Thin-film Transistor (epo) Patents (Class 257/E29.273)

  • Publication number: 20130020579
    Abstract: A display device which can suppress waveform distortion and lowered transmission coefficient of pixels, and suppress display irregularity is provided. In a display device having pixels arranged in a delta arrangement, a pixel includes a pixel portion which comprises a TFT including a source electrode, a drain electrode and a gate electrode, a common electrode and a pixel electrode, an organic passivation film has asymmetrical opening portions above a contact portion of the source electrode, and the orientations of the asymmetrical opening portions in the organic passivation films of pixels adjacent to each other are the same.
    Type: Application
    Filed: June 7, 2012
    Publication date: January 24, 2013
    Inventor: Takahiro NAGAMI
  • Publication number: 20130020567
    Abstract: A thin film transistor may include a passivation layer formed of a metal-containing conductive material. The thin film transistor includes: a gate electrode; a gate insulating layer positioned on the gate electrode; a channel layer positioned on the gate insulating layer; a source electrode and a drain electrode which are in contact with the channel layer while being spaced apart from each other; and a passivation layer including a metal-containing conductive material and positioned on the channel layer while being spaced apart from each of the source electrode and the drain electrode. The passivation layer serves to prevent transmission of light, oxygen, water and/or impurities into the channel layer and to improve the electrical characteristics of the thin film transistor.
    Type: Application
    Filed: December 7, 2011
    Publication date: January 24, 2013
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sang Yeol LEE, Eugene CHONG
  • Publication number: 20130020570
    Abstract: An object of the present invention is to provide a semiconductor device in which stored data can be held even when power is not supplied for a certain time. Another object is to increase the degree of integration of a semiconductor device and to increase the storage capacity per unit area. A semiconductor device is formed with a material capable of sufficiently reducing off-state current of a transistor, such as an oxide semiconductor material that is a wide-bandgap semiconductor. With the use of a semiconductor material capable of sufficiently reducing off-state current of a transistor, the semiconductor device can hold data for a long time. Furthermore, a wiring layer provided under a transistor, a high-resistance region in an oxide semiconductor film, and a source electrode are used to form a capacitor, thereby reducing the area occupied by the transistor and the capacitor.
    Type: Application
    Filed: July 16, 2012
    Publication date: January 24, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Shunpei YAMAZAKI
  • Publication number: 20130015459
    Abstract: A thin film transistor (TFT) array substrate includes a TFT on a substrate, the TFT including an active layer, gate electrode, source electrode, drain electrode, first insulating layer between the active layer and the gate electrode, and second insulating layer between the gate electrode and the source and drain electrodes; a pixel electrode on the first insulating layer and the second insulating layer, the pixel electrode being connected to one of the source electrode and drain electrode; a capacitor including a lower electrode on a same layer as the gate electrode and an upper electrode including the same material as the pixel electrode; a third insulating layer directly between the second insulating layer and the pixel electrode and between the lower electrode and the upper electrode; and a fourth insulating layer covering the source electrode, the drain electrode, and the upper electrode, and exposing the pixel electrode.
    Type: Application
    Filed: December 12, 2011
    Publication date: January 17, 2013
    Inventors: June-Woo Lee, Jae-Beom Choi, Kwan-Wook Jung, Jae-Hwan Oh, Seong-Hyun Jin, Kwang-Hae Kim, Jong-Hyun Choi
  • Publication number: 20130015457
    Abstract: An organic light-emitting display device and a method of manufacturing the same. The organic light-emitting display device includes: a thin-film transistor including an active layer, a gate electrode comprising a first electrode and a second electrode on the first electrode, and source and drain electrodes; an organic light-emitting device including a pixel electrode electrically connected to the thin-film transistor and including nano-Ag, an intermediate layer comprising a light-emitting layer, and an opposite electrode covering the intermediate layer and facing the pixel electrode; and a pad electrode formed on the same plane as and formed of the same material as the first electrode in a pad area outside of a light-emitting area.
    Type: Application
    Filed: December 2, 2011
    Publication date: January 17, 2013
    Inventor: Chun-Gi You
  • Publication number: 20130015454
    Abstract: Via holes for connecting elements of the panel structure may be formed by performing one process. For example, via holes for connecting a transistor and a conductive layer spaced apart from the transistor may be formed by performing only one process.
    Type: Application
    Filed: September 17, 2012
    Publication date: January 17, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Samsung Electronics Co., Ltd.
