Layered (e.g., A Diffusion Barrier Material Layer Or A Silicide Layer Or A Precious Metal Layer) Patents (Class 257/486)
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Patent number: 11805662Abstract: A memory device includes a first electrode, a selector layer and a plurality of first work function layers. The first work function layers are disposed between the first electrode and the selector layer, and a work function of the first work function layer increases as the first work function layer becomes closer to the selector layer.Type: GrantFiled: May 5, 2022Date of Patent: October 31, 2023Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Hung-Li Chiang, Jung-Piao Chiu, Tzu-Chiang Chen, Yu-Sheng Chen, Xinyu Bao
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Patent number: 10868014Abstract: A method includes etching a hybrid substrate to form a recess extending into the hybrid substrate. The hybrid substrate includes a first semiconductor layer having a first surface orientation, a dielectric layer over the first semiconductor layer, and a second semiconductor layer having a second surface orientation different from the first surface orientation. After the etching, a top surface of the first semiconductor layer is exposed to the recess. A spacer is formed on a sidewall of the recess. The spacer contacts a sidewall of the dielectric layer and a sidewall of the second semiconductor layer. An epitaxy is performed to grow an epitaxy semiconductor region from the first semiconductor layer. The spacer is removed.Type: GrantFiled: January 13, 2020Date of Patent: December 15, 2020Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Kuo-Cheng Chiang, Shi Ning Ju, Ching-Wei Tsai, Kuan-Lun Cheng, Chih-Hao Wang
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Patent number: 10868015Abstract: A method includes etching a hybrid substrate to form a recess extending into the hybrid substrate. The hybrid substrate includes a first semiconductor layer having a first surface orientation, a dielectric layer over the first semiconductor layer, and a second semiconductor layer having a second surface orientation different from the first surface orientation. After the etching, a top surface of the first semiconductor layer is exposed to the recess. A spacer is formed on a sidewall of the recess. The spacer contacts a sidewall of the dielectric layer and a sidewall of the second semiconductor layer. An epitaxy is performed to grow an epitaxy semiconductor region from the first semiconductor layer. The spacer is removed.Type: GrantFiled: June 12, 2020Date of Patent: December 15, 2020Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Kuo-Cheng Chiang, Shi Ning Ju, Ching-Wei Tsai, Kuan-Lun Cheng, Chih-Hao Wang
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Patent number: 10768316Abstract: An X-ray detector based on silicon carbide single crystal as well as its preparation method. The detector mainly includes: high resistivity silicon carbide single crystal, high electron concentration n-type silicon carbide layer, low electron concentration n-type silicon carbide layer, high hole concentration p-type silicon carbide layer, low hole concentration p-type silicon carbide layer, silicon dioxide protection layer, p-type silicon carbide ohmic contact electrode, n-type silicon carbide ohmic contact electrode, and gold lead electrode. The invention provides an effective and simple process manufacturing technology, solves the preparation problem of silicon carbide-based high-energy X-ray detector, and realizes the development of a new silicon carbide radiation detector.Type: GrantFiled: April 12, 2018Date of Patent: September 8, 2020Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Hongwei Liang, Xiaochuan Xia, Heqiu Zhang
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Patent number: 10535656Abstract: A method includes etching a hybrid substrate to form a recess extending into the hybrid substrate. The hybrid substrate includes a first semiconductor layer having a first surface orientation, a dielectric layer over the first semiconductor layer, and a second semiconductor layer having a second surface orientation different from the first surface orientation. After the etching, a top surface of the first semiconductor layer is exposed to the recess. A spacer is formed on a sidewall of the recess. The spacer contacts a sidewall of the dielectric layer and a sidewall of the second semiconductor layer. An epitaxy is performed to grow an epitaxy semiconductor region from the first semiconductor layer. The spacer is removed.Type: GrantFiled: November 30, 2018Date of Patent: January 14, 2020Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Kuo-Cheng Chiang, Shi Ning Ju, Ching-Wei Tsai, Kuan-Lun Cheng, Chih-Hao Wang
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Patent number: 10367054Abstract: A semiconductor memory device according to an embodiment comprises a plurality of control gate electrodes, a first semiconductor layer, and a gate insulating layer. The plurality of control gate electrodes are arranged in a first direction that intersects a surface of a substrate. The first semiconductor layer extends in the first direction and faces side surfaces in a second direction intersecting the first direction, of the plurality of control gate electrodes. The gate insulating layer is provided between the control gate electrode and the first semiconductor layer. In addition, the first semiconductor layer includes: a first portion having a first plane orientation; and a second portion having a second plane orientation which is different from the first plane orientation.Type: GrantFiled: September 8, 2017Date of Patent: July 30, 2019Assignee: TOSHIBA MEMORY CORPORATIONInventors: Hidenori Miyagawa, Riichiro Takaishi, Toshinori Numata
