Multistep Process (epo) Patents (Class 257/E21.46)
  • Publication number: 20110244683
    Abstract: A semiconductor structure is fabricated with a void such as a line, contact, via or zia. To prevent slurry particles from falling into and remaining in a void during a chemical-mechanical planarization process, a protective coat is provided in the void to trap the slurry particles and limit an extent to which they can enter the void. A metal layer is provided above the protective coat. Subsequently, the protective coat and trapped slurry particles are removed by cleaning, leaving a void which is substantially free of slurry particles. This is beneficial such as when the void is used as an alignment mark. The protective coat can be an organic layer such as spin-on carbon or i-line photoresist, an ashable material such as amorphous carbon, or a dissolvable and selective material such as SiN.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 6, 2011
    Inventor: Michiaki Sano
  • Patent number: 8030101
    Abstract: A method of manufacturing a low defect density GaN material comprising at least two steps of growing epitaxial layers of GaN with differences in growing conditions, (a.) a first step of growing an epitaxial layer GaN on an epitaxially competent layer under first growing conditions selected to induce island features formation, followed by (b.) a second step of growing an epitaxial layer of GaN under second growing conditions selected to enhance lateral growth until coalescence.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: October 4, 2011
    Assignee: Saint-Gobain Cristaux et Detecteurs
    Inventors: Eric Frayssinet, Bernard Beaumont, Jean-Pierre Faurie, Pierre Gibart
  • Publication number: 20110233537
    Abstract: An oxide thin film transistor includes a substrate, a gate layer, an oxide film and a gate insulating layer. The gate layer is disposed on the substrate. The oxide film is disposed on the substrate, and has a source region, a drain region and a channel region. The channel region is located between the source region and the drain region and corresponds to the gate layer. The electric conductivity of the source region and the drain region is greater than that of the channel region. The gate insulating layer is disposed on the substrate and located between the gate layer and the oxide film.
    Type: Application
    Filed: July 21, 2010
    Publication date: September 29, 2011
    Applicant: E Ink Holdings Inc.
    Inventors: Fang-An SHU, Ted-Hong Shinn, Sung-Hui Huang, Lee-Ting Chen, Yung-Sheng Chang
  • Publication number: 20110235678
    Abstract: The RTD device of the present invention is comprised of a semiconductor substrate and a substantially thin conductive metal layer disposed upon the semiconductor substrate, wherein the conductive metal has a substantially linear temperature-resistance relationship. The conductive layer is etched into a convoluted RTD pattern, which consequently increases the overall resistance and minimizes the overall mass of the RTD assembly. A contact glass cover and a conductive metal-glass frit are placed over the RTD assembly to hermetically seal the RTD. The resultant structure can be “upside-down” mounted onto a header or a flat shim so that the bottom surface of the semiconductor substrate is exposed to the external environment, thus shielding the RTD from external forces. The resultant structure is a low mass, highly conductive, leadless, and hermetically sealed RTD that accurately measures the temperature of liquids and gases and maintains fast response time in high temperatures and harsh environments.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 29, 2011
    Applicant: Kulite Semiconductor Products, Inc.
    Inventors: Anthony D. Kurtz, Nora Kurtz, Alex Ned, Vikram Patil, Joseph VanDeWeert
  • Publication number: 20110215317
    Abstract: Disclosed is a semiconductor device including an insulating layer, a source electrode and a drain electrode embedded in the insulating layer, an oxide semiconductor layer in contact with the insulating layer, the source electrode, and the drain electrode, a gate insulating layer covering the oxide semiconductor layer, and a gate electrode over the gate insulating layer. The upper surface of the surface of the insulating layer, which is in contact with the oxide semiconductor layer, has a root-mean-square (RMS) roughness of 1 nm or less. There is a difference in height between an upper surface of the insulating layer and each of an upper surface of the source electrode and an upper surface of the drain electrode. The difference in height is preferably 5 nm or more. This structure contributes to the suppression of defects of the semiconductor device and enables their miniaturization.
