公开(公告)号：US20190140160A1

公开(公告)日：2019-05-09

申请号：US16079522

申请日：2017-02-24

Applicant: PIEZO STUDIO INC. ,  TOHOKU UNIVERSITY

Inventor： Akira YOSHIKAWA ,  Yuui YOKOTA ,  Yuji OHASHI ,  Kei KAMADA ,  Tetsuo KUDO ,  Kenji INOUE ,  Yasuhiro SHOJI ,  Yu IGARASHI ,  Mototaka ARAKAWA ,  Shunsuke KUROSAWA ,  Akihiro YAMAJI

IPC: H01L41/187 ,  C30B29/34 ,  C30B15/08 ,  C01B33/24 ,  C01B33/26 ,  H01L41/41

Abstract: The present invention makes clear and defines a congruent composition of a langasite-based oxide, and establishes a method of manufacturing a crystal by any desired composition of AE3ME1+a(Ga1-xAlx)3+bSi2+cO14 (AE is an alkaline-earth metal, ME is Nb or Ta, 0≤x≤1, −0.5

公开(公告)号：US20180226939A1

公开(公告)日：2018-08-09

申请号：US15750821

申请日：2016-07-25

Applicant: PIEZO STUDIO INC. ,  TOHOKU UNIVERSITY

Inventor： Kenji INOUE ,  Akira YOSHIKAWA ,  Yuji OHASHI ,  Yuui YOKOTA ,  Kei KAMADA ,  Shunsuke KUROSAWA

IPC: H03H3/04 ,  H03H9/13 ,  H03H9/17

Abstract: To improve the Q value of a piezoelectric thin-film element in a state in which unnecessary vibration is suppressed, an acoustic reflection film (104) is affixed to a first electrode (102), a piezoelectric single-crystal substrate (101) is thinned by polishing from the other surface (101b) of the piezoelectric single-crystal substrate (101), such that the first electrode (102) and piezoelectric thin film (105) are piled on the piezoelectric single-crystal substrate (101). In this polishing, a pressure (polishing pressure) to the surface (101b) during polishing in an electrode formation region where the first electrode (102) is formed differs from that in a non-electrode formation region around the electrode formation region. Consequently, the electrode formation region of the piezoelectric thin film (105), where the first electrode (102) is formed, is made thinner than the non-electrode formation region around the electrode formation region.

公开(公告)号：US20250093565A1

公开(公告)日：2025-03-20

申请号：US18292296

申请日：2022-07-01

Applicant: TOHOKU UNIVERSITY ,  C&A Corporation

Inventor： Akira YOSHIKAWA ,  Kei KAMADA ,  Ryuga YAJIMA ,  Rikito MIRAKAMI ,  Yasuhiro SHOJI

IPC: F21V8/00 ,  G01T1/20 ,  G02B1/04

Abstract: A core material (102) is contained in a cylindrical container (101) (first step). The container (101) is formed from a thermoplastic cladding material. The container (101) can be formed from a heat resistant glass such as a borosilicate glass, for example. The core material (102) is a halide having a lower melting point than the cladding material. Next, the container (101) containing the core material (102) is heated using a heater (151) and stretched, thereby forming an optical fiber emitter (105) comprising a core (103) formed from a halide crystal, and a cladding (104) formed from the cladding material.

公开(公告)号：US20210277504A1

公开(公告)日：2021-09-09

申请号：US16625385

申请日：2018-06-27

Applicant: C&A Corporation ,  TOHOKU UNIVERSITY

Inventor： Akira YOSHIKAWA ,  Rikito MURAKAMI ,  Yui YOKOTA ,  Takayuki NIHEI ,  Kei KAMADA ,  Yasuhiro SHOJI ,  Shunsuke KUROSAWA ,  Akihiro YAMAJI ,  Yuji OHASHI

IPC: C22C28/00 ,  B22D11/00 ,  B22D11/117

Abstract: A metal member according to this invention is composed of polycrystals of a metal made of ruthenium or an alloy containing ruthenium at a maximum ratio. The aspect ratio of a crystal grain of the polycrystalline metal member is 1.5 or more. A plurality of crystal grains forming the metal member are arranged with their major axes being pointed in the same direction, and the number of crystal grains in a section in the major axis direction of the crystal grains is 120 or less per 1 mm2.

