Lateral Single Gate Single Channel Transistor With Inverted Structure, I.e., Channel Layer Is Formed After Gate (epo) Patents (Class 257/E21.414)
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Patent number: 9627421Abstract: An array substrate and manufacturing method thereof and a display device. The display device includes a pixel electrode (8), including a first portion (b) in a non-display region and a second portion (a) in a display region; a first electrode (6) formed on the first portion (b) of the pixel electrode (8); a passivation layer (9) formed on the pixel electrode (8) and the first electrode (6), the passivation layer (9) includes a via hole (11) located over the first electrode (6); an active layer (4) and a second electrode (7) that are formed on the passivation layer (9), the active layer (4) being connected to the first electrode (6) through the via hole (11) of the passivation layer (9). With the array substrate and the manufacturing method thereof, the manufacturing cost is reduced, materials of the electrodes are less subjected to corrosion, and quality of the array substrate is enhanced.Type: GrantFiled: October 1, 2014Date of Patent: April 18, 2017Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Shuang Sun, Seungjin Choi, Jing Niu, Fangzhen Zhang
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Patent number: 9553170Abstract: A manufacturing method of a thin film transistor and a thin film transistor are provided. In the manufacturing method, formation of pattern of a source electrode (7), a drain electrode (8) and an active layer (6) comprises: forming a semiconductor layer (10) and a conductive layer (11) that cover the whole substrate on the substrate in sequence; forming a first photoresist layer (4) at a region where the source electrode is to be formed and at a region where the drain electrode is to be formed on the conductive layer (11), respectively; forming a second photoresist layer (5) at least at a gap between the source electrode and the drain electrode that are to be formed on the conductive layer (11); conducting an etching process on the substrate with the first photoresist layer (4), the second photoresist layer (5), the semiconductor layer (10) and the conductive layer (11) formed thereon, so as to form pattern of the active layer (6), the source electrode (7) and the drain electrode (8).Type: GrantFiled: June 26, 2014Date of Patent: January 24, 2017Assignees: BOE Technology Group Co., Ltd., Beijing BOE Optoelectronics Technology Co., Ltd.Inventors: Xuecheng Hou, Tao Wu, Jian Guo
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Patent number: 9525035Abstract: A vertical, high-voltage MOS transistor, which has a source region, a body contact region, and a number of trenches structures with field plates, and a method of forming the MOS transistor increase the on-state resistance of the MOS transistor by reducing the trench pitch. Trench pitch can be reduced with metal contacts that simultaneously touch the source regions, the body contact regions, and the field plates. Trench pitch can also be reduced with a gate that increases the size of the LDD region.Type: GrantFiled: December 8, 2014Date of Patent: December 20, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Christopher Boguslaw Kocon, Simon John Molloy, John Manning Savidge Neilson, Hideaki Kawahara
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Patent number: 9508592Abstract: To improve the reliability of a semiconductor device including a low-resistance material such as copper, aluminum, gold, or silver as a wiring. Provided is a semiconductor device including a pair of electrodes electrically connected to a semiconductor layer which has a stacked-layer structure including a first protective layer in contact with the semiconductor layer and a conductive layer containing the low-resistance material and being over and in contact with the first protective layer. The top surface of the conductive layer is covered with a second protective layer functioning as a mask for processing the conductive layer. The side surface of the conductive layer is covered with a third protective layer. With this structure, entry or diffusion of the constituent element of the pair of conductive layers containing the low-resistance material into the semiconductor layer is suppressed.Type: GrantFiled: October 26, 2015Date of Patent: November 29, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Junichi Koezuka, Masami Jintyou, Yukinori Shima, Takahiro Iguchi
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Patent number: 9502536Abstract: Provided is a manufacturing method of a thin film transistor array panel including: formation of a gate line including a gate electrode on a substrate; formation of sequentially a gate insulating layer, an active layer, a data metal layer, and a photoresist etching mask pattern on the gate line; etching the data metal layer with the same shape as the photoresist etching mask pattern; etching the active layer by using the photoresist etching mask pattern; formation of a data line including a source electrode and a drain electrode for completing a channel region on the active layer; and formation of a pixel electrode exposing the drain electrode and electrically connected with the drain electrode, in which in the etching of the active layer, a dry-etch process is performed by using gas including at least one of NF3 and H2.Type: GrantFiled: July 9, 2015Date of Patent: November 22, 2016Assignee: Samsund Display Co., Ltd.Inventors: Dong Il Kim, Joo Hyung Lee, Jae Woo Jeong
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Patent number: 9450077Abstract: A method of manufacturing a thin film transistor substrate is provided, including a first photoresist pattern covers a channel during a process of etching a second photoresist pattern and protects the channel. Thus, an etching stop layer is not required.Type: GrantFiled: December 30, 2014Date of Patent: September 20, 2016Assignee: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Kuo-Lung Fang, Yi-Chun Kao, Po-Li Shih, Chih-Lung Lee, Hsin-Hua Lin