    Type: Application
    Filed: March 1, 2011
    Publication date: September 8, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Hiromichi GODO
  • Patent number: 7998828
    Abstract: A method of forming a metal ion transistor comprises forming a first electrode in a first isolation layer; forming a second isolation layer over the first isolation layer; forming a first cell region of a low dielectric constant (low-k) dielectric over the first electrode in the second isolation layer, the first cell region isolated from the second isolation layer; forming a cap layer over the second isolation layer and the first cell region, at least thinning the cap layer over the first cell region; depositing a layer of the low-k dielectric over the second isolation layer and the first cell region; forming metal ions in the low-k dielectric layer; patterning the low-k dielectric layer to form a second cell region; sealing the second cell region using a liner; and forming a second electrode contacting the second cell region and a third electrode contacting the second cell region.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: August 16, 2011
    Assignees: International Business Machines Corporation, Infineon Technologies North America
    Inventors: Fen Chen, Armin Fischer
  • Patent number: 7994573
    Abstract: A field effect transistor (FET) includes body regions of a first conductivity type over a semiconductor region of a second conductivity type. The body regions form p-n junctions with the semiconductor region. Source regions of the second conductivity type extend over the body regions. The source regions form p-n junctions with the body regions. Gate electrodes extend adjacent to but are insulated from the body regions by a gate dielectric. A carbon-containing region extends in the semiconductor region below the body regions.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: August 9, 2011
    Assignee: Fairchild Semiconductor Corporation
    Inventor: James Pan
  • Publication number: 20110189818
    Abstract: A method for manufacturing oxide thin film transistors includes steps of: forming a gate, a drain electrode, a source electrode, and an oxide semiconductor layer respectively. The oxide semiconductor layer is formed on the gate electrode; the drain electrode and the source electrode are formed at two opposite sides of the oxide semiconductor layer. The method further includes a step of depositing a dielectric layer of silicon oxide, and a reacting gas for depositing the silicon oxide includes silane and nitrous oxide. A flow rate of nitrous oxide is in a range from 10 to 200 standard cubic centimeters per minute (SCCM). Oxide thin film transistors manufactured by above method has advantages of low leakage, high mobility, and other integrated circuit member can be directly formed on the thin film transistor array substrate of a display device.
    Type: Application
    Filed: May 5, 2010
    Publication date: August 4, 2011
    Inventors: Ted-Hong SHINN, Henry WANG, Fang-An SHU, Yao-Chou TSAI
  • Publication number: 20110168994
    Abstract: Disclosed is a sputtering target that can suppress the occurrence of anomalous discharge in the formation of an oxide semiconductor film by sputtering method and can continuously and stably form a film. Also disclosed is an oxide for a sputtering target that has a rare earth oxide C-type crystal structure and has a surface free from white spots (a poor appearance such as concaves and convexes formed on the surface of the sputtering target). Further disclosed is an oxide sintered compact that has a bixbyite structure and contains indium oxide, gallium oxide, and zinc oxide. The composition amounts (atomic %) of indium (In), gallium (Ga), and zinc (Zn) fall within a composition range satisfying the following formula: In/(In+Ga+Zn)<0.
    Type: Application
    Filed: June 5, 2009
    Publication date: July 14, 2011
    Inventors: Hirokazu Kawashima, Koki Yano, Futoshi Utsuno, Kazuyoshi Inoue
  • Publication number: 20110155991
    Abstract: A resistive memory device and a fabricating method thereof are introduced herein. In resistive memory device, a plurality of bottom electrodes is disposed in active region of a substrate. Each of the bottom electrodes is disposed to correspond to each of the conductive channels; a patterned resistance switching material layer and the patterned top electrode layer are sequentially stacked on the bottom electrodes. An air dielectric layer exists between the patterned resistance switching material layer and the bottom electrodes. A plurality of patterned interconnections is disposed on the patterned top electrode.
    Type: Application
    Filed: December 30, 2009
    Publication date: June 30, 2011
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventor: Wei-Su Chen
  • Publication number: 20110156023
    Abstract: In a semiconductor device using a nonvolatile memory, high speed erasing operation and low power consumption are realized. In a nonvolatile memory in which a channel formation region, a tunnel insulating film, and a floating gate are stacked in this order, the channel formation region is formed using an oxide semiconductor layer. In addition, a metal wiring for erasing is provided in a lower side of the channel formation region so as to face the floating gate. With the above structure, when erasing operation is performed, charge accumulated in the floating gate is extracted to the metal wiring through the channel formation region. Consequently, high speed erasing operation and low power consumption of the semiconductor device can be realized.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 30, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Yoshinori IEDA
  • Publication number: 20110159692
    Abstract: A method for fabricating semiconductor device includes forming a nitride pattern and a hard mask pattern over a substrate, forming a trench by etching the substrate using the hard mask pattern as an etch barrier, forming an oxide layer filling the trench, performing a planarization process on the oxide layer until the nitride pattern is exposed, and removing the nitride pattern though a dry strip process using a plasma.
    Type: Application
    Filed: May 5, 2010
    Publication date: June 30, 2011
    Inventors: Won-Kyu Kim, Tae-Woo Jung, Chang-Hee Shin
  • Publication number: 20110147733
    Abstract: A semiconductor device structure on a substrate and a manufacture method thereof is provided. The semiconductor device structure includes an oxide semiconductor transistor and a passivation layer containing free hydrogen. The semiconductor device structure is formed by following steps. A gate electrode is formed on the substrate. A gate dielectric layer covers the gate electrode. A source electrode is formed on the gate dielectric layer. A drain electrode is formed on the gate dielectric layer and separated from the source electrode and thereby forming a channel distance. An oxide semiconductor layer is formed on the gate dielectric layer, the source electrode and the drain electrode and between the source electrode and the drain electrode. The oxide semiconductor layer is further electrically connected with the source electrode and the drain electrode. A passivation layer covers the oxide semiconductor layer, the source electrode and the drain electrode.
