Bulk Effect Device Making Patents (Class 438/900)
  • Patent number: 9024285
    Abstract: A nanoscale switching device is provided. The device comprises: a first electrode of a nanoscale width; a second electrode of a nanoscale width; an active region disposed between the first and second electrodes, the active region having a non-conducting portion comprising an electronically semiconducting or nominally insulating and a weak ionic conductor switching material capable of carrying a species of dopants and transporting the dopants under an electric field and a source portion that acts as a source or sink for the dopants; and an oxide layer either formed on the first electrode, between the first electrode and the active region or formed on the second electrode, between the second electrode and the active region. A crossbar array comprising a plurality of the nanoscale switching devices is also provided. A process for making at least one nanoscale switching device is further provided.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: May 5, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jianhua Yang, Gilberto Ribeiro, R. Stanley Williams
  • Patent number: 8981328
    Abstract: A resistive random access memory cell formed in an integrated circuit includes first and second resistive random access memory devices, each including an anode and a cathode. The anode of the second resistive random access memory device is connected to the anode of the first resistive random access memory device. A programming transistor has a first source/drain terminal connected to a programming potential node, a second source/drain terminal connected to the anodes of the first and second resistive random access memory devices, and a gate connected to a program-enable node.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: March 17, 2015
    Assignee: Microsemi SoC Corporation
    Inventors: Jonathan Greene, Frank Hawley, John McCollum
  • Patent number: 8952347
    Abstract: A method for forming a resistive memory cell within a memory array includes forming a patterned stopping layer on a first metal layer formed on a substrate and forming a bottom electrode into features of the patterned stopping layer. The method further includes forming a resistive memory layer. The resistive memory layer includes a metal oxide layer and a top electrode layer. The method further includes patterning the resistive memory layer so that the top electrode layer acts as a bit line within the memory array and a top electrode of the resistive memory cell.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: February 10, 2015
    Assignee: Taiwan Semiconductor Manfacturing Company, Ltd.
    Inventors: Chih-Yang Chang, Wen-Ting Chu, Kuo-Chi Tu, Hsia-Wei Chen, Yu-Wen Liao, Chin-Chieh Yang
  • Patent number: 8927328
    Abstract: A 3D semiconductor device and a method of manufacturing the same are provided. The method includes forming a first semiconductor layer including a common source node on a semiconductor substrate, forming a transistor region on the first semiconductor layer, wherein the transistor region includes a horizontal channel region substantially parallel to a surface of the semiconductor substrate, and source and drain regions branched from the horizontal channel region to a direction substantially perpendicular to the surface of the semiconductor substrate, processing the first semiconductor layer to locate the common source node corresponding to the source region, forming a gate in a space between the source region and the drain region, forming heating electrodes on the source region and the drain region, and forming resistance variable material layers on the exposed heating electrodes.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: January 6, 2015
    Assignee: SK Hynix Inc.
    Inventor: Suk Ki Kim
  • Patent number: 8906769
    Abstract: An insulating film and another insulating film are formed over a semiconductor substrate in that order to cover first, second, and third gate electrodes. The another insulating film is etched back to form sidewall spacers over side surfaces of the insulating film. Then, the sidewall spacers over the side surfaces of the insulating films corresponding to the sidewalls of the first and second gate electrodes are removed to leave the sidewall spacers over the side surfaces of the insulating film corresponding to the sidewalls of the third gate electrode. Then, the sidewall spacers and the insulating films are etched back, so that the sidewall spacers are formed of the insulating film over the sidewalls of the first, second, and third gate electrodes.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: December 9, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Koji Maekawa, Tatsuyoshi Mihara
  • Patent number: 8866124
    Abstract: In a first aspect, a vertical semiconductor diode is provided that includes (1) a first semiconductor layer formed above a substrate; (2) a second semiconductor layer formed above the first semiconductor layer; (3) a first native oxide layer formed above the first semiconductor layer; and (4) a third semiconductor layer formed above the first semiconductor layer, second semiconductor layer and first native oxide layer so as to form the vertical semiconductor diode that includes the first native oxide layer. Numerous other aspects are provided.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: October 21, 2014
    Assignee: SanDisk 3D LLC
    Inventors: Steven Maxwell, Abhijit Bandyopadhyay, Kun Hou, Er-Xuan Ping, Yung-Tin Chen, Li Xiao
  • Patent number: 8791010
    Abstract: A method of forming a memory device. A first thickness of dielectric material overlies a surface region of a substrate. A first wiring material including a first lining material and a silver material are formed overlying the dielectric material. A first adhesion material and an amorphous silicon switching material including a contact material are deposited overlying the first wiring material. The method forms one or more first structures configured to spatially extend in a first direction from the amorphous silicon switching material, the contact material, and the first wiring material. A thickness of second dielectric material is deposited overlying the one or more first structures. The method forms a second wiring structure comprising at least a second silver material and a second lining material spatially extending in a second direction orthogonal to the first direction overlying the second dielectric material and in electrical contact with the switching material.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: July 29, 2014
    Assignee: Crossbar, Inc.