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Patent number: 9450211Abstract: A method of manufacturing an organic light-emitting display device is provided. The method includes forming a pixel electrode, forming a hydrophobic material layer on the pixel electrode, wherein the hydrophobic material layer includes a hydrophobic material, forming a pixel-defining layer by patterning the hydrophobic material layer, so as to expose at least a portion of the pixel electrode, and removing the hydrophobic material on the exposed portion of the pixel electrode using surface treatment.Type: GrantFiled: October 9, 2013Date of Patent: September 20, 2016Assignee: Samsung Display Co., Ltd.Inventors: Ki-Wan Ahn, Jae-Hyuck Jang
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Patent number: 9412623Abstract: A method including providing a substrate with a gate, a layer of gate insulator material adjacent the gate, and a layer of metal oxide semiconductor material positioned on the gate insulator opposite the gate, forming a selectively patterned etch stop passivation layer and heating at elevated temperature in an oxygen-containing or nitrogen-containing or inert ambience to selectively increase the carrier concentration in regions of the metal oxide semiconductor not covered by the etch stop layer, on which overlying and spaced apart source/drain metals are formed. Subsequently heating the transistor in an oxygen-containing or nitrogen-containing or inert ambience to further improve the source/drain contacts and adjust the threshold voltage to a desired level. Providing additional passivation layer(s) on top of the transistor with electric insulation and barrier property to moisture and chemicals in the surrounding environment.Type: GrantFiled: August 24, 2015Date of Patent: August 9, 2016Assignee: CBRITE INC.Inventors: Gang Yu, Chan-Long Shieh, Tian Xiao, Fatt Foong
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Patent number: 9389477Abstract: A semiconductor device includes TFTs designed in accordance with characteristics of circuits. In a first structure of the invention, the TFT is formed by using a crystalline silicon film made of a unique crystal structure body. The crystal structure body has a structure in which rod-like or flattened rod-like crystals grow in a direction parallel to each other. In a second structure of the invention, growth distances of lateral growth regions are made different from each other in accordance with channel lengths, of the TFTs. By this, characteristics of TFTs formed in one lateral growth region can be made as uniform as possible.Type: GrantFiled: May 12, 2014Date of Patent: July 12, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Hisashi Ohtani
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Patent number: 9373525Abstract: An object is to establish a processing technique in manufacture of a semiconductor device in which an oxide semiconductor is used. A gate electrode is formed over a substrate, a gate insulating layer is formed over the gate electrode, an oxide semiconductor layer is formed over the gate insulating layer, the oxide semiconductor layer is processed by wet etching to form an island-shaped oxide semiconductor layer, a conductive layer is formed to cover the island-shaped oxide semiconductor layer, the conductive layer is processed by dry etching to form a source electrode, and a drain electrode and part of the island-shaped oxide semiconductor layer is removed by dry etching to form a recessed portion in the island-shaped oxide semiconductor layer.Type: GrantFiled: November 20, 2014Date of Patent: June 21, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hideomi Suzawa, Shinya Sasagawa, Taiga Muraoka
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Patent number: 9245978Abstract: Disclosed are a self-aligned thin film transistor controlling a diffusion length of a doping material using a doping barrier in a thin film transistor having a self-aligned structure and a method of manufacturing the same. The self-aligned thin film transistor with a doping barrier includes: an active layer formed on a substrate and having a first doping region, a second doping region, and a channel region; a gate insulating film formed on the channel region; a gate electrode formed on the gate insulating film; a doping source film formed on the first doping region and the second doping region; and a doping barrier formed between the doping source film and the first doping region and between the doping source film and the second doping region.Type: GrantFiled: August 6, 2013Date of Patent: January 26, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chi Sun Hwang, Sang Hee Park, Him Chan Oh
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Patent number: 9018109Abstract: A thin film transistor in which deterioration at initial operation is not likely to be caused and a manufacturing method thereof. A transistor which includes a gate insulating layer at least whose uppermost surface is a silicon nitride layer, a semiconductor layer over the gate insulating layer, and a buffer layer over the semiconductor layer and in which the concentration of nitrogen in the vicinity of an interface between the semiconductor layer and the gate insulating layer, which is in the semiconductor layer is lower than that of the buffer layer and other parts of the semiconductor layer. Such a thin film transistor can be manufactured by exposing the gate insulating layer to an air atmosphere and performing plasma treatment on the gate insulating layer before the semiconductor layer is formed.Type: GrantFiled: March 2, 2010Date of Patent: April 28, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hidekazu Miyairi, Erika Kato, Kunihiko Suzuki