  • Publication number: 20130015453
    Abstract: A display device including a display element and a thin-film transistor for controlling light emission from the display element. The thin-film transistor includes: a gate electrode formed on an insulating support substrate; a gate insulating film formed on the substrate so as to cover the gate electrode; a channel layer formed on the gate insulating film; a channel protective layer formed on the top surface of the channel layer; a pair of contact layers formed on the top surface of the channel protective layer and connected to the channel layer; and a source electrode and a drain electrode each connected to the pair of contact layers. The pair of contact layers has an interface contacting the side surface of the channel layer.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 17, 2013
    Applicant: Panasonic Corporation
    Inventor: Ichiro SATO
  • Patent number: 8354672
    Abstract: A thin film transistor array panel can include: a substrate; a gate line formed on the substrate; a gate pad formed at an end of the gate line; a gate identification member corresponding to the gate pad and formed in the same layer as the gate pad; a gate insulating layer covering the gate line and the gate identification member; a data line formed on the gate insulating layer; a passivation layer formed on the gate insulating layer and the data line; a gate contact assistant formed on the passivation layer; and a gate driving chip electrically connected to the gate contact assistant, wherein the gate contact assistant at least partially overlaps the gate identification member. The gate identification member is formed without producing a step in the gate contact assistant, reducing the risk of defects when wires or other objects are pressed onto the gate pad.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: January 15, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Ho-Kyoon Kwon
  • Patent number: 8354674
    Abstract: It is an object to provide a semiconductor device which has a large size and operates at high speed. A top gate transistor which includes a semiconductor layer of single-crystal and a bottom gate transistor which includes a semiconductor layer of amorphous silicon (microcrystalline silicon) are formed over the same substrate. Then, gate electrodes of each transistor are formed with the same layer, and source and drain electrodes are also formed with the same layer. Thus, manufacturing steps are reduced. In other words, two types of transistors can be manufactured by adding only a few steps to the manufacturing process of a bottom gate transistor.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: January 15, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Publication number: 20130009158
    Abstract: A pixel structure disposed on a substrate having an array of pixel areas is provided. The common electrode wire is positioned only in a portion of the pixel area. A first capacitance storage electrode is disposed in each of the pixel areas and electrically connected between two adjacent common electrode wires. A gate insulation layer covers the scan line, the gate electrode, the common electrode wire and the first capacitance storage electrode. A semiconductor layer is disposed on the gate insulation layer above the gate electrode. The source and the drain are disposed on two sides of the semiconductor layer. A passivation layer is disposed on the substrate to cover the data line, the source and the drain. The passivation layer above the drain has a contact window. A pixel electrode is electrically connected with the drain through the contact window.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventor: Meng-Chi Liou
  • Publication number: 20130009154
    Abstract: An array substrate for an organic electroluminescent display device includes a substrate including a display area and a non-display area; a gate line and a data line; a thin film transistor including a semiconductor layer of polycrystalline silicon, a gate insulating layer, a gate electrode, an inter insulating layer, a source electrode, and a drain electrode; auxiliary lines formed of a same material and on a same layer as the data line; a passivation layer of organic insulating material and including a drain contact hole exposing the drain electrode, and an auxiliary line contact hole exposing one of the auxiliary lines; and a first electrode and a line connection pattern on the passivation layer, wherein the first electrode contacts the drain electrode and the line connection pattern contacts the one of the first auxiliary pattern.
    Type: Application
    Filed: December 28, 2011
    Publication date: January 10, 2013
    Inventors: Hee-Dong CHOI, Seung-Joon JEON
  • Publication number: 20130009148
    Abstract: Stable electrical characteristics and high reliability are provided for a semiconductor device including an oxide semiconductor. In a transistor including an oxide semiconductor layer, a buffer layer containing a constituent similar to that of the oxide semiconductor layer is provided in contact with a top surface and a bottom surface of the oxide semiconductor layer. Such a transistor and a semiconductor device including the transistor are provided. As the buffer layer in contact with the oxide semiconductor layer, a film containing an oxide of one or more elements selected from aluminum, gallium, zirconium, hafnium, and a rare earth element can be used.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 10, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Shunpei Yamazaki
  • Publication number: 20130009246
    Abstract: A fin Field Effect Transistor (finFET), an array of finFETs, and methods of production thereof. The finFETs are provided on an insulating region, which may optionally contain dopants. Further, the finFETs are optionally capped with a pad. The finFETs provided in an array are of uniform height.
