With Bipolar Transistors Or With Fets Of Only One Channel Conductivity Type (e.g., Enhancement-depletion Fets) Patents (Class 257/205)
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Patent number: 8026572Abstract: A semiconductor device having plural active and passive elements on one semiconductor substrate is manufactured in the following cost effective manner even when the active and passive elements include double sided electrode elements. When the semiconductor substrate is divided into plural field areas, an insulation separation trench that penetrates the semiconductor substrate surrounds each of the field areas, and each of the either of the plural active elements or the plural passive elements. Further, each of the plural elements has a pair of power electrodes for power supply respectively disposed on each of both sides of the semiconductor substrate to serve as the double sided electrode elements.Type: GrantFiled: December 4, 2007Date of Patent: September 27, 2011Assignee: DENSO CORPORATIONInventors: Yoshihiko Ozeki, Kenji Kouno, Tetsuo Fujii
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Patent number: 8017974Abstract: A semiconductor device having the present high withstand voltage power device IGBT has at a back surface a p collector layer with boron injected in an amount of approximately 3×1013/cm2 with an energy of approximately 50 KeV to a depth of approximately 0.5 ?m, and an n+ buffer layer with phosphorus injected in an amount of approximately 3×1012/cm2 with an energy of 120 KeV to a depth of approximately 20 ?m. To control lifetime, a semiconductor substrate is exposed to protons at the back surface. Optimally, it is exposed to protons at a dose of approximately 1×1011/cm2 to a depth of approximately 32 ?m as measured from the back surface. Thus snapback phenomenon can be eliminated and an improved low saturation voltage (Vce (sat))-offset voltage (Eoff) tradeoff can be achieved.Type: GrantFiled: July 17, 2008Date of Patent: September 13, 2011Assignee: Mitsubishi Electric CorporationInventor: Yoshiaki Hisamoto
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Patent number: 7998807Abstract: A method for increasing the speed of a bipolar transistor, includes the following steps: providing a bipolar transistor having emitter, base, and collector regions; providing electrodes for coupling electrical signals with the emitter, base, and collector regions; and adapting the base region to enhance stimulated emission to the detriment of spontaneous emission, so as to reduce carrier recombination lifetime in the base region.Type: GrantFiled: June 4, 2004Date of Patent: August 16, 2011Assignee: The Board of Trustees of The University of IllinoisInventors: Milton Feng, Nick Holonyak, Jr.
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Patent number: 7985987Abstract: A HEMT-type field-effect semiconductor device has a main semiconductor region comprising two layers of dissimilar materials such that a two-dimensional electron gas layer is generated along the heterojunction between the two layers. A source and a drain electrode are placed in spaced positions on a major surface of the main semiconductor region. Between these electrodes, a gate electrode is received in a recess in the major surface of the main semiconductor region via a p-type metal oxide semiconductor film whereby a depletion zone is normally created in the electron gas layer, with a minimum of turn-on resistance and gate leak current.Type: GrantFiled: November 16, 2010Date of Patent: July 26, 2011Assignee: Sanken Electric Co., Ltd.Inventor: Nobuo Kaneko
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Patent number: 7956384Abstract: A semiconductor power device supported on a semiconductor substrate that includes a plurality of transistor cells, each cell has a source and a drain region disposed on opposite sides of a gate region in the semiconductor substrate. A gate electrode is formed as an electrode layer on top of the gate region for controlling an electric current transmitted between the source and the drain regions. The gate electrode layer disposed on top of the semiconductor substrate is patterned into a wave-like shaped stripes for substantially increasing an electric current conduction area between the source and drain regions across the gate.Type: GrantFiled: June 23, 2006Date of Patent: June 7, 2011Assignee: Alpha & Omega Semiconductor Ltd.Inventor: Shekar Mallikararjunaswamy
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Patent number: 7939857Abstract: A composite device includes a depletion mode FET coupled to a bipolar transistor. The FET includes gate, drain and source terminals, and the bipolar transistor includes base, collector and emitter terminals. The collector terminal of the bipolar transistor and the source terminal of the depletion mode FET are directly connected to each other. Additionally, the emitter terminal of the bipolar transistor and the gate terminal of the depletion mode FET are directly connected to each other. The voltage between the collector and emitter terminals, VCE, is configured to bias the depletion mode FET. The VCE voltage has a value that is equal and opposite to a voltage VGS between the gate and source terminals of the depletion mode FET.Type: GrantFiled: August 24, 2009Date of Patent: May 10, 2011Assignee: ITT Manufacturing Enterprises, Inc.Inventor: Michael A Wyatt
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Patent number: 7898006Abstract: An integrated circuit having memory cells and a method of manufacture is disclosed. One embodiment provides a switching active volume and a selection transistor coupled in series between a first electrode and a second electrode. The selection transistor is a vertical transistor for at least partially guiding a substantially vertical current flow. The second electrode includes a buried diffused ground plate formed in a substrate. A metal-containing region at least partially contacting the buried diffused ground plate is provided, the metal-containing region at least extending below the selection transistor.Type: GrantFiled: November 15, 2007Date of Patent: March 1, 2011Assignee: Qimonda AGInventor: Ulrike Gruening-von Schwerin