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Patent number: 9012275Abstract: A method of forming TFT is provided. The TFT includes a gate electrode, a gate insulating layer, a first protective pattern, a second protective pattern, a source electrode, a drain electrode, a semiconductor channel layer, and a passivation layer. The first protective pattern and the second protective pattern are disposed on the gate insulating layer above the gate electrode. The source electrode is disposed on the gate insulating layer and the first protective pattern. The drain electrode is disposed on the gate insulating layer and the second protective pattern. The semiconductor channel layer is disposed on the gate insulating layer, the source electrode, and the drain electrode. In an extending direction from the source electrode to the drain electrode, a length of the first protective pattern is shorter than that of the source electrode, and a length of the second protective pattern is shorter than that of the drain electrode.Type: GrantFiled: December 2, 2013Date of Patent: April 21, 2015Assignee: AU Optronics Corp.Inventors: Chung-Tao Chen, Wu-Hsiung Lin, Po-Hsueh Chen
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Patent number: 8993386Abstract: An object is to provide a semiconductor device including a semiconductor element which has favorable characteristics. A manufacturing method of the present invention includes the steps of: forming a first conductive layer which functions as a gate electrode over a substrate; forming a first insulating layer to cover the first conductive layer; forming a semiconductor layer over the first insulating layer so that part of the semiconductor layer overlaps with the first conductive layer; forming a second conductive layer to be electrically connected to the semiconductor layer; forming a second insulating layer to cover the semiconductor layer and the second conductive layer; forming a third conductive layer to be electrically connected to the second conductive layer; performing first heat treatment after forming the semiconductor layer and before forming the second insulating layer; and performing second heat treatment after forming the second insulating layer.Type: GrantFiled: March 9, 2010Date of Patent: March 31, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiroki Ohara, Toshinari Sasaki
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Patent number: 8969163Abstract: A method of forming a semiconductor structure may include preparing a continuous active layer in a region of the substrate and forming a plurality of adjacent gates on the continuous active layer. A first raised epitaxial layer may be deposited on a recessed region of the continuous active layer between a first and a second one of the plurality of gates, whereby the first and second gates are adjacent. A second raised epitaxial layer may be deposited on another recessed region of the continuous active layer between the second and a third one of the plurality of gates, whereby the second and third gates are adjacent. Using a cut mask, a trench structure is etched into the second gate structure and a region underneath the second gate in the continuous active layer. The trench is filled with isolation material for electrically isolating the first and second raised epitaxial layers.Type: GrantFiled: July 24, 2012Date of Patent: March 3, 2015Assignee: International Business Machines CorporationInventors: Michael V. Aquilino, Byeong Yeol Kim, Ying Li, Carl John Radens
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Patent number: 8962377Abstract: A method of fabricating a pixelated imager includes providing a substrate with bottom contact layer and sensing element blanket layers on the contact layer. The blanket layers are separated into an array of sensing elements by trenches isolating adjacent sensing elements. A sensing element electrode is formed adjacent each sensing element overlying a trench and defining a TFT. A layer of metal oxide semiconductor (MOS) material is formed on a dielectric layer overlying the electrodes and on an exposed upper surface of the blanket layers defining the sensing element adjacent each TFT. A layer of metal is deposited on each TFT and separated into source/drain electrodes on opposite sides of the sensing element electrode. The metal forming one of the S/D electrodes contacts the MOS material overlying the exposed surface of the semiconductor layer, whereby each sensing element in the array is electrically connected to the adjacent TFT by the MOS material.Type: GrantFiled: December 13, 2012Date of Patent: February 24, 2015Assignee: Cbrite Inc.Inventors: Chan-Long Shieh, Gang Yu
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Patent number: 8946703Abstract: To provide a method by which a semiconductor device including a thin film transistor with excellent electric characteristics and high reliability is manufactured with a small number of steps. After a channel protective layer is formed over an oxide semiconductor film containing In, Ga, and Zn, a film having n-type conductivity and a conductive film are formed, and a resist mask is formed over the conductive film. The conductive film, the film having n-type conductivity, and the oxide semiconductor film containing In, Ga, and Zn are etched using the channel protective layer and gate insulating films as etching stoppers with the resist mask, so that source and drain electrode layers, a buffer layer, and a semiconductor layer are formed.Type: GrantFiled: April 24, 2014Date of Patent: February 3, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hidekazu Miyairi, Kengo Akimoto, Yasuo Nakamura
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Patent number: 8946011Abstract: A manufacturing method of a semiconductor device having a stacked structure in which a lower layer is exposed is provided without increasing the number of masks. A source electrode layer and a drain electrode layer are formed by forming a conductive film to have a two-layer structure, forming an etching mask thereover, etching the conductive film using the etching mask, and performing side-etching on an upper layer of the conductive film in a state where the etching mask is left so that part of a lower layer is exposed. The thus formed source and drain electrode layers and a pixel electrode layer are connected in a portion of the exposed lower layer. In the conductive film, the lower layer and the upper layer may be a Ti layer and an Al layer, respectively. The plurality of openings may be provided in the etching mask.Type: GrantFiled: September 1, 2011Date of Patent: February 3, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hidekazu Miyairi, Takafumi Mizoguchi