    Type: Application
    Filed: July 5, 2011
    Publication date: January 10, 2013
    Applicant: International Business Machines Corporation
    Inventors: Kangguo Cheng, Bruce B. Doris
  • Publication number: 20130009220
    Abstract: A transistor which is formed using an oxide semiconductor layer and has electric characteristics needed for the intended use, and a semiconductor device including the transistor are provided. The transistor is formed using an oxide semiconductor stack including at least a first oxide semiconductor layer in contact with a source electrode layer and a drain electrode layer and a second oxide semiconductor layer which is provided over the first oxide semiconductor layer and has an energy gap different from that of the first oxide semiconductor layer. There is no limitation on the stacking order of the first oxide semiconductor layer and the second oxide semiconductor layer as long as their energy gaps are different from each other.
    Type: Application
    Filed: June 26, 2012
    Publication date: January 10, 2013
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Satoshi SHINOHARA
  • Publication number: 20130009151
    Abstract: A TFT array substrate includes a semiconductive oxide layer disposed on an insulating substrate and including a channel portion, a gate electrode overlapping the semiconductive oxide layer, a gate insulating layer interposed between the semiconductive oxide layer and the gate electrode, and a passivation layer disposed on the semiconductive oxide layer and the gate electrode. At least one of the gate insulating layer and the passivation layer includes an oxynitride layer, and the oxynitride layer has a higher concentration of oxygen than that of nitrogen in a location of the oxynitride layer closer to the semiconductive oxide layer.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 10, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Je-Hun LEE, Ki-Won KIM, Do-Hyun KIM, Woo-Geun LEE, Kap-Soo YOON
  • Publication number: 20130001582
    Abstract: A reduction in contaminating impurities in a TFT, and a TFT which is reliable, is obtained in a semiconductor device which uses the TFT. By removing contaminating impurities residing in a film interface of the TFT using a solution containing fluorine, a reliable TFT can be obtained.
    Type: Application
    Filed: September 10, 2012
    Publication date: January 3, 2013
    Inventors: Masaya Kadono, Shunpei Yamazaki, Yukio Yamauchi, Hidehito Kitakado
  • Publication number: 20130001556
    Abstract: A thin film transistor and a press sensing device using the thin film transistor are disclosed. The thin film transistor, comprises a source electrode; a drain electrode spaced from the source electrode; a semiconductor layer electrically connected with the source electrode and the drain electrode, a channel defined in the semiconductor layer and located between the source electrode and the drain electrode; and a gate electrode electrically insulated from the semiconductor layer; and an insulative layer configured for insulating the source electrode, the drain electrode, and the semiconductor layer from each other, wherein the insulative layer is made of a polymeric material with an elastic modulus ranged from about 0.1 megapascal (MPa) to about 10 MPa.
    Type: Application
    Filed: December 13, 2011
    Publication date: January 3, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: CHUN-HUA HU, CHANG-HONG LIU, SHOU-SHAN FAN
  • Publication number: 20130001577
    Abstract: In one aspect, a back plane for a flat panel display apparatus include: a substrate; a source electrode and a drain electrode formed on the substrate; a capacitor bottom electrode formed on a same layer as the source/drain electrodes; an active layer formed on the substrate in correspondence to the source electrode and the drain electrode; a blocking layer interposed between the source electrode and the drain electrode and the active layer; a first insulation layer formed on the substrate to cover the active layer; a gate electrode formed on the first insulation layer in correspondence to the active layer; a capacitor top electrode formed on a same layer as the gate electrode in correspondence to the capacitor bottom electrode; and a second insulation layer formed on the first insulation layer to cover the gate electrode and the capacitor top electrode is provided.
    Type: Application
    Filed: June 12, 2012
    Publication date: January 3, 2013
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Kwang-Suk KIM, Min-Kyu KIM
  • Publication number: 20130001545
    Abstract: An object is to increase field effect mobility of a thin film transistor including an oxide semiconductor. Another object is to stabilize electrical characteristics of the thin film transistor. In a thin film transistor including an oxide semiconductor layer, a semiconductor layer or a conductive layer having higher electrical conductivity than the oxide semiconductor is formed over the oxide semiconductor layer, whereby field effect mobility of the thin film transistor can be increased. Further, by forming a semiconductor layer or a conductive layer having higher electrical conductivity than the oxide semiconductor between the oxide semiconductor layer and a protective insulating layer of the thin film transistor, change in composition or deterioration in film quality of the oxide semiconductor layer is prevented, so that electrical characteristics of the thin film transistor can be stabilized.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 3, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Hideaki KUWABARA, Kengo AKIMOTO, Toshinari SASAKI
  • Publication number: 20130001546
    Abstract: A display device includes: a plurality of stripe-shaped data electrodes that are formed on a first substrate and that extend in the column direction; a plurality of scanning lines and a plurality of reference signal lines that are formed on a second substrate and that extend in the row direction; a plurality of pixel electrodes that are formed on the second substrate and that are disposed in a matrix arrangement; a plurality of switching elements that are formed on the second substrate and in which on/off is controlled by the plurality of scanning lines, and that are disposed between the plurality of reference signal lines and the plurality of pixel electrodes; and an oxide semiconductor layer that is disposed between a source electrode and a drain electrode. The switching elements are formed so as to be disposed in the vicinity of a gate electrode on the oxide semiconductor layer, with an insulating layer interposed therebetween.