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Patent number: 7859021Abstract: A HEMT-type field-effect semiconductor device has a main semiconductor region comprising two layers of dissimilar materials such that a two-dimensional electron gas layer is generated along the heterojunction between the two layers. A source and a drain electrode are placed in spaced positions on a major surface of the main semiconductor region. Between these electrodes, a gate electrode is received in a recess in the major surface of the main semiconductor region via a p-type metal oxide semiconductor film whereby a depletion zone is normally created in the electron gas layer, with a minimum of turn-on resistance and gate leak current.Type: GrantFiled: August 27, 2008Date of Patent: December 28, 2010Assignee: Sanken Electric Co., Ltd.Inventor: Nobuo Kaneko
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Patent number: 7838909Abstract: A semiconductor device includes a common diffusion structure formed in each region of a substrate in which semiconductor components are formed. The diffusion structures are separated into sections by trenches to form semiconductor components. The trenches define sizes of the semiconductor components and isolate the semiconductor components from the surrounding area.Type: GrantFiled: September 28, 2006Date of Patent: November 23, 2010Assignee: Denso CorporationInventors: Hiroaki Himi, Takashi Nakano, Shoji Mizuno
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Patent number: 7829957Abstract: A semiconductor device which includes both an E-FET and a D-FET and can facilitate control of the Vth in an E-FET and suppress a decrease in the Vf, and a manufacturing method of the same are provided. A semiconductor device which includes both an E-FET and a D-FET on the same semiconductor substrate includes: a first threshold adjustment layer for adjusting threshold of the E-FET; a first etching stopper layer formed on the first threshold adjustment layer; the second threshold adjustment layer formed on the first etching stopper layer for adjusting threshold of the D-FET; a second etching stopper layer formed on the second threshold adjustment layer; a first gate electrode penetrating through the first etching stopper layer, the second threshold adjustment layer, and the second etching stopper layer, which is in contact with the first threshold adjustment layer; and the second gate electrode penetrating through the second etching stopper layer, which is in contact with the second threshold adjustment layer.Type: GrantFiled: March 25, 2008Date of Patent: November 9, 2010Assignee: Panasonic CorporationInventors: Yoshiaki Kato, Yoshiharu Anda, Akihiko Nishio
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Patent number: 7772060Abstract: A method of fabricating an integrated BiCMOS circuit is provided, the circuit including bipolar transistors 10 and CMOS transistors 12 on a substrate. The method comprises the step of forming an epitaxial layer 28 to form a channel region of a MOS transistor and a base region of a bipolar transistor. Growing of the epitaxial layer includes growing a first sublayer of silicon 28a, a first sublayer of silicon-germanium 28b onto the first sublayer of silicon, a second sublayer of silicon 28c onto the first sublayer of silicon-germanium, and a second sublayer of silicon-germanium 28d onto the second sublayer of silicon. Furthermore, an integrated BiCMOS circuit is provided, which includes an epitaxial layer 28 as described above.Type: GrantFiled: June 11, 2007Date of Patent: August 10, 2010Assignee: Texas Instruments Deutschland GmbHInventors: Reiner Jumpertz, Klaus Schimpf
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Patent number: 7723804Abstract: A semiconductor device includes a semiconductor layer, and a first transistor and a second transistor that are formed using the semiconductor layer, wherein each conductance of the first and second transistors changes complementarily to each other according to a curvature of the semiconductor layer.Type: GrantFiled: August 17, 2006Date of Patent: May 25, 2010Assignee: Seiko Epson CorporationInventor: Yoshiharu Ajiki
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Publication number: 20100117082Abstract: A semiconductor device capable of compensating for an electrical characteristic variation of a transistor array is provided. The semiconductor device includes an N-well region and a transistor array spaced from the N-well region and including a plurality of transistors. A characteristic of each of the transistors is adjusted to enable the transistors to have a same electrical characteristic.Type: ApplicationFiled: November 12, 2009Publication date: May 13, 2010Inventors: DAE WOOK KIM, Ji-Seong Doh, Sang Hoon Lee, Ji Suk Hong
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Patent number: 7696536Abstract: A method for enhancing operation of a bipolar light-emitting transistor includes the following steps: providing a bipolar light-emitting transistor having emitter, base, and collector regions; providing electrodes for coupling electrical signals with the emitter, base, and collector regions; and adapting the base region to promote carrier transport from the emitter region toward the collector region by providing, in the base region, several spaced apart quantum size regions of different thicknesses, with the thicknesses of the quantum size regions being graded from thickest near the collector to thinnest near the emitter.Type: GrantFiled: July 31, 2006Date of Patent: April 13, 2010Assignee: The Board of Trustees of The University of IllinoisInventors: Milton Feng, Nick Holonyak, Jr.