公开(公告)号：US20180323366A1

公开(公告)日：2018-11-08

申请号：US15773157

申请日：2016-11-04

Applicant: PIEZO STUDIO INC. ,  TOHOKU UNIVERSITY

Inventor： Akira YOSHIKAWA ,  Yuji OHASHI ,  Yuui YOKOTA ,  Kei KAMADA ,  Masatoshi ITO ,  Kenji INOUE ,  Hiroyuki AMANO

IPC: H01L41/113 ,  H01L41/187 ,  H01L41/09 ,  H01L41/047

CPC classification number: H01L41/1132 ,  H01L41/0472 ,  H01L41/053 ,  H01L41/09 ,  H01L41/113 ,  H01L41/187 ,  H03H9/17

Abstract: To provide a vibrator made of a piezoelectric crystal having a larger electromechanical coupling coefficient and a more satisfactory frequency-temperature characteristic than those of quartz, a vibrating piece (101) is made of a Ca3Ta(Ga1-xAlx)3Si2O14 single crystal (0

公开(公告)号：US20250129450A1

公开(公告)日：2025-04-24

申请号：US18966564

申请日：2024-12-03

Applicant: TOHOKU UNIVERSITY ,  C&A Corporation

Inventor： Rikito MURAKAMI ,  Akira YOSHIKAWA ,  Kei KAMADA ,  Hiroaki YAMAGUCHI ,  Shiika ITOI ,  Yasuhiro SHOJI

IPC: C22C5/04 ,  H05B3/12 ,  H05B3/64

Abstract: This composition includes a Ru—Mo—W alloy having, in atomic %, a chemical composition including Mo: greater than 0% and 49% or less and W: greater than 0% and 45% or less, and the total content of Mo and W in the Ru—Mo—W alloy is greater than 30% and less than 50%.

公开(公告)号：US20180100101A1

公开(公告)日：2018-04-12

申请号：US15566199

申请日：2016-05-27

Applicant: TOHOKU UNIVERSITY ,  C&A CORPORATION

Inventor： Shunsuke KUROSAWA ,  Akira YOSHIKAWA ,  Kei KAMADA ,  Yuui YOKOTA ,  Yuji OHASHI ,  Takahiko HORIAI ,  Yasuhiro SHOJI ,  Rikito MURAKAMI

IPC: C09K11/77 ,  H01L27/146 ,  C01F17/00 ,  G01T1/202 ,  G01T1/20 ,  C30B29/22 ,  C30B15/00

CPC classification number: C09K11/7774 ,  C01F17/0043 ,  C09K11/00 ,  C30B15/00 ,  C30B29/22 ,  G01T1/161 ,  G01T1/20 ,  G01T1/2006 ,  G01T1/202 ,  G01T1/2023 ,  H01L27/14663 ,  H01L31/0232

Abstract: A crystal material that is represented by a general formula (1): (RExA1-x-y-sByM′s)2+α(Si1-t′M″t)2+βO7+γ (1), the crystal material having a pyrochlore type structure, being a nonstoichiometric composition, and being a congruent melting composition, wherein in Formula (1), A contains at least one or more selected from Gd, Y, La, Sc, Yb, and Lu; B contains at least one or more selected from La, Gd, Yb, Lu, Y, and Sc; 0.1≤y

公开(公告)号：US20150346360A1

公开(公告)日：2015-12-03

申请号：US14655666

申请日：2013-12-26

Applicant: TOHOKU UNIVERSITY

Inventor： Akira YOSHIKAWA ,  Shunsuke KUROSAWA ,  Yuui YOKOTA ,  Yasuhiro SHOJI ,  Akira SUZUKI ,  Toetsu SHISHIDO

IPC: G01T1/202 ,  C09K11/77

CPC classification number: G01T1/2023 ,  C09K11/7769 ,  C09K11/7774 ,  C09K11/7775 ,  C30B13/00 ,  C30B15/00 ,  C30B29/22 ,  C30B29/32 ,  C30B29/34 ,  G21K4/00

Abstract: A crystal material represented by a general formula (1): (Gd1-x-y-zLaxMEyREz)2MM2O7 (1), where ME is at least one selected from Y, Yb, Sc, and Lu; RE is Ce or Pr; MM is at least one selected from Si and Ge; and ranges of x, y, and z are represented by the following (i): (i) 0.0≦x+y+z