    Inventor: Scott Brad Herner
  • Patent number: 8785903
    Abstract: A memory cell array and a resistive variable memory device including the memory cell array are provided. The memory cell array includes a memory group. The memory cell array includes a pair of word lines, an inter-pattern insulating layer interposed between the pair of word lines, and a plurality of active pillars, each having one side contacted with the inter-pattern insulating layer and other sides surrounded by the word line.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: July 22, 2014
    Assignee: SK Hynix Inc.
    Inventors: Sung Cheoul Kim, Kang Sik Choi
  • Patent number: 8772101
    Abstract: One method includes forming first sidewall spacers adjacent opposite sides of a sacrificial gate structure and a gate cap layer, removing the gate cap layer and a portion of the first sidewall spacers to define reduced-height first sidewall spacers, forming second sidewall spacers, removing the sacrificial gate structure to thereby define a gate cavity, whereby a portion of the gate cavity is laterally defined by the second sidewall spacers, and forming a replacement gate structure in the gate cavity, wherein at least a first portion of the replacement gate structure is positioned between the second sidewall spacers. A device includes a gate structure positioned above the substrate between first and second spaced-apart portions of a layer of insulating material and a plurality of first sidewall spacers, each of which are positioned between the gate structure and on one of the first and second portions of the layer of insulating material.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: July 8, 2014
    Assignees: GLOBALFOUNDRIES Inc., International Business Machines Corporation
    Inventors: Ruilong Xie, Ponoth Shom, Cho Jin, Charan Veera Venkata Satya Surisetty
  • Patent number: 8735862
    Abstract: Some embodiments include memory cells which have multiple programmable material structures between a pair of electrodes. One of the programmable material structures has a first edge, and another of the programmable material structures has a second edge that contacts the first edge. Some embodiments include methods of forming an array of memory cells. First programmable material segments are formed over bottom electrodes. The first programmable material segments extend along a first axis. Lines of second programmable material are formed over the first programmable material segments, and are formed to extend along a second axis that intersects the first axis. The second programmable material lines have lower surfaces that contact upper surfaces of the first programmable material segments. Top electrode lines are formed over the second programmable material lines.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: May 27, 2014
    Assignee: Micron Technology, Inc.
    Inventors: Jun Liu, John K. Zahurak
  • Patent number: 8723153
    Abstract: Formulations for voltage switchable dielectric materials include two or more different types of semiconductive materials uniformly dispersed within a dielectric matrix material. The semiconductive materials are selected to have different bandgap energies in order to provide the voltage switchable dielectric material with a stepped voltage response. The semiconductive materials may comprise inorganic particles, organic particles, or an organic material that is soluble in, or miscible with, the dielectric matrix material. Formulations optionally can also include electrically conductive materials. At least one of the conductive or semiconductive materials in a formulation can comprise particles characterized by an aspect ratio of at least 3 or greater.
    Type: Grant
    Filed: April 14, 2012
    Date of Patent: May 13, 2014
    Assignee: Littelfuse, Inc.
    Inventors: Lex Kosowsky, Robert Fleming
  • Patent number: 8623736
    Abstract: Memory cells of a memory device including a variable resistance material have a cavity between the memory cells. Electronic systems include such memory devices. Methods of forming a memory device include providing a cavity between memory cells of the memory device.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: January 7, 2014
    Assignee: Micron Technology, Inc.