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Patent number: 7692214Abstract: A semiconductor device includes: a semiconductor substrate; an IGBT cell; and a diode cell. The substrate includes a first layer on a first surface, second and third layers adjacently arranged on a second surface of the substrate and a fourth layer between the first layer and the second and third layers. The first layer provides a drift layer of the IGBT cell and the diode cell. The second layer provides a collector layer of the IGBT cell. The third layer provides one electrode connection layer of the diode cell. A resistivity ?1 and a thickness L1 of the first layer, a resistivity ?2 and a thickness L2 of the fourth layer, and a half of a minimum width W2 of the second layer on a substrate plane have a relationship of (?1/?2)×(L1·L2/W22)<1.6.Type: GrantFiled: March 20, 2007Date of Patent: April 6, 2010Assignee: DENSO CORPORATIONInventors: Norihito Tokura, Yukio Tsuzuki, Kenji Kouno
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Publication number: 20100032720Abstract: A technology which allows a reduction in the thermal resistance of a semiconductor device and the miniaturization thereof is provided. The semiconductor device has a plurality of unit transistors Q, transistor formation regions 3a, 3b, and 3e each having a first number (e.g., seven) of the unit transistors Q, and transistor formation regions 3c and 3d each having a second number (e.g., four) of the unit transistors Q. The transistor formation regions 3c and 3d are located between the transistor formation regions 3a, 3b, 3e, and 3f, and the first number is larger than the second number.Type: ApplicationFiled: October 15, 2009Publication date: February 11, 2010Inventors: Satoshi SASAKI, Yasunari Umemoto, Yasuo Osone, Tsutomu Kobori, Chushiro Kusano, Isao Ohbu, Kenji Sasaki
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Patent number: 7633098Abstract: This disclosure relates to field-effect-transistor (FET) multiplexing/demultiplexing architectures and methods for fabricating them. One of these FET multiplexing/demultiplexing architectures enables decoding of an array of tightly pitched conductive structures. Another enables efficient decoding of various types of conductive-structure arrays, tightly pitched or otherwise. Also, processes for forming FET multiplexing/demultiplexing architectures are disclosed that use alignment-independent processing steps. One of these processes uses one, low-accuracy imprinting step and further alignment-independent processing steps.Type: GrantFiled: June 19, 2007Date of Patent: December 15, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xiaofeng Yang, Pavel Komilovich
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Patent number: 7622756Abstract: A technology which allows a reduction in the thermal resistance of a semiconductor device and the miniaturization thereof is provided. The semiconductor device has a plurality of unit transistors Q, transistor formation regions 3a, 3b, and 3e each having a first number (seven) of the unit transistors Q, and transistor formation regions 3c and 3d each having a second number (four) of the unit transistors Q. The transistor formation regions 3c and 3d are located between the transistor formation regions 3a, 3b, 3e, and 3f and the first number is larger than the second number.Type: GrantFiled: December 28, 2005Date of Patent: November 24, 2009Assignee: Renesas Technology Corp.Inventors: Satoshi Sasaki, Yasunari Umemoto, Yasuo Osone, Tsutomu Kobori, Chushiro Kusano, Isao Ohbu, Kenji Sasaki
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Patent number: 7598541Abstract: A semiconductor device has transistors (P1,P10,P11) formed in an active region (22) isolated by a trench isolation region, and a predetermined circuit including a first and second transistors (P10,P11) that require symmetry or relativity characteristics, wherein the distances (S1) between a gate electrode and one end of the active region on a source side viewed from the gate electrode in the first and second transistor are substantially same, and the distances (D1) between a gate electrode and one end of the active region on a drain side viewed from the gate electrode in the first and second transistor are substantially same. The predetermined circuit includes, for example, a current mirror circuit that has a transistor pair of which gate is commonly connected, and a differential circuit that has a transistor pair whose sources are commonly connected, where an input signal is supplied to the gate, and an output signal is generated in the drain.Type: GrantFiled: August 18, 2004Date of Patent: October 6, 2009Assignee: Fujitsu Microelectronics LimitedInventors: Atsushi Okamoto, Toshiharu Takaramoto
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Patent number: 7592710Abstract: A bond pad structure of an integrated circuit is provided. The bond pad structure includes a conductive bond pad, a first dielectric layer underlying the bond pad, and an Mtop plate located in the first dielectric layer and underlying the bond pad. The Mtop plate is a solid conductive plate and is electrically coupled to the bond pad. The bond pad structure further includes a first passivation layer over the first dielectric layer wherein the first passivation layer has at least a portion under a middle portion of the bond pad. At least part of an active circuit is located under the bond pad.Type: GrantFiled: April 21, 2006Date of Patent: September 22, 2009Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Chin-Chiu Hsia, Chih-Hsiang Yao, Tai-Chun Huang, Chih-Tang Peng
