thick semiconductor regions include at least one semiconductor fin. A gate conductor layer is patterned to form disposable planar gate electrodes over ETSOI regions and disposable side gate electrodes on sidewalls of semiconductor fins. End portions of the semiconductor fins are vertically recessed to provide thinned fin portions adjacent to an unthinned fin center portion. After appropriate masking by dielectric layers, selective epitaxy is performed on planar source and drain regions of ETSOI field effect transistors (FETs) to form raised source and drain regions. Further, fin source and drain regions are grown on the thinned fin portions. Source and drain regions, fins, and the disposable gate electrodes are planarized. The disposable gate electrodes are replaced with metal gate electrodes. FinFETs and ETSOI FETs are provided on the same semiconductor substrate.Type: GrantFiled: March 17, 2011Date of Patent: August 7, 2012Assignee: International Business Machines CorporationInventors: Narasimhulu Kanike, Kangguo Cheng, Ramachandra Divakaruni, Carl J. Radens
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Patent number: 8236633Abstract: The present invention provides a method for manufacturing a semiconductor device, by which a transistor including an active layer, a gate insulating film in contact with the active layer, and a gate electrode overlapping the active layer with the gate insulating film therebetween is provided; an impurity is added to a part of a first region overlapped with the gate electrode with the gate insulating film therebetween in the active layer and a second region but the first region in the active layer by adding the impurity to the active layer from one oblique direction; and the second region is situated in the one direction relative to the first region.Type: GrantFiled: March 31, 2008Date of Patent: August 7, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Keiichi Sekiguchi, Junichi Koezuka, Yasuyuki Arai, Shunpei Yamazaki
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Patent number: 8232150Abstract: A semiconductor structure is described. The structure includes a semiconductor substrate having a conductive gate abutting a gate insulator for controlling conduction of a channel region; and a source region and a drain region associated with the conductive gate, where the source region includes a first material and the drain region includes a second material, and where the conductive gate is self-aligned to the first material and the second material. In one embodiment, the first material includes Si and the second material includes SiGe. A method of forming a semiconductor structure is also described.Type: GrantFiled: January 9, 2009Date of Patent: July 31, 2012Assignee: International Business Machines CorporationInventors: Haining S. Yang, Kangguo Cheng, Robert Wong
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Patent number: 8227304Abstract: Disclosed is a method of forming a semiconductor-on-insulator (SOI) structure on a bulk semiconductor starting wafer. Parallel semiconductor bodies are formed at the top surface of the wafer. An insulator layer is deposited and recessed. Exposed upper portions of the semiconductor bodies are used as seed material for growing epitaxial layers of semiconductor material laterally over the insulator layer, thereby creating a semiconductor layer. This semiconductor layer can be used to form one or more SOI devices (e.g., a single-fin or multi-fin MUGFET or multiple series-connected single-fin or multi-fin MUGFETs). However, placement of SOI device components in and/or on portions of the semiconductor layer should be predetermined to avoid locations which might impact device performance (e.g., placement of any FET gate on a semiconductor fin formed from the semiconductor layer can be predetermined to avoid interfaces between joined epitaxial semiconductor material sections).Type: GrantFiled: February 23, 2010Date of Patent: July 24, 2012Assignee: International Business Machines CorporationInventors: Subramanian S. Iyer, Edward J. Nowak
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Patent number: 8216914Abstract: An object is to provide a method for manufacturing an SOI substrate including a semiconductor film with high planarity and high crystallinity. After a single crystal semiconductor film is formed over an insulating film by a separation step, a natural oxide film existing on a surface of the semiconductor film is removed and the semiconductor film is irradiated with first laser light and second laser light under an inert gas atmosphere or a reduced-pressure atmosphere. The number of shots of the first laser light that is emitted to an arbitrary point in the semiconductor film is greater than or equal to 7, preferably greater than or equal to 10 and less than or equal to 100. The number of shots of the second laser light that is emitted to an arbitrary point in the semiconductor film is greater than 0 and less than or equal to 2.Type: GrantFiled: August 31, 2010Date of Patent: July 10, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Masaki Koyama, Kosei Nei, Toru Hasegawa, Junpei Momo, Eiji Higa
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Patent number: 8211786Abstract: A semiconductor structure and a method for fabricating the semiconductor structure include a hybrid orientation substrate having a first active region having a first crystallographic orientation that is vertically separated from a second active region having a second crystallographic orientation different than the first crystallographic orientation. A first field effect device having a first gate electrode is located and formed within and upon the first active region and a second field effect device having a second gate electrode is located and formed within and upon the second active region. Upper surfaces of the first gate electrode and the second gate electrode are coplanar. The structure and method allow for avoidance of epitaxial defects generally encountered when using hybrid orientation technology substrates that include coplanar active regions.Type: GrantFiled: February 28, 2008Date of Patent: July 3, 2012Assignee: International Business Machines CorporationInventor: Kangguo Cheng