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Patent number: 10269803Abstract: A method includes etching a hybrid substrate to form a recess extending into the hybrid substrate. The hybrid substrate includes a first semiconductor layer having a first surface orientation, a dielectric layer over the first semiconductor layer, and a second semiconductor layer having a second surface orientation different from the first surface orientation. After the etching, a top surface of the first semiconductor layer is exposed to the recess. A spacer is formed on a sidewall of the recess. The spacer contacts a sidewall of the dielectric layer and a sidewall of the second semiconductor layer. An epitaxy is performed to grow an epitaxy semiconductor region from the first semiconductor layer. The spacer is removed.Type: GrantFiled: August 31, 2017Date of Patent: April 23, 2019Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Kuo-Cheng Ching, Shi Ning Ju, Ching-Wei Tsai, Kuan-Lun Cheng, Chih-Hao Wang
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Patent number: 9853025Abstract: A semiconductor device having an integrated thin film metallic resistor device which is formed by a process which includes depositing a conformal layer of insulating material on a substrate, wherein the conformal layer of insulating layer is formed with an initial thickness T, applying a surface treatment to a surface of the conformal layer of insulating material to convert the surface of the conformal layer of insulating material to a layer of conductive metallic material of thickness T1, which is less than T, and forming device contacts to portions of the layer of conductive metallic material. The layer of conductive metallic material and the device contacts form a thin film metallic resistor device. As an example, the conformal layer of insulating material includes Ta3N5, and the layer of conductive metallic material that is formed by the surface treatment includes TaN.Type: GrantFiled: October 14, 2016Date of Patent: December 26, 2017Assignee: International Business Machines CorporationInventor: Chih-Chao Yang
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Patent number: 9508643Abstract: An electronic component includes: a plate-shaped semiconductor element connected to a metallic contacting by a sinter layer; a dielectric layer having a surface metal layer disposed thereon, the dielectric layer being provided in an edge region of the semiconductor element, the edge region being provided with raised areas and depressions by patterning of the dielectric layer and/or the surface metal layer; and the sinter layer covers the edge region with the raised areas and depressions and thereby connects the edge region to the metallic contacting.Type: GrantFiled: September 2, 2015Date of Patent: November 29, 2016Assignee: ROBERT BOSCH GMBHInventor: Alfred Goerlach
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Patent number: 9425096Abstract: Systems and methods are directed to a semiconductor device, which includes an integrated circuit, wherein the integrated circuit includes at least a first layer comprising two or more Tungsten lines and at least one air gap between at least two Tungsten lines, the air gaps to reduce capacitance. An interposer is coupled to the integrated circuit, to reduce stress on the two or more Tungsten lines and the at least one air gap. A laminated package substrate may be attached to the interposer such that the interposer is configured to absorb mechanical stress induced by mismatch in coefficient of thermal expansion (CTE) between the laminated package substrate and the interposer and protect the air gap from the mechanical stress.Type: GrantFiled: July 14, 2014Date of Patent: August 23, 2016Assignee: QUALCOMM INCORPORATEDInventors: Shiqun Gu, Matthew Michael Nowak, Jeffrey Junhao Xu
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Patent number: 9041142Abstract: A semiconductor device and an operating method for the same are provided. The semiconductor structure comprises a first doped region, a second doped region, a third doped region, a fourth doped region and a first gate structure. The first doped region has a first type conductivity. The second doped region has a second type conductivity opposite to the first type conductivity. The first doped region is surrounded by the second doped region. The third doped region has the first type conductivity. The fourth doped region has the second type conductivity. The first gate structure is on the second doped region. The third doped region and the fourth doped region are in the second doped region and the first doped region on opposing sides of the first gate structure respectively.Type: GrantFiled: December 11, 2012Date of Patent: May 26, 2015Assignee: MACRONIX INTERNATIONAL CO., LTD.Inventors: Ying-Chieh Tsai, Wing-Chor Chan, Jeng Gong
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Patent number: 9029947Abstract: A field device and method of operating high voltage semiconductor device applied with the same are provided. The field device includes a first well having a second conductive type and second well having a first conductive type both formed in the substrate (having the first conductive type) and extending down from a surface of the substrate, the second well adjacent to one side of the first well and the substrate is at the other side of the first well; a first doping region having the first conductive type and formed in the second well, the first doping region spaced apart from the first well; a conductive line electrically connected to the first doping region and across the first well region; and a conductive body insulatively positioned between the conductive line and the first well, and the conductive body correspondingly across the first well region.Type: GrantFiled: October 21, 2014Date of Patent: May 12, 2015Assignee: Macronix International Co., Ltd.Inventors: An-Li Cheng, Miao-Chun Chung, Chih-Chia Hsu, Yin-Fu Huang