    Type: Application
    Filed: March 18, 2011
    Publication date: January 3, 2013
    Inventors: Tsuyoshi Kamada, Shigeru Aomori, Tetsuya Ide, Seiji Ohhashi, Shohei Katsuta
  • Publication number: 20130001568
    Abstract: This invention provides a semiconductor device having high operation performance and high reliability. An LDD region 707 overlapping with a gate wiring is arranged in an n-channel TFT 802 forming a driving circuit, and a TFT structure highly resistant to hot carrier injection is achieved. LDD regions 717, 718, 719 and 720 not overlapping with a gate wiring are arranged in an n-channel TFT 804 forming a pixel unit. As a result, a TFT structure having a small OFF current value is achieved. In this instance, an element belonging to the Group 15 of the Periodic Table exists in a higher concentration in the LDD region 707 than in the LDD regions 717, 718, 719 and 720.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Satoshi MURAKAMI, Jun KOYAMA, Yukio TANAKA, Hidehito KITAKADO, Hideto OHNUMA
  • Publication number: 20130001544
    Abstract: A more convenient and highly reliable semiconductor device which has a transistor including an oxide semiconductor with higher impact resistance used for a variety of applications is provided. A semiconductor device has a bottom-gate transistor including a gate electrode layer, a gate insulating layer, and an oxide semiconductor layer over a substrate, an insulating layer over the transistor, and a conductive layer over the insulating layer. The insulating layer covers the oxide semiconductor layer and is in contact with the gate insulating layer. In a channel width direction of the oxide semiconductor layer, end portions of the gate insulating layer and the insulating layer are aligned with each other over the gate electrode layer, and the conductive layer covers a channel formation region of the oxide semiconductor layer and the end portions of the gate insulating layer and the insulating layer and is in contact with the gate electrode layer.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 3, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Shunpei YAMAZAKI
  • Publication number: 20130002616
    Abstract: A thin film transistor, a pixel, and an organic light emitting diode (OLED) display including the same are disclosed. The thin film transistor includes a connection to the channel region separate from connections to the source and drain.
    Type: Application
    Filed: November 4, 2011
    Publication date: January 3, 2013
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Chang-Yeop Kim, Won-Kyu Kwak, Jin-Tae Jeong
  • Publication number: 20130001581
    Abstract: A first insulating thin film having a large dielectric constant such as a silicon nitride film is formed so as to cover a source line and a metal wiring that is in the same layer as the source line. A second insulating film that is high in flatness is formed on the first insulating film. An opening is formed in the second insulating film by etching the second insulating film, to selectively expose the first insulating film. A conductive film to serve as a light-interruptive film is formed on the second insulating film and in the opening, whereby an auxiliary capacitor of the pixel is formed between the conductive film and the metal wiring with the first insulating film serving as a dielectric.
    Type: Application
    Filed: August 16, 2012
    Publication date: January 3, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Hisashi OHTANI, Yasushi OGATA
  • Publication number: 20130001583
    Abstract: This invention provides a semiconductor device having high operation performance and high reliability. An LDD region 707 overlapping with a gate wiring is arranged in an n-channel TFT 802 forming a driving circuit, and a TFT structure highly resistant to hot carrier injection is achieved. LDD regions 717, 718, 719 and 720 not overlapping with a gate wiring are arranged in an n-channel TFT 804 forming a pixel unit. As a result, a TFT structure having a small OFF current value is achieved. In this instance, an element belonging to the Group 15 of the Periodic Table exists in a higher concentration in the LDD region 707 than in the LDD regions 717, 718, 719 and 720.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Satoshi MURAKAMI, Jun KOYAMA, Yukio TANAKA, Hidehito KITAKADO, Hideto OHNUMA
  • Patent number: 8344390
    Abstract: The objective is to achieve an organic thin film transistor group that can be manufactured more easily and at a lower cost. Provided is a thin film active element group comprising a drive active element having a semiconductor channel layer formed in a channel region between a source electrode and a drain electrode; and a switch active element having a semiconductor channel layer formed in a channel region between a source electrode and a drain electrode, the switch active element switching the drive active element. The drive active element and the switch active element are formed to be separated from each other in a direction of a channel width such that a straight line associated with the channel region of the drive active element and a straight line associated with the channel region of the switch active element are parallel to each other.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: January 1, 2013
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tomonori Matsumuro, Kenji Kasahara, Yukiya Nishioka
  • Publication number: 20120326144
    Abstract: A method includes: a step of forming a gate electrode (14) on a substrate (10a); a step of forming a gate insulating film (15) to cover the gate electrode (14), and then forming an In-Ga-Zn-O-based oxide semiconductor layer (16) in which a ratio of In:Ga:Zn in atomic % is 1:1:1 or 4:5:1 on the gate insulating film (15) to overlap the gate electrode (14); a step of forming a source electrode (19a) and a drain electrode (19b) on the oxide semiconductor layer (16) to overlap the gate electrode (14) and to face each other; and a step of performing an annealing process in an atmosphere containing steam (S) on the substrate (10a) provided with the source electrode (19a) and the drain electrode (19b).