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Patent number: 8207027Abstract: A semiconductor structure and its method of fabrication include multiple finFETs with different vertical dimensions for the semiconductor fins. An implant species is implanted in a bottom portion of selected semiconductor fins on which reduced vertical dimension is desired. The bottom portion of the selected semiconductor fins with implant species is etched selective to the semiconductor material without the implanted species, i.e., the semiconductor material in the top portion of the semiconductor fin and other semiconductor fins without the implanted species. FinFETs with the full vertical dimension fins and a high on-current and finFETs with reduced vertical dimension fins with a low on-current thus results on the same semiconductor substrate. By adjusting the depth of the implant species, the vertical dimension of the semiconductor fins may be adjusted in selected finFETs.Type: GrantFiled: October 22, 2009Date of Patent: June 26, 2012Assignee: International Business Machines CorporationInventors: Huilong Zhu, Yue Tan
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Patent number: 8198148Abstract: Provided is a method for manufacturing a semiconductor device. The method includes: providing a first substrate where an active layer is formed on a buried insulation layer; forming a gate insulation layer on the active layer; forming a gate electrode on the gate insulation layer; forming a source/drain region on the active layer at both sides of the gate electrode; exposing the buried insulation layer around a thin film transistor (TFT) including the gate electrode and the source/drain region; forming an under cut at the bottom of the TFT by partially removing the buried insulation layer; and transferring the TFT on a second substrate.Type: GrantFiled: April 26, 2010Date of Patent: June 12, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Jae Bon Koo, Seung Youl Kang, In-Kyu You
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Patent number: 8198149Abstract: A method for fabricating an active device array substrate is provided. A first patterned semiconductor layer, a gate insulator, a first patterned conductive layer and a first dielectric layer is sequentially formed on a substrate. First contact holes exposing the first patterned semiconductor layer are formed in the first dielectric layer and the gate insulator. A second patterned conductive layer and a second patterned semiconductor layer disposed thereon are simultaneously formed on the first dielectric layer. The second conductive layer includes contact conductors and a bottom electrode. The second patterned semiconductor layer includes an active layer. A second dielectric layer having second contact holes is formed on the first dielectric layer, wherein a portion of the second contact holes exposes the active layer. A third patterned conductive layer electrically connected to the active layer through a portion of the second contact holes is formed on the second dielectric layer.Type: GrantFiled: January 13, 2012Date of Patent: June 12, 2012Assignee: Au Optronics CorporationInventors: Ming-Wei Sun, Chen-Yueh Li, Yu-Cheng Chen, Chia-Tien Peng
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Patent number: 8187928Abstract: A method of forming an integrated circuit includes forming a gate structure over a substrate. A plasma doping (PLAD) process is performed to at least a portion of the substrate that is adjacent to the gate structure. The doped portion of the substrate is annealed in an ambient with an oxygen-containing chemical.Type: GrantFiled: September 21, 2010Date of Patent: May 29, 2012Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: De-Wei Yu, Chun Hsiung Tsai, Yu-Lien Huang, Chien-Tai Chan, Wen-Sheh Huang
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Patent number: 8183135Abstract: A TFT (Thin Film Transistor) is provided in which a hydrogen feeding layer is able to be formed in a position where diffusing distance of hydrogen can be made short without causing an increase in photolithography processes. In the TFT, the hydrogen feeding layer to diffuse hydrogen into a dangling bond existing at an interface between a polycrystalline silicon thin film and a gate insulating film is formed in a position between the gate insulating film and a gate electrode. According to this configuration, diffusing distance of hydrogen at a period of time during hydrogenation can be made short and the hydrogenation process can be sufficiently performed without taking time in heat treatment.Type: GrantFiled: March 5, 2009Date of Patent: May 22, 2012Assignee: NEC CorporationInventor: Hiroaki Tanaka
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Patent number: 8178438Abstract: Silicide films with high quality are formed with treatment of laser light irradiation, so that miniaturization and higher performance is achieved in a field-effect transistor that is formed over an insulating substrate and has little variation in electric characteristics. An island-shaped semiconductor film including a pair of impurity regions and a channel formation region is formed over an insulating substrate, a first metal film is formed on the pair of impurity regions, and a second metal film that functions as a reflective film is formed over a gate electrode located over the channel formation region with a gate insulating film interposed therebetween. The first metal film is irradiated with laser light and a region where the second metal film is formed reflects the laser light, so that the island-shaped semiconductor film and the first metal film selectively react with each other in the pair of impurity regions.Type: GrantFiled: November 8, 2010Date of Patent: May 15, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Tomoaki Moriwaka