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Patent number: 8932916Abstract: A method for fabricating a thin-film transistor is disclosed. Firstly, a patterned dielectric mask structure with a bottom thereof having a gate dielectric layer is formed on a gate-stacked structure so that the gate dielectric layer covers a gate of the gate-stacked structure. Top surface of the patterned dielectric mask structure has at least two openings. A semiconductor layer is formed on the gate-stacked structure via the openings by a sputtering method. The semiconductor layer comprises a channel above the gate, a source and a drain below the openings. The channel has a thickness which sequentially decreases from edge to center.Type: GrantFiled: November 8, 2013Date of Patent: January 13, 2015Assignee: National Chiao Tung UniversityInventors: Horng-Chih Lin, Rong-Jhe Lyu
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Patent number: 8927983Abstract: Disclosed herein is a thin film transistor array substrate. The thin film transistor array substrate includes a display area and a non-display area. The non-display area includes a signal line, a connecting line and a metal contact. The connecting line is formed in a first patterned metal layer. The signal line and the metal contact are formed in a second patterned metal layer. The connecting line is connected to the signal line by a first through-hole, and the connecting line is connected to the metal contact by a second through-hole. Furthermore, a method of fabricating the thin film transistor array substrate is also disclosed.Type: GrantFiled: August 19, 2012Date of Patent: January 6, 2015Assignee: E Ink Holdings Inc.Inventors: Wen-Chung Tang, Fang-An Shu, Yao-Chou Tsai, Ted-Hong Shinn
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Patent number: 8927981Abstract: The drain voltage of a transistor is determined depending on the driving voltage of an element connected to the transistor. With downsizing of a transistor, intensity of the electric field concentrated in the drain region is increased, and hot carriers are easily generated. An object is to provide a transistor in which the electric field hardly concentrates in the drain region. Another object is to provide a display device including such a transistor. End portions of first and second wiring layers having high electrical conductivity do not overlap with a gate electrode layer, whereby concentration of an electric field in the vicinity of a first electrode layer and a second electrode layer is reduced; thus, generation of hot carriers is suppressed. In addition, one of the first and second electrode layers having higher resistivity than the first and second wiring layers is used as a drain electrode layer.Type: GrantFiled: March 17, 2010Date of Patent: January 6, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kengo Akimoto, Hiromichi Godo, Akiharu Miyanaga
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Patent number: 8927994Abstract: Disclosed is a display device and an electronic apparatus incorporating the display device. The display device includes a transistor and a planarization film over the transistor. The planarization film has an opening where an edge portion is rounded. The display device further includes a first electrode over the planarization film and an organic resin film over the first electrode. The organic resin film also has an opening where an edge portion is rounded. The organic resin film is located in the opening of the planarization film. The first electrode and the transistor are electrically connected to each other through a conductive film. The first electrode is in contact with a top surface of the conductive film. Over the first electrode, a light-emitting member and a second electrode are provided.Type: GrantFiled: March 11, 2014Date of Patent: January 6, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Satoshi Murakami, Mitsuaki Osame
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Patent number: 8921850Abstract: A thin film transistor (TFT), a method for fabricating a TFT, an array substrate for a display device having a TFT, and a method for fabricating the same are provided. An oxide thin film transistor (TFT) includes: a gate electrode formed on a substrate; a gate insulating layer formed on the gate electrode; an active layer formed on the gate insulating layer above the gate electrode; an etch stop layer pattern formed on the active layer; a source alignment element and a drain alignment element formed on the etch stop layer pattern and spaced apart from one another; and a source electrode in contact with the source alignment element and the active layer and a drain electrode in contact with the drain alignment element and the active layer.Type: GrantFiled: December 27, 2012Date of Patent: December 30, 2014Assignee: LG Display Co., Ltd.Inventor: SangHee Yu
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Patent number: 8912040Abstract: An object is to establish a processing technique in manufacture of a semiconductor device in which an oxide semiconductor is used. A gate electrode is formed over a substrate, a gate insulating layer is formed over the gate electrode, an oxide semiconductor layer is formed over the gate insulating layer, the oxide semiconductor layer is processed by wet etching to form an island-shaped oxide semiconductor layer, a conductive layer is formed to cover the island-shaped oxide semiconductor layer, the conductive layer is processed by dry etching to form a source electrode, and a drain electrode and part of the island-shaped oxide semiconductor layer is removed by dry etching to form a recessed portion in the island-shaped oxide semiconductor layer.Type: GrantFiled: January 25, 2011Date of Patent: December 16, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hideomi Suzawa, Shinya Sasagawa, Taiga Muraoka