    Type: Application
    Filed: February 9, 2011
    Publication date: December 27, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yoshifumi Ohta, Yoshimasa Chikama, Masahiko Suzuki, Okifumi Nakagawa, Yoshiyuki Harumoto
  • Publication number: 20120326148
    Abstract: A thin film transistor array panel and a manufacturing method therefor. A shorting bar for connecting a thin film transistor with data lines is formed separate from the data lines, and then the data lines and the shorting bar are connected through a connecting member. As a result, all the data lines are floated during manufacture, so that variation in etching speed between data lines does not occur. Since variation in etching speed between the data lines can be prevented, performance deterioration of the transistor caused by a thickness difference in the lower layer of the data line can be prevented, as can resulting deterioration in display quality. Also, the influence of static electricity can be reduced or eliminated. Furthermore, since the data lines and the shorting bar are connected to each other, the generation of static electricity can be prevented or reduced, and quality testing is more readily performed.
    Type: Application
    Filed: May 7, 2012
    Publication date: December 27, 2012
    Inventors: Gwang-Bum KO, Sang Jin Jeon
  • Publication number: 20120326156
    Abstract: An organic light-emitting display apparatus includes a substrate, a thin-film transistor (TFT) on the substrate, the TFT including an active layer, a gate electrode, a source electrode, and a drain electrode, a first insulating film between the gate electrode and the source electrode and between the gate electrode and the drain electrode, a second insulating film between the first insulating film and the source electrode and between the first insulating film and the drain electrode, the second insulating film including an opening, a first electrode between the first insulating film and the second insulating film, the first electrode including a region corresponding to the opening of the second insulating film, an intermediate layer including an organic light-emitting layer, and a second electrode on the intermediate layer.
    Type: Application
    Filed: September 30, 2011
    Publication date: December 27, 2012
    Inventors: Jong-Hyun Choi, Jae-Beom Choi
  • Publication number: 20120326153
    Abstract: According to an embodiment of the present invention, a thin film transistor array panel includes a gate line and a data line insulated from each other an insulating substrate where the gate line and the data line cross each other to define a pixel region, a thin film transistor (TFT) disposed at an intersection of the gate line and the data line, a floating electrode where at least a portion of the floating electrode overlaps the data line, and a pixel electrode disposed at the pixel region where the pixel electrode is connected to the TFT and overlaps the at least a portion of the floating electrode.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 27, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jong-woong CHANG
  • Publication number: 20120326152
    Abstract: A thin film transistor substrate includes a base substrate; a first insulating layer disposed on the base electrode; source and drain electrodes disposed on the first insulating layer to be spaced apart from each other; a semiconductor layer disposed on the source electrode, the drain electrode, and the first insulating layer; a second insulating layer disposed on the semiconductor layer; and a gate electrode disposed on the second insulating layer to overlap with the source electrode and the drain electrode.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 27, 2012
    Inventors: Tae-Young CHOI, Doohyoung LEE, Yeontaek JEONG, Seon-Pil JANG, Bo Sung KIM, Youngmin KIM
  • Publication number: 20120326154
    Abstract: A method of making a thin film transistor made of a stack of an organic semiconductor layer, a gate insulating film and a gate electrode in this order on a substrate, which includes the steps of pattern coating a gate electrode material on the gate insulating film by printing; and carrying out a heat treatment to form the gate electrode resulting from drying for solidification of the pattern coated gate electrode material.
