Patents Examined by B. V. Keshavan
  • Patent number: 7005356
    Abstract: A schottky barrier transistor and a method of manufacturing the same are provided. The method includes forming a gate insulating layer and a gate on a substrate, forming a spacer on a sidewall of the gate, and growing a polycrystalline silicon layer and a monocrystalline silicon layer on the gate and the substrate, respectively, using a selective silicon growth. A metal is deposited on the polycrystalline silicon layer and the monocrystalline silicon layer. Then, the metal reacts with silicon of the polycrystalline silicon layer and the monocyrstalline silicon layer to form a self-aligned metal silicide layer. Therefore, selective wet etching for removing an unreacted metal after silicidation can be omitted. Furthermore, etching damage caused during the formation of the spacer can be decreased during the growth of the monocrystalline silicon layer, thereby improving the electrical characteristics of devices.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: February 28, 2006
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Woo Seok Cheong, Seong Jae Lee, Moon Gyu Jang
  • Patent number: 6921700
    Abstract: A transistor (10) overlies a substrate (12) and has a plurality of overlying channels (72, 74, 76) that are formed in a stacked arrangement. A continuous gate (60) material surrounds each of the channels. Each of the channels is coupled to source and drain electrodes (S/D) to provide increased channel surface area in a same area that a single channel structure is conventionally implemented. A vertical channel dimension between two regions of the gate (60) are controlled by a growth process as opposed to lithographical or spacer formation techniques. The gate is adjacent all sides of the multiple overlying channels. Each channel is formed by growth from a common seed layer and the source and drain electrodes and the channels are formed of a substantially homogenous crystal lattice.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: July 26, 2005
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Marius K. Orlowski, Leo Mathew
  • Patent number: 6919212
    Abstract: The present invention relates to a method for fabricating a ferroelectric random access memory (FeRAM) device. The method includes the steps of: forming a first inter-layer insulation layer on a substrate; forming a storage node contact connected with a partial portion of the substrate by passing through the first inter-layer insulation layer; forming a lower electrode connected to the storage node contact on the first inter-layer insulation layer; forming a second inter-layer insulation layer having a surface level lower than that of the lower electrode so that the second inter-layer insulation layer encompasses a bottom part of the lower electrode; forming an impurity diffusion barrier layer encompassing an upper part of the lower electrode on the second inter-layer insulation layer; forming a ferroelectric layer on the lower electrode and the impurity diffusion barrier layer; and forming a top electrode on the ferroelectric layer.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: July 19, 2005
    Assignee: Hynix Semiconductor Inc.
    Inventors: Sang-Hyun Oh, Kyu-Hyun Bang, In-Woo Jang, Jin-Yong Seong, Jin-Gu Kim, Song-Hee Park, Young-Ho Yang, Kye-Nam Lee, Suk-Kyoung Hong
  • Patent number: 6919284
    Abstract: A protective tape is applied to a surface of a wafer supported by a chuck table. A blade tip of a cutter unit is inserted into a groove formed in the chuck table circumferentially of the wafer, to cut the protective tape to have a larger diameter than the wafer. The wafer with the protective tape applied thereto undergoes a back grinding process. Subsequently, in a separating step, the protective tape is separated by means of a separating tape applied to the surface of protective tape.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: July 19, 2005
    Assignee: Nitto Denko Corporation
    Inventor: Masayuki Yamamoto
  • Patent number: 6908775
    Abstract: In an alignment or overlay measurement of patterns on a semiconductor wafer an error that occurs during the measurement in one of a predefined number of alignment structures in an exposure field of a corresponding predefined set of exposure fields can be handled by selecting an alignment structure in a substitute exposure field. The latter exposure field need not be part of the predefined set of exposure fields, that is, an inter-field change may be effected. The number of alignment measurements on a wafer remains constant and the quality is increased. Alternatively, when using another alignment structure in the same exposure field—by effecting an intra-field change—the method becomes particularly advantageous when different minimum structure sizes are considered for the substitute targets. Due to the different selectivity in, say, a previous CMP process, such targets might not erode and do not cause an error in a measurement, thus providing an increased alignment or overlay quality.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: June 21, 2005
    Assignee: Infineon Technologies AG
    Inventors: Rolf Heine, Sebastian Schmidt, Thorsten Schedel
  • Patent number: 6905922
    Abstract: A semiconductor device having a plurality of silicidation steps is provided. In the preferred embodiment in which the semiconductor device is a MOSFET, the source/drain regions are silicided. A dielectric layer is formed and the etch stop layer is removed from the gate electrode of the MOSFET. A second silicidation process is performed to silicide the gate electrode. The process may be performed individually for each transistor, allowing the electrical characteristics of each transistor to be determined individually.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: June 14, 2005
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chuan-Yi Lin, Yee-Chia Yeo
  • Patent number: 6903025
    Abstract: A method of purging a semiconductor manufacturing apparatus comprises a step of etching a CVD-deposited film deposited in a chamber constituting a semiconductor manufacturing apparatus which has performed a process of forming a CVD film using a CVD process over a semiconductor wafer by using an etching gas containing at least a halogen gas, and a step of purging a cleaning gas remaining in the chamber by causing a gas containing hydrogen to flow into the chamber after the step of etching the CVD-deposited film by using the cleaning gas.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: June 7, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Ichiro Mizushima
  • Patent number: 6894356
    Abstract: A static random access memory (SRAM) cell is given increased stability and latch-up immunity by fabricating the PMOS load transistors of the SRAM cell to have a very low drain/source dopant concentration. The drain/source regions of the PMOS load transistors are formed entirely by a P?? blanket implant. The PMOS load transistors are masked during subsequent implant steps, such that the drain/source regions of the PMOS load transistors do not receive additional P-type (or N-type) dopant. The P?? blanket implant results in PMOS load transistors having drain/source regions with dopant concentrations of 1e17 atoms/cm3 or less. The dopant concentration of the drain/source regions of the PMOS load transistors is significantly lower than the dopant concentration of lightly doped drain/source regions in PMOS transistors used in peripheral circuitry.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: May 17, 2005
    Assignee: Integrated Device Technology, Inc.