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Patent number: 8912057Abstract: A semiconductor device with an n-type transistor and a p-type transistor having an active region is provided. The active region further includes two adjacent gate structures. A portion of a dielectric layer between the two adjacent gate structures is selectively removed to form a contact opening having a bottom and sidewalls over the active region. A bilayer liner is selectively provided within the contact opening in the n-type transistor and a monolayer liner is provided within the contact opening in the p-type transistor. The contact opening in the n-type transistor and p-type transistor is filled with contact material. The monolayer liner is treated to form a silicide lacking nickel in the p-type transistor.Type: GrantFiled: June 5, 2013Date of Patent: December 16, 2014Assignee: GLOBALFOUNDRIES Inc.Inventor: Derya Deniz
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Patent number: 8907325Abstract: A thin film transistor disposed on a substrate is provided. The thin film transistor includes a gate, a semi-conductive layer, a gate insulator, a source and a drain. The gate insulator is located between the gate and the semi-conductive layer. A light shows a specific color after passing through the gate insulator. The source and the drain are disposed on the semi-conductive layer. A pixel structure and a liquid crystal display panel having the pixel structure are also provided. The liquid crystal display panel can display colorful images without disposing a color filter array additionally so that the manufacturing process of the liquid crystal panel is simple and the manufacturing cost of the liquid crystal panel is low.Type: GrantFiled: October 26, 2007Date of Patent: December 9, 2014Assignee: Au Optronics CorporationInventors: Chiao-Shun Chuang, Fang-Chung Chen, Han-Ping David Shieh
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Patent number: 8900938Abstract: A manufacturing method of the array substrate includes the steps: A. A first mask manufacturing process is adopted to from scan lines and thin film transistor (TFT) gates on a surface of a substrate. B. A second mask manufacturing process is adopted to form scan lines and data lines of the array substrate, a source electrode and a drain electrode of TFT and a conducting channel positioned between the source electrode and the drain electrode. C. A photoresistor formed in the second mask manufacturing process is incinerated, and then, an a-Si film is paved on the surface of the array substrate. D. The photoresistor is stripped to form an undoped active layer. E. A third mask manufacturing process is adopted to form a transparent conducting layer on the surface of the drain electrode of the TFT. Only three mask manufacturing process in the present disclosure are needed to manufacture the entire array substrate.Type: GrantFiled: July 12, 2012Date of Patent: December 2, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Jun Wang
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Patent number: 8901658Abstract: A thin film transistor (TFT) is provided, which includes a gate, a semiconductor layer, an insulation layer, a source and a drain. The semiconductor layer has a first end and a second end opposite to the first end. The insulation layer is disposed between the gate and the semiconductor layer. The source clamps the first end of the semiconductor layer and the drain clamps the second end of the semiconductor layer.Type: GrantFiled: December 4, 2012Date of Patent: December 2, 2014Assignee: E Ink Holdings Inc.Inventors: Henry Wang, Chia-Chun Yeh, Xue-Hung Tsai, Ted-Hong Shinn
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Patent number: 8901562Abstract: There are provided a transistor and a radiation imaging device in which a shift in a threshold voltage due to radiation exposure may be suppressed. The transistor includes a first gate electrode, a first gate insulator, a semiconductor layer, a second gate insulator, and a second gate electrode in this order on a substrate. Each of the first and second gate insulators includes one or a plurality of silicon compound films having oxygen, and a total sum of thicknesses of the silicon compound films is 65 nm or less.Type: GrantFiled: December 22, 2011Date of Patent: December 2, 2014Assignee: Sony CorporationInventors: Yasuhiro Yamada, Tsutomu Tanaka, Makoto Takatoku
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Patent number: 8877573Abstract: A thin film transistor substrate and a method for manufacturing the same are discussed, in which the thin film transistor comprises a gate line and a data line arranged on a substrate to cross each other; a gate electrode connected with the gate line below the gate line; an active layer formed on the gate electrode; an etch stopper formed on the active layer; an ohmic contact layer formed on the etch stopper; source and drain electrodes formed on the ohmic contact layer; and a pixel electrode connected with the drain electrode. It is possible to prevent a crack from occurring in the gate insulating film during irradiation of the laser and prevent resistance of the gate electrode from being increased.Type: GrantFiled: October 7, 2013Date of Patent: November 4, 2014Assignee: LG Display Co., Ltd.Inventor: KiTae Kim
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Patent number: 8877571Abstract: Methods of anodizing aluminum using a hard mask and related embodiments of semiconductor devices are disclosed herein. Other methods and related embodiments are also disclosed herein.Type: GrantFiled: December 7, 2011Date of Patent: November 4, 2014Assignee: Arizona Board of Regents, a Body Corporate of the State of Arizona Acting for and on Behalf of Arizona State UniversityInventors: Jovan Trujillo, Curtis Moyer