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Publication number: 20120115288Abstract: A method for fabricating an active device array substrate is provided. A first patterned semiconductor layer, a gate insulator, a first patterned conductive layer and a first dielectric layer is sequentially formed on a substrate. First contact holes exposing the first patterned semiconductor layer are formed in the first dielectric layer and the gate insulator. A second patterned conductive layer and a second patterned semiconductor layer disposed thereon are simultaneously formed on the first dielectric layer. The second conductive layer includes contact conductors and a bottom electrode. The second patterned semiconductor layer includes an active layer. A second dielectric layer having second contact holes is formed on the first dielectric layer, wherein a portion of the second contact holes exposes the active layer. A third patterned conductive layer electrically connected to the active layer through a portion of the second contact holes is formed on the second dielectric layer.Type: ApplicationFiled: January 13, 2012Publication date: May 10, 2012Applicant: AU OPTRONICS CORPORATIONInventors: Ming-Wei Sun, Chen-Yueh Li, Yu-Cheng Chen, Chia-Tien Peng
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Patent number: 8173478Abstract: A metal wiring suitable for a substrate of large size is provided. The present invention is characterized in that at least one layer of conductive film is formed on an insulating surface, a resist pattern is formed on the conductive film, and the conductive film having the resist pattern is etched to form a metal wiring while controlling its taper angle ? in accordance with the bias power density, the ICP power density, the temperature of lower electrode, the pressure, the total flow rate of etching gas, or the ratio of oxygen or chlorine in etching gas. The thus formed metal wiring has less fluctuation in width or length and can satisfactorily deal with an increase in size of substrate.Type: GrantFiled: January 22, 2009Date of Patent: May 8, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koji Ono, Hideomi Suzawa
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Patent number: 8169027Abstract: A multi-gate transistor and a method of forming a multi-gate transistor, the multi-gate transistor including a fin having an upper portion and a lower portion. The upper portion having a first band gap and the lower portion having a second band gap with the first band gap and the second band gap designed to inhibit current flow from the upper portion to the lower portion. The multi-gate transistor further including a gate structure having sidewalls electrically coupled with said upper portion and said lower portion and a substrate positioned below the fin.Type: GrantFiled: April 9, 2010Date of Patent: May 1, 2012Assignee: Intel CorporationInventors: Brian S. Doyle, Been-Yih Jin, Jack T. Kavalieros, Suman Datta
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Patent number: 8158471Abstract: A method of forming capacitorless DRAM over localized silicon-on-insulator comprises the following steps: A silicon substrate is provided, and an array of silicon studs is defined within the silicon substrate. An insulator layer is defined atop at least a portion of the silicon substrate, and between the silicon studs. A silicon-over-insulator layer is defined surrounding the silicon studs atop the insulator layer, and a capacitorless DRAM is formed within and above the silicon-over-insulator layer.Type: GrantFiled: October 5, 2010Date of Patent: April 17, 2012Assignee: Micron Technology, Inc.Inventors: Suraj Mathew, Jigish D Trivedi
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Patent number: 8158463Abstract: A process for manufacturing a MOS device includes forming a semiconductor layer having a first type of conductivity; forming an insulated gate structure having an electrode region (25), above the semiconductor layer (23); forming body regions having a second type of conductivity, within the semiconductor layer, laterally and partially underneath the insulated gate structure; forming source regions having the first type of conductivity, within the body regions; and forming a first enrichment region, in a surface portion of the semiconductor layer underneath the insulated gate structure. The first enrichment region has the first type of conductivity and is set at a distance from the body regions. In order to form the first enrichment region, a first enrichment window is defined within the insulated gate structure, and first dopant species of the first type of conductivity are introduced through the first enrichment window and in a way self-aligned thereto.Type: GrantFiled: April 19, 2006Date of Patent: April 17, 2012Assignee: STMicroelectronics S.r.l.Inventor: Giuseppe Curro′
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Patent number: 8159018Abstract: A finFET-based non-volatile memory device on a semiconductor substrate includes source and drain regions, a fin body, a charge trapping stack and a gate. The fin body extends between the source and the drain region as a connection. The charge trapping stack covers a portion of the fin body and the gate covers the charge trapping stack at the location of the fin body. The fin body has a corner-free shape for at least ¾ of the circumference of the fin body which lacks distinct crystal faces and transition zones in between the crystal faces.Type: GrantFiled: April 19, 2007Date of Patent: April 17, 2012Assignee: NXP B.V.Inventors: Nader Akil, Prabhat Agarwal, Robertus T. F. Van Schaijk