    Inventor: Jun Liu
  • Patent number: 8461009
    Abstract: Process for enhancing strain in a channel with a stress liner, spacer, process for forming integrated circuit and integrated circuit. A first spacer composed of an first oxide and first nitride layer is applied to a gate electrode on a substrate, and a second spacer composed of a second oxide and second nitride layer is applied. Deep implanting of source and drain in the substrate occurs, and removal of the second nitride, second oxide, and first nitride layers.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: June 11, 2013
    Assignees: International Business Machines Corporation, Chartered Semiconductor Manufacturing Ltd.
    Inventors: Atul C. Ajmera, Christopher V. Baiocco, Xiangdong Chen, Wenzhi Gao, Young Way Teh
  • Patent number: 8455329
    Abstract: A phase change memory device capable of increasing a sensing margin and a method for manufacturing the same. The phase change memory device includes a semiconductor substrate formed with a device isolation structure which defines active regions; first conductivity type impurity regions formed in surfaces of the active regions and having the shape of a line; a second conductivity type well formed in the semiconductor substrate at a position lower than the device isolation structure; a second conductivity type ion-implantation layer formed in the semiconductor substrate at a boundary between a lower end of the device isolation structure and the semiconductor substrate; a plurality of vertical PN diodes formed on the first conductivity type impurity regions; and phase change memory cells formed on the vertical PN diodes.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: June 4, 2013
    Assignee: Hynix Semiconductor Inc.
    Inventor: Heon Yong Chang
  • Patent number: 8440535
    Abstract: A phase change memory may include an ovonic threshold switch formed over an cyanic memory. In one embodiment, the switch includes a chalcogenide layer that overlaps an underlying electrode. Then, edge damage, due to etching the chalcogenide layer, may be isolated to reduce leakage current.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: May 14, 2013
    Assignee: Ovonyx, Inc.
    Inventor: Charles H. Dennison
  • Patent number: 8384060
    Abstract: Provided is a resistive memory device that can be integrated with a high integration density and method of forming the same. In an embodiment, a bit line is formed of copper using a damascene technique, and when the copper bit line, a copper stud may be formed around the copper bit line.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: February 26, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung-Chang Ryoo, Jae-Hee Oh, Jung-Hoon Park, Hyeong-Jun Kim, Dong-Won Lim
  • Patent number: 8367464
    Abstract: A non-volatile memory cell that includes a first electrode; a second electrode; and an electrical contact region that electrically connects the first electrode and the second electrode, the electrical contact region has a end portion and a continuous side portion, and together, the end portion and the continuous side portion form an open cavity, wherein the memory cell has a high resistance state and a low resistance state that can be switched by applying a voltage across the first electrode and the second electrode.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: February 5, 2013
    Assignee: Seagate Technology LLC
    Inventors: Venugopalan Vaithyanathan, Wei Tian, Insik Jin
  • Patent number: 8338816
    Abstract: A nonvolatile memory element of the present invention comprises a first electrode (503); a second electrode (505); and a resistance variable layer (504) which is disposed between the first electrode (503) and the second electrode (505), a resistance value of the resistance variable layer being changeable in response to electric signals which are applied between the first electrode (503) and the second electrode (505), wherein the first electrode and the second electrode comprise materials which are made of different elements.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: December 25, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshihiko Kanzawa, Shunsaku Muraoka, Satoru Mitani, Zhiqiang Wei, Takeshi Takagi
  • Patent number: 8323995
    Abstract: Some embodiments include methods of forming diodes. The methods may include oxidation of an upper surface of a conductive electrode to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of an oxidizable material over a conductive electrode, and subsequent oxidation of the oxidizable material to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of a metal halide layer over a conductive electrode. Some embodiments include diodes that contain a metal halide layer between a pair of diode electrodes.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: December 4, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Gurtej S. Sandhu, Bhaskar Srinivasan
  • Patent number: 8299450