    Type: Application
    Filed: May 10, 2010
    Publication date: June 23, 2011
    Inventors: Yih-Chyun KAO, Chun-Nan Lin, Li-Kai Chen, Wen-Ching Tsai
  • Publication number: 20110151618
    Abstract: An oxide semiconductor layer with excellent crystallinity is formed to enable manufacture of transistors with excellent electrical characteristics for practical application of a large display device, a high-performance semiconductor device, etc. By first heat treatment, a first oxide semiconductor layer is crystallized. A second oxide semiconductor layer is formed over the first oxide semiconductor layer. By second heat treatment, an oxide semiconductor layer including a crystal region having the c-axis oriented substantially perpendicular to a surface is efficiently formed and oxygen vacancies are efficiently filled. An oxide insulating layer is formed over and in contact with the oxide semiconductor layer. By third heat treatment, oxygen is supplied again to the oxide semiconductor layer. A nitride insulating layer containing hydrogen is formed over the oxide insulating layer.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Hotaka MARUYAMA, Yoshiaki OIKAWA, Katsuaki TOCHIBAYASHI
  • Publication number: 20110140094
    Abstract: A thin film transistor array panel according to an exemplary embodiment of the present invention includes: a gate electrode disposed on an insulation substrate; a gate insulating layer disposed on the gate electrode; a semiconductor disposed on the gate insulating layer; an etching stop layer disposed on the semiconductor; an insulating layer disposed on the gate insulating layer; and a source electrode and a drain electrode overlapping the semiconductor. The semiconductor and the gate insulating layer have a first portion on which the etching stop layer and the insulating layer are disposed, and a second portion on which etching stop layer and the insulating layer are not disposed.
    Type: Application
    Filed: June 24, 2010
    Publication date: June 16, 2011
    Inventors: Tae-Young Choi, Hi-Kuk Lee, Bo-Sung Kim, Young-Min Kim, Seung-Hwan Cho, Young-Soo Yoon, Yeon-Taek Jeong, Seon-Pil Jang
  • Patent number: 7956361
    Abstract: An amorphous oxide containing hydrogen (or deuterium) is applied to a channel layer of a transistor. Accordingly, a thin film transistor having superior TFT properties can be realized, the superior TFT properties including a small hysteresis, normally OFF operation, a high ON/OFF ratio, a high saturated current, and the like. Furthermore, as a method for manufacturing a channel layer made of an amorphous oxide, film formation is performed in an atmosphere containing a hydrogen gas and an oxygen gas, so that the carrier concentration of the amorphous oxide can be controlled.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: June 7, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuya Iwasaki
  • Publication number: 20110127528
    Abstract: In a method for manufacturing a semiconductor device comprising an n-type transistor (Q1) that has a source electrode (4ns), a drain electrode (4d), an oxide semiconductor film (5), and a gate electrode (2), and that is formed on a substrate (1), and a p-type transistor (Q2) that has a source electrode (4ps), a drain electrode, an organic semiconductor film (7), and a gate electrode, and that is formed on the substrate, the gate electrode is formed on the substrate, the source electrode and the drain electrode are formed, the oxide semiconductor film is formed of an oxide semiconductor material; and the gate electrode is formed on the substrate, the source electrode and the drain electrode are formed, and the organic semiconductor film is formed of an organic semiconductor material.
