Patents by Inventor Naoki Kasai
Naoki Kasai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240369623Abstract: The wafer test system includes: a prober including a chuck that holds a semiconductor wafer and a probe card having probe needles thereon, and brings the probe needles in contact with semiconductor chips formed on the semiconductor wafer to inspect the semiconductor chips; an overhead hoist transport that delivers the cassette that houses the plurality of semiconductor wafers to be inspected to the prober and withdraws, from the prober, the cassette that houses the semiconductor wafers that have been inspected; a conveying control unit that controls the overhead hoist transport to convey the probe card between a replacement position of the probe card predetermined in the prober and a storage of the probe card located in a place different from the prober; and a card conveying mechanism that conveys the probe card between a holding position in the prober and the replacement position.Type: ApplicationFiled: July 16, 2024Publication date: November 7, 2024Applicant: Tokyo Seimitsu Co., Ltd.Inventors: Akira YAMAGUCHI, Yuta SATO, Naoki KASAI, Naoyuki YAMAZOE, Tetsuya YASUNAKA, Kazuma TAKII, Teppei AOKI, Wataru KAWASAKI, Hiroki ISHIDA, Yasuhito IGUCHI
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Publication number: 20170262044Abstract: An information processing apparatus according to the present invention includes: a detection unit that detects detection information that is information indicating an external state of the apparatus; a communication unit that receives reception information that is a determination result given by another apparatus; and a control unit that calculates a first determination result that is a result acquired by determining a state of a surrounding of the apparatus based on the detection information and the reception information, transmits the first determination result to the another apparatus via the communication unit, and activates a necessary function for the detection unit or the communication unit and stops an unnecessary function thereof.Type: ApplicationFiled: September 7, 2015Publication date: September 14, 2017Applicant: NEC CorporationInventors: Takashi TAKENAKA, Shuichi TAHARA, Kenichi OYAMA, Nobuharu KAMI, Hiroto SUGAHARA, Noboru SAKIMURA, Kosuke NISHIHARA, Naoki KASAI
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Patent number: 7848137Abstract: An MRAM according to the present invention is provided with a magnetic recording layer being a ferromagnetic layer and a pinned layer connected to the magnetic recording layer through a nonmagnetic layer. The magnetic recording layer includes a magnetization switching region, a first magnetization fixed region and a second magnetization fixed region. The magnetization switching region has reversible magnetization and overlaps with the pinned layer. The first magnetization fixed region and the second magnetization fixed region are both connected to the same one end of the magnetization switching region. Also, the first magnetization fixed region and the second magnetization fixed region respectively have first fixed magnetization and second fixed magnetization whose directions are fixed. One of the first fixed magnetization and the second fixed magnetization is fixed in a direction toward the above-mentioned one end, and the other is fixed in a direction away from the above-mentioned one end.Type: GrantFiled: March 20, 2007Date of Patent: December 7, 2010Assignee: NEC CorporationInventors: Shunsuke Fukami, Naoki Kasai
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Publication number: 20090251955Abstract: An MRAM according to the present invention is provided with a magnetic recording layer being a ferromagnetic layer and a pinned layer connected to the magnetic recording layer through a nonmagnetic layer. The magnetic recording layer includes a magnetization switching region, a first magnetization fixed region and a second magnetization fixed region. The magnetization switching region has reversible magnetization and overlaps with the pinned layer. The first magnetization fixed region and the second magnetization fixed region are both connected to the same one end of the magnetization switching region. Also, the first magnetization fixed region and the second magnetization fixed region respectively have first fixed magnetization and second fixed magnetization whose directions are fixed. One of the first fixed magnetization and the second fixed magnetization is fixed in a direction toward the above-mentioned one end, and the other is fixed in a direction away from the above-mentioned one end.Type: ApplicationFiled: March 20, 2007Publication date: October 8, 2009Applicant: NEC CorporationInventors: Shunsuke Fukami, Naoki Kasai
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Publication number: 20060049430Abstract: An objective of this invention is to improve an ON-state current of a field-effect transistor. For this purpose, on a single-crystal silicon substrate 101 having a {100} plane as a principal surface are formed a gate electrode 107 extending substantially in a <010> crystal axis direction of the single-crystal silicon or an axis direction equivalent to the <010> crystal axis direction, and in both sides of the gate electrode 107, source/drain regions 129 on the surface of the single-crystal silicon substrate 101. On the surface of the single-crystal silicon substrate 101 in a region directly below the gate electrode 107 are formed a principal surface and an inclined surface 133 oblique to the principal surface along the extension direction of the gate electrode 107.Type: ApplicationFiled: August 22, 2005Publication date: March 9, 2006Applicants: NEC ELECTRONICS CORPORATION, NEC CORPORATIONInventors: Naoki Kasai, Yasushi Nakahara, Hiroshi Kimura, Toshinori Fukai