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Patent number: 8878175Abstract: An object is to reduce a capacitance value of parasitic capacitance without decreasing driving capability of a transistor in a semiconductor device such as an active matrix display device. Further, another object is to provide a semiconductor device in which the capacitance value of the parasitic capacitance was reduced, at low cost. An insulating layer other than a gate insulating layer is provided between a wiring which is formed of the same material layer as a gate electrode of the transistor and a wiring which is formed of the same material layer as a source electrode or a drain electrode.Type: GrantFiled: July 3, 2012Date of Patent: November 4, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8871579Abstract: Provided is a manufacturing method for a semiconductor transistor comprising: forming a resist layer containing resist material on a base layer including a substrate; patterning the resist layer to form apertures therein; forming a metal layer by disposing metallic material to cover the resist layer and to fill the apertures formed in the resist layer; removing a metal oxide layer formed by oxidation of a top surface of the metal layer by performing cleaning by using a cleaning liquid; forming the source electrode and the drain electrode by removing the resist layer by using a dissolution liquid different from the cleaning liquid, the source electrode and the drain electrode constituted of the metallic material having been disposed in the apertures; and forming a semiconductor layer so as to cover the source electrode and the drain electrode.Type: GrantFiled: November 8, 2011Date of Patent: October 28, 2014Assignee: Panasonic CorporationInventors: Yuko Okumoto, Akihito Miyamoto
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Patent number: 8872186Abstract: A method for manufacturing a display device provided with gate wiring lines (112) disposed on a substrate to supply signals to TFTs, and a plurality of source wiring lines (111) disposed above the gate wiring lines, the method for manufacturing a display device including: a step of forming a first conductive pattern (31) that includes the gate wiring lines (112) by etching a gate metal layer with a first resist pattern as a mask; and a step of forming a second resist pattern (12) at a portion located between the source wirings (111) so as to expose a portion of an edge of an upper surface of the first conductive pattern (31) and so as to cover other parts thereof, at the aforementioned portion of the edge of the upper surface, the first conductive pattern (31) is etched off from the upper surface through an intermediate point along the direction of thickness.Type: GrantFiled: November 21, 2011Date of Patent: October 28, 2014Assignee: Sharp Kabushiki KaishaInventor: Tetsuya Yamauchi
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Patent number: 8860030Abstract: One object of the present invention is reduction of off current of a thin film transistor. Another object of the present invention is improvement of electric characteristics of the thin film transistor. Further, another object of the present invention is improvement of image quality of the display device including the thin film transistor. The thin film transistor includes a semiconductor film containing germanium at a concentration greater than or equal to 5 at. % and less than or equal to 100 at. % or a conductive film which is provided over a gate electrode with the gate insulating film interposed therebetween and which is provided in an inner region of the gate electrode so as not to overlap with an end portion of the gate electrode, a film covering at least a side surface of the semiconductor film containing germanium at a concentration greater than or equal to 5 at. % and less than or equal to 100 at.Type: GrantFiled: June 23, 2011Date of Patent: October 14, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8847234Abstract: A thin-film transistor array substrate and a fabrication method thereof according to an embodiment of the present invention are disclosed to form an interlayer insulating layer, thereby reducing a failure occurred during the process subsequent to a gate electrode. The thin-film transistor disclosed according to the present invention may include a substrate, a gate electrode formed on the substrate, a planarized insulating layer formed at a lateral surface portion of the gate electrode and at an upper portion of the substrate, a gate insulating layer formed on the planarized insulating layer containing an upper portion of the gate electrode, an active layer formed at an upper portion of the planarized insulating layer located at an upper side of the gate electrode, and a source electrode and a drain electrode formed on the active layer and separated from each other based on a channel region.Type: GrantFiled: August 1, 2012Date of Patent: September 30, 2014Assignee: LG Display Co., Ltd.Inventors: Tae-Young Oh, Heung-Lyul Cho, Ji-Eun Jung
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Patent number: 8835927Abstract: A display substrate includes a gate line extended in one direction of a base substrate, a first data line extended in a direction crossing the gate line, a transverse storage line extended in the extending direction of the gate line and crossing the first data line, a longitudinal storage line extended in the extending direction of the first data line and crossing the transverse storage line, a portion of an overlapping area between the longitudinal storage line and the transverse storage line is exposed in a contact part region having an opening partially exposing the transverse storage line. A contact electrode covers the contact part opening and makes electrical contact with each of the transverse storage line and the longitudinal storage line.Type: GrantFiled: November 14, 2012Date of Patent: September 16, 2014Assignee: Samsung Display Co., Ltd.Inventors: Jong-Woong Chang, Ho-Kyoon Kwon, Kee-Byem Kim, Yun-Soo Kim, Dae-Ho Song