    Type: Application
    Filed: July 22, 2009
    Publication date: June 2, 2011
    Applicant: Sumitomo Chemical Company, Limited
    Inventor: Tomonori Matsumuro
  • Publication number: 20110108709
    Abstract: A backside illuminated image sensor includes a photodiode, formed below the top surface of a semiconductor substrate, for receiving light illuminated from the backside of the semiconductor substrate to generate photoelectric charges, a reflecting gate, formed on the photodiode over the front upper surface of the semiconductor substrate, for reflecting light illuminated from the backside of the substrate and receiving a bias to control a depletion region of the photodiode, and a transfer gate for transferring photoelectric charges from the photodiode to a sensing node of a pixel.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 12, 2011
    Applicant: CROSSTEK CAPITAL, LLC
    Inventors: Sung-Hyung Park, Ju-IL Lee
  • Publication number: 20110111532
    Abstract: Methods of forming pattern structures and methods of manufacturing memory devices using the same are provided, the methods of forming pattern structures include forming an etching object layer on a substrate and performing a plasma reactive etching process on the etching object layer using an etching gas including at least ammonia (NH3) gas. The etching object layer includes a magnetic material or a phase change material.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 12, 2011
    Inventors: Yong-Hwan RYU, Jae-Seung HWANG, Sung-Un KWON, Kyoung-Ha EOM
  • Patent number: 7935582
    Abstract: An amorphous oxide containing hydrogen (or deuterium) is applied to a channel layer of a transistor. Accordingly, a thin film transistor having superior TFT properties can be realized, the superior TFT properties including a small hysteresis, normally OFF operation, a high ON/OFF ratio, a high saturated current, and the like. Furthermore, as a method for manufacturing a channel layer made of an amorphous oxide, film formation is performed in an atmosphere containing a hydrogen gas and an oxygen gas, so that the carrier concentration of the amorphous oxide can be controlled.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: May 3, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuya Iwasaki
  • Publication number: 20110084269
    Abstract: An object is to reduce contact resistance between an oxide semiconductor layer and source and drain electrode layers electrically connected to the oxide semiconductor layer in a thin film transistor including the oxide semiconductor layer. The source and drain electrode layers have a stacked structure of two or more layers. In this stack of layers, a layer in contact with the oxide semiconductor layer is a thin indium layer or a thin indium-alloy layer. Note that the oxide semiconductor layer contains indium. A second layer or second and any of subsequent layers in the source and drain electrode layers are formed using an element selected from Al, Cr, Cu, Ta, Ti, Mo, and W, an alloy containing any of these elements as a component, an alloy containing any of these elements in combination, or the like.
    Type: Application
    Filed: October 6, 2010
    Publication date: April 14, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei Yamazaki, Suzunosuke Hiraishi, Kengo Akimoto, Junichiro Sakata
  • Publication number: 20110084267
    Abstract: By using a conductive layer including Cu as a long lead wiring, increase in wiring resistance is suppressed. Further, the conductive layer including Cu is provided in such a manner that it does not overlap with the oxide semiconductor layer in which a channel region of a TFT is formed, and is surrounded by insulating layers including silicon nitride, whereby diffusion of Cu can be prevented; thus, a highly reliable semiconductor device can be manufactured. Specifically, a display device which is one embodiment of a semiconductor device can have high display quality and operate stably even when the size or definition thereof is increased.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 14, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei Yamazaki, Jun Koyama, Masahiro Takahashi, Hideyuki Kishida, Akiharu Miyanaga, Junpei Sugao, Hideki Uochi, Yasuo Nakamura
  • Patent number: 7923722
    Abstract: A TFT includes a zinc oxide (ZnO)-based channel layer having a plurality of semiconductor layers. An uppermost of the plurality of semiconductor layers has a Zn concentration less than that of a lower semiconductor layer to suppress an oxygen vacancy due to plasma. The uppermost semiconductor layer of the channel layer also has a tin (Sn) oxide, a chloride, a fluoride, or the like, which has a relatively stable bonding energy against plasma. The uppermost semiconductor layer is relatively strong against plasma shock and less decomposed when being exposed to plasma, thereby suppressing an increase in carrier concentration.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: April 12, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myung-kwan Ryu, Tae-sang Kim, Jang-yeon Kwon, Kyung-bae Park, Kyung-seok Son, Ji-sim Jung
  • Publication number: 20110079778
    Abstract: An object is to provide a semiconductor device with stable electric characteristics in which an oxide semiconductor is used. The impurity concentration in the oxide semiconductor layer is reduced in the following manner: a silicon oxide layer including many defects typified by dangling bonds is formed in contact with the oxide semiconductor layer, and an impurity such as hydrogen or moisture (a hydrogen atom or a compound including a hydrogen atom such as H2O) included in the oxide semiconductor layer is diffused into the silicon oxide layer. Further, a mixed region is provided between the oxide semiconductor layer and the silicon oxide layer. The mixed region includes oxygen, silicon, and at least one kind of metal element that is included in the oxide semiconductor.