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Publication number: 20150097261Abstract: An electrical contact and electrical interconnect network comprising graphene and a transition metal for a solid state device and an interconnect network for a circuit board or substrate are disclosed.Type: ApplicationFiled: October 3, 2014Publication date: April 9, 2015Inventor: James M. Harris
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Patent number: 8969195Abstract: Processes for improving adhesion of films to semiconductor wafers and a semiconductor structure are provided. By implementing the processes of the invention, it is possible to significantly suppress defect creation, e.g., decrease particle generation, during wafer fabrication processes. More specifically, the processes described significantly reduce flaking of a TaN film from edges or extreme edges (bevel) of the wafer by effectively increasing the adhesion properties of the TaN film on the wafer. The method increasing a mol percent of nitride with respect to a total tantalum plus nitride to 25% or greater during a barrier layer fabrication process.Type: GrantFiled: February 22, 2008Date of Patent: March 3, 2015Assignee: International Business Machines CorporationInventors: Felix P. Anderson, Steven P. Barkyoumb, Edward C. Cooney, III, Thomas L. McDevitt, William J. Murphy, David C. Strippe
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Patent number: 8956963Abstract: A Schottky barrier diode and fabricating method thereof are disclosed. A semiconductor substrate may have a first surface and a second surface positioned oppositely to be provided. Several trenches are formed on the first surface. Each trench has a sidewall with a first depth and a first bottom surface. An insulating material is formed on the first surface of the semiconductor substrate and on the sidewall and the first bottom surface of each trench, wherein the insulating material has a first thickness on the sidewall. The insulating material on the sidewall is patterned to define a second bottom surface having a second depth smaller than the first depth, and the removed portion of the insulating material on the sidewall has a second thickness smaller than the first thickness. Afterward, a contact metal layer is at least formed on the first surface between adjacent trenches.Type: GrantFiled: July 2, 2013Date of Patent: February 17, 2015Assignee: Industrial Technology Research InstituteInventors: Cheng-Tyng Yen, Kuan-Wei Chu, Lurng-Shehng Lee, Chwan-Ying Lee
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Patent number: 8884342Abstract: A semiconductor device includes a semiconductor body with a first surface, a contact electrode arranged on the first surface, and a passivation layer on the first surface adjacent the contact electrode. The passivation layer includes a layer stack with an amorphous semi-insulating layer on the first surface, a first nitride layer on the amorphous semi-insulating layer, and a second nitride layer on the first nitride layer.Type: GrantFiled: August 29, 2012Date of Patent: November 11, 2014Assignee: Infineon Technologies AGInventors: Gerhard Schmidt, Josef-Georg Bauer, Carsten Schaeffer, Oliver Humbel, Angelika Koprowski, Sirinpa Monayakul
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Publication number: 20140264252Abstract: Selector devices that can be suitable for memory device applications can have low leakage currents at low voltages to reduce sneak current paths for non selected devices, and high leakage currents at high voltages to minimize voltage drops during device switching. In some embodiments, the selector device can include a first electrode, a tri-layer dielectric layer, and a second electrode. The tri-layer dielectric layer can include a high leakage dielectric layer sandwiched between two lower leakage dielectric layers. The low leakage layers can function to restrict the current flow across the selector device at low voltages. The high leakage dielectric layer can function to enhance the current flow across the selector device at high voltages.Type: ApplicationFiled: June 3, 2014Publication date: September 18, 2014Applicant: Intermolecular, Inc.Inventors: Imran Hashim, Venkat Ananthan, Tony P. Chiang, Prashant B. Phatak
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Patent number: 8779527Abstract: A method and circuit in which the drive strength of a FinFET transistor can be selectively modified, and in particular can be selectively reduced, by omitting the LDD extension formation in the source and/or in the drain of the FinFET. One application of this approach is to enable differentiation of the drive strengths of transistors in an integrated circuit by applying the technique to some, but not all, of the transistors in the integrated circuit. In particular in a SRAM cell formed from FinFET transistors the application of the technique to the pass-gate transistors, which leads to a reduction of the drive strength of the pass-gate transistors relative to the drive strength of the pull-up and pull-down transistors, results in improved SRAM cell performance.Type: GrantFiled: October 8, 2012Date of Patent: July 15, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Thomas Merelle, Gerben Doornbos, Robert James Pascoe Lander