    Type: Application
    Filed: September 7, 2012
    Publication date: December 27, 2012
    Applicant: SONY CORPORATION
    Inventors: Noriyuki Kawashima, Kazumasa Nomoto, Akihiro Nomoto
  • Publication number: 20120326158
    Abstract: A flat panel display having a thin-film transistor (TFT) and a pixel unit and a method of manufacturing the same are disclosed. In one embodiment, the method includes forming a step difference layer having a relatively high step and a relatively low step on a substrate and forming an amorphous silicon layer on the step difference layer along a height shape of the step difference layer. The method further includes crystallizing the amorphous silicon layer into a crystalline silicon layer and polishing the crystalline silicon layer to form a planarized surface of the crystalline silicon layer having no height differences so that the crystalline silicon layer remains on a region corresponding to the low step and an active layer is formed. According to this method, crystallization protrusions are effectively removed from the active layer, and thus, stable brightness characteristics of the display apparatus are guaranteed.
    Type: Application
    Filed: April 24, 2012
    Publication date: December 27, 2012
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventor: Cheol-Ho Park
  • Publication number: 20120319119
    Abstract: A display substrate in accordance with one or more embodiments includes a first line pattern, a first insulation layer, a second line pattern, a color filter layer and a pixel electrode, which are formed on a substrate. The first line pattern includes a gate line and a light-blocking layer. The light-blocking layer has a first opening portion formed in a storage capacitor region. The first insulation layer is formed on the substrate having the first line pattern. The second line pattern is formed on the first insulation layer. The color filter layer is formed on the substrate having the second line pattern, and has a second opening portion overlapping with the storage electrode. The pixel electrode is formed on the substrate having the color filter layer. Thus, short circuits between the storage electrode and the pixel electrode may be prevented.
    Type: Application
    Filed: August 28, 2012
    Publication date: December 20, 2012
    Inventor: In-Woo Kim
  • Publication number: 20120319112
    Abstract: A thin film transistor includes a gate electrode, a gate insulating layer, an oxide semiconductor layer on the gate insulating layer, and a drain electrode and a source electrode on the oxide semiconductor layer and spaced apart from each other. The drain electrode includes a first drain sub-electrode on the oxide semiconductor layer, and a second drain sub-electrode on the first drain sub-electrode. The source electrode includes a first source sub-electrode on the oxide semiconductor layer, and a second source sub-electrode on the first source sub-electrode. The first drain sub-electrode and the first source sub-electrode include gallium zinc oxide (GaZnO), and the second source sub-electrode and the second drain sub-electrode include a metal atom.
    Type: Application
    Filed: September 1, 2011
    Publication date: December 20, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-Haeng CHO, Jae-Woo PARK, Do-Hyun KIM
  • Publication number: 20120319108
    Abstract: To suppress deterioration in electrical characteristics in a transistor including an oxide semiconductor layer or a semiconductor device including the transistor. In a transistor in which a channel layer is formed using an oxide semiconductor, a silicon layer is provided in contact with a surface of the oxide semiconductor layer. Further, the silicon layer is provided in contact with at least a region of the oxide semiconductor layer, in which a channel is formed, and a source electrode layer and a drain electrode layer are provided in contact with regions of the oxide semiconductor layer, over which the silicon layer is not provided.
    Type: Application
    Filed: September 4, 2012
    Publication date: December 20, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Junichiro SAKATA, Hiromichi GODO, Takashi SHIMAZU
  • Publication number: 20120319107
    Abstract: An object of the present invention is to provide a liquid crystal display device which allows a desirable storage capacitor to be ensured in a pixel without decreasing the aperture ratio in response to changes in frame frequency. In a liquid crystal display device including a pixel transistor and two capacitive elements using an oxide semiconductor material in each pixel, one of the capacitive elements comprises a light-transmitting material to improve the aperture ratio of the pixel. Furthermore, through the use of characteristics of the light-transmitting capacitive element, the size of the storage capacitor in the pixel is varied by adjusting the voltage value of a capacitance value in response to the frame frequency varied depending on images displayed.
    Type: Application
    Filed: August 30, 2012
    Publication date: December 20, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Hiroyuki MIYAKE
  • Publication number: 20120319114
    Abstract: A transistor including an oxide semiconductor layer and having electric characteristics required depending on an intended use, and a semiconductor device including the transistor are provided. In a transistor in which a semiconductor layer, a source electrode layer and a drain electrode layer, a gate insulating film, and a gate electrode layer are stacked in this order over an oxide insulating film, an oxide semiconductor stack composed of at least two oxide semiconductor layers having different energy gaps is used as the semiconductor layer. Oxygen and/or a dopant may be introduced into the oxide semiconductor stack.
