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公开(公告)号:US20200234935A1
公开(公告)日:2020-07-23
申请号:US16634693
申请日:2018-05-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Takaaki NAGATA , Yoshihiro ISHIGAMI , Yasumasa HAMANA
Abstract: A transmissive photocathode includes a light transmitting substrate that has a first surface on which light is incident and a second surface which emits light incident from a side of the first surface, a photoelectric conversion layer that is provided on the second surface side of the light transmitting substrate and converts the light emitted from the second surface into photoelectrons, a light transmitting conductive layer that is provided between the light transmitting substrate and the photoelectric conversion layer and is composed of a single-layered graphene, and a thermal stress alleviation layer that is provided between the photoelectric conversion layer and the light transmitting conductive layer and has light transmissivity. A thermal expansion coefficient of the thermal stress alleviation layer is smaller than a thermal expansion coefficient of the photoelectric conversion layer and larger than a thermal expansion coefficient of the graphene.
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2.
公开(公告)号:US20190123254A1
公开(公告)日:2019-04-25
申请号:US16162656
申请日:2018-10-17
Applicant: KEIO UNIVERSITY , HAMAMATSU PHOTONICS K.K.
Inventor: Hideyuki MAKI , Motohiro SUYAMA , Takaaki NAGATA , Takeo FUJII
CPC classification number: H01L33/641 , H01L33/0054 , H01L33/36 , H01L33/40 , H01L2933/0016 , H01L2933/0075
Abstract: A light-emitting device according to one embodiment includes: a substrate; a graphite thin film disposed on the substrate; and an electrode provided on a second surface of the graphite thin film on an edge portion of the graphite thin film, the second surface of the graphite thin film being opposite from a first surface of the graphite thin film, the first surface of the graphite thin film opposed to the substrate. A plurality of protrusions for supporting the graphite thin film is formed on a surface of the substrate opposed to the graphite thin film, at least over an entire region where the substrate and a portion of the graphite thin film other than the edge portion overlap each other when viewed along a thickness direction of the substrate.
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公开(公告)号:US20180247802A1
公开(公告)日:2018-08-30
申请号:US15756217
申请日:2016-08-09
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Takaaki NAGATA , Yasumasa HAMANA , Hajime NISHIMURA , Kimitsugu NAKAMURA
CPC classification number: H01J43/246 , H01J9/125 , H01J43/24 , H01J2201/32
Abstract: A microchannel plate is provided with a substrate including a front surface, a rear surface, and a side surface, a plurality of channels penetrating from the front surface to the rear surface of the substrate, a first film provided on at least an inner wall surface of the channel, a second film provided on the first film, and electrode layers provided on the front surface and the rear surface of the substrate. The first film is made of Al2O3. The second film is made of SiO2. The first film is thicker than the second film.
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公开(公告)号:US20200027709A1
公开(公告)日:2020-01-23
申请号:US16489004
申请日:2018-01-23
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Takaaki NAGATA , Yasumasa HAMANA , Hajime NISHIMURA , Daichi MASUKO
IPC: H01J43/24
Abstract: A microchannel plate is provided with a substrate including a front surface, a rear surface, and a side surface, a plurality of channels penetrating from the front surface to the rear surface of the substrate, a first film provided on at least an inner wall surface of the channel, a second film provided on at least a part of the first film, and electrode layers provided on the front surface and the rear surface of the substrate. The first film is made of MgO, the second film is made of SiO2, and the second film is thinner than the first film.
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公开(公告)号:US20200020519A1
公开(公告)日:2020-01-16
申请号:US16507251
申请日:2019-07-10
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Takaaki NAGATA , Takeo FUJII , Motohiro SUYAMA
Abstract: A light-emitting device includes: a substrate having a groove extending in a first direction and a first surface and a second surface respectively arranged to sandwich the groove in a second direction; a first electrode provided on the first surface; a second electrode provided on the second surface; a graphite thin film provided on the first electrode and the second electrode and extending from the first electrode to the second electrode along the second direction in such a way as to be astride the groove; a third electrode provided on the graphite thin film in such a way as to be opposite the first electrode via the graphite thin film; and a fourth electrode provided on the graphite thin film in such a way as to be opposite the second electrode via the graphite thin film.
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6.
公开(公告)号:US20190088441A1
公开(公告)日:2019-03-21
申请号:US16131413
申请日:2018-09-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Motohiro SUYAMA , Takaaki NAGATA
IPC: H01J37/18 , H01J37/244 , H01J37/065 , H01J37/073
Abstract: An electron emission tube includes a housing in which an internal space is provided and which keeps the internal space in vacuum, an electron source that is arranged on a first end side in one direction of the housing and that generates an electron, a gate valve that is arranged on a second end side in the one direction of the housing and that can switch the second end side between an open state and a blocked state, and a partition part that is placed between the electron source and the gate valve and that divides the internal space into a first region including the electron source and a second region including the gate valve. The partition part includes an electron-permeable membrane that transmits an electron.
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公开(公告)号:US20160233044A1
公开(公告)日:2016-08-11
申请号:US15029336
申请日:2014-08-08
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor: Takaaki NAGATA , Yasumasa HAMANA , Kimitsugu NAKAMURA
Abstract: A transmission mode photocathode comprises: an optically transparent substrate having an outside face to which light is incident, and an inside face from which the light incident to the outside face side is output; a photoelectric conversion layer disposed on the inside face side of the optically transparent substrate and configured to convert the light output from the inside face into a photoelectron or photoelectrons; and an optically-transparent electroconductive layer comprising graphene, and disposed between the optically transparent substrate and the photoelectric conversion layer.
Abstract translation: 透射模式光电阴极包括:具有入射光的外表面的光学透明基板和入射到外表面侧的光的内表面; 光电转换层,设置在所述光学透明基板的内表面侧,并且被配置为将从所述内表面输出的光转换为光电子或光电子; 以及包含石墨烯的光学透明导电层,并设置在光学透明基板和光电转换层之间。
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