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Patent number: 8158466Abstract: An array substrate including a substrate having a pixel region, a gate line and a gate electrode on the substrate, the gate electrode being connected to the gate line, a gate insulating layer on the gate line and the gate electrode, an oxide semiconductor layer on the gate insulating layer, an auxiliary pattern on the oxide semiconductor layer, and source and drain electrodes on the auxiliary pattern, the source and drain electrodes being disposed over the auxiliary pattern and spaced apart from each other to expose a portion of the auxiliary pattern. Further, the exposed portion of the auxiliary pattern exposes a channel region and including a metal oxide over the channel region.Type: GrantFiled: December 4, 2009Date of Patent: April 17, 2012Assignee: LG Display Co., Ltd.Inventors: Yong-Yub Kim, Chang-Il Ryoo
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Patent number: 8154059Abstract: An object of the present invention is to prevent the deterioration of a TFT (thin film transistor). The deterioration of the TFT by a BT test is prevented by forming a silicon oxide nitride film between the semiconductor layer of the TFT and a substrate, wherein the silicon oxide nitride film ranges from 0.3 to 1.6 in a ratio of the concentration of N to the concentration of Si.Type: GrantFiled: October 22, 2010Date of Patent: April 10, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Masahiko Hayakawa, Mitsunori Sakama, Satoshi Toriumi
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Patent number: 8148243Abstract: The following discloses and describes a zero capacitor RAM as well as a method for manufacturing the same. The zero capacitor RAM includes an SOI substrate. This SOI substrate is composed of a stacked structure of a silicon substrate, an embedded insulation film and a silicon layer. This layer is patterned into line types to constitute active patterns. Moreover, a first insulation layer forms between the active patterns and gates form on the active patterns as well as the first insulation layer to extend perpendicularly to the active patterns. In addition, a source forms in the active pattern on one side of each gate, a drain forms in the active pattern on the other side of each gate which is achieved by filling a metal layer. Continuing, a contact plug forms between the gates on the source and an interlayer dielectric forms on the contact plug in addition to the gates Finally, a bit line forms on the interlayer dielectric to extend perpendicularly to the gates and come into contact with the drain.Type: GrantFiled: December 20, 2010Date of Patent: April 3, 2012Assignee: Hynix Semiconductor Inc.Inventor: Eun Sung Lee
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Patent number: 8148737Abstract: Disclosed are a light emitting device, a light emitting device package and a lighting system. The light emitting device of the embodiment includes a light emitting structure including a first conductive semiconductor layer, an active layer over the first conductive semiconductor layer, and a second conductive semiconductor layer over the active layer; a dielectric layer over a first region of the first conductive semiconductor layer; a second electrode over the dielectric layer; and a first electrode over a second region of the first conductive semiconductor layer.Type: GrantFiled: October 21, 2010Date of Patent: April 3, 2012Assignee: LG Innotek Co., Ltd.Inventor: Sung Min Hwang
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Patent number: 8148225Abstract: A fully-depleted (FD) Silicon-on-Insulator (SOI) MOSFET access transistor comprising a gate electrode of a conductivity type which is opposite the conductivity type of the source/drain regions and a method of fabrication are disclosed.Type: GrantFiled: March 10, 2009Date of Patent: April 3, 2012Assignee: Micron Technology, Inc.Inventors: Hongmei Wang, John K. Zahurak
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Patent number: 8143117Abstract: A method for fabricating an active device array substrate is provided. A first patterned semiconductor layer, a gate insulator, a first patterned conductive layer and a first dielectric layer is sequentially formed on a substrate. First contact holes exposing the first patterned semiconductor layer are formed in the first dielectric layer and the gate insulator. A second patterned conductive layer and a second patterned semiconductor layer disposed thereon are simultaneously formed on the first dielectric layer. The second conductive layer includes contact conductors and a bottom electrode. The second patterned semiconductor layer includes an active layer. A second dielectric layer having second contact holes is formed on the first dielectric layer, wherein a portion of the second contact holes exposes the active layer. A third patterned conductive layer electrically connected to the active layer through a portion of the second contact holes is formed on the second dielectric layer.Type: GrantFiled: August 12, 2009Date of Patent: March 27, 2012Assignee: Au Optronics CorporationInventors: Ming-Wei Sun, Chen-Yueh Li, Yu-Cheng Chen, Chia-Tien Peng
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Patent number: 8143118Abstract: A semiconductor device having a highly responsive thin film transistor (TFT) with low subthreshold swing and suppressed decrease in the on-state current and a manufacturing method thereof are demonstrated. The TFT of the present invention is characterized by its semiconductor layer where the thickness of the source region or the drain region is larger than that of the channel formation region. Manufacture of the TFT is readily achieved by the formation of an amorphous semiconductor layer on a projection portion and a depression portion, which is followed by subjecting the melting process of the semiconductor layer, resulting in the formation of a crystalline semiconductor layer having different thicknesses. Selective addition of impurity to the thick portion of the semiconductor layer provides a semiconductor layer in which the channel formation region is thinner than the source or drain region.Type: GrantFiled: March 7, 2008Date of Patent: March 27, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hideto Ohnuma, Atsuo Isobe, Hiromichi Godo