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Publication number: 20090127586Abstract: An integrated circuit having memory cells and a method of manufacture is disclosed. One embodiment provides a switching active volume and a selection transistor coupled in series between a first electrode and a second electrode. The selection transistor is a vertical transistor for at least partially guiding a substantially vertical current flow. The second electrode includes a buried diffused ground plate formed in a substrate. A metal-containing region at least partially contacting the buried diffused ground plate is provided, the metal-containing region at least extending below the selection transistor.Type: ApplicationFiled: November 15, 2007Publication date: May 21, 2009Applicant: QIMONDA AGInventor: Ulrike Gruening-von Schwerin
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Patent number: 7521735Abstract: A semiconductor on insulator substrate and a method of fabricating the substrate. The substrate including: a first crystalline semiconductor layer and a second crystalline semiconductor layer; and an insulating layer bonding a bottom surface of the first crystalline semiconductor layer to a top surface of the second crystalline semiconductor layer, a first crystal direction of the first crystalline semiconductor layer aligned relative to a second crystal direction of the second crystalline semiconductor layer, the first crystal direction different from the second crystal direction.Type: GrantFiled: January 4, 2008Date of Patent: April 21, 2009Assignee: International Business Machines CorporationInventors: Toshiharu Furukawa, David V. Horak, Charles W. Koburger, III, Leathen Shi
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Patent number: 7482642Abstract: A bipolar transistor which has a base formed of a combination of shallow and deep acceptors species. Specifically, elements such as Indium, Tellurium, and Gallium are deep acceptors in silicon, and are appropriate for such an application, in combination with boron as the shallow acceptor. The use of a deep acceptor for doping the base of the transistor has the benefit of providing a doping species, which increases in ionization as the temperature rises. At elevated temperatures, the fraction of, for example, indium which is ionized increases and it results in an increased Gummel number, driving down the current gain. In other words, the enhancement of the Gummel number between room temperature and an elevated temperature compensates for the increase in the ratio of collector and base currents due to band gap narrowing effects. Thus, a zero temperature coefficient bipolar transistor is provided.Type: GrantFiled: March 11, 2005Date of Patent: January 27, 2009Assignee: LSI CorporationInventor: Ashok K. Kapoor
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Publication number: 20080277693Abstract: An imager element, device and imaging system image sensor pixel. The image sensor pixel includes a collection region, a floating diffusion region, and a transfer transistor having a recessed gate. The recessed gate is configured to couple the collection region to the floating diffusion region so that collected charge is transferred during activation. The recessed gate has an effective gate length greater than the physical gate length.Type: ApplicationFiled: May 10, 2007Publication date: November 13, 2008Applicant: MICRON TECHNOLOGY, INC.Inventors: Richard A. Mauritzson, Inna Patrick
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Publication number: 20080272398Abstract: A method of forming a conductive spacer on a semiconductor device. The method includes depositing a polysilicon layer on the semiconductor device, selectively implanting dopant ions in the polysilicon layer on a first side of a transistor region of the semiconductor device to define a conductive spacer area, and removing the polysilicon layer except for the conductive spacer area. Optionally, a silicidation process can be performed on the conductive spacer area so that the conductive spacer is made up of metal silicide.Type: ApplicationFiled: August 31, 2007Publication date: November 6, 2008Inventors: Gary Bela Bronner, David Michael Fried, Jeffrey Peter Gambino, Leland Chang, Ramachandra Divakaruni, Haizhou Yin, Gregory Costrini, Viraj Y. Sardesai