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Publication number: 20140145207Abstract: A Schottky barrier diode and fabricating method thereof are disclosed. A semiconductor substrate may have a first surface and a second surface positioned oppositely to be provided. Several trenches are formed on the first surface. Each trench has a sidewall with a first depth and a first bottom surface. An insulating material is formed on the first surface of the semiconductor substrate and on the sidewall and the first bottom surface of each trench, wherein the insulating material has a first thickness on the sidewall. The insulating material on the sidewall is patterned to define a second bottom surface having a second depth smaller than the first depth, and the removed portion of the insulating material on the sidewall has a second thickness smaller than the first thickness. Afterward, a contact metal layer is at least formed on the first surface between adjacent trenches.Type: ApplicationFiled: July 2, 2013Publication date: May 29, 2014Inventors: Cheng-Tyng YEN, Kuan-Wei CHU, Lurng-Shehng LEE, Chwan-Ying LEE
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Patent number: 8716826Abstract: In a semiconductor device having a pn-junction diode structure that includes anode diffusion region including edge area, anode electrode on anode diffusion region, and insulator film on edge area of anode diffusion region, the area of anode electrode above anode diffusion region with insulator film interposed between anode electrode and anode diffusion region is narrower than the area of insulator film on edge area of anode diffusion region.Type: GrantFiled: April 16, 2012Date of Patent: May 6, 2014Assignee: Fuji Electric Co., Ltd.Inventors: Ryouichi Kawano, Tomoyuki Yamazaki, Michio Nemoto, Mituhiro Kakefu
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Publication number: 20140061733Abstract: A semiconductor device includes a semiconductor body with a first surface, a contact electrode arranged on the first surface, and a passivation layer on the first surface adjacent the contact electrode. The passivation layer includes a layer stack with an amorphous semi-insulating layer on the first surface, a first nitride layer on the amorphous semi-insulating layer, and a second nitride layer on the first nitride layer.Type: ApplicationFiled: August 29, 2012Publication date: March 6, 2014Applicant: INFINEON TECHNOLOGIES AGInventors: Gerhard Schmidt, Josef-Georg Bauer, Carsten Schaeffer, Oliver Humbel, Angelika Koprowski, Sirinpa Monayakul
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Patent number: 8610233Abstract: A method of forming a transistor device includes forming a patterned gate structure over a semiconductor substrate, forming a raised source region over the semiconductor substrate adjacent a source side of the gate structure, and forming silicide contacts on the raised source region, on the patterned gate structure, and on the semiconductor substrate adjacent a drain side of the gate structure. Thereby, a hybrid field effect transistor (FET) structure having a drain side Schottky contact and a raised source side ohmic contact is defined.Type: GrantFiled: March 16, 2011Date of Patent: December 17, 2013Assignee: International Business Machines CorporationInventors: Kangguo Cheng, Ali Khakifirooz, Pranita Kulkarni, Ghavam G. Shahidi
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Patent number: 8592937Abstract: A pyroelectric detector includes a substrate, a support member and a pyroelectric detection element, which includes a capacitor, first and second reducing gas barrier layers, an insulating layer, a plug and a second electrode wiring layer. The first reducing gas barrier layer covers at least a second electrode and a pyroelectric body of the capacitor, and has a first opening that overlaps the second electrode in plan view. The insulating layer covers at least the first reducing gas barrier layer, and has a second opening that overlaps the first opening in plan view. The plug is disposed in the first and second openings and connected to the second electrode. The second electrode wiring layer is formed on the insulating layer and connected to the plug. The second reducing gas barrier layer is formed on the insulating layer and the second electrode wiring layer and covers at least the plug.Type: GrantFiled: February 13, 2012Date of Patent: November 26, 2013Assignee: Seiko Epson CorporationInventor: Takafumi Noda
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Patent number: 8524597Abstract: Methods and associated structures of forming a microelectronic structure are described. Those methods may comprise forming a conductive material in an interconnect opening within an interlayer dielectric material that is disposed on a substrate, forming a low density dielectric material on a surface of the dielectric layer and on a surface of the conductive material, and forming a high density dielectric barrier layer on the low density dielectric layer.Type: GrantFiled: October 18, 2011Date of Patent: September 3, 2013Assignee: Intel CorporationInventors: Sean W. King, Hui Jae Yoo
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Patent number: 8513765Abstract: A device and method for forming a semiconductor device include growing a raised semiconductor region on a channel layer adjacent to a gate structure. A space is formed between the raised semiconductor region and the gate structure. A metal layer is deposited on at least the raised semiconductor region. The raised semiconductor region is silicided to form a silicide into the channel layer which extends deeper into the channel layer at a position corresponding to the space.Type: GrantFiled: July 19, 2010Date of Patent: August 20, 2013Assignee: International Business Machines CorporationInventors: Kangguo Cheng, Bruce B. Doris, Ali Khakifirooz, Ghavam G. Shahidi