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Patent number: 8138031Abstract: A method of manufacturing a semiconductor device includes forming a plurality of Fins including a semiconductor material on an insulation layer; forming gate insulation films on sidewalls of the Fins; forming a gate electrode which extends in a direction of arrangement of the Fins and which is electrically insulated from the Fins, the gate electrode is common in the Fins on the gate insulation film; implanting an impurity into portions of the Fins by using the gate electrode as a mask to form a source-drain diffusion layer, the portions of the Fins extending on both sides of the gate electrodes; and depositing a conductive material on both sides of the Fins to connect the Fins to each other.Type: GrantFiled: September 17, 2009Date of Patent: March 20, 2012Assignee: Kabushiki Kaisha ToshibaInventor: Atsushi Yagishita
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Patent number: 8133774Abstract: At least one conductive via structure is formed from an interconnect-level metal line through a middle-of-line (MOL) dielectric layer, a shallow trench isolation structure in a top semiconductor layer, and a buried insulator layer to a bottom semiconductor layer. The shallow trench isolation structure laterally abuts at least two field effect transistors that function as a radio frequency (RF) switch. The at least one conductive via structure and the at interconnect-level metal line may provide a low resistance electrical path from the induced charge layer in a bottom semiconductor layer to electrical ground, discharging the electrical charge in the induced charge layer. The discharge of the charge in the induced charge layer thus reduces capacitive coupling between the semiconductor devices and the bottom semiconductor layer, and thus secondary coupling between components electrically disconnected by the RF switch is reduced.Type: GrantFiled: March 26, 2009Date of Patent: March 13, 2012Assignee: International Business Machines CorporationInventors: Alan B. Botula, Alvin J. Joseph, Edward J. Nowak, Yun Shi, James A. Slinkman
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Publication number: 20120056264Abstract: A method and semiconductor structure includes an insulator layer on a substrate, a plurality of parallel fins above the insulator layer, relative to a bottom of the structure. Each of the fins comprises a central semiconductor portion and conductive end portions. At least one conductive strap may be positioned within the insulator layer below the fins, relative to the bottom of the structure. The conductive strap can be perpendicular to the fins and contact the fins. The conductive strap further includes recessed portions disposed within the insulator layer, below the plurality of fins, relative to the bottom of the structure, and between each of the plurality of fins, and projected portions disposed above the insulator layer, collinear with each of the plurality of fins, relative to the bottom of the structure. The conductive strap is disposed in at least one of a source and a drain region of the semiconductor structure.Type: ApplicationFiled: September 7, 2010Publication date: March 8, 2012Applicant: International Business Machines CorporationInventors: Brent A. Anderson, Andres Bryant, Edward J. Nowak, Jed H. Rankin
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Patent number: 8129232Abstract: A semiconductor device having a CMOS structure, wherein, in manufacturing a CMOS circuit, an impurity element which imparts p-type conductivity to the active layer of the p-channel type semiconductor device is added before forming the gate insulating film. Then, by applying thermal oxidation treatment to the active layer, the impurity element is subjected to redistribution, and the concentration of the impurity element in the principal surface of the active layer is minimized. The precise control of threshold voltage is enabled by the impurity element that is present in a trace quantity.Type: GrantFiled: December 21, 2009Date of Patent: March 6, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Hisashi Ohtani, Takeshi Fukunaga
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Publication number: 20120049284Abstract: In one exemplary embodiment, a semiconductor structure includes: a semiconductor-on-insulator substrate with a top semiconductor layer overlying an insulation layer and the insulation layer overlies a bottom substrate layer; at least one first device at least partially overlying and disposed upon a first portion of the top semiconductor layer, where the first portion has a first thickness, a first width and a first depth; and at least one second device at least partially overlying and disposed upon a second portion of the top semiconductor layer, where the second portion has a second thickness, a second width and a second depth, where at least one of the following holds: the first thickness is greater than the second thickness, the first width is greater than the second width and the first depth is greater than the second depth.Type: ApplicationFiled: August 24, 2010Publication date: March 1, 2012Applicant: International Business Machines CorporationInventors: Bruce B. Doris, Kangguo Cheng, Ali Khakifirooz, Pranita Kulkarni, Ghavam G. Shahidi