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Patent number: 7446418Abstract: The semiconductor device has insulating films 40, 42 formed over a substrate 10; an interconnection 58 buried in at least a surface side of the insulating films 40, 42; insulating films 60, 62 formed on the insulating film 42 and including a hole-shaped via-hole 60 and a groove-shaped via-hole 66a having a pattern bent at a right angle; and buried conductors 70, 72a buried in the hole-shaped via-hole 60 and the groove-shaped via-hole 66a. A groove-shaped via-hole 66a is formed to have a width which is smaller than a width of the hole-shaped via-hole 66. Defective filling of the buried conductor and the cracking of the inter-layer insulating film can be prevented. Steps on the conductor plug can be reduced. Accordingly, defective contact with the upper interconnection layer and the problems taking place in forming films can be prevented.Type: GrantFiled: June 2, 2005Date of Patent: November 4, 2008Assignee: Fujitsu LimitedInventor: Kenichi Watanabe
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Patent number: 7405434Abstract: A nanofluidic channel fabricated in fused silica with an approximately 500 nm square cross section was used to isolate, detect and identify individual quantum dot conjugates. The channel enables the rapid detection of every fluorescent entity in solution. A laser of selected wavelength was used to excite multiple species of quantum dots and organic molecules, and the emission spectra were resolved without significant signal rejection. Quantum dots were then conjugated with organic molecules and detected to demonstrate efficient multicolor detection. PCH was used to analyze coincident detection and to characterize the degree of binding. The use of a small fluidic channel to detect quantum dots as fluorescent labels was shown to be an efficient technique for multiplexed single molecule studies. Detection of single molecule binding events has a variety of applications including high throughput immunoassays.Type: GrantFiled: November 16, 2005Date of Patent: July 29, 2008Assignee: Cornell Research Foundation, Inc.Inventors: Samuel M. Stavis, Joshua B. Edel, Kevan T. Samiee, Harold G. Craighead
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Patent number: 7402846Abstract: An electrostatic discharge (ESD) protection structure is disclosed. The ESD protection structure includes an active device. The active device includes a plurality of drains. Each of the drains has a contact row and at least one body contact row. The at least one body contact row is located on the active device in a manner to reduce the amount of voltage required for triggering the ESD protection structure.Type: GrantFiled: October 20, 2005Date of Patent: July 22, 2008Assignee: Atmel CorporationInventors: Stefan Schwantes, Michael Graf, Volker Dudek, Gayle W. Miller, Jr., Irwin Rathbun, Peter Grombach, Manfred Klaussner
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Patent number: 7394156Abstract: A semiconductor integrated circuit device has a plurality of CMOS-type base cells arranged on a semiconductor substrate and m wiring layers, and gate array type logic cells are composed of the base cells and the wiring layers. Wiring within and between the logic cells is constituted by using only upper n (n<m) wiring layers. It becomes possible to shorten a development period and reduce a development cost when a gate array type semiconductor integrated circuit device becomes large in scale.Type: GrantFiled: January 25, 2005Date of Patent: July 1, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shinya Tokunaga, Shigeki Furuya, Yuuji Hinatsu
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Patent number: 7372155Abstract: A method of closely interconnecting integrated circuits contained within a semiconductor wafer to electrical circuits surrounding the semiconductor wafer. Electrical interconnects are held to a minimum in length-by making efficient use of polyimide or polymer as an inter-metal dielectric thus enabling the integration of very small integrated circuits within a larger circuit environment at a minimum cost in electrical circuit performance.Type: GrantFiled: May 18, 2005Date of Patent: May 13, 2008Inventor: Mou-Shiung Lin
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Publication number: 20080079025Abstract: An exposure device includes a circuit board, a light-emitting element member, a driving signal generating unit and a first voltage supply unit. The light-emitting element member is disposed on the circuit board. The light-emitting element includes plural light-emitting elements arranged in a line and plural switching elements disposed so as to correspond to the plural light-emitting elements. When the plural switching elements sequentially set the respective light-emitting elements to be in a state where the respective light-emitting elements can turn on, the respective light-emitting elements turn on sequentially. The driving signal generating unit is disposed on the circuit board. The driving signal generating unit generates driving signals for driving the respective light-emitting elements arranged in the light-emitting element member. The first voltage supply unit is disposed on the circuit board. The voltage supply unit supplies a first predetermined voltage to the light-emitting element member.Type: ApplicationFiled: April 16, 2007Publication date: April 3, 2008Inventor: Michihiro Inoue