    Inventor: Jeong Yeol Choi
  • Patent number: 6875688
    Abstract: A method for implementing dual damascene processing includes forming a first hardmask layer over an interlevel dielectric layer, and forming a second hardmask layer over the first hardmask layer. A trench pattern is opened within a third hardmask layer formed over the second hardmask. A first etch process is implemented so as to define a via pattern completely through the second hardmask layer and partially through the first hardmask layer, and a second etch process is implemented to transfer the trench pattern and the via pattern into the interlevel dielectric layer.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: April 5, 2005
    Assignee: International Business Machines Corporation
    Inventors: William G. America, Kaushik A. Kumar
  • Patent number: 6869844
    Abstract: A structure for protecting an NROM from induced charge damage during device fabrication is described. The structure provides a discharge path for charge accumulated on the polygate layer during fabrication while providing sufficient isolation to ensure normal circuit operation.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: March 22, 2005
    Assignee: Advanced Micro Device, Inc.
    Inventors: Zhizheng Liu, Yider Wu, Jean Yee-Mei Yang
  • Patent number: 6828198
    Abstract: A method of forming gate electrode layer portions having differing widths comprising the following steps. A structure having a gate electrode layer and a hard mask layer thereover and including two or more active areas is provided. The hard mask layer is patterned to form two or more respective hard mask layer portions within the two or more active areas. One or more of the two or more respective hard mask layer portions is/are selectively trimmed to reduce its/their width to a second width leaving at least one the respective hard mask layer portions untrimmed. The gate electrode layer is then patterned.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: December 7, 2004
    Assignee: Taiwan Semiconductor Manufacturing Company
    Inventors: Hung-Der Su, Shien-Yang Wu, Yung-Shun Chen, Tung-Heng Shie, Yuan-Hung Chiu
  • Patent number: 6818498
    Abstract: On a substrate, there are provided a lower electrode, a capacitance insulating film, a passivation insulating film, and a first partial film of an upper electrode to be filled in a second aperture (capacitance determining aperture) formed in the passivation insulating film. The lower electrode, the capacitance insulating film, and the first partial film constitute a capacitance element. The upper electrode has the first partial film which is in contact with the capacitance insulating film and a second partial film which is not in contact with the capacitance insulating film. Since a second electrode wire consisting of a lower-layer film composed of titanium and an upper-layer film composed of an aluminum alloy film is in contact with the second partial film distinct from the first partial film of the upper electrode, titanium or the like encroaching from the second electrode wire can be prevented from diffusing into the capacitance insulating film.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: November 16, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takumi Mikawa, Yuji Judai, Yoshihisa Nagano
  • Patent number: 6803312
    Abstract: A method for fabricating a semiconductor device includes the steps of forming a mask on a predetermined layer, said mask having a first opening at a given side of the predetermined layer and a second opening that continues to and is smaller than the first opening, and forming a plating layer on the predetermined layer by using the mask.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: October 12, 2004
    Assignee: Fujitsu Quantum Devices Limited
    Inventor: Yutaka Sato
  • Patent number: 6803281
    Abstract: In a method of fabricating a semiconductor device having a MISFET of trench gate structure, a trench is formed from a major surface of a semiconductor layer of first conductivity type which serves as a drain region, in a depth direction of the semiconductor layer, a gate insulating film including a thermal oxide film and a deposited film is formed over the internal surface of the trench, and after a gate electrode has been formed in the trench, impurities are introduced into the semiconductor substrate of first conductivity type to form a semiconductor region of second conductivity type which serves as a channel forming region, and impurities are introduced into the semiconductor region of second conductivity type to form the semiconductor region of first conductivity type which serves as a source region.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: October 12, 2004
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Sumito Numazawa, Yoshito Nakazawa, Masayoshi Kobayashi, Satoshi Kudo, Yasuo Imai, Sakae Kubo, Takashi Shigematsu, Akihiro Ohnishi, Kozo Uesawa, Kentaro Oishi
  • Patent number: 6803259
    Abstract: A silicon controlled rectifier for SiGe process. The silicon controlled rectifier comprises a substrate, a buried layer of a first conductivity type in the substrate, a well of the first conductivity type in the substrate and above the buried layer, a doped region of a second conductivity type in the well, a first conducting layer of the second conductivity type on the substrate, and a second conducting layer of the first conductivity type on the first conducting layer.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: October 12, 2004