    Abstract: A non-volatile memory device includes a lower electrode, a phase-change material layer formed on the lower electrode so as to be electrically connected to the lower electrode, and an upper electrode formed on the phase-change material layer so as to be electrically connected to the phase-change material layer. The phase-change material layer includes a phase-change material including a composition represented by the formula (I)A(IIXIIIYIVZ)(1-A), where I is at least one of As and Se, II is at least one of Ge, Si and Sn, III is at least one of Sb and Bi, and IV is at least one of Te and Se, and where 0.001?A?0.3, 0.001?X?0.3, 0.001?Y?0.8, 0.1?Z?0.8, and X+Y+Z=1.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: October 30, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-ho Ahn, Hideki Horii, Soon-oh Park, Young-hyun Kim, Heo-ju Shin, Jin-ho Oh
  • Patent number: 8242034
    Abstract: Phase change memory devices and methods for manufacturing the same are provided. An exemplary embodiment of a phase change memory device includes a bottom electrode formed over a substrate. A first dielectric layer is formed over the bottom electrode. A heating electrode is formed in the first dielectric layer and partially protrudes over the first dielectric layer, wherein the heating electrode includes an intrinsic portion embedded within the first dielectric layer, a reduced portion stacked over the intrinsic portion, and an oxide spacer surrounding a sidewall of the reduced portion. A phase change material layer is formed over the first dielectric layer and covers the heating electrode, the phase change material layer contacts a top surface of the reduced portion of the heating electrode. A top electrode is formed over the phase change material layer and contacts the phase change material layer.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: August 14, 2012
    Assignee: Powerchip Technology Corporation
    Inventors: Yung-Fa Lin, Te-Chun Wang
  • Patent number: 8236685
    Abstract: A phase change memory device having multiple metal silicide layers which enhances the current driving capability of switching elements and a method of manufacturing the same are presented. The device also includes switching elements, heaters, stack patterns, top electrodes, bit lines, word line contacts and word lines. The bottom of the switching elements are in electrical contact with the lower metal silicide layer and with an active area of silicon substrate. An upper metal silicide layer is interfaced between the top of the switching elements and the heaters. The stack patterns include phase change layers and top electrodes and are between the heaters and the top electrodes are in electrical contact with the top electrodes. The bit lines contact with the top electrode contacts. The word line contacts to the lower metal silicide film.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: August 7, 2012
    Assignee: Hynix Semiconductor Inc.
    Inventor: Nam Kyun Park
  • Patent number: 8163595
    Abstract: Formulations for voltage switchable dielectric materials include two or more different types of semiconductive materials uniformly dispersed within a dielectric matrix material. The semiconductive materials are selected to have different bandgap energies in order to provide the voltage switchable dielectric material with a stepped voltage response. The semiconductive materials may comprise inorganic particles, organic particles, or an organic material that is soluble in, or miscible with, the dielectric matrix material. Formulations optionally can also include electrically conductive materials. At least one of the conductive or semiconductive materials in a formulation can comprise particles characterized by an aspect ratio of at least 3 or greater.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: April 24, 2012
    Assignee: Shocking Technologies, Inc.
    Inventors: Lex Kosowsky, Robert Fleming
  • Patent number: 8143611
    Abstract: A phase-change memory element includes a perovskite layer formed by a material having a perovskite structure, and a phase-change recording material layer which is formed on the perovskite layer, and changes the phase to a crystal state or amorphous state when supplied with an electric current via the perovskite layer.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: March 27, 2012
    Assignee: Canon Anelva Corporation
    Inventors: Young-suk Choi, Koji Tsunekawa
  • Patent number: 8129705
    Abstract: Provided is a nonvolatile memory device including a phase-change memory configured with cross-point memory cells in which memory elements formed of a phase-change material and selection elements formed with a diode are combined. A memory cell is configured with a memory element formed of a phase-change material and a selection element formed with a diode having a stacked structure of a first polycrystalline silicon film, a second polycrystalline silicon film, and a third polycrystalline silicon film. The memory cells are arranged at intersection points of a plurality of first metal wirings extending along a first direction with a plurality of third metal wirings extending along a second direction orthogonal to the first direction. An interlayer film is formed between adjacent selection elements and between adjacent memory elements, and voids are formed in the interlayer film provided between the adjacent memory elements.