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Patent number: 7348610Abstract: A semiconductor on insulator substrate and a method of fabricating the substrate. The substrate including: a first crystalline semiconductor layer and a second crystalline semiconductor layer; and an insulating layer bonding a bottom surface of the first crystalline semiconductor layer to a top surface of the second crystalline semiconductor layer, a first crystal direction of the first crystalline semiconductor layer aligned relative to a second crystal direction of the second crystalline semiconductor layer, the first crystal direction different from the second crystal direction.Type: GrantFiled: February 24, 2005Date of Patent: March 25, 2008Assignee: International Business Machines CorporationInventors: Toshiharu Furukawa, David V. Horak, Charles W. Koburger, III, Leathen Shi, III
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Patent number: 7321139Abstract: A layout for a transistor in a standard cell is disclosed. The layout for a transistor includes an active region with at least one portion having a first edge and at least one portion having a second edge all perpendicular to a channel of the transistor; and a gate placed on top of the active region with a distance from an edge of the gate to the first edge being shorter than a distance from the edge of the gate to the second edge of the active region, wherein the active region is of a non-rectangular shape.Type: GrantFiled: May 26, 2006Date of Patent: January 22, 2008Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Mi-Chang Chang, Liang-Kai Han, Huan-Tsung Huang, Wen-Jya Liang, Li-Chun Tien
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Patent number: 7217966Abstract: A transistor array is self-protected from an electrostatic discharge (ESD) event which can cause localized ESD damage by integrating an ESD protection device into the transistor array. The ESD protection device operates as a transistor during normal operating conditions, and provides a low-resistance current path during an ESD event.Type: GrantFiled: February 18, 2005Date of Patent: May 15, 2007Assignee: National Semiconductor CorporationInventors: Vladislav Vashchenko, Peter J. Hopper, Philipp Lindorfer
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Patent number: 7215562Abstract: A semiconductor storage device in which a pair of wiring lines extending in a first direction are arranged repeatedly with a predetermined pitch, comprising: a group of pair transistors in which a plurality of pair transistors is arranged according to a repetition unit with a predetermined pattern, the pair transistors composed of a MOS transistor of which a gate is connected to one line of the pair of wiring lines and of another MOS transistor of which a gate is connected to the other line of the pair of wiring lines, wherein the repetition unit of the group of pair transistors includes a plurality of the pair transistors such that two MOS transistors are adjacent to each other in the first direction, and at least one pair of pair transistors such that two MOS transistors are not adjacent to each other and diagonally opposite to each other.Type: GrantFiled: June 3, 2005Date of Patent: May 8, 2007Assignee: Elpida Memory Inc.Inventor: Junichi Sekine
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Patent number: 7161216Abstract: A semiconductor circuit with a depletion-mode transistor is formed with a method that eliminates the need for a separate mask and implant step to set the threshold voltage of the depletion-mode transistor. As a result, the method of the present invention reduces the cost and complexity associated with the fabrication of a semiconductor circuit that includes a depletion-mode transistor.Type: GrantFiled: October 22, 2003Date of Patent: January 9, 2007Assignee: National Semiconductor CorporationInventor: Terry Lines
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Patent number: 7135722Abstract: A semiconductor device is the semiconductor device which includes more than one field effect transistor having a gate electrode to which an electrical interconnect wire is connected and a gate insulation film with a thickness of 6.0 nm or less and which comprises a first transistor group made up of a plurality of field effect transistors that are the same in thickness of gate insulation film, a second transistor group made up of a plurality of field effect transistors that are the same in thickness of gate insulation film with the thickness of gate insulation film being less than the thickness of the gate insulation film of the first transistor group, and a semiconductor substrate on which the first and second transistor groups are mounted together in a mixed manner, wherein an antenna ratio which is a ratio of the area of a wire to the gate area of a gate electrode is such that the maximum value of the second transistor group is greater than the maximum value of the first transistor group.Type: GrantFiled: June 14, 2004Date of Patent: November 14, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Noriaki Matsunaga, Hitomi Yamaguchi
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Patent number: 7115920Abstract: A drive strength tunable FinFET, a method of drive strength tuning a FinFET, a drive strength ratio tuned FinFET circuit and a method of drive strength tuning a FinFET, wherein the FinFET has either at least one perpendicular and at least one angled fin or has at least one double-gated fin and one split-gated fin.Type: GrantFiled: April 12, 2004Date of Patent: October 3, 2006Assignee: International Business Machines CorporationInventors: Kerry Bernstein, Edward J. Nowak, BethAnn Rainey
