Field-effect Transistor (epo) Patents (Class 257/E21.051)
  • Patent number: 7439117
    Abstract: A method is described for designing a micro electromechanical device in which the risk of self-actuation of the device in use is reduced. The method includes locating a first conductor in a plane and locating a second conductor with its collapsible portion at a predetermined distance above the plane. The method also includes laterally offsetting the first conductor by a predetermined distance from a region of maximum actuation liability. The region of maximum actuation liability is where an attraction force to be applied to activate the device is at a minimum.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: October 21, 2008
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Hendrikus Tilmans, Xavier Rottenberg
  • Patent number: 7410878
    Abstract: A method of forming a polysilicon film having smooth surface using a lateral growth and a step-and-repeat laser process. Amorphous silicon formed in a first irradiation region of a substrate is crystallized to form a first polysilicon region by a first laser shot. Then, the substrate is moved a predetermined distance, and irradiated by a second laser shot. The polysilicon region is then recrystallized and locally planarized by subsequent laser shots. After multiple repetitions of the irradiation procedure, the amorphous silicon film formed on a substrate is completely transformed into a polysilicon film. The polysilicon film includes lateral growth crystal grains and nano-trenches formed in parallel on the surface of the polysilicon film. A longitudinal direction of the nano-trenches is substantially perpendicular to a lateral growth direction of the crystal grains.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: August 12, 2008
    Assignee: AU Optronics Corp.
    Inventors: Chih-Wei Gordon Chao, Ming-Wei Sun
  • Patent number: 7405464
    Abstract: An array substrate includes a base substrate, a switching element, and a pixel electrode. The switching element is on the base substrate. The switching element includes a poly silicon pattern having at least one block. Grains are formed in each of the at least one block that are extended in a plurality of directions. The pixel electrode is electrically connected to the switching element. Therefore, current mobility and design margin of the switching element are improved.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: July 29, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soong-Yong Joo, Myung-Koo Kang
  • Patent number: 7399666
    Abstract: The use of atomic layer deposition (ALD) to form a dielectric layer of zirconium nitride (Zr3N4) and zirconium oxide (ZrO2) and a method of fabricating such a dielectric layer produces a reliable structure for use in a variety of electronic devices. Forming the dielectric structure includes depositing zirconium oxide using atomic layer deposition using precursor chemicals, followed by depositing zirconium nitride using precursor chemicals, and repeating. Alternatively, the zirconium nitride may be deposited first followed by the zirconium nitride, thus providing a different work function. Such a dielectric may be used as the gate insulator of a MOSFET, a capacitor dielectric, or a tunnel gate insulator in memories, because the high dielectric constant (high-k) of the film provides the functionality of a thinner silicon dioxide film, and because of the reduced leakage current of the physically thicker dielectric layer when compared to an electrically equivalent thickness of silicon dioxide.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: July 15, 2008
    Assignee: Micron Technology, Inc.
    Inventors: Kie Y. Ahn, Leonard Forbes
  • Publication number: 20080157061
    Abstract: A field effect transistor array comprising a substrate and a plurality of single wall carbon nano-tubes disposed on a surface of the substrate. A plurality of electrodes are disposed over the nano-tubes such that the conductive strips are spaced-apart from each other. These electrodes form the contact point for the drain and source of the field effect transistor, while one or more of the nano-carbon tubes form the channel between the source and the drain.
    Type: Application
    Filed: April 23, 2007
    Publication date: July 3, 2008
    Inventors: Shashi P. Karna, Govind Mallick
  • Patent number: 7393728
    Abstract: A method of manufacturing an array substrate of a transflective liquid crystal display is provided. Utilizing backward exposure and half-tone photo-mask to reduce the number of photo-masks used in the manufacturing process, only three to four photo-masks are used to manufacture a transflective liquid crystal display.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: July 1, 2008
    Assignee: Au Optronics Corporation
    Inventor: Shih-Chieh Lin
  • Publication number: 20080121933
    Abstract: Methods of manufacturing a semiconductor device and resulting products. The semiconductor device includes a semiconductor substrate, a hetero semiconductor region hetero-adjoined with the semiconductor substrate, a gate insulation layer contacting the semiconductor substrate and a heterojunction of the hetero semiconductor region, a gate electrode formed on the gate insulation layer, an electric field alleviation region spaced apart from a heterojunction driving end of the heterojunction that contacts the gate insulation layer by a predetermined distance and contacting the semiconductor substrate and the gate insulation layer, a source electrode contacting the hetero semiconductor region and a drain electrode contacting the semiconductor substrate. A mask layer is formed on the hetero semiconductor region, and the electric field alleviation region and the heterojunction driving end are formed by using at least a portion of the first mask layer.