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventor: Jian-Hsing Lee
  • Patent number: 6790720
    Abstract: A method for fabricating a MOSFET is provided. The method comprises: providing a substrate, the substrate having a gate structure; forming a drain region and a source region in the substrate, the drain region and the source region being on two sides of the gate structure respectively; forming a metal suicide layer on the surface of the gate structure, the drain region, and the source region; forming a patterned block on the metal silicide layer above the gate structure, and forming a first dielectric layer above the substrate except the gate strcutre, the patterned block being formed above the center of the gate structure and the metal silicide layer above the gate structure beside two sides of the patterned block being exposed; removing a portion of the metal silicide layer and a portion of the gate structure by using the patterned block as a mask; and forming a drain extension region and a source extension region in the substrate, beside two sides of the remaining gate structure.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: September 14, 2004
    Assignee: Macronix International Co., Ltd.
    Inventor: Erh-Kun Lai
  • Patent number: 6773994
    Abstract: An architecture and process for forming CMOS vertical replacement gate metal oxide semiconductor field-effect transistors is disclosed. The integrated circuit structure includes a semiconductor area with a major surface formed along a plane and first and second source/drain dopes regions formed in the surface. An insulating trench is formed between the first and second source/drain regions. A third doped region forming a channel of a different conductivity type than the first source/drain region is positioned over the first source/drain region. A fourth doped region is formed over the second source/drain region, having an opposite conductivity type with respect to the second source/drain region, and forming a channel region. Fifth and sixth source/drain regions are formed respectively over the third and fourth doped regions.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: August 10, 2004
    Assignee: Agere Systems Inc.
    Inventors: Sailesh Chittipeddi, Michael James Kelly
  • Patent number: 6770971
    Abstract: A semiconductor device includes a semiconductor structure including a semiconductor substrate having an integrated circuit portion, and a plurality of connecting pads connected to the integrated circuit portion. A plurality of distributing lines are formed on the semiconductor structure, connected to the connecting pads, and have connecting pad portions. An encapsulating layer made of a resin is formed on the semiconductor structure and upper surface of the distributing lines. A copper oxide layer is formed on at least a surface of each of the distributing lines except for the connecting pad portion.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: August 3, 2004
    Assignee: Casio Computer Co., Ltd.
    Inventors: Ichiro Kouno, Osamu Okada
  • Patent number: 6759683
    Abstract: A composite Pt/Ti/WSi/Ni Ohmic contact has been fabricated by a physical deposition process which uses electron beam evaporation and dc-sputter deposition. The Ni based composite Ohmic contact on n-SiC is rapid thermally annealed (RTA) at 950° C. to 1000° C. for 30s to provide excellent current-voltage characteristics, an abrupt, void free contact-SiC interface, retention of the as-deposited contact layer width, smooth surface morphology and an absence of residual carbon within the contact layer and/or at the Ohmic contact-SiC interface. The annealed produced Ni2Si interfacial phase is responsible for the superior electrical integrity of the Ohmic contact to n-SiC. The effects of contact delamination due to stress associated with interfacial voiding has been eliminated. Wire bonding failure, non-uniform current flow and SiC polytype alteration due to extreme surface roughness have also been abolished.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: July 6, 2004
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Melanie W. Cole, Pooran C. Joshi
  • Patent number: 6743699
    Abstract: A plurality of semiconductor dice are provided on a substrate having a first side and a second side, with the semiconductor dice being spaced from one another by scribe line area. A stencil is positioned over at least one of the first side and the second side of the substrate. The stencil has masking sections which cover at least portions of the scribe line area. A polymer is applied through the positioned stencil onto the first or second side of the substrate over which the stencil is received, with the stencil substantially precluding the polymer from being applied on the covered portions of the scribe line area. After the applying, portions of the scribe line area are cut into and the plurality of dice are singulated from the substrate. Other aspects and implementations are contemplated.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: June 1, 2004
    Assignee: Micron Technology, Inc.
    Inventor: Trung Tri Doan