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Patent number: 7053424Abstract: A semiconductor integrated circuit device has: a semiconductor substrate defining a plurality of rows, each row including areas for a sequence of cells; a plurality of active regions disposed in each of the rows constituting semiconductor elements of associated cells; and a wiring region of stripe shape elongated along a direction of row, defined on the semiconductor substrate outside of the active regions in each row, and including wirings belonging to the associated cells, each wiring region having height in a direction crossing the row direction, the wiring region having locally different height.Type: GrantFiled: October 30, 2003Date of Patent: May 30, 2006Assignee: Yamaha CorporationInventor: Yukichi Ono
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Patent number: 7026690Abstract: The invention includes BIFETRAM devices. Such devices comprise a bipolar transistor in combination with a field effect transistor (FET) in a three-dimensional stacked configuration. The memory devices can be incorporated within semiconductor-on-insulator (SOI) constructions. The base region of the bipolar device can be physically and electrically connected to one of the source/drain regions of the FET to act as a storage node for the memory cell. The semiconductor material of the SOI constructions can comprise Si/Ge, and the active region of the FET can extend into the Si/Ge. The SOI constructions can be formed over any of a number of substrates, including, for example, semiconductive materials, glass, aluminum oxide, silicon dioxide, metals and/or plastics.Type: GrantFiled: February 12, 2003Date of Patent: April 11, 2006Assignee: Micron Technology, Inc.Inventor: Arup Bhattacharyya
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Patent number: 6995432Abstract: A MIS type semiconductor device and a method for fabricating the same characterized in that impurity regions are selectively formed on a semiconductor substrate or semiconductor thin film and are activated by radiating laser beams or a strong light equivalent thereto from above so that the laser beams or the equivalent strong light are radiated onto the impurity regions and on an boundary between the impurity region and an active region adjoining the impurity region.Type: GrantFiled: November 22, 2002Date of Patent: February 7, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yasuhiko Takemura
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Patent number: 6979908Abstract: A described embodiment of the present invention includes an integrated circuit having a plurality of I/O modules. The I/O modules include a bond pad formed on a substrate. The I/O modules also include an electrostatic discharge device formed in the substrate. The electrostatic discharge device is at least partially formed beneath the bond pad. The I/O module also includes an I/O buffer formed in the substrate. The I/O buffer is connected to the bond pad. The I/O buffer provides communication between the bond pad and circuitry formed in the substrate. The circuitry is positioned substantially adjacent to both the electrostatic discharge device and the I/O buffer.Type: GrantFiled: November 28, 2000Date of Patent: December 27, 2005Assignee: Texas Instruments IncorporatedInventor: U-Ming Ko
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Patent number: 6972442Abstract: One embodiment is a method for fabricating the base of a bipolar transistor where the method comprises placing a first wafer in an undoped epi chamber. Next a first undoped base layer is grown over the first wafer. After growing the first undoped base layer, the first wafer is transferred from the undoped epi chamber into a separate doped epi chamber. A first doped base layer is then grown over the first undoped based layer in the doped epi chamber. While the first wafer is being processed in the doped epi chamber, a second wafer can be processed in the undoped epi chamber. Another embodiment is a structure produced by the disclosed method and yet another embodiment comprises a transfer chamber, a transfer arm, a bake chamber, and a separate undoped epi chamber and a doped epi chamber for practicing the disclosed method.Type: GrantFiled: December 7, 2002Date of Patent: December 6, 2005Assignee: Newport Fab, LLCInventor: Klaus F. Schuegraf
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Fully-depleted-collector silicon-on-insulator (SOI) bipolar transistor useful alone or in SOI BiCMOS
Patent number: 6949764Abstract: A bipolar transistor structure is described incorporating an emitter, base, and collector having a fully depleted region on an insulator of a Silicon-On-Insulator (SOI) substrate without the need for a highly doped subcollector to permit the fabrication of vertical bipolar transistors on semiconductor material having a thickness of 300 nm or less and to permit the fabrication of SOI BiCMOS. The invention overcomes the problem of requiring a thick semiconductor layer in SOI to fabricate vertical bipolar transistors with low collector resistance.Type: GrantFiled: November 19, 2004Date of Patent: September 27, 2005Assignee: International Business Machines CorporationInventor: Tak Hung Ning -