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Patent number: 8476731Abstract: In a Schottky electrode formation region on a nitride semiconductor, the total length of junctions of Schottky electrodes and a surface of a nitride semiconductor layer is longer than the perimeter of the Schottky electrode formation region. The total length is preferably 10 times longer than the perimeter. For example, the Schottky electrodes are formed concentrically and circularly.Type: GrantFiled: January 13, 2012Date of Patent: July 2, 2013Assignee: Hitachi, Ltd.Inventors: Akihisa Terano, Kazuhiro Mochizuki, Takashi Ishigaki
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Patent number: 8455322Abstract: Disclosed is an improved semiconductor structure (e.g., a silicon germanium (SiGe) hetero-junction bipolar transistor) having a narrow essentially interstitial-free SIC pedestal with minimal overlap of the extrinsic base. Also, disclosed is a method of forming the transistor which uses laser annealing, as opposed to rapid thermal annealing, of the SIC pedestal to produce both a narrow SIC pedestal and an essentially interstitial-free collector. Thus, the resulting SiGe HBT transistor can be produced with narrower base and collector space-charge regions than can be achieved with conventional technology.Type: GrantFiled: March 8, 2010Date of Patent: June 4, 2013Assignee: International Business Machines CorporationInventors: Oleg Gluschenkov, Rajendran Krishnasamy, Kathryn T. Schonenberg
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Patent number: 8431469Abstract: An electrical device in which an interface layer is disposed between and in contact with a metal and a Si-based semiconductor, the interface layer being of a thickness effective to depin of the Fermi level of the semiconductor while still permitting current to flow between the metal and the semiconductor. The interface layer may include a layer of a passivating material (e.g., made from nitrogen, oxygen, oxynitride, arsenic, hydrogen and/or fluorine) and sometimes also includes a separation layer. In some cases, the interface layer may be a monolayer of a semiconductor passivating material. The interface layer thickness corresponds to a minimum specific contact resistance of less than or equal to 10 ?-?m2 or even less than or equal to 1 ?-?m2 for the electrical device.Type: GrantFiled: February 7, 2011Date of Patent: April 30, 2013Assignee: Acorn Technologies, Inc.Inventors: Daniel E. Grupp, Daniel J. Connelly
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Patent number: 8415748Abstract: An epitaxial Ni silicide film that is substantially non-agglomerated at high temperatures, and a method for forming the epitaxial Ni silicide film, is provided. The Ni silicide film of the present disclosure is especially useful in the formation of ETSOI (extremely thin silicon-on-insulator) Schottky junction source/drain FETs. The resulting epitaxial Ni silicide film exhibits improved thermal stability and does not agglomerate at high temperatures.Type: GrantFiled: April 23, 2010Date of Patent: April 9, 2013Assignee: International Business Machines CorporationInventors: Marwan H. Khater, Christian Lavoie, Bin Yang, Zhen Zhang
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Patent number: 8367546Abstract: Novel low-resistivity tungsten film stack schemes and methods for depositing them are provided. The film stacks include a mixed tungsten/tungsten-containing compound (e.g., WC) layer as a base for deposition of tungsten nucleation and/or bulk layers. According to various embodiments, these tungsten rich layers may be used as barrier and/or adhesion layers in tungsten contact metallization and bitlines. Deposition of the tungsten-rich layers involves exposing the substrate to a halogen-free organometallic tungsten precursor. The mixed tungsten/tungsten carbide layer is a thin, low resistivity film with excellent adhesion and a good base for subsequent tungsten plug or line formation.Type: GrantFiled: October 18, 2011Date of Patent: February 5, 2013Assignee: Novellus Systems, Inc.Inventors: Raashina Humayun, Kaihan Ashtiani, Karl B. Levy
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Patent number: 8362585Abstract: A semiconductor junction barrier Schottky (JBS-SKY) diode with enforced upper contact structure (EUCS) is disclosed. Referencing an X-Y-Z coordinate, the JBS-SKY diode has semiconductor substrate (SCST) parallel to X-Y plane. Active device zone (ACDZ) atop SCST and having a JBS-SKY diode with Z-direction current flow. Peripheral guarding zone (PRGZ) atop SCST and surrounding the ACDZ. The ACDZ has active lower semiconductor structure (ALSS) and enforced active upper contact structure (EUCS) atop ALSS. The EUC has top contact metal (TPCM) extending downwards and in electrical conduction with bottom of EUCS; and embedded bottom supporting structure (EBSS) inside TPCM and made of a hard material, the EBSS extending downwards till bottom of the EUCS. Upon encountering bonding force onto TPCM during packaging of the JBS-SKY diode, the EBSS enforces the EUCS against an otherwise potential micro cracking of the TPCM degrading the leakage current of the JBS-SKY diode.Type: GrantFiled: July 15, 2011Date of Patent: January 29, 2013Assignee: Alpha & Omega Semiconductor, Inc.Inventors: Anup Bhalla, Ji Pan, Daniel Ng