    Type: Grant
    Filed: May 2, 2009
    Date of Patent: March 6, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Masaharu Kinoshita, Yoshitaka Sasago, Norikatsu Takaura
  • Patent number: 8049197
    Abstract: One embodiment is a phase change memory that includes a heater element transversely contacting a storage element of phase change material. In particular, an end of the storage element contacts an end of the heater element. A first pair of dielectric spacers is positioned on opposite sides of the first heater element and a second pair of dielectric spacers is positioned on opposite sides of the first storage element. The storage element, heater element, and first and second pairs of dielectric spacers can be made by a spacer patterning technique.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: November 1, 2011
    Assignee: STMicroelectronics S.r.l.
    Inventor: DerChang Kau
  • Patent number: 8039392
    Abstract: A memory device has a sidewall insulating member with a sidewall insulating member length according to a first spacer layer thickness. A first electrode formed from a second spacer layer having a first electrode length according to a thickness of a second spacer layer and a second electrode formed from the second spacer layer having a second electrode length according to the thickness of the second spacer layer are formed on sidewalls of the sidewall insulating member. A bridge of memory material having a bridge width extends from a top surface of the first electrode to a top surface of the second electrode across a top surface of the sidewall insulating member, wherein the bridge comprises memory material.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: October 18, 2011
    Assignee: Macronix International Co., Ltd.
    Inventors: Erh-Kun Lai, ChiaHua Ho, Kuang Yeu Hsieh
  • Patent number: 8022502
    Abstract: A nonvolatile memory element comprises a first electrode layer (103), a second electrode (107), and a resistance variable layer (106) which is disposed between the first electrode layer (103) and the second electrode layer (107), a resistance value of the resistance variable layer varying reversibly according to electric signals having different polarities which are applied between the electrodes (103), (107), wherein the resistance variable layer (106) has a first region comprising a first oxygen-deficient tantalum oxide having a composition represented by TaOx (0<x<2.5) and a second region comprising a second oxygen-deficient tantalum oxide having a composition represented by TaOy (x<y<2.5), the first region and the second region being arranged in a thickness direction of the resistance variable layer.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: September 20, 2011
    Assignee: Panasonic Corporation
    Inventors: Yoshihiko Kanzawa, Koji Katayama, Satoru Fujii, Shunsaku Muraoka, Koichi Osano, Satoru Mitani, Ryoko Miyanaga, Takeshi Takagi, Kazuhiko Shimakawa
  • Patent number: 8017430
    Abstract: A battery can be fabricated from a substrate including silicon. This allows the battery to be produced as an integrated unit. The battery includes an anode formed from an array of spaced elongated structures, such as pillars, which include silicon and which can be fabricated on the substrate. The battery also includes a cathode which can include lithium.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: September 13, 2011
    Assignee: Nexeon Ltd.
    Inventor: Mino Green
  • Patent number: 8008648
    Abstract: Embodiments of the present invention are directed to nanoscale memristor devices that provide nonvolatile memristive switching. In one embodiment, a memristor device comprises an active region disposed between a first electrode and a second electrode. The device includes a first insulation element disposed between the first electrode and an outer portion of a first surface of the active region. The first insulation element is configured with one or more opening through which the first electrode makes physical contact with the active region. The device also includes a second insulation element disposed between the second electrode and an outer portion of a second surface of the active region. The second insulation element is configured with one or more opening through which the second electrode makes physical contact with the second surface.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: August 30, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexandre M. Bratkovski, Qiangfei Xia
  • Patent number: 7951619
    Abstract: Some embodiments include methods of forming diodes. The methods may include oxidation of an upper surface of a conductive electrode to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of an oxidizable material over a conductive electrode, and subsequent oxidation of the oxidizable material to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of a metal halide layer over a conductive electrode. Some embodiments include diodes that contain a metal halide layer between a pair of diode electrodes.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: May 31, 2011
    Assignee: Micron Technology, Inc.