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Patent number: 8114721Abstract: A method of forming a FinFET device is provided. In one embodiment, a fin is formed on a substrate. A gate structure is formed over the fin, the gate structure having a dielectric layer and a conformal first polysilicon layer formed above the dielectric layer. An etch stop layer is formed above the first polysilicon layer and thereafter a second polysilicon layer is formed above the etch stop layer. The second polysilicon layer and the etch stop layer are removed. A metal layer is formed above the first polysilicon layer. The first polysilicon layer is reacted with the metal layer to silicide the first polysilicon layer. Any un-reacted metal layer is thereafter removed and source and drain regions are formed on opposite sides of the fin.Type: GrantFiled: December 15, 2009Date of Patent: February 14, 2012Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Shun Wu Lin, Peng-Soon Lim, Matt Yeh, Ouyang Hui
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Patent number: 8114723Abstract: A structure, memory devices using the structure, and methods of fabricating the structure. The structure includes: an array of nano-fins, each nano-fin comprising an elongated block of semiconductor material extending axially along a first direction, the nano-fins arranged in groups of at least two nano-fins each, wherein ends of nano-fins of each adjacent group of nano-fins are staggered with respect to each other on both a first and a second side of the array; wherein nano-fins of each group of nano-fins are electrically connected to a common contact that is specific to each group of nano-fins such that the common contacts comprise a first common contact on the first side of the array and a second common contact on the second side of the array; and wherein each group of nano-fins has at least two gates that electrically control the conductance of nano-fins of the each group of nano-fins.Type: GrantFiled: June 7, 2010Date of Patent: February 14, 2012Assignee: International Business Machines CorporationInventors: Kailash Gopalakrishnan, Rohit Sudhir Shenoy
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Publication number: 20120032732Abstract: A method for making an integrated circuit includes at least a tri-gate FinFET and a dual-gate FinFET. The method includes providing a semiconductor on insulator (SOI) substrate. The method also includes implanting impurities into the substrate for adjusting a threshold voltage. The method provides a nitride film overlying a surface region of the substrate and selectively etches the silicon nitride film to form a nitride cap region. The method etches the silicon layer to form a first and a second silicon fin regions. The nitride cap region is maintained on a portion of a surface region of the first silicon fin region. The method includes forming a gate dielectric, depositing a polysilicon film, and planarizing the polysilicon film by chemical mechanical polishing (CMP) using the nitride cap region as a polish stop. The method etches the polysilicon film to form gate electrodes. The method forms elevated source and drain regions.Type: ApplicationFiled: January 6, 2011Publication date: February 9, 2012Applicant: Semiconductor Manufacturing International (Shanghai) CorporationInventors: DeYuan Xiao, Guo Qing Chen, Roger Lee
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Publication number: 20120034744Abstract: A highly responsive semiconductor device in which the subthreshold swing (S value) is small and reduction in on-current is suppressed is manufactured. A semiconductor layer in which a thickness of a source region or a drain region is larger than that of a channel formation region is formed. A semiconductor layer having a concavo-convex shape which is included in the semiconductor device is formed by the steps of forming a first semiconductor layer over a substrate; forming a first insulating layer and a conductive layer over the first semiconductor layer; forming a second insulating layer over a side surface of the conductive layer; forming a second semiconductor layer over the first insulating layer, the conductive layer and the second insulating layer; etching the second semiconductor layer using a resist formed partially as a mask; and performing heat treatment to the first semiconductor layer and the second semiconductor layer.Type: ApplicationFiled: October 20, 2011Publication date: February 9, 2012Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Hideto Ohnuma
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Patent number: 8110455Abstract: A method of manufacturing a semiconductor device (1200), the method comprising forming a sacrificial pattern having a recess on a substrate (402), filling the recess and covering the substrate and the sacrificial pattern with a semiconductor structure, forming an annular trench in the semiconductor structure to expose a portion of the sacrificial pattern and to separate material (904) of the semiconductor structure enclosed by the annular trench from material (906) of the semiconductor structure surrounding the annular trench, removing the exposed sacrificial pattern to expose material of the semiconductor structure filling the recess, and converting the exposed material of the semiconductor structure filling the recess into electrically insulting material (1202).Type: GrantFiled: January 26, 2009Date of Patent: February 7, 2012Assignee: NXP B.V.Inventor: Pierre Goarin
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Patent number: 8106383Abstract: A graphene field effect transistor includes a gate stack, the gate stack including a seed layer, a gate oxide formed over the seed layer, and a gate metal formed over the gate oxide; an insulating layer; and a graphene sheet displaced between the seed layer and the insulating layer.Type: GrantFiled: November 13, 2009Date of Patent: January 31, 2012Assignee: International Business Machines CorporationInventors: Keith A. Jenkins, Yu-Ming Lin, Alberto Valdes-Garcia