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Patent number: 6768151Abstract: In a method of manufacturing a semiconductor memory device, a lower electrode film is formed on a semiconductor substrate via an interlayer insulating film. A ferroelectric film is formed on the lower electrode layer while heating the lower electrode layer uniformly in the cell array region. An upper electrode film is formed on the ferroelectric film. Ferroelectric capacitors are formed in a memory cell array region. Each of the ferroelectric capacitors includes the lower electrode film, the ferroelectric film and the upper electrode film.Type: GrantFiled: January 17, 2003Date of Patent: July 27, 2004Assignee: NEC CorporationInventor: Naoki Kasai
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Patent number: 6653690Abstract: It is a purpose of the invention to provide a semiconductor device comprising a high density integrated circuit having a large number of insulated gate field effect transistors having minute size and improved performance and uniformity. The source contact resistance is set in a value smaller than that of the drain contact resistance by making the diameter of a source contact of an insulated gate field effect transistor larger than that of the drain contact, so as to improve the current driving capability of the transistor and to reduce the variation in the capability.Type: GrantFiled: March 30, 1998Date of Patent: November 25, 2003Assignee: NEC Electronics CorporationInventor: Naoki Kasai
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Publication number: 20030104674Abstract: In a method of manufacturing a semiconductor memory device, a lower electrode film is formed on a semiconductor substrate via an interlayer insulating film. A ferroelectric film is formed on the lower electrode layer while heating the lower electrode layer uniformly in the cell array region. An upper electrode film is formed on the ferroelectric film. Ferroelectric capacitors are formed in a memory cell array region. Each of the ferroelectric capacitors includes the lower electrode film, the ferroelectric film and the upper electrode film.Type: ApplicationFiled: January 17, 2003Publication date: June 5, 2003Applicant: NEC CORPORATIONInventor: Naoki Kasai
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Publication number: 20020173111Abstract: In a method of manufacturing a semiconductor memory device, a lower electrode film is formed on a semiconductor substrate via an interlayer insulating film. A ferroelectric film is formed on the lower electrode layer while heating the lower electrode layer uniformly in the cell array region. An upper electrode film is formed on the ferroelectric film. Ferroelectric capacitors are formed in a memory cell array region. Each of the ferroelectric capacitors includes the lower electrode film, the ferroelectric film and the upper electrode film.Type: ApplicationFiled: May 7, 2002Publication date: November 21, 2002Applicant: NEC CORPORATIONInventor: Naoki Kasai
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Patent number: 6465826Abstract: An embedded LSI includes a FeRAM macro block and an associated logic circuit section. A hydrogen barrier layer covers the FeRAM macro block as a whole and exposes the logic circuit section. The edge of the hydrogen barrier layer overlies the peripheral circuit of the FeRAM macro block and the boundary separating the FeRAM macro block from the logic circuit section. The ferroelectric capacitor is protected by the hydrogen barrier layer against hydrogen during a hydrogen-annealing process.Type: GrantFiled: January 2, 2001Date of Patent: October 15, 2002Assignee: NEC CorporationInventor: Naoki Kasai
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Patent number: 6448597Abstract: A DRAM includes a MOSFET and a stacked capacitor in each memory cell. The stacked capacitor includes a bottom electrode substantially of a cylindrical shape, a top electrode received in the cylindrical-shape bottom electrode, and a capacitor dielectric film for insulation therebetween. The cylindrical shape of the bottom electrode allows a larger deviation for alignment between the capacitor and the capacitor contact.Type: GrantFiled: August 25, 1999Date of Patent: September 10, 2002Assignee: NEC CorporationInventors: Naoki Kasai, Toshihiro Iizuka
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Publication number: 20020056919Abstract: The present invention also provides a multilevel interconnection structure comprising: at least a set of a first lower level contact plug extending in a lower level inter-layer insulator structure and a first higher level contact plug extending in a higher level inter-layer insulator structure extending over the lower level inter-layer insulator structure, wherein a top of the first lower level contact plug is contact directly with a bottom of the first higher level contact plug without intervening any interconnection pad; a stopper insulating film extending between the lower level inter-layer insulator structure and the higher level inter-layer insulator structure; and at least a lower-level single conductive united structure which further comprises: a second lower level contact plug extending in the lower level inter-layer insulator structure; and a first lower level interconnection extending in a lower-level interconnection groove formed in an upper region of the lower level inter-layer insulator structureType: ApplicationFiled: January 9, 2002Publication date: May 16, 2002Applicant: NEC CORPORATIONInventor: Naoki Kasai
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Patent number: 6352891Abstract: The method of manufacturing a semiconductor device having a first and second semiconductor element formation regions. The second gate electrode is of a second semiconductor element formation region while the first semiconductor element formation region is masked. The second source/drain region is a of the second semiconductor element and is formed in the second semiconductor element formation region while the first semiconductor element formation region is masked. The second sidewall insulating film are formed on side portions of the second gate electrode while the first semiconductor element formation regions is masked. The first gate electrode is of a first semiconductor element and is formed in the first semiconductor element formation region while the second semiconductor element formation region is masked. The first source/drain region is of the first semiconductor element and is formed in the first semiconductor element formation region while the second semiconductor element formation region is masked.Type: GrantFiled: December 17, 1999Date of Patent: March 5, 2002Assignee: NEC CorporationInventor: Naoki Kasai