Patent number: 6903386Abstract: A transistor includes a means for providing a non-silicon-based emitter with a flexible structure to relieve lattice mis-match between the emitter and the base.Type: GrantFiled: June 14, 2002Date of Patent: June 7, 2005Assignee: Hewlett-Packard Development Company, L.P.Inventors: Hung Liao, Bao-Sung Bruce Yeh
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Patent number: 6881989Abstract: A base cell is configured such that P-type regions 11 to 13 are arrayed in a column direction in an N-type well 10, N-type regions 21 to 23 are arrayed in a column direction in a P-type well 20 next to the N-type well, gate lines 34A and 35B passing above a channel between the P-type regions and further between the N-type regions are formed in a row direction, and well contact regions 16C and 26C are formed in the wells 10 and 20 at outer ends thereof, respectively, while no gate contacts are formed at the outer ends. Power supply lines VDD and VSS connected to the well contact regions are formed in the column direction in a second wiring layer above a first wiring layer.Type: GrantFiled: June 12, 2003Date of Patent: April 19, 2005Assignee: Fujitsu LimitedInventors: Yoshio Kajii, Toru Osajima
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Patent number: 6870184Abstract: A bipolar junction transistor (BJT) requires the fabrication of a BJT structure and of a support post which is adjacent to, but physically and electrically isolated from, the BJT structure. The BJT structure includes a semi-insulating substrate, a subcollector, a collector, a base, and an emitter. Metal contacts are formed on the subcollector and emitter to provide collector and emitter terminals. Contact to the structure's base is accomplished with a metal contact which extends from the top of the support post to the edge of the base nearest the support post. The contact bridges the physical and electrical separation between the support post and the base and provides a base terminal for the device. The base contact need extend over the edge of the base by no more than the transfer length associated with the fabrication process. This results in the smaller base contact area over the collector than would otherwise be necessary, and a consequent reduction in base-collector capacitance.Type: GrantFiled: July 30, 2003Date of Patent: March 22, 2005Assignee: Innovative Technology Licensing, LLCInventors: James Chingwei Li, Richard L. Pierson, Jr., Berinder P. S. Brar, John A. Higgins
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Fully-depleted-collector silicon-on-insulator (SOI) bipolar transistor useful alone or in SOI BiCMOS
Patent number: 6849871Abstract: A bipolar transistor structure is described incorporating an emitter, base, and collector having a fully depleted region on an insulator of a Silicon-On-Insulator (SOI) substrate without the need for a highly doped subcollector to permit the fabrication of vertical bipolar transistors on semiconductor material having a thickness of 300 nm or less and to permit the fabrication of SOI BiCMOS. The invention overcomes the problem of requiring a thick semiconductor layer in SOI to fabricate vertical bipolar transistors with low collector resistance.Type: GrantFiled: January 10, 2001Date of Patent: February 1, 2005Assignee: International Business Machines CorporationInventor: Tak Hung Ning -
Patent number: 6841810Abstract: In one embodiment, a bipolar cell (31) includes a cell boundary (32) that defines a cell active area (33), a first array of bipolar transistors (41) is formed within the cell active area (33) and configured for a first function. The bipolar transistors (42) within the first array (41) are parallel to each other. The bipolar cell (31) further includes a second array of bipolar transistors (61) formed within the cell active area (33) and configured for a second function that is different than the first function. The bipolar transistors (62) within the second array (61) are parallel to each other and oriented in a different direction than the transistors (42) in the first array (41).Type: GrantFiled: August 8, 2003Date of Patent: January 11, 2005Assignee: Semiconductor Components Industries, L.L.C.Inventors: Philip Alan Jeffery, Kevin Joseph Jurek, Michael S. Lay, Timothy E. Seneff
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Patent number: 6838709Abstract: A bipolar transistor includes the first group of transistors 610a, the second group of transistors 610b, the third group of transistors 610c and the fourth group of transistors 610d. The groups of transistors have unit transistors with emitters, bases and collectors that are connected electrically in parallel and the number of unit transistors is different from group to group and 2, 4, 8, and 16, respectively.Type: GrantFiled: October 9, 2003Date of Patent: January 4, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shinichi Sonetaka, Yasuyuki Toyoda, Kazuhiro Arai, Yorito Ota