    Inventors: Gurtej S. Sandhu, Bhaskar Srinivasan
  • Patent number: 7943920
    Abstract: A memory device comprises first and second electrodes with a memory element and a buffer layer located between and electrically coupled to them. The memory element comprises one or more metal oxygen compounds. The buffer layer comprises at least one of an oxide and a nitride. Another memory device comprises first and second electrodes with a memory element and a buffer layer, having a thickness of less than 50 ?, located between and electrically coupled to them. The memory comprises one or more metal oxygen compounds. An example of a method of fabricating a memory device includes forming first and second electrodes. A memory, located between and electrically coupled to the first and the second electrodes, is formed; the memory comprises one or more metal oxygen compounds and the buffer layer comprises at least one of an oxide and a nitride.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: May 17, 2011
    Assignee: Macronix International Co., Ltd.
    Inventors: Wei-Chih Chien, Kuo-Pin Chang, Erh-Kun Lai, Kuang Yeu Hsieh
  • Patent number: 7939815
    Abstract: By making an ovonic threshold switch using a carbon interfacial layer having a thickness of less than or equal to ten percent of the thickness of the associated electrode, cycle endurance may be improved. In some embodiments, a glue layer may be used between the carbon and the chalcogenide of the ovonic threshold switch. The glue layer may be effective to improve adherence between carbon and chalcogenide.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: May 10, 2011
    Assignee: STMicroelectronics S.r.l.
    Inventors: Jinwook Lee, Kuo-wei Chang, Jason S. Reid, Wim Y. Deweerd, Aleshandre M. Diaz
  • Patent number: 7935564
    Abstract: A method and memory cell including self-converged bottom electrode ring. The method includes forming a step spacer, a top insulating layer, an intermediate insulating layer, and a bottom insulating layer above a substrate. The method includes forming a step spacer within the top insulating layer and the intermediate insulating layer. The step spacer size is easily controlled. The method also includes forming a passage in the bottom insulating layer with the step spacer as a mask. The method includes forming bottom electrode ring within the passage comprising a cup-shaped outer conductive layer within the passage and forming an inner insulating layer within the cup-shaped outer conductive layer. The method including forming a phase change layer above the bottom electrode ring and a top electrode above the bottom electrode ring.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: May 3, 2011
    Assignee: International Business Machines Corporation
    Inventors: Matthew J. Breitwisch, Chung H. Lam, Hsiang-Lan Lung
  • Patent number: 7932101
    Abstract: A memory device with improved heat transfer characteristics. The device first includes a dielectric material layer; first and second electrodes, vertically separated and having mutually opposed contact surfaces. A phase change memory element is encased within the dielectric material layer, including a phase-change layer positioned between and in electrical contact with the electrodes, wherein the lateral extent of the phase change layer is less than the lateral extent of the electrodes. An isolation material is positioned between the phase change layer and the dielectric layer, wherein the thermal conductivity of the isolation material is lower than the thermal conductivity of the dielectric material.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: April 26, 2011
    Assignee: Macronix International Co., Ltd.
    Inventor: Hsiang-Lan Lung
  • Patent number: 7932506
    Abstract: Memory devices are described along with methods for manufacturing. A memory device as described herein includes a plurality of memory cells. Each memory cell in the plurality of memory cells comprises a diode comprising doped semiconductor material and a dielectric spacer on the diode and defining an opening, the dielectric spacer having sides self-aligned with sides of the diode. Each memory cell further comprises a memory element on the dielectric spacer and including a portion within the opening contacting a top surface of the diode.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: April 26, 2011
    Assignees: Macronix International Co., Ltd., International Business Machines Corporation
    Inventors: Hsiang-Lan Lung, Chung Hon Lam
  • Patent number: 7932510
    Abstract: A method for manufacturing carbon nanotubes includes the steps of: (a) depositing catalytic fine particles containing Al—Fe, Zr—Co or Hf—Co on a base body; and (b) growing carbon nanotubes on the catalytic fine particles deposited on the base body.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: April 26, 2011
    Assignee: Fujitsu Limited
    Inventors: Daiyu Kondo, Shintaro Sato
  • Patent number: 7924603
    Abstract: A PCRAM memory device having a chalcogenide glass layer, preferably comprising antimony selenide having a stoichiometric formula of about Sb2Se3, and a metal-chalcogenide layer and methods of forming such a memory device.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: April 12, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Kristy A. Campbell
  • Patent number: 7910904
    Abstract: A phase change memory may be formed which is amenable to multilevel programming. The phase change material may be formed with a lateral extent which does not exceed the lateral extent of an underlying heater. As a result, the possibility of current bypassing the amorphous phase change material in the reset state is reduced, reducing the programming current that is necessary to prevent this situation. In addition, a more controllable multilevel phase change memory may be formed in some embodiments.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: March 22, 2011
    Assignee: Ovonyx, Inc.