    Type: Application
    Filed: October 11, 2007
    Publication date: May 29, 2008
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tetsuya Hayashi, Masakatsu Hoshi, Hideaki Tanaka, Shigeharu Yamagami
  • Patent number: 7368370
    Abstract: Disclosed herein are methods of self-assembling nanoparticles on specific sites of a substrate. The method generally includes introducing a p-type dopant species to at least a portion of an n-type substrate or introducing an n-type dopant species to at least a portion of a p-type substrate, wherein the dopant species creates a surface charge opposite in polarity to that of the substrate surface prior to the introducing; contacting the nanoparticles with the surface of the substrate; and self-assembling a layer of the nanoparticles on p-type regions of the substrate. The methods described herein may be used in the formation of sub-22 nanometer channels, which find use in field-effect transistors, electronic chips, nanoscale biosensors, photonic band gap devices, lasers in optoelectronics and photonics chips, as well as nano-electro-mechanical devices (NEMS).
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: May 6, 2008
    Assignee: The University of Connecticut
    Inventors: Faquir C. Jain, Fotios Papadimitrakopoulos
  • Patent number: 7368776
    Abstract: A semiconductor device, having a memory cell region and a peripheral circuit region, includes an insulating film, having an upper surface, formed on a major surface of a semiconductor substrate to extend from the memory cell region to the peripheral circuit region. A capacitor lower electrode assembly is formed in the memory cell region to upwardly extend to substantially the same height as the upper surface of the insulating film on the major surface of the semiconductor substrate. Additionally, the lower electrode assembly includes first and second lower electrodes that are adjacent through the insulating film. A capacitor upper electrode is formed on the capacitor lower electrode through a dielectric film, to extend onto the upper surface of the insulating film. The capacitor lower electrode includes a capacitor lower electrode part having a top surface and a bottom surface.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: May 6, 2008
    Assignee: Renesas Technology Corp.
    Inventors: Yoshinori Tanaka, Masahiro Shimizu, Hideaki Arima
  • Patent number: 7361539
    Abstract: A semiconductor device structure is provided which includes a first field effect transistor (“FET”) having a first channel region, a first source region, a first drain region and a first gate conductor overlying the first channel region. A second FET is included which has a second channel region, a second source region, a second drain region and a second gate conductor overlying the second channel region. The first and second gate conductors are portions of a single elongated conductive member extending over both the first and second channel regions. A first stressed film overlies the first FET, the first stressed film applying a stress having a first value to the first channel region. A second stressed film overlies the second FET, the second stressed film applying a stress having a second value to the second channel region. The second value is substantially different from the first value.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: April 22, 2008
    Assignee: International Business Machines Corporation
    Inventors: Xiangdong Chen, Haining S. Yang
  • Patent number: 7358127
    Abstract: Impurity concentration (Nd(X)) in an n-drift layer in a diode is at a maximum at a position at a distance Xp from an anode electrode in a direction from the anode electrode to a cathode electrode, and gradually decreases from the position toward each of the anode electrode and the cathode electrode. A ratio of the peak impurity concentration Np to an averaged impurity concentration Ndm in the n-drift layer is in the range of 1 to 5. This provides a diode and a manufacturing method thereof by which oscillations in voltage and current at reverse recovery are inhibited to achieve enhancement both in high speed and low-loss characteristics and in soft recovery characteristics.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: April 15, 2008
    Assignee: Fuji Electric Holdings Co., Ltd.