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Patent number: 8823100Abstract: In one method of forming a semiconductor device, a first electrode is formed electrically coupled with a semiconductor material. After the first electrode is formed, an insulator is formed over the semiconductor material adjoining the first electrode and extending a selected distance from the first electrode. After the insulator is formed, a second electrode is formed electrically coupled with the semiconductor material adjoining the insulator.Type: GrantFiled: September 14, 2007Date of Patent: September 2, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Gregory Herman, Peter Mardllovich, Randy Hoffman
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Patent number: 8822279Abstract: A thin film transistor display panel includes a substrate, a gate wire on the substrate and including a gate line and a gate electrode; a gate insulating layer on the gate wire; a semiconductor layer on the gate insulating layer; a data wire including a source electrode on the semiconductor layer, a drain electrode opposing the source electrode with respect to the gate electrode, and a data line; a passivation layer on the data wire having a contact hole exposing the drain electrode; and a pixel electrode on the passivation layer and connected to the drain electrode through the contact hole. The gate wire has a first region and second region where the gate line and the gate electrode are positioned, respectively. The thickness of the gate wire in the first region is greater than the thickness of the gate wire in the second region.Type: GrantFiled: September 25, 2013Date of Patent: September 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Hyung-Jun Kim, Chang-Oh Jeong, Jae-Hong Kim
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Patent number: 8816346Abstract: A TFT array substrate and a manufacturing method thereof, where the TFT array substrate includes a substrate; a gate line and a gate electrode integrated therewith, which are covered by a gate insulating layer, a semiconductor layer, and a ohmic contact layer sequentially. An insulating layer is formed on the resulting substrate and on both sides of the gate line and the gate electrode, the gate insulating layer, the semiconductor layer, and the ohmic contact layer. A trench is then formed in the ohmic contact layer to divide the ohmic contact layer over the semiconductor layer. A data line and first and second source/drain electrodes are then formed on the insulating layer and the ohmic contact layer.Type: GrantFiled: October 31, 2012Date of Patent: August 26, 2014Assignee: Beijing BOE Optoelectronics Technology Co., Ltd.Inventors: Zhangtao Wang, Haijun Qiu, Tae Yup Min, Seung Moo Rim
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Patent number: 8803155Abstract: According to an aspect of the present invention, there is provided a thin-film transistor (TFT) sensor, including a bottom gate electrode on a substrate, an insulation layer on the bottom gate electrode, an active layer in a donut shape on the insulation layer, the active layer including a channel through which a current generated by a charged body flows, an etch stop layer on the active layer, the etch stop layer including a first contact hole and a second contact hole, and a source electrode and a drain electrode burying the first and second contact holes, the source and drain electrodes being disposed on the etch stop layer so as to face each other.Type: GrantFiled: July 19, 2011Date of Patent: August 12, 2014Assignee: Samsung Display Co., Ltd.Inventors: Mu-Gyeom Kim, Chang-Mo Park
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Patent number: 8796078Abstract: An object is to provide a highly reliable semiconductor device including a thin film transistor having stable electric characteristics. In addition, another object is to manufacture a highly reliable semiconductor device at low cost with high productivity. In a method for manufacturing a semiconductor device including a thin film transistor including an oxide semiconductor layer as a channel formation region, the oxide semiconductor layer is heated under a nitrogen atmosphere to lower its resistance, thereby forming a low-resistance oxide semiconductor layer. Further, resistance of a region of the low-resistance oxide semiconductor layer, which is overlapped with a gate electrode layer, is selectively increased, thereby forming a high-resistance oxide semiconductor layer. Resistance of the oxide semiconductor layer is increased by forming a silicon oxide film in contact with the oxide semiconductor layer by a sputtering method.Type: GrantFiled: May 26, 2010Date of Patent: August 5, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Toshinari Sasaki, Hiroki Ohara, Junichiro Sakata
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Patent number: 8796692Abstract: A thin-film semiconductor device includes: a gate electrode; a channel layer; a first amorphous semiconductor layer; a channel protective layer; a pair of second amorphous semiconductor layers formed on side surfaces of the channel layer; and a pair of contact layers which contacts the side surfaces of the channel layer via the second amorphous semiconductor layers. The gate electrode, the channel layer, the first amorphous semiconductor layer, and the channel protective layer are stacked so as to have outlines that coincide with one another in a top view. The first amorphous semiconductor layer has a density of localized states higher than those of the second amorphous semiconductor layers. The second amorphous semiconductor layers have band gaps larger than that of the first amorphous semiconductor layer.Type: GrantFiled: October 23, 2012Date of Patent: August 5, 2014Assignee: Panasonic CorporationInventors: Arinobu Kanegae, Takahiro Kawashima