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Patent number: 6348408Abstract: The present invention also provides a multilevel interconnection structure comprising: at least a set of a first lower level contact plug extending in a lower level inter-layer insulator structure and a first higher level contact plug extending in a higher level inter-layer insulator structure extending over the lower level inter-layer insulator structure, wherein a top of the first lower level contact plug is contact directly with a bottom of the first higher level contact plug without intervening any interconnection pad; a stopper insulating film extending between the lower level inter-layer insulator structure and the higher level inter-layer insulator structure; and at least a lower-level single conductive united structure which further comprises: a second lower level contact plug extending in the lower level inter-layer insulator structure; and a first lower level interconnection extending in a lower-level interconnection groove formed in an upper region of the lower level inter-layer insulator structureType: GrantFiled: November 2, 2000Date of Patent: February 19, 2002Assignee: NEC CorporationInventor: Naoki Kasai
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Patent number: 6300647Abstract: A device for capacitor characteristic evaluation is provided, which enables measurement of the characteristic of a capacitor immediately after the completion of its formation processes, and which improves the fabrication yield.Type: GrantFiled: December 21, 1999Date of Patent: October 9, 2001Assignee: NEC CorporationInventors: Takehiko Hamada, Naoki Kasai
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Publication number: 20010020708Abstract: An embedded LSI includes a FeRAM macro block and an associated logic circuit section. A hydrogen barrier layer covers the FeRAM macro block as a whole and exposes the logic circuit section. The edge of the hydrogen barrier layer overlies the peripheral circuit of the FeRAM macro block and the boundary separating the FeRAM macro block from the logic circuit section. The ferroelectric capacitor is protected by the hydrogen barrier layer against hydrogen during a hydrogen-annealing process.Type: ApplicationFiled: January 2, 2001Publication date: September 13, 2001Inventor: Naoki Kasai
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Patent number: 6255218Abstract: A semiconductor device that enables to avoid short-circuit between an interconnection film and an underlying conductive region even when a contact hole is partially overlapped with an isolation insulator. A conductive region is selectively formed in an active region to be contacted therewith. An interlayer insulating film having a contact hole is formed to cover the active region and the isolation insulator. An interconnection film is formed on the interlayer insulator film to be contacted with the conductive region through the contact hole. The isolation region contains a first insulating subregion and a second insulating subregion formed on the first insulating subregion. The first insulating subregion is positioned at a deeper level than that of the second insulating subregion. The second insulating subregion may be formed in self-alignment to the first insulating subregion and may have a substantially flat surface.Type: GrantFiled: September 1, 1999Date of Patent: July 3, 2001Assignee: NEC CorporationInventor: Naoki Kasai
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Patent number: 6235575Abstract: A gate electrode 5 is provided on a surface of a semiconductor substrate 1, an insulation film 6 being formed over the gate electrode 5 and the side wall of the gate electrode 5 being covered by an insulation film 8, and, on a diffusion region 7 that is formed on the surface of the semiconductor substrate 1 at both sides of the above-noted gate electrode 5 and in a region that is sandwiched between the above-noted side walls 8, 8, a silicon single crystal is anisotropically grown in a direction that is perpendicular with respect to the semiconductor substrate 1, so as to form a pad 9, and the anisotropic growth of the silicon single crystal is only within a part 8a of the region sandwiched between parts of the side wall 8 that are perpendicular to the substrate surface.Type: GrantFiled: May 4, 1999Date of Patent: May 22, 2001Assignee: NEC CorporationInventors: Naoki Kasai, Hiroki Koga
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Patent number: 6218197Abstract: An embedded LSI includes a FeRAM macro block and an associated logic circuit section. A hydrogen barrier layer covers the FeRAM macro block as a whole and exposes the logic circuit section. The edge of the hydrogen barrier layer overlies the peripheral circuit of the FeRAM macro block and the boundary separating the FeRAM macro block from the logic circuit section. The ferroelectric capacitor is protected by the hydrogen barrier layer against hydrogen during a hydrogen-annealing process.Type: GrantFiled: June 29, 2000Date of Patent: April 17, 2001Assignee: NEC CorporationInventor: Naoki Kasai
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Patent number: 6190987Abstract: A semiconductor device includes a first diffusion layer, an insulating film, and an electrode. The first diffusion layer is formed on the surface of a first-conductivity-type semiconductor substrate and has an opposite conductivity type. The insulating film is formed on the first diffusion layer. The electrode is made of a conductor layer formed on the insulating film. The width of the electrode is smaller than a value twice the length by which an impurity doped into the surface of the semiconductor substrate, using the electrode as a mask, laterally diffuses during annealing to a position immediately below the electrode.Type: GrantFiled: February 9, 1999Date of Patent: February 20, 2001Assignee: NEC CorporationInventors: Naoki Kasai, Hiroki Koga