    Inventor: Michio Nemoto
  • Publication number: 20080073646
    Abstract: An electrically conducting p-channel diamond lattice field effect transistor (DLFET) composed of nanocrystalline diamond having at least about 1020 atoms/cm3 of boron in conduction channel is disclosed, along with methods of making the same. The nanocrystalline diamond may be characterized by having an average grain size diameter of less than 1 ?m, and in particular, grain sizes on the order of 10 to 20 nm, for improved performance of the DLFET.
    Type: Application
    Filed: August 13, 2007
    Publication date: March 27, 2008
    Applicant: AKHAN TECHNOLOGIES,INC.
    Inventor: Adam Khan
  • Patent number: 7348229
    Abstract: The invention relates to a method of manufacturing a semiconductor device (10) with a field effect transistor, in which method a semiconductor body (1) of silicon is provided at a surface thereof with a source region (2) and a drain region (3) of a first conductivity type, which both are provided with extensions (2A,3A) and with a channel region (4) of a second conductivity type, opposite to the first conductivity type, between the source region (2) and the drain region (3) and with a gate region (5) separated from the surface of the semiconductor body (1) by a gate dielectric (6) above the channel region (4), and wherein a pocket region (7) of the second conductivity type and with a doping concentration higher than the doping concentration of the channel region (4) is formed below the extensions (2A,3A), and wherein the pocket region (7) is formed by implanting heavy ions in the semiconductor body (1), after which implantation a first annealing process is done at a moderate temperature and a second annealing
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: March 25, 2008
    Assignee: NXP B.V.
    Inventors: Bartlomiej Jan Pawlak, Raymond James Duffy
  • Publication number: 20080042129
    Abstract: An organic TFT comprising an organic thin film, a gate electrode formed on one surface of the organic thin film through a gate insulating film, source/drain electrodes formed on both sides of the gate electrode and on one surface of the organic thin film or on the other surface, and a film of an organic silane compound positioned between the organic thin film and the gate insulating film and/or between the organic thin film and the source/drain electrodes.
    Type: Application
    Filed: December 21, 2005
    Publication date: February 21, 2008
    Inventors: Masatoshi Nakagawa, Hiroyuki Hanato, Toshihiro Tamura
  • Publication number: 20080035919
    Abstract: Disclosed is a thin film transistor array panel including a substrate, a data line formed on the substrate, a gate line that intersects the data line and includes a gate electrode, a source electrode connected to the data line, and a drain electrode facing the source electrode. An organic semiconductor contacts the source electrode and the drain electrode via an insulating layer having an opening that defines the location of the organic semiconductor. The insulating layer includes an acrylic photosensitive resin having a fluorine-containing compound. A method of manufacturing the above-described thin film transistor array panel is disclosed.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 14, 2008
    Inventors: Jung-Han Shin, Keun-Kyu Song, Tae-Young Choi, Young-Min Kim, Joon-Hak Oh, Seung-Hwan Cho
  • Patent number: 7329571
    Abstract: By combining a plurality of stress inducing mechanisms in each of different types of transistors, a significant performance gain may be obtained, thereby providing enhanced flexibility in adjusting product specific characteristics. For this purpose, sidewall spacers with high tensile stress may be commonly formed on PMOS and NMOS transistors, wherein a deleterious effect on the PMOS transistor may be compensated for by a corresponding compressively stressed contact etch stop layer, while the NMOS transistor comprises a contact etch stop layer with tensile stress. Furthermore, the PMOS transistor comprises an embedded strained semiconductor layer for efficiently creating compressive strain in the channel region.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: February 12, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Jan Hoentschel, Andy Wei, Manfred Horstmann, Thorsten Kammler
  • Patent number: 7326598
    Abstract: A method of fabricating polycrystalline silicon according to an embodiment includes forming a semiconductor layer of amorphous silicon on a substrate having a first region and a second region surrounding the first region; forming a plurality of flat align keys in the second region using a first mask; forming a plurality of convex align keys by etching the semiconductor layer in the first region, the plurality of convex align keys having steps against the substrate; and crystallizing the semiconductor layer in the first region by aligning a second mask with respect to the plurality of convex align keys.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: February 5, 2008
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Young-Joo Kim
  • Patent number: 7316945
    Abstract: A method for fabricating a fin FET in a semiconductor device. The method includes sequentially depositing first and second insulation films on a semiconductor substrate, etching the first and second insulation films using a first mask to form a trench, and depositing a first conductor in the trench.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: January 8, 2008
    Assignee: Dongbu Hitek, Co., Ltd.