    Type: Application
    Filed: September 30, 2010
    Publication date: April 7, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Akiharu MIYANAGA, Masahiro TAKAHASHI, Hideyuki KISHIDA, Junichiro SAKATA
  • Publication number: 20110070693
    Abstract: An object is to provide an oxide semiconductor having stable electric characteristics and a semiconductor device including the oxide semiconductor. A manufacturing method of a semiconductor film by a sputtering method includes the steps of holding a substrate in a treatment chamber which is kept in a reduced-pressure state; heating the substrate at lower than 400° C.; introducing a sputtering gas from which hydrogen and moisture are removed in the state where remaining moisture in the treatment chamber is removed; and forming an oxide semiconductor film over the substrate with use of a metal oxide which is provided in the treatment chamber as a target. When the oxide semiconductor film is formed, remaining moisture in a reaction atmosphere is removed; thus, the concentration of hydrogen and the concentration of hydride in the oxide semiconductor film can be reduced. Thus, the oxide semiconductor film can be stabilized.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 24, 2011
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Junichiro SAKATA, Akiharu MIYANAGA, Masayuki SAKAKURA, Junichi KOEZUKA, Tetsunori MARUYAMA, Yuki IMOTO
  • Publication number: 20110062431
    Abstract: A method of annealing a metal oxide on a temperature sensitive substrate formation includes the steps of providing a temperature sensitive substrate formation and forming a spacer layer on a surface of the substrate formation. A metal oxide semiconductor device is formed on the spacer layer, the device includes at least a layer of amorphous metal oxide semiconductor material, an interface of the amorphous metal oxide layer with a dielectric layer, and a gate metal layer adjacent the layer of amorphous metal oxide semiconductor material and the interface. The method then includes the step of at least partially annealing the layer of metal oxide semiconductor material by heating the adjacent gate metal layer with pulses of infra red radiation to improve the mobility and operating stability of the amorphous metal oxide semiconductor material while retaining at least the amorphous metal oxide semiconductor material adjacent the gate metal layer amorphous.
    Type: Application
    Filed: September 1, 2010
    Publication date: March 17, 2011
    Inventors: Chan-Long Shieh, Hsing-Chung Lee
  • Publication number: 20110049518
    Abstract: An object is to prevent contamination of a semiconductor film in a transistor or a semiconductor device including the transistor. Another object is to suppress variation in electrical characteristics and deterioration. A transistor including: a gate electrode layer provided over a substrate; a gate insulating film provided over the gate electrode layer; a semiconductor layer which is provided over the gate insulating film and which overlaps the gate electrode layer; a carbide layer provided over and in contact with a surface of the semiconductor layer; and a source electrode layer and a drain electrode layer which are electrically connected to the semiconductor layer is provided.
    Type: Application
    Filed: August 25, 2010
    Publication date: March 3, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Kosei Noda
  • Publication number: 20110042667
    Abstract: A method for manufacturing a thin film transistor (TFT) through a process including back exposure, in which oxide semiconductor is used for a channel layer; using an electrode over a substrate as a mask, negative resist is exposed to light from the back of the substrate; the negative resist except its exposed part is removed; and an electrode is shaped by etching a conductive film using the exposed part as an etching mask.
    Type: Application
    Filed: July 17, 2010
    Publication date: February 24, 2011
    Inventors: Tetsufumi KAWAMURA, Hiroyuki Uchiyama, Hironori Wakana, Mutsuko Hatano, Takeshi Sato
  • Publication number: 20110031490
    Abstract: A method is proposed for producing a thin-film transistor (TFT), the method comprising forming a substrate, applying a ZnO-based precursor solution onto the substrate to form a ZnO-based channel layer, annealing the channel layer, forming a source electrode and a drain electrode on the channel layer, forming a dielectric layer on the channel layer and forming a gate electrode on the dielectric layer.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 10, 2011
    Applicant: SONY CORPORATION
    Inventors: CHUNMEI WANG, WEI BENG NG, TAKEHISA ISHIDA
  • Publication number: 20110032444
    Abstract: An object is to improve reliability of a semiconductor device. A semiconductor device including a driver circuit portion and a display portion (also referred to as a pixel portion) over the same substrate is provided. The driver circuit portion and the display portion include thin film transistors in which a semiconductor layer includes an oxide semiconductor; a first wiring; and a second wiring. The thin film transistors each include a source electrode layer and a drain electrode layer. In the thin film transistor in the driver circuit portion, the semiconductor layer is sandwiched between a gate electrode layer and a conductive layer. The first wiring and the second wiring are electrically connected to each other in an opening provided in a gate insulating film through an oxide conductive layer.
    Type: Application
    Filed: August 2, 2010
    Publication date: February 10, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Junichiro SAKATA, Masayuki SAKAKURA, Yoshiaki OIKAWA, Kenichi OKAZAKI, Hotaka MARUYAMA, Masashi TSUBUKU
  • Publication number: 20110031465
    Abstract: A resistance variable element of the present invention comprises a first electrode (103), a second electrode (107), and a resistance variable layer which is interposed between the first electrode (103) and the second electrode (107) to contact the first electrode (103) and the second electrode (107), the resistance variable layer being configured to change in response to electric signals with different polarities which are applied between the first electrode (103) and the second electrode (107), the resistance variable layer comprising an oxygen-deficient transition metal oxide layer, and the second electrode (107) comprising platinum having minute hillocks (108).