    Inventors: Charles C. Kuo, Ilya V. Karpov
  • Patent number: 7888665
    Abstract: An integrated circuit includes a first electrode and a cup-shaped electrode interface coupled to the first electrode. The integrated circuit includes a dielectric spacer at least partially laterally enclosed by the electrode interface and a resistance changing material laterally enclosed by the spacer and contacting the electrode interface. The integrated circuit includes a second electrode coupled to the resistance changing material.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: February 15, 2011
    Assignee: Qimonda AG
    Inventors: Thomas Happ, Jan Boris Philipp
  • Patent number: 7884345
    Abstract: A phase-change material and a memory unit using the phase-change material are provided. The phase-change material is in a single crystalline state and includes a compound of a metal oxide or nitroxide, wherein the metal is at least one selected from a group consisting of indium, gallium and germanium. The memory unit includes a substrate; at least a first contact electrode formed on the substrate; a dielectric layer disposed on the substrate and formed with an opening for a layer of the phase-change material to be formed therein; and at least a second contact electrode disposed on the dielectric layer. As the phase-change material is in a single crystalline state and of a great discrepancy between high and low resistance states, the memory unit using the phase-changed material can achieve a phase-change characteristic rapidly by pulse voltage and avert any incomplete reset while with a low critical power.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: February 8, 2011
    Assignee: National Taiwan University
    Inventors: Lung-Han Peng, Sung-Li Wang, Meng-Kuei Hsieh, Chien-Yu Chen
  • Patent number: 7883930
    Abstract: A phase change memory including at least a storage cell which includes a first electrode, an electrically conductive portion provided on the first electrode and having at least two electrically conductive bodies with approximately the same shape provided on the first electrode, the electrically conductive bodies being spaced by a high resistance film with a high resistance, a recording layer provided on the electrically conductive portion and having phase change material which can change between a first phase state with a first specific resistance and a second phase state with a second specific resistance different from the first specific resistance, and a second electrode provided on the recording layer.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: February 8, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Tsukamoto, Katsuyuki Naito, Sumio Ashida
  • Patent number: 7872251
    Abstract: Formulations for voltage switchable dielectric materials include two or more different types of semiconductive materials uniformly dispersed within a dielectric matrix material. The semiconductive materials are selected to have different bandgap energies in order to provide the voltage switchable dielectric material with a stepped voltage response. The semiconductive materials can comprise inorganic particles, organic particles, or an organic material that is soluble in, or miscible with, the dielectric matrix material. Formulations optionally can also include electrically conductive materials. At least one of the conductive or semiconductive materials in a formulation can comprise particles characterized by an aspect ratio of at least 3 or greater.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: January 18, 2011
    Assignee: Shocking Technologies, Inc.
    Inventors: Lex Kosowsky, Robert Fleming
  • Patent number: 7842535
    Abstract: A silicon/lithium battery can be fabricated from a silicon substrate. This allows the battery to be produced as an integrated unit on a chip. The battery includes a silicon anode formed from submicron diameter pillars of silicon fabricated on an n-type silicon wafer. The battery also includes a cathode including lithium.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: November 30, 2010
    Assignee: Nexeon Ltd.