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Patent number: 8349731Abstract: Embodiments of methods for forming Cu diffusion barriers for semiconductor interconnect structures are provided. The method includes oxidizing an exposed outer portion of a copper line that is disposed along a dielectric substrate to form a copper oxide layer. An oxide reducing metal is deposited onto the copper oxide layer. The copper oxide layer is reduced with at least a portion of the oxide reducing metal that oxidizes to form a metal oxide barrier layer. A dielectric cap is deposited over the metal oxide barrier layer.Type: GrantFiled: March 25, 2011Date of Patent: January 8, 2013Assignee: GLOBALFOUNDRIES, Inc.Inventor: Errol Todd Ryan
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Patent number: 8264056Abstract: A Schottky diode comprises an ohmic layer that can serve as a cathode and a metal layer that can serve as an anode, and a drift channel formed of semiconductor material that extends between the ohmic and metal layers. The drift channel includes a heavily doped region adjacent to the ohmic contact layer. The drift channel forms a Schottky barrier with the metal layer. A pinch-off mechanism is provided for pinching off the drift channel while the Schottky diode is reverse-biased. As a result, the level of saturation or leakage current between the metal layer and the ohmic contact layer under a reverse bias condition of the Schottky diode is reduced.Type: GrantFiled: July 29, 2010Date of Patent: September 11, 2012Assignee: Macronix International Co., Ltd.Inventors: Chung Yu Hung, Chih Min Hu, Wing Chor Chan, Jeng Gong
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Patent number: 8242499Abstract: A method of producing a semiconductor device includes the steps of preparing an SOQ (Silicon On Quartz) substrate in which a semiconductor layer is formed on a quartz substrate; forming a plurality of semiconductor device forming regions in the SOQ substrate; forming a crack inspection pattern in the SOQ substrate; inspecting the crack inspection pattern to detect a crack in the crack inspection pattern in a first inspection step; and inspecting the semiconductor device forming regions to detect a crack in the semiconductor device forming regions in a second inspection step when the crack is detected in the crack inspection pattern in the first inspection step.Type: GrantFiled: November 17, 2009Date of Patent: August 14, 2012Assignee: Oki Semiconductor Co., Ltd.Inventor: Toshio Nagata
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Patent number: 8237170Abstract: To provide a Schottky electrode in a diamond semiconductor, which has a good adhesion properties to diamonds, has a contacting surface which does not become peeled due to an irregularity in an external mechanical pressure, does not cause a reduction in yield in a diode forming process and does not cause deterioration in current-voltage characteristics, and a method of manufacturing the Schottky electrode. A Schottky electrode which includes: scattered island-form pattern Pt-group alloy thin films which are formed on a diamond surface formed on a substrate, in which the Pt-group alloy includes 50 to 99.9 mass % of Pt and 0.Type: GrantFiled: April 14, 2008Date of Patent: August 7, 2012Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Kazuhiro Ikeda, Hitoshi Umezawa, Shinichi Shikata
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Publication number: 20120193747Abstract: Disclosed are embodiments of a Schottky barrier diode. This diode can be formed in a semiconductor substrate having a doped region with a first conductivity type. A trench isolation structure can laterally surround a section of the doped region at the top surface of the substrate. A semiconductor layer can be positioned on the top surface of the substrate. This semiconductor layer can have a Schottky barrier portion over the defined section of the doped region and a guardring portion over the trench isolation structure laterally surrounding the Schottky barrier portion. The Schottky barrier portion can have the first conductivity type and the guarding portion can have a second conductivity type different from the first conductivity type. A metal silicide layer can overlie the semiconductor layer. Also disclosed are embodiments of a method of forming this Schottky barrier diode and of a design structure for the Schottky barrier diode.Type: ApplicationFiled: February 2, 2011Publication date: August 2, 2012Applicant: International Business Machines CorporationInventors: Robert M. Rassel, Mark E. Stidham
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Patent number: 8183660Abstract: A semiconductor component is proposed which has a semiconductor body having a first semiconductor zone of the first conduction type, at least one first rectifying junction with respect to the first semiconductor zone, at least one second rectifying junction with respect to the first semiconductor zone, wherein the three rectifying junctions each have a barrier height of different magnitude.Type: GrantFiled: February 26, 2008Date of Patent: May 22, 2012Assignee: Infineon Technologies AGInventors: Michael Rueb, Roland Rupp, Michael Treu
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Patent number: 8178940Abstract: An intermediate metal film is formed between a Schottky electrode and a pad electrode. A Schottky barrier height between the intermediate metal film and a silicon carbide epitaxial film is equivalent to or higher than a Schottky barrier height between the Schottky electrode and the silicon carbide epitaxial film. By this configuration, an excess current and a leak current through a pin-hole can be suppressed even in the case in which a Schottky barrier height between the pad electrode and the silicon carbide epitaxial film is less than the Schottky barrier height between the Schottky electrode and the silicon carbide epitaxial film.Type: GrantFiled: November 22, 2006Date of Patent: May 15, 2012Assignee: Central Research Institute of Electric Power IndustryInventors: Tomonori Nakamura, Hidekazu Tsuchida, Toshiyuki Miyanagi