    Type: Application
    Filed: July 22, 2009
    Publication date: February 10, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Satoru Mitani, Shunsaku Muraoka, Yoshihiko Kanzawa, Koji Katayama, Ryoko Miyanaga, Satoru Fujii, Takeshi Takaji
  • Publication number: 20110024750
    Abstract: An object is to provide a semiconductor device having a structure with which parasitic capacitance between wirings can be sufficiently reduced. An oxide insulating layer serving as a channel protective layer is formed over part of an oxide semiconductor layer overlapping with a gate electrode layer. In the same step as formation of the oxide insulating layer, an oxide insulating layer covering a peripheral portion of the oxide semiconductor layer is formed. The oxide insulating layer which covers the peripheral portion of the oxide semiconductor layer is provided to increase the distance between the gate electrode layer and a wiring layer formed above or in the periphery of the gate electrode layer, whereby parasitic capacitance is reduced.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Hiroki OHARA, Toshinari SASAKI, Kosei NODA, Hideaki KUWABARA
  • Patent number: 7875494
    Abstract: It is an object of the present invention to form an organic transistor including an organic semiconductor having high crystallinity without loosing an interface between an organic semiconductor of a channel where carriers are spread out and a gate insulating layer and deteriorating a yield. A semiconductor device according to the present invention has a stacked structure of organic semiconductor layers, and at least the upper organic semiconductor layer is in a polycrystalline or a single crystalline state and the lower organic semiconductor layer is made of a material serving as a channel. Carrier mobility can be increased owing to the upper organic semiconductor layer having high crystallinity; thus, insufficient contact due to the upper organic semiconductor layer can be compensated by the lower organic semiconductor layer.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: January 25, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shinobu Furukawa, Ryota Imahayashi
  • Publication number: 20110012112
    Abstract: An aperture ratio of a semiconductor device is improved. A driver circuit and a pixel are provided over one substrate, and a first thin film transistor in the driver circuit and a second thin film transistor in the pixel each include a gate electrode layer, a gate insulating layer over the gate electrode layer, an oxide semiconductor layer over the gate insulating layer, source and drain electrode layers over the oxide semiconductor layer, and an oxide insulating layer in contact with part of the oxide semiconductor layer over the gate insulating layer, the oxide semiconductor layer, and the source and drain electrode layers. The gate electrode layer, the gate insulating layer, the oxide semiconductor layer, the source and drain electrode layers, and the oxide insulating layer of the second thin film transistor each have a light-transmitting property.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 20, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Shunpei YAMAZAKI, Junichiro SAKATA, Hiroyuki MIYAKE, Hideaki KUWABARA, Tatsuya TAKAHASHI
  • Patent number: 7863609
    Abstract: A compound semiconductor substrate 10 according to the present invention is comprised of a Group III nitride and has a surface layer 12 containing a chloride of not less than 200×1010 atoms/cm2 and not more than 12000×1010 atoms/cm2 in terms of Cl and an oxide of not less than 3.0 at % and not more than 15.0 at % in terms of O, at a surface. The inventors conducted elaborate research and newly discovered that when the surface layer 12 at the surface of the compound semiconductor substrate 10 contained the chloride of not less than 200×1010 atoms/cm2 and not more than 12000×1010 atoms/cm2 in terms of Cl and the oxide of not less than 3.0 at % and not more than 15.0 at % in terms of O, Si was reduced at an interface between the compound semiconductor substrate 10 and an epitaxial layer 14 formed thereon and, as a result, the electric resistance at the interface was reduced.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: January 4, 2011
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Keiji Ishibashi, Fumitake Nakanishi
  • Publication number: 20100301328
    Abstract: Homogeneity and stability of electric characteristics of a thin film transistor included in a circuit are critical for the performance of a display device including said circuit. An object of the invention is to provide an oxide semiconductor film with low hydrogen content and which is used in an inverted staggered thin film transistor having well defined electric characteristics. In order to achieve the object, a gate insulating film, an oxide semiconductor layer, and a channel protective film are successively formed with a sputtering method without being exposed to air. The oxide semiconductor layer is formed so as to limit hydrogen contamination, in an atmosphere including a proportion of oxygen. In addition, layers provided over and under a channel formation region of the oxide semiconductor layer are formed using compounds of silicon, oxygen and/or nitrogen.
    Type: Application
    Filed: May 24, 2010
    Publication date: December 2, 2010
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Kengo AKIMOTO
  • Publication number: 20100295038
    Abstract: There is provided a method of manufacturing a top contact field-effect transistor including forming a protection layer on an active layer formed in a semiconductor layer forming process, forming a photoresist film on the protection layer and pattern exposing the same in an exposure process, and developing the photoresist film passing through the exposure process using an alkaline developing liquid to form a resist pattern and removing a region exposed by the resist pattern from the protection layer to etch the protection layer in a subsequent development process; a field-effect transistor, and a method of manufacturing a display device.