    Inventor: Jeong-Ho Park
  • Patent number: 7309634
    Abstract: A semiconductor substrate is patterned to form a depression and prominence. A floating gate is formed so as to cover at least both sidewalls of the prominence of the depression and prominence, and is then etched to form a trench for a device isolation self-aligned with the floating gate. Related structures are also described.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: December 18, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Seung-Wan Hong
  • Patent number: 7300827
    Abstract: A method of manufacturing a thin film transistor substrate includes forming a transistor thin layer pattern, forming a protecting layer, forming a photoresist film, forming a pixel electrode and a conductive layer that are separated from each other, stripping a photoresist pattern to remove the conductive layer using a stripping composition and dissolving the conductive layer. The method of manufacturing a thin film transistor substrate is capable of improving an efficiency of manufacturing process of the thin film transistor substrate. In addition, the stripping composition is recycled.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: November 27, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-Sick Park, Shi-Yul Kim, Jong-Hyun Choung, Won-Suk Shin
  • Patent number: 7268027
    Abstract: Disclosed is a method of manufacturing a photoreceiver, including sequentially laminating a buffer layer, a channel layer, a barrier layer, and a cap layer on a substrate; forming a mesa for HEMT and MSM PD by removing the buffer layer, the channel layer, the barrier layer, and the cap layer with the exception of a region corresponding to HEMT and MSM PD; forming a source electrode and a drain electrode of HEMT; removing the cap layer from a region corresponding to a gate electrode of HEMT and a Schottky electrode of MSM PD; forming the gate electrode of HEMT and the Schottky electrode of HEMT on the cap layer-removed region; and removing the cap layer, the barrier layer and the channel layer from a region corresponding to an optical waveguide, to expose the optical waveguide.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: September 11, 2007
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Young Se Kwon, Jung Ho Cha
  • Patent number: 7259110
    Abstract: It is an object of the present invention to improve the surface planarity of a film by uniforming the thickness of an insulating layer. Further, it is another object of the invention to provide a technology for manufacturing an electronic device typified by a high-definition and high-quality display device with high yield at low cost with the use of the insulating layer. In a method for manufacturing a semiconductor device according to the invention, a semiconductor layer is formed; an insulating layer is formed over the semiconductor layer; a wiring layer connected to the semiconductor layer is formed in an opening provided in the insulating layer; and an electrode layer connected to the wiring layer is formed. The insulating layer is formed by spin coating with a composition containing an insulating material, which has a viscosity of from 10 mPa·s to 50 mPa·s.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: August 21, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hideto Ohnuma, Kiyofumi Ogino, Teruyuki Fujii
  • Patent number: 7244991
    Abstract: A semiconductor integrated apparatus, including: an SOI (Silicon On Insulator) substrate which has a support substrate and an embedded insulation film; an NMOSFET, a PMOSFET and an FBC (Floating Body Cell) formed on the SOI substrate separately from each other; a p type of first well diffusion region formed along the embedded insulation film in the support substrate below the NMOSFET; an n type of second well diffusion region formed along the embedded insulation film in the support substrate below the PMOSFET; and a conduction type of third well diffusion region formed along the embedded insulation film in the support substrate below the FBC.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: July 17, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takashi Ohsawa
  • Patent number: 7229884
    Abstract: Integrated circuit field effect transistors are manufactured by forming a pre-active pattern on a surface of a substrate, while refraining from doping the pre-active pattern with phosphorus. The pre-active pattern includes a series of interchannel layers and channel layers stacked alternately upon each other. Source/drain regions are formed on the substrate, at opposite ends of the pre-active pattern. The interchannel layers are then selectively removed, to form tunnels passing through the pre-active pattern, thereby defining an active channel pattern including the tunnels and channels including the channel layers. The channels are doped with phosphorus after selectively removing the interchannel layers. A gate electrode is then formed in the tunnels and surrounding the channels.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: June 12, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jin-Jun Park
  • Patent number: 7214571