Abstract translation: 由通式（1）表示的结晶材料：（Gd1-x-y-zLaxMEyREz）2MM2O7（1），其中ME为选自Y，Yb，Sc和Lu中的至少一种; RE为Ce或Pr; MM是选自Si和Ge中的至少一种; 并且x，y和z的范围由以下（i）表示：（i）0.0＆nlE; x + y + z <1.0,0.05＆nlE; x + z <1.0,0.0＆amp; nlE; y <1.0和0.0001 ＆nlE; z <0.05（其中，当RE为Ce时，y = 0为例外）。

公开(公告)号：US20130206996A1

公开(公告)日：2013-08-15

申请号：US13760461

申请日：2013-02-06

Applicant: TOKUYAMA CORPORATION ,  NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY ,  TOHOKU UNIVERSITY

Inventor： Kenichi WATANABE ,  Yuya KAWABATA ,  Atsushi YAMAZAKI ,  Akira URITANI ,  Tetsuo IGUCHI ,  Kentaro FUKUDA ,  Noriaki KAWAGUCHI ,  Sumito ISHIZU ,  Akira YOSHIKAWA ,  Takayuki YANAGIDA

IPC: G01T3/06

CPC classification number: G01T3/06 ,  C09K11/7733 ,  C30B29/12

Abstract: Provided is a scintillation neutron detector capable of measuring neutrons with precision even under a high amount of γ rays as background noise and excellent in neutron counting precision, the scintillation neutron detector comprising a neutron scintillator crystal containing 6Li, and the crystal having a specific surface area of no less than 60 cm2/cm3.

Abstract translation: 本发明提供一种闪烁中子检测器，其能够即使在大量伽马射线下也能够精确地测量中子，作为背景噪声和中子计数精度优异，所述闪烁中子检测器包括含有6Li的中子闪烁体晶体，并且具有比表面积 不小于60cm 2 / cm 3。

公开(公告)号：US20130221227A1

公开(公告)日：2013-08-29

申请号：US13760471

申请日：2013-02-06

Applicant: TOKUYAMA CORPORATION ,  NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY ,  TOHOKU UNIVERSITY

Inventor： Kenichi WATANABE ,  Yoshihiko TAKAHASHI ,  Atsushi YAMAZAKI ,  Akira URITANI ,  Tetsuo IGUCHI ,  Kentaro FUKUDA ,  Noriaki KAWAGUCHI ,  Sumito ISHIZU ,  Akira YOSHIKAWA ,  Takayuki YANAGIDA

IPC: G01T3/06

CPC classification number: G01T3/06 ,  G01T1/2018

Abstract: Provided is a radiation detector with improved n/γ discrimination and usable even under high counting rate conditions with a reduced load on a signal-processing system. The detector capable of distinguishing neutron and gamma-ray events includes: a scintillator; an optical filter; a first photodetector to which a first part of light emitted from the scintillator is introduced via the optical filter; and a second photodetector to which a second part of light emitted from the scintillator is introduced not via the optical filter, wherein, for a set of two wavelengths A and (A+B) nm, the scintillator emits at least a light of A nm and a light of (A+B) nm when irradiated by gamma-ray, and emits a light of A nm and does not emit a light of (A+B) nm when irradiated by neutrons; and the optical filter blocks the light of A nm and transmits the light of (A+B) nm.

Abstract translation: 提供了一种具有改进的n /γ鉴别的辐射检测器，即使在高计数速率条件下，信号处理系统的负载减小。 能够区分中子和伽马射线事件的检测器包括：闪烁体; 滤光片; 第一光电检测器，经由滤光器引入从闪烁体发射的第一部分光; 以及第二光电检测器，其中从闪烁体发射的第二部分光不经由所述滤光器被引入所述第二光电检测器，其中，对于两组波长A和（A + B）nm，所述闪烁体至少发射出一个Anm 以及当用γ射线照射时（A + B）nm的光，并且发射Anm的光，并且当被中子照射时不发射（A + B）nm的光; 并且光学滤波器阻挡Anm的光并透射（A + B）nm的光。