    Type: Application
    Filed: May 19, 2010
    Publication date: November 25, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Hiroshi TADA, Naoki KOITO
  • Publication number: 20100289020
    Abstract: A field effect transistor which includes, on a substrate, at least a semiconductor layer, a passivation layer for the semiconductor layer, a source electrode, a drain electrode, a gate insulating film and a gate electrode, the source electrode and the drain electrode being connected through the semiconductor layer, the gate insulating film being present between the gate electrode and the semiconductor layer, the passivation layer being at least on one surface side of the semiconductor layer, and the semiconductor layer including a composite oxide which comprises In (indium), Zn (zinc) and Ga (gallium) in the following atomic ratios (1) to (3): In/(In+Zn)=0.2 to 0.8??(1) In/(In+Ga)=0.59 to 0.99??(2) Zn/(Ga+Zn)=0.29 to 0.99??(3).
    Type: Application
    Filed: December 10, 2008
    Publication date: November 18, 2010
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Koki Yano, Hirokazu Kawashima
  • Publication number: 20100283055
    Abstract: An object of the invention is to provide a TFT substrate and a method for producing a TFT substrate which is capable of drastically reducing the production cost by decreasing the number of steps in the production process and improving production yield. A TFT substrate comprises: a substrate; a first oxide layer formed above the substrate; a second oxide layer formed above the first oxide layer with a channel part interposed therebetween; a gate insulating film formed above the substrate, the first oxide layer and the second oxide layer; a gate electrode and a gate wire formed above the gate insulating film.
    Type: Application
    Filed: November 30, 2006
    Publication date: November 11, 2010
    Inventors: Kazuyoshi Inoue, Koki Yano, Nobuo Tanaka, Tokie Tanaka
  • Publication number: 20100276779
    Abstract: A vertical transient voltage suppressing (TVS) device includes a semiconductor substrate of a first conductivity type where the substrate is heavily doped, an epitaxial layer of the first conductivity type formed on the substrate where the epitaxial layer has a first thickness, and a base region of a second conductivity type formed in the epitaxial layer where the base region is positioned in a middle region of the epitaxial layer. The base region and the epitaxial layer provide a substantially symmetrical vertical doping profile on both sides of the base region. In one embodiment, the base region is formed by high energy implantation. In another embodiment, the base region is formed as a buried layer. The doping concentrations of the epitaxial layer and the base region are selected to configure the TVS device as a punchthrough diode based TVS or an avalanche mode TVS.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 4, 2010
    Applicant: Alpha & Omega Semiconductor, Inc.
    Inventors: Lingpeng Guan, Madhur Bobde, Anup Bhalla
  • Publication number: 20100279462
    Abstract: An amorphous oxide containing hydrogen (or deuterium) is applied to a channel layer of a transistor. Accordingly, a thin film transistor having superior TFT properties can be realized, the superior TFT properties including a small hysteresis, normally OFF operation, a high ON/OFF ratio, a high saturated current, and the like. Furthermore, as a method for manufacturing a channel layer made of an amorphous oxide, film formation is performed in an atmosphere containing a hydrogen gas and an oxygen gas, so that the carrier concentration of the amorphous oxide can be controlled.
    Type: Application
    Filed: July 9, 2010
    Publication date: November 4, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tatsuya Iwasaki
  • Publication number: 20100258795
    Abstract: Disclosed is a method of manufacturing a ZnO-based semiconductor device having at least p-type ZnO-based semiconductor layer, which includes a step of forming a contact metal layer on the p-type ZnO-based semiconductor layer wherein the contact metal layer contains at least one of Ni and Cu; and a step of performing heat treatment of the contact metal layer and the p-type ZnO-based semiconductor layer under an oxygen-free atmosphere to form a mixture layer including elements of the p-type ZnO-based semiconductor layer and the contact metal layer at a boundary region therebetween while maintaining a metal phase layer on a surface of the contact metal layer.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 14, 2010
    Applicant: Stanley Electric Co., Ltd.
    Inventor: Naochika HORIO
  • Publication number: 20100261353
    Abstract: A method for controlling the flatness of a wafer between lithography pattern levels. A first lithography step is performed on a topside semiconductor surface of the wafer. Reference curvature information is obtained for the wafer. The reference curvature is other than planar. At least one process step is performed that results in a changed curvature relative to the reference curvature. The changed curvature information is obtained for the wafer. Stress on a bottomside surface of the wafer is modified that reduces a difference between the changed curvature and the reference curvature. A second lithography step is performed on the topside semiconductor surface while the modified stress distribution is present.