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Patent number: 8790960Abstract: A semiconductor device including an oxide semiconductor with stable electric characteristics and high reliability is provided. An island-shaped oxide semiconductor layer is formed by using a resist mask, the resist mask is removed, oxygen is introduced (added) to the oxide semiconductor layer, and heat treatment is performed. The removal of the resist mask, introduction of the oxygen, and heat treatment are performed successively without exposure to the air. Through the oxygen introduction and heat treatment, impurities such as hydrogen, moisture, a hydroxyl group, or hydride are intentionally removed from the oxide semiconductor layer, whereby the oxide semiconductor layer is highly purified. Chlorine may be introduced to an insulating layer over which the oxide semiconductor layer is formed before formation of the oxide semiconductor layer.Type: GrantFiled: April 13, 2011Date of Patent: July 29, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8790859Abstract: The present invention relates to a photoresist composition for digital exposure and a method of fabricating a thin film transistor substrate. The photoresist composition for digital exposure includes a binder resin including a novolak resin and a compound represented by the chemical formula (1), a photosensitizer including a diazide-based compound, and a solvent: wherein R1-R9 each include a hydrogen atom, an alkyl group, or a benzyl group, a is an integer from 0 to 10, b is an integer from 0 to 100, and c is an integer from 0 to 10.Type: GrantFiled: November 18, 2009Date of Patent: July 29, 2014Assignee: Samsung Display Co., Ltd.Inventors: Sang-Hyun Yun, Woo-Seok Jeon, Jung-In Park, Hi-Kuk Lee, Byung-Uk Kim, Dong-Min Kim, Seung-Ki Kim, Ja-Hun Byeon
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Patent number: 8785263Abstract: A thin-film transistor substrate includes a gate line, and a gate electrode connected to the gate line, on a base substrate; an insulating layer on the gate electrode, the insulating layer including a first part and a second part, the first part having a hydrophobic property and the second part having a hydrophilic property; a data line extended in a different direction from the gate line, and a source electrode connected to the data line and on the second part of the insulating layer; a drain electrode on the second part of the insulating layer, the drain electrode spaced apart from the source electrode; a semi-conductor pattern overlapping the source electrode, the drain electrode and a gap between the spaced apart source and drain electrodes, where the semi-conductor pattern exposes the first part of the insulating layer; and a pixel electrode in contact with the drain electrode.Type: GrantFiled: October 16, 2012Date of Patent: July 22, 2014Assignee: Samsung Display Co., Ltd.Inventors: Tae-Young Choi, Bo-Sung Kim
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Patent number: 8748895Abstract: Disclosed is a display device and an electronic apparatus incorporating the display device. The display device includes a transistor and a planarization film over the transistor. The planarization film has an opening where an edge portion is rounded. The display device further includes a first electrode over the planarization film and an organic resin film over the first electrode. The organic resin film also has an opening where an edge portion is rounded. The organic resin film is located in the opening of the planarization film. The first electrode and the transistor are electrically connected to each other through a conductive film. The first electrode is in contact with a top surface of the conductive film. Over the first electrode, a light-emitting member and a second electrode are provided.Type: GrantFiled: June 20, 2013Date of Patent: June 10, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Satoshi Murakami, Mitsuaki Osame
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Patent number: 8748242Abstract: A thin film transistor (TFT) structure is implemented. This embodiment is much less sensitive than conventional TFTs to alignment errors and substrate distortion. In such a configuration, there is no need to define gate features, so the layout is simplified. Moreover, the gate layer may be patterned by several inexpensive printing or non-printing methods.Type: GrantFiled: July 26, 2012Date of Patent: June 10, 2014Assignee: Palo Alto Research Center IncorporatedInventors: Jurgen H. Daniel, Ana Claudia Arias
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Patent number: 8735896Abstract: According to present invention, system on panel without complicating the process of TFT can be realized, and a light-emitting device that can be formed by lower cost than that of the conventional light-emitting device can be provided. A light-emitting device is provided in which a pixel portion is provided with a pixel including a light-emitting element and a TFT for controlling supply of current to the light-emitting element; a TFT included in a drive circuit and a TFT for controlling supply of current to the light-emitting element include a gate electrode, a gate insulating film formed over the gate electrode, a first semiconductor film, which overlaps with the gate electrode via the gate insulating film, a pair of second semiconductor films formed over the first semiconductor film; the pair of second semiconductor films are doped with an impurity to have one conductivity type; and the first semiconductor film is formed by semiamorphous semiconductor.Type: GrantFiled: January 31, 2013Date of Patent: May 27, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8735233Abstract: A crystalline silicon thin film is formed by irradiating a silicon thin film with a laser beam. The laser beam is a continuous wave laser beam. An intensity distribution of the laser beam in a first region about a center of the intensity distribution is symmetric on an anterior side and a posterior side of the center. The intensity distribution in a second region about the center is asymmetric on the anterior side and the posterior side. The first region is from the maximum intensity of the laser beam at the center to an intensity half of the maximum intensity. The second region is at most equal to the half of the maximum intensity of the laser beam. In the second region, an integral intensity value on the posterior side is larger than on the anterior side.Type: GrantFiled: April 19, 2012Date of Patent: May 27, 2014Assignee: Panasonic CorporationInventors: Tomohiko Oda, Takahiro Kawashima