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Patent number: 8154025Abstract: A CMOS device and method of fabrication are disclosed. The present invention utilizes Schottky barrier contacts for source and/or drain contact fabrication within the context of a CMOS device and CMOS integrated circuits, to eliminate the requirement for halo/pocket implants, shallow source/drain extensions to control short channel effects, well implant steps, and complex device isolation steps. Additionally, the present invention eliminates the parasitic bipolar gain associated with CMOS device operation, reduces manufacturing costs, tightens control of device performance parameters, and provides for superior device characteristics as compared to the prior art. The present invention, in one embodiment, uses a silicide exclusion mask process to form the dual silicide Schottky barrier source and/or drain contact for the complimentary PMOS and NMOS devices forming the CMOS device.Type: GrantFiled: September 18, 2009Date of Patent: April 10, 2012Assignee: Avolare 2, LLCInventors: John P. Snyder, John M. Larson
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Patent number: 8071482Abstract: A manufacturing method for a silicon carbide semiconductor device is disclosed. It includes an etching method in which an Al film and Ni film are laid on an SiC wafer in this order and wet-etched, whereby a two-layer etching mask is formed in which Ni film portions overhang Al film portions. Mesa grooves are formed by dry etching by using this etching mask.Type: GrantFiled: May 20, 2008Date of Patent: December 6, 2011Assignee: Fuji Electric Co., Ltd.Inventor: Yasuyuki Kawada
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Patent number: 8053365Abstract: Novel low-resistivity tungsten film stack schemes and methods for depositing them are provided. The film stacks include a mixed tungsten/tungsten-containing compound (e.g., WC) layer as a base for deposition of tungsten nucleation and/or bulk layers. According to various embodiments, these tungsten rich layers may be used as barrier and/or adhesion layers in tungsten contact metallization and bitlines. Deposition of the tungsten-rich layers involves exposing the substrate to a halogen-free organometallic tungsten precursor. The mixed tungsten/tungsten carbide layer is a thin, low resistivity film with excellent adhesion and a good base for subsequent tungsten plug or line formation.Type: GrantFiled: December 21, 2007Date of Patent: November 8, 2011Assignee: Novellus Systems, Inc.Inventors: Raashina Humayun, Kaihan Ashtiani, Karl B. Levy
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Patent number: 8039920Abstract: Methods and associated structures of forming a microelectronic structure are described. Those methods may comprise forming a conductive material in an interconnect opening within an interlayer dielectric material that is disposed on a substrate, forming a low density dielectric material on a surface of the dielectric layer and on a surface of the conductive material, and forming a high density dielectric barrier layer on the low density dielectric layer.Type: GrantFiled: November 17, 2010Date of Patent: October 18, 2011Assignee: Intel CorporationInventors: Sean W. King, Hui Jae Yoo
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Patent number: 8022482Abstract: A trenched semiconductor power device includes a trenched gate insulated by a gate insulation layer and surrounded by a source region encompassed in a body region above a drain region disposed on a bottom surface of a semiconductor substrate. The source region surrounding the trenched gate includes a metal of low barrier height to function as a Schottky source. The metal of low barrier height further may include a PtSi or ErSi layer. In a preferred embodiment, the metal of low barrier height further includes an ErSi layer. The metal of low barrier height further may be a metal silicide layer having the low barrier height. A top oxide layer is disposed under a silicon nitride spacer on top of the trenched gate for insulating the trenched gate from the source region. A source contact disposed in a trench opened into the body region for contacting a body-contact dopant region and covering with a conductive metal layer such as a Ti/TiN layer.Type: GrantFiled: February 14, 2006Date of Patent: September 20, 2011Assignee: Alpha & Omega Semiconductor, LtdInventors: Yongzhong Hu, Sung-Shan Tai
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Patent number: 7989329Abstract: A method and apparatus for removing excess dopant from a doped substrate is provided. In one embodiment, a substrate is doped by surfaced deposition of dopant followed by formation of a capping layer and thermal diffusion drive-in. A reactive etchant mixture is provided to the process chamber, with optional plasma, to etch away the capping layer and form volatile compounds by reacting with excess dopant. In another embodiment, a substrate is doped by energetic implantation of dopant. A reactive gas mixture is provided to the process chamber, with optional plasma, to remove excess dopant adsorbed on the surface and high-concentration dopant near the surface by reacting with the dopant to form volatile compounds. The reactive gas mixture may be provided during thermal treatment, or it may be provided before or after at temperatures different from the thermal treatment temperature. The volatile compounds are removed.Type: GrantFiled: December 21, 2007Date of Patent: August 2, 2011Assignee: Applied Materials, Inc.Inventors: Kartik Ramaswamy, Kenneth S. Collins, Biagio Gallo, Hiroji Hanawa, Majeed A. Foad, Martin A. Hilkene, Kartik Santhanam, Matthew D. Scotney-Castle