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Patent number: 8101473Abstract: A process is provided for fabricating rounded three-dimensional germanium active channels for transistors and sensors. For forming sensors, the process comprises providing a crystalline silicon substrate; depositing an oxide mask on the crystalline silicon substrate; patterning the oxide mask with trenches to expose linear regions of the silicon substrate; epitaxially grow germanium selectively in the trenches, seeded from the silicon wafer; optionally etching the SiO2 mask partially, so that the cross section resembles a trapezoid on a stem; and annealing at an elevated temperature. The annealing process forms the rounded channel. For forming transistors, the process further comprises depositing and patterning a gate oxide and gate electrode onto this structure to form the gate stack of a MOSFET device; and after patterning the gate, implanting dopants into the source and drain located on the parts of the germanium cylinder on either side of the gate line.Type: GrantFiled: July 10, 2009Date of Patent: January 24, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Hans Cho, Theodore I Kamins, Nathaniel Quitoriano
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Patent number: 8101945Abstract: A disclosed laminated structure includes a wettability variable layer containing a wettability variable material whose surface energy changes when energy is applied thereto and including at least a high surface energy area having high surface energy and a low surface energy area having low surface energy; and a conductive layer disposed on the high surface energy area. The conductive layer includes a first high surface energy area, a second high surface energy area smaller in width than the first high surface energy area, and a third high surface energy area smaller in width than the second high surface energy area. The first high surface energy area and the second high surface energy area are connected by the third high surface energy area.Type: GrantFiled: September 17, 2008Date of Patent: January 24, 2012Assignee: Ricoh Company, Ltd.Inventors: Atsushi Onodera, Hidenori Tomono
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Patent number: 8101512Abstract: In a mesa isolation configuration for forming a transistor on a semiconductor island, an additional planarization step is performed to enhance the uniformity of the gate patterning process. In some illustrative embodiments, the gate electrode material may be planarized, for instance, on the basis of CMP, to compensate for the highly non-uniform surface topography, when the gate electrode material is formed above the non-filled isolation trenches. Consequently, significant advantages of the mesa isolation strategy may be combined with a high degree of scalability due to the enhancement of the critical gate patterning process.Type: GrantFiled: July 5, 2007Date of Patent: January 24, 2012Assignee: GLOBALFOUNDRIES Inc.Inventors: Martin Gerhardt, Martin Trentzsch, Markus Forsberg, Manfred Horstmann
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Patent number: 8101472Abstract: A method for manufacturing a TFT substrate in which a channel length can be stably formed while the number of masks is reduced. The method includes processing a gate of the n-type TFT, a gate of the p-type TFT, and an upper capacitor electrode by using a half-tone mask instead of some of normal masks to reduce the number of masks, and changing impurity concentrations of semiconductor films located in regions which become a channel of the n-type TFT, a source and a drain of the n-type TFT, a channel of the p-type TFT, a source and a drain of the p-type TFT, and an lower capacitor electrode, by using a pattern of the half-tone mask and a normal mask.Type: GrantFiled: October 15, 2008Date of Patent: January 24, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takeshi Sato, Yoshiaki Toyota
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Patent number: 8089126Abstract: Methods and structures for improving substrate loss and linearity in SOI substrates. The methods include forming damaged crystal structure regions under the buried oxide layer of SOI substrates and the structures included damaged crystal structure regions under the buried oxide layer of the SOI substrate.Type: GrantFiled: July 22, 2009Date of Patent: January 3, 2012Assignee: International Business Machines CorporationInventors: Alan Bernard Botula, David S. Collins, Alvin Jose Joseph, Howard Smith Landis, James Albert Slinkman, Anthony K. Stamper
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Publication number: 20110316061Abstract: Semiconductor structures and methods to control bottom corner threshold in a silicon-on-insulator (SOI) device. A method includes doping a corner region of a semiconductor-on-insulator (SOI) island. The doping includes tailoring a localized doping of the corner region to reduce capacitive coupling of the SOI island with an adjacent structure.Type: ApplicationFiled: June 24, 2010Publication date: December 29, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Joseph ERVIN, Jeffrey B. JOHNSON, Kevin MCSTAY, Paul C. PARRIES, Chengwen PEI, Geng WANG, Yanli ZHANG
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Patent number: 8084305Abstract: A semiconductor device comprises a semiconductor mesa overlying a dielectric layer, a gate stack formed overlying the semiconductor mesa, and an isolation spacer formed surrounding the semiconductor mesa and filling any undercut region at edges of the semiconductor mesa.Type: GrantFiled: February 25, 2008Date of Patent: December 27, 2011Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Chih-Hsin Ko, Wen-Chin Lee, Yee-Chia Yeo, Chung-Hu Ke