    Type: Application
    Filed: April 9, 2010
    Publication date: October 14, 2010
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Steven L. Prins, Brian K. Kirkpatrick, Amitabh Jain
  • Publication number: 20100255652
    Abstract: According to the invention, a Ti film is formed on a substrate and is annealed at the temperatures of 350° C.-400° C. under oxidative environment, so that a TiO2 film having a rutile crystal structure is formed. Since the TiO2 film having a rutile crystal structure has a high dielectric constant, it is useful for a capacitive insulating film for a capacitor.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 7, 2010
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Masami TANIOKU
  • Publication number: 20100244017
    Abstract: In at least some embodiments, a thin-film transistor (TFT) includes a gate electrode and a gate dielectric adjacent the gate electrode. The TFT also includes a source electrode at least partially aligned with the gate electrode and separated from the gate electrode by the gate dielectric. The TFT also includes a drain electrode laterally offset from the gate electrode by at least 2 ?m and separated from the gate electrode by the gate dielectric. The TFT also includes an extended oxide channel between the source electrode and the drain electrode, wherein a portion of the extended oxide channel is ungated.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 30, 2010
    Inventors: Randy HOFFMAN, James W. STASIAK
  • Publication number: 20100248460
    Abstract: A method of forming an information storage pattern, includes placing a semiconductor substrate in a process chamber, injecting first, second and third process gases into the process chamber during a first process to form a lower layer on the substrate based on a first injection time and/or a first pause time, injecting the second process gas into the process chamber during a second process, wherein the second process gas is injected into the process chamber during a first elimination time, injecting a fourth process gas together with the second and third process gases into the process chamber during a third process in accordance with a second injection time and/or a second pause time to form an upper layer on the lower layer, and injecting the second process gas into the process chamber during a fourth process, wherein the second process gas is injected into the process chamber during a second elimination.
    Type: Application
    Filed: March 26, 2010
    Publication date: September 30, 2010
    Inventors: Jin-Il Lee, Urazaev Vladimir, Jin-Ha Jeong, Seung-Back Shin, Sung-Lae Cho, Hyeong-Geun An, Dong-Hyun Im, Jung-Hyeon Kim
  • Publication number: 20100248422
    Abstract: A method of manufacturing a nonvolatile memory device according to an embodiment of the present invention comprises: forming a metal film containing metal whose oxide functions as a variable resistive material and which reacts with silicon through heat treatment and forms metal silicide, on an interlayer insulating film having a silicon layer, which is patterned in a predetermined shape and connected to a first wire, with the surface thereof exposed, performing heat treatment to form a silicide layer on the surface of the silicon layer, oxidizing the silicide layer to form a variable resistive layer on an upper part of the silicon layer, and forming a second wire coupled to the variable resistive layer.
    Type: Application
    Filed: September 15, 2009
    Publication date: September 30, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Toshiharu TANAKA
  • Patent number: 7803670
    Abstract: A semiconductor process and apparatus provide a dual or hybrid substrate by forming a second semiconductor layer (214) that is isolated from, and crystallographically rotated with respect to, an underlying first semiconductor layer (212) by a buried insulator layer (213); forming an STI region (218) in the second semiconductor layer (214) and buried insulator layer (213); exposing the first semiconductor layer (212) in a first area (219) of a STI region (218); epitaxially growing a first epitaxial semiconductor layer (220) from the exposed first semiconductor layer (212); and selectively etching the first epitaxial semiconductor layer (220) and the second semiconductor layer (214) to form CMOS FinFET channel regions (e.g., 223) and planar channel regions (e.g., 224) from the first epitaxial semiconductor layer (220) and the second semiconductor layer (214).
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: September 28, 2010
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Ted R. White, Leo Mathew, Bich-Yen Nguyen, Zhonghai Shi, Voon-Yew Thean, Mariam G. Sadaka
  • Publication number: 20100233847
    Abstract: 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: Application
    Filed: March 9, 2010
    Publication date: September 16, 2010
    Inventors: Hiroki OHARA, Toshinari SASAKI
  • Publication number: 20100224871
    Abstract: The present application provides a thin film transistor and a method of manufacturing same capable of suppressing diffusion of aluminum to oxide semiconductor and selectively etching oxide semiconductor and aluminum oxide. The thin film transistor includes: a gate electrode; a channel layer whose main component is oxide semiconductor; a gate insulating film provided between the gate electrode and the channel layer; a sealing layer provided on the side opposite to the gate electrode, of the channel layer; and a pair of electrodes which are in contact with the channel layer and serve as a source and a drain. The sealing layer includes at least a first insulating film made of a first insulating material, and a second insulating film made of a second insulting material having etching selectivity to each of the oxide semiconductor and the first insulating material and provided between the first insulating film and the channel layer.
    Type: Application
    Filed: February 22, 2010
    Publication date: September 9, 2010
    Applicant: SONY CORPORATION
    Inventors: Norihiko Yamaguchi, Satoshi Taniguchi, Hiroko Miyashita, Yasuhiro Terai