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Patent number: 7985615Abstract: The present invention relates to embodiments of TPV cell structures based on carbon nanotube and nanowire materials. One embodiment according to the present invention is a p-n junction carbon nanotube/nanowire TPV cell, which is formed by p-n junction wires. A second embodiment according to the present invention is a carbon nanotube/nanowire used as a p-type (or n-type), and using bulk material as the other complementary type to a form p-n junction TPV cell. A third embodiment according to the present invention uses a controllable Schottky barrier height between a one-dimensional nanowire and a metal contact to form the built-in potential of the TPV cells.Type: GrantFiled: November 20, 2006Date of Patent: July 26, 2011Assignee: The Regents of the University of CaliforniaInventors: Fei Liu, Ma Siguang, Kang L. Wang
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Patent number: 7981735Abstract: Provided are a Schottky barrier tunnel transistor and a method of manufacturing the same that are capable of minimizing leakage current caused by damage to a gate sidewall of the Schottky barrier tunnel transistor using a Schottky tunnel barrier naturally formed at a semiconductor-metal junction as a tunnel barrier. The method includes the steps of: forming a semiconductor channel layer on an insulating substrate; forming a dummy gate on the semiconductor channel layer; forming a source and a drain at both sides of the dummy gate on the insulating substrate; removing the dummy gate; forming an insulating layer on a sidewall from which the dummy gate is removed; and forming an actual gate in a space from which the dummy gate is removed. In manufacturing the Schottky barrier tunnel transistor using the dummy gate, it is possible to form a high-k dielectric gate insulating layer and a metal gate, and stable characteristics in silicidation of the metal layer having very strong reactivity can be obtained.Type: GrantFiled: May 4, 2009Date of Patent: July 19, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Yark Yeon Kim, Seong Jae Lee, Moon Gyu Jang, Chel Jong Choi, Myung Sim Jun, Byoung Chul Park
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Publication number: 20110169124Abstract: An electrical device in which an interface layer is disposed between and in contact with a metal and a Si-based semiconductor, the interface layer being of a thickness effective to depin of the Fermi level of the semiconductor while still permitting current to flow between the metal and the semiconductor. The interface layer may include a layer of a passivating material (e.g., made from nitrogen, oxygen, oxynitride, arsenic, hydrogen and/or fluorine) and sometimes also includes a separation layer. In some cases, the interface layer may be a monolayer of a semiconductor passivating material. The interface layer thickness corresponds to a minimum specific contact resistance of less than or equal to 10 ?-?m2 or even less than or equal to 1 ?-?m2 for the electrical device.Type: ApplicationFiled: February 7, 2011Publication date: July 14, 2011Inventors: Daniel E. Grupp, Daniel J. Connelly
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Controlled growth of a nanostructure on a substrate, and electron emission devices based on the same
Patent number: 7977761Abstract: The present invention provides for an array of nanostructures grown on a conducting substrate. The array of nanostructures as provided herein is suitable for manufacturing electronic devices such as an electron beam writer, and a field emission device.Type: GrantFiled: March 16, 2010Date of Patent: July 12, 2011Assignee: Smoltek ABInventor: Mohammad Shafiqul Kabir -
Publication number: 20110133251Abstract: Some exemplary embodiments of a semiconductor device using a III-nitride heterojunction and a novel Schottky structure and related method resulting in such a semiconductor device, suitable for high voltage circuit designs, have been disclosed. One exemplary structure comprises a first layer comprising a first III-nitride material, a second layer comprising a second III-nitride material forming a heterojunction with said first layer to generate a two dimensional electron gas (2DEG) within said first layer, an anode comprising at least a first metal section forming a Schottky contact on a surface of said second layer, a cathode forming an ohmic contact on said surface of said second layer, a field dielectric layer on said surface of said second layer for isolating said anode and said cathode, and an insulating material on said surface of said second layer and in contact with said anode.Type: ApplicationFiled: December 7, 2009Publication date: June 9, 2011Applicant: INTERNATIONAL RECTIFIER CORPORATIONInventor: Zhi He
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Patent number: 7944035Abstract: A semiconductor die has devices such as MOSgated devices, diodes and the like formed into the top and bottom surfaces of the die. One terminal of each of the devices terminal in the interior center of the die and a common contact is made to the interior center of the die at one edge of the die. Various packages for the die having a reduced foot print on a support substrate are disclosed.Type: GrantFiled: May 16, 2007Date of Patent: May 17, 2011Assignee: International Rectifier CorporationInventor: Igor Bol