    Type: Application
    Filed: June 13, 2012
    Publication date: December 20, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Tatsuya HONDA
  • Publication number: 20120319117
    Abstract: A light-emitting panel includes a thin film semiconductor that includes a thin film transistor. The thin film transistor includes a gate electrode, a semiconductor layer above the gate electrode, a gate insulating film between the gate electrode and the semiconductor layer, a first electrode electrically connected to the semiconductor layer, and a second electrode. A first interlayer insulating film is above the thin film semiconductor. A gate line and an auxiliary line are above the first interlayer insulating film and between the first interlayer insulating film and a second interlayer insulating film. The gate line is electrically connected to the gate electrode. An electroluminescence emitter includes two electrodes and a light-emitting layer between the two electrodes. One of the two electrodes is connected to the auxiliary line.
    Type: Application
    Filed: August 24, 2012
    Publication date: December 20, 2012
    Applicant: PANASONIC CORPORATION
    Inventor: Arinobu Kanegae
  • Publication number: 20120319103
    Abstract: The present invention relates to a thin film transistor and a method of manufacturing the same. More particularly, the present invention relates to a thin film transistor that includes a zinc oxide material including Si as a channel material of a semiconductor layer, and a method of manufacturing the same.
    Type: Application
    Filed: August 3, 2012
    Publication date: December 20, 2012
    Inventor: Jung-Hyoung LEE
  • Publication number: 20120319100
    Abstract: A miniaturized semiconductor device in which an increase in power consumption is suppressed and a method for manufacturing the semiconductor device are provided. A highly reliable semiconductor device having stable electric characteristics and a method for manufacturing the semiconductor device are provided. An oxide semiconductor film is irradiated with ions accelerated by an electric field in order to reduce the average surface roughness of a surface of the oxide semiconductor film. Consequently, an increase in the leakage current and power consumption of a transistor can be suppressed. Moreover, by performing heat treatment so that the oxide semiconductor film includes a crystal having a c-axis substantially perpendicular to the surface of the oxide semiconductor film, a change in electric characteristics of the oxide semiconductor film due to irradiation with visible light or ultraviolet light can be suppressed.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 20, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Kyoko YOSHIOKA, Junichi KOEZUKA, Shinji OHNO, Yuichi SATO, Shinya SASAGAWA
  • Publication number: 20120319124
    Abstract: A display device with a display region and a non-display region surrounding the display region, the display device comprising: a first substrate and a second substrate. The first substrate comprises: a first insulating substrate; a gate line formed on the first insulating substrate; a pixel thin film transistor formed on the display region and electrically connected to the gate line; a pixel electrode electrically connected to the pixel thin film transistor; a gate driver formed on the non-display region and connected to the gate line; and a direct current (DC)/DC converter formed on the non-display region and having a capacitance part. The capacitance part includes: a first capacitance part with a first electrode, a first dielectric layer, and a second electrode; and a second capacitance part with the second electrode, a second dielectric layer, and a third electrode.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 20, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-hoon KIM, Keun-woo PARK, Kook-chul MOON, Pil-mo CHOI, Chul-ho KIM, Ho-suk MAENG, Sang-hoon LEE
  • Publication number: 20120319118
    Abstract: One object is to provide a transistor including an oxide semiconductor film which is used for the pixel portion of a display device and has high reliability. A display device has a first gate electrode; a first gate insulating film over the first gate electrode; an oxide semiconductor film over the first gate insulating film; a source electrode and a drain electrode over the oxide semiconductor film; a second gate insulating film over the source electrode, the drain electrode and the oxide semiconductor film; a second gate electrode over the second gate insulating film; an organic resin film having flatness over the second gate insulating film; a pixel electrode over the organic resin film having flatness, wherein the concentration of hydrogen atoms contained in the oxide semiconductor film and measured by secondary ion mass spectrometry is less than 1×1016 cm?3.
    Type: Application
    Filed: August 27, 2012
    Publication date: December 20, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Shunpei Yamazaki
  • Publication number: 20120313114
    Abstract: A method of manufacturing a thin film transistor (TFT), a TFT manufactured by the method, a method of manufacturing an organic light-emitting display apparatus that includes the TFT, a display including the TFT. By including a buffer layer below and an insulating layer above a silicon layer for the TFT, the silicon layer can be crystallized without being exposed to air, so that contamination can be prevented. Also, due to the overlying insulating layer, the silicon layer can be patterned without directly contacting photoresist. The result is a TFT with uniform and improved electrical characteristics, and an improved display apparatus.