    Abstract: An electron transfer device is implemented in a structure which is readily capable of achieving charge transfer cycle frequencies in the range of several hundred MHz or more and which can be formed by conventional semiconductor integrated circuit manufacturing processes. The device includes a substrate having a horizontal extent and a pillar on the substrate extending from the substrate vertically with respect to the horizontal extent of the substrate. The pillar is formed to vibrate laterally with respect to the vertical length of the pillar at a resonant frequency which can be several hundred MHz. Drain and source electrodes extend from the substrate vertically with respect to the horizontal extent of the substrate, and have innermost ends on opposite sides of the pillar. The pillar is free to vibrate laterally back and forth between the innermost ends of the drain and source electrodes to transfer charge between the electrodes.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: May 8, 2007
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Dominik V. Scheible, Robert H. Blick
  • Patent number: 7205186
    Abstract: A system and method for suppressing sub-oxide formation during the manufacturing of semiconductor devices (such as MOSFET transistor) with high-k gate dielectric is disclosed. In one example, the MOSFET transistor includes a gate structure including a high-k gate dielectric and a gate electrode. In this example, the gate structure is covered with a nitride layer that is used to prevent oxygen from entering the structure during processing, yet is sufficiently thin to be effectively transparent to the processing.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: April 17, 2007
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chih-Hao Wang, Shang-Chih Chen
  • Patent number: 7179696
    Abstract: A method (10) of forming a transistor (100) includes treating (12) at least some of a semiconductor substrate (102) with carbon and then forming (18) a gate structure (114) over the semiconductor substrate. A channel region (122) is thereby being defined within the semiconductor substrate (102) below the gate structure (114). Source and drain regions (140, 142) are then formed (26) within the semiconductor substrate (102) on opposing sides of the channel (122) with a phosphorus dopant.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: February 20, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Srinivasan Chakravarthi, Periannan R. Chidambaram
  • Patent number: 7169674
    Abstract: A diffusion barrier (and method for forming the diffusion barrier) for a field-effect transistor having a channel region and a gate electrode, includes an insulating material being disposed over the channel region. The insulating material includes nitrogen (N), and is disposed under the gate electrode. The insulating material can be provided either as a layer or distributed within a gate dielectric material disposed under the gate electrode.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: January 30, 2007
    Assignee: International Business Machines Corporation
    Inventors: Nestor Alexander Bojarczuk, Jr., Kevin Kok Chan, Christopher Peter D'Emic, Evgeni Gousev, Supratik Guha, Paul C. Jamison, Lars-Ake Ragnarsson
  • Patent number: 7163848
    Abstract: OFF current of a TFT is reduced. There is provided a semiconductor device includung: a substrate; a shielding film formed so as to be in contact with the substrate; a planarization insulating film formed on the substrate so as to cover the shielding film; and a semiconductor layer formed so as to be in contact with the planarization insulating film. The semiconductor device is characterized in that the shielding film overlaps the semiconductor layer with the planarization insulating film sandwiched therebetween, and that the planarization insulating film is polished by CMP before the semiconductor layer is formed.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: January 16, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama
  • Publication number: 20060183272
    Abstract: The use of atomic layer deposition (ALD) to form a dielectric layer of zirconium nitride (Zr3N4) and zirconium oxide (ZrO2) and a method of fabricating such a dielectric layer produces a reliable structure for use in a variety of electronic devices. Forming the dielectric structure includes depositing zirconium oxide using atomic layer deposition using precursor chemicals, followed by depositing zirconium nitride using precursor chemicals, and repeating. Alternatively, the zirconium nitride may be deposited first followed by the zirconium nitride, thus providing a different work function. Such a dielectric may be used as the gate insulator of a MOSFET, a capacitor dielectric, or a tunnel gate insulator in memories, because the high dielectric constant (high-k) of the film provides the functionality of a thinner silicon dioxide film, and because of the reduced leakage current of the physically thicker dielectric layer when compared to an electrically equivalent thickness of silicon dioxide.
    Type: Application
    Filed: February 15, 2005
    Publication date: August 17, 2006
    Inventors: Kie Ahn, Leonard Forbes