    Inventor: Mino Green
  • Patent number: 7834339
    Abstract: The present invention relates to a memory cell comprising: a resistive structure; at least two electrodes coupled to the resistive structure, and at least one hydrogen reservoir structure, wherein the application of an electrical signal to one of the at least two electrodes causes the electrical resistance of the resistive structure to be modified by altering a hydrogen-ion concentration in the resistive structure.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: November 16, 2010
    Assignee: International Business Machines Corporation
    Inventors: Johannes G. Bednorz, Eric A. Joseph, Siegfried F. Karg, Chung H. Lam, Gerhard I. Meijer, Alejandro G. Schrott
  • Patent number: 7824954
    Abstract: Phase change memory devices can have bottom patterns on a substrate. Line-shaped or L-shaped bottom electrodes can be formed in contact with respective bottom patterns on a substrate and to have top surfaces defined by dimensions in x and y axes directions on the substrate. The dimension along the x-axis of the top surface of the bottom electrodes has less width than a resolution limit of a photolithography process used to fabricate the phase change memory device. Phase change patterns can be formed in contact with the top surface of the bottom electrodes to have a greater width than each of the dimensions in the x and y axes directions of the top surface of the bottom electrodes and top electrodes can be formed on the phase change patterns, wherein the line shape or the L shape represents a sectional line shape or a sectional L shape of the bottom electrodes in the x-axis direction.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: November 2, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyeong-Geun An, Dong-Ho Ahn, Young-Soo Lim, Yong-Ho Ha, Jun-Young Jang, Dong-Won Lim, Gyeo-Re Lee, Joon-Sang Park, Han-Bong Ko, Young-Lim Park
  • Patent number: 7811840
    Abstract: Some embodiments include methods of forming diodes. The methods may include oxidation of an upper surface of a conductive electrode to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of an oxidizable material over a conductive electrode, and subsequent oxidation of the oxidizable material to form an oxide layer over the conductive electrode. In some embodiments, the methods may include formation of a metal halide layer over a conductive electrode. Some embodiments include diodes that contain a metal halide layer between a pair of diode electrodes.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: October 12, 2010
    Assignee: Micron Technology, Inc.
    Inventors: Gurtej S. Sandhu, Bhaskar Srinivasan
  • Patent number: 7777215
    Abstract: A memory device comprises first and second electrodes with a memory element and a buffer layer located between and electrically coupled to them. The memory element comprises one or more metal oxygen compounds. The buffer layer comprises at least one of an oxide and a nitride. Another memory device comprises first and second electrodes with a memory element and a buffer layer, having a thickness of less than 50 ?, located between and electrically coupled to them. The memory comprises one or more metal oxygen compounds. An example of a method of fabricating a memory device includes forming first and second electrodes. A memory, located between and electrically coupled to the first and the second electrodes, is formed; the memory comprises one or more metal oxygen compounds and the buffer layer comprises at least one of an oxide and a nitride.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: August 17, 2010
    Assignee: Macronix International Co., Ltd.
    Inventors: Wei-Chih Chien, Kuo-Pin Chang, Erh-Kun Lai, Kuang Yeu Hsieh
  • Patent number: 7763492
    Abstract: A phase change memory device, and method of making the same, that includes a trench formed in insulation material having opposing sidewalls that are inwardly sloping with trench depth. A first electrode is formed in the trench. Phase change memory material is formed in electrical contact with the first electrode. A second electrode is formed in electrical contact with the phase change memory material. Voids are formed in the insulation material to impede heat from the phase change memory material from conducting away therefrom. The voids are formed in pairs, with either a portion of the phase change memory material or the second electrode disposed between the voids.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: July 27, 2010
    Assignee: Silicon Storage Technology, Inc.
    Inventor: Bomy Chen
  • Patent number: 7754573
    Abstract: A method for manufacturing a semiconductor device. In one example embodiment of the present invention, a method for manufacturing a semiconductor device includes various steps. First, a gate pattern is formed on a substrate. Next, a first oxide layer is formed on the gate pattern. Then, a second oxide layer, a first silicon nitride layer, and a second silicon nitride layer are sequentially formed over the substrate and the first oxide layer. Next, a first etching process is performed to remove horizontal portions of the first and second silicon nitride layers. Then, source/drain regions are formed in the substrate. Next, the vertical portions first and second silicon nitride layers are removed. Then, a third silicon nitride layer is formed over the second oxide layer. Finally, a second etching process is performed to remove horizontal portions of the third silicon nitride layer and the second oxide layer.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: July 13, 2010
    Assignee: Dongbu Hitek Co., Ltd.
    Inventor: Sung Jin Kim