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Patent number: 8084310Abstract: Embodiments of the present invention pertain to methods of forming patterned features on a substrate having a reduced pitch in two dimensions as compared to what is possible using standard photolithography processing techniques using a single high-resolution photomask. A spacer layer is formed over a two-dimensional square grid of cores with a thickness chosen to leave a dimple at the center of four cores on the corners of a square. The spacer layer is etched back to reveal the substrate at the centers of the square. Removing the core material results in double the pattern density of the lithographically defined grid of cores. The regions of exposed substrate may be filled again with core material and the process repeated to quadruple the pattern density.Type: GrantFiled: October 21, 2009Date of Patent: December 27, 2011Assignee: Applied Materials, Inc.Inventors: Bencherki Mebarki, Li Yan Miao, Christopher Dennis Bencher, Jen Shu
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Patent number: 8080485Abstract: A method of forming a semiconductor structure comprises providing a substrate and forming an insulator layer on the substrate. A first film is formed on the insulator layer. Thus, the first film can correspond to a device region of the semiconductor structure. A second film, comprising a second material that is different from the first material, is also formed on the insulator layer adjacent to the first film. The second material can comprise an isolation material (e.g., an oxide and/or nitride material) and can, for example comprise the same dielectric material as the insulator layer (e.g., silicon dioxide). The second film can correspond to an isolation region (e.g., a shallow trench isolation region) of the semiconductor structure. The second film is specifically formed with a first section having a first thickness and a second section having a second thickness that is different from the first thickness.Type: GrantFiled: March 8, 2010Date of Patent: December 20, 2011Assignee: International Business Machines CorporationInventors: Brent A. Anderson, Edward J. Nowak
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Patent number: 8071447Abstract: A semiconductor device manufacturing method includes removing an insulating film on a semiconductor substrate by etching and subsequently oxidizing a surface of the substrate by using a liquid oxidation agent without exposing this surface to an atmosphere, thereby forming a first insulating film containing an oxide of a constituent element of the substrate on the surface of the substrate; forming a second insulating film containing an aluminum oxide on the first insulating film; forming a third insulating film containing a rare earth oxide on the second insulating film; forming a high-k insulating film on the third insulating film; introducing nitrogen into the high-k insulating film to thereby make it a fourth insulating film; and conducting heat treatment to change the first through third insulating films into an insulating film made of a mixture containing aluminum, a rare earth element, the constituent element of the substrate, and oxygen.Type: GrantFiled: February 11, 2010Date of Patent: December 6, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Seiji Inumiya, Tomonori Aoyama
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Patent number: 8062939Abstract: A semiconductor storage element includes: a semiconductor layer constituted of a line pattern with a predetermined width formed on a substrate; a quantum dot forming an electric charge storage layer formed on the semiconductor layer through a first insulating film serving as a tunnel insulating film; an impurity diffusion layer formed in a surface layer of the semiconductor layer so as to sandwich the quantum dot therebetween; and a control electrode formed on the quantum dot through a second insulating film.Type: GrantFiled: February 18, 2011Date of Patent: November 22, 2011Assignee: Kabushiki Kaisha ToshibaInventor: Kenji Kawabata
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Publication number: 20110272762Abstract: A node dielectric and a conductive trench fill region filling a deep trench are recessed to a depth that is substantially coplanar with a top surface of a semiconductor-on-insulator (SOI) layer. A shallow trench isolation portion is formed on one side of an upper portion of the deep trench, while the other side of the upper portion of the deep trench provides an exposed surface of a semiconductor material of the conductive fill region. A selective epitaxy process is performed to deposit a raised source region and a raised strap region. The raised source region is formed directly on a planar source region within the SOI layer, and the raised strap region is formed directly on the conductive fill region. The raised strap region contacts the raised source region to provide an electrically conductive path between the planar source region and the conductive fill region.Type: ApplicationFiled: May 10, 2010Publication date: November 10, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Roger A. Booth, JR., Kangguo Cheng, Joseph Ervin, Ali Khakifirooz, Chengwen Pei, Ravi M. Todi, Geng Wang
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Publication number: 20110272696Abstract: A thin film transistor panel includes a substrate, a light blocking layer on the substrate, a first protective film on the light blocking layer, a first electrode and a second electrode on the first protective film, an oxide semiconductor layer on a portion of the first protective film exposed between the first electrode and the second electrode, an insulating layer, a third electrode overlapping with the oxide semiconductor layer and on the insulating layer, and a fourth electrode on the insulating layer. The light blocking layer includes first sidewalls, and the first protective film includes second sidewalls. The first and the second sidewalls are disposed along substantially the same line.Type: ApplicationFiled: April 22, 2011Publication date: November 10, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hye-Young RYU, Jin-Won LEE, Woo-Geun LEE, Hee-Jun BYEON, Xun ZHU