    Type: Application
    Filed: September 23, 2011
    Publication date: December 13, 2012
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Byoung-Keon Park, Jong-Ryuk Park, Dong-Hyun Lee, Jin-Wook Seo, Ki-Yong Lee
  • Publication number: 20120313096
    Abstract: Provided are an oxide semiconductor composition, a preparation method thereof, an oxide semiconductor thin film using the composition, and a method of forming an electronic device. The oxide semiconductor composition includes a photosensitive material and an oxide semiconductor precursor.
    Type: Application
    Filed: January 4, 2012
    Publication date: December 13, 2012
    Applicant: Industry-Academics Cooperation Foundation, Yonsei University
    Inventors: Hyun Jae KIM, You Seung Rim, Hyun Soo Lim, Dong Lim Kim
  • Publication number: 20120313100
    Abstract: A pixel structure including a semiconductor layer having at least one source region and at least one drain region; a first insulating layer covering the semiconductor layer; a first conductive layer on the first insulating layer and including at least one gate; a second insulating layer covering the first conductive layer; a second conductive layer on the second insulating layer and including at least one source electrode, at least one drain electrode and at least one bottom electrode, the source region, the source electrode, the drain region, the drain electrode and the gate forming at least one thin film transistor; a third insulating layer covering the second conductive layer; a third conductive layer on the third insulating layer and including at least one top electrode, the top electrode and the bottom electrode forming at least one capacitor; and a pixel electrode electrically connected to the thin film transistor.
    Type: Application
    Filed: February 2, 2012
    Publication date: December 13, 2012
    Applicant: AU OPTRONICS CORPORATION
    Inventors: Chun-Yen Liu, Cheng-Chieh Tseng, Chia-Yuan Yeh
  • Publication number: 20120313915
    Abstract: A thin-film transistor (TFT) array and a liquid crystal display (LCD) panel thereof are described. The TFT array includes a plurality of scan lines, a plurality of data lines, a plurality of pixel units and a plurality of control transistors. When the control transistor turns on and a video signal is transmitted to the pixel unit, the second sub-pixel of another pixel unit is charged. When the gate electrode of the control transistor turns off and the switching transistor of the second sub-pixel of another pixel unit turns on, the second sub-pixel of another pixel unit charges the first sub-pixel of another pixel unit.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 13, 2012
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Shiqi Li
  • Publication number: 20120314149
    Abstract: The present invention discloses a pixel unit and has: a gate line; a source line; a drain line; an active element electrically connected to the gate line, the source line and the drain line; a pixel electrode including a main trunk and multiple stripped electrodes, and the main trunk is electrically connected to the drain line, the main trunk has a first predetermined angle with respect to a first polarization axis or a second polarization axis, and the main trunk at least has two segments, an end of each of the strip electrodes is connected to the main trunk and each of the strip electrodes has a second predetermined angle with respect to the main trunk. The present invention further discloses a liquid crystal display panel.
    Type: Application
    Filed: June 24, 2011
    Publication date: December 13, 2012
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Chihtsung Kang
  • Publication number: 20120313150
    Abstract: A thin film transistor includes: an organic semiconductor layer which is formed from a metal-containing material containing at least one of a metallic element and a semi-metallic element capable of reacting with an etching gas; a source electrode and a drain electrode spaced apart from each other; and an organic conductive layer which is inserted between the organic semiconductor layer and the source and drain electrodes in the regions where the organic semiconductor layer overlaps with the source and drain electrodes and which is formed from a non-metal-containing material not containing at least one of a metallic element and a semi-metallic element capable of reacting with the etching gas.
    Type: Application
    Filed: May 15, 2012
    Publication date: December 13, 2012
    Applicant: Sony Corporation
    Inventor: Mao Katsuhara
  • Publication number: 20120313098
    Abstract: An organic light-emitting display apparatus may include a substrate; a thin-film transistor (TFT) disposed on the substrate, and having an active layer, a gate electrode, a source electrode and a drain electrode; a signal line formed on the same layer as the source electrode and the drain electrode; a first insulating layer covers the signal line, the source electrode, and the drain electrode; a pixel electrode formed on the first insulating layer, and electrically connected to the TFT; a pixel-defining layer formed on the first insulating layer, includes an opening exposing the pixel electrode; an intermediate layer formed on the pixel electrode, and includes a light-emitting layer; and an opposite electrode formed on the intermediate layer. The intermediate layer is formed on the pixel-defining layer so as to overlap with the signal line.
    Type: Application
    Filed: September 23, 2011
    Publication date: December 13, 2012
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Ki-Wook Kim, Dong-Wook Park