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1. 发明专利

JPH0824259A NEEDLE-LIKE ULTRASONIC PROBE 失效
公开(公告)号：JPH0824259A
公开(公告)日：1996-01-30
申请号：JP16093294
申请日：1994-07-13
申请人： HITACHI LTD , HITACHI MEDICAL CORP , HITACHI CONSTRUCTION MACHINERY
发明人： YOKOZAWA KOICHI , SHINOMURA RYUICHI , ITO YUKIO , ISHIKAWA KIYOSHI , KANDA HIROSHI
IPC分类号： A61B8/12
摘要： PURPOSE:To obtain an ultrasonic probe which can pierce while a position to be observed is searched and wherein a transmitted or a pseudo-transmitted ultrasonic wave can be easily measured by arranging a pair of an ultrasonic convertor and an ultrasonic reflecting material or a pair of the first and the second ultrasonic convertors so as to face them in the direction being perpendicular to the axis of a puncture needle. CONSTITUTION:A plurality of pairs of thin film ultrasonic convertors 2 and 2' facing each other so as to placing the central axis between them are provided on the wall face of a hollow outer needle 10 and a low frequency ultrasonic convertor 3 for searching is also provided on the face in the axial direction of the apex part of a filled inner needle 20. Under a condition where apex positions of the inner needle 20 and the outer needle 10 are joined, a needle-like ultrasonic probe is pierced into the object to be examined and when the apex of the inner needle 20 reaches a site to be observed, it is stopped. Thereafter, when the outer needle 10 is pierced furthermore to an inner position to be observed, the tissue of living body at the position to be observed is introduced into the hollow outer needle 10 to result in a condition where this is placed up and down between a plurality of the facing pairs of the ultrasonic convertors. Under this condition, sound characteristics of the tissue of the living body introduced into the outer needle 10 are measured.

2. 发明专利

JPH01242687A PRODUCTION OF CERAMIC SCINTILLATOR 失效
公开(公告)号：JPH01242687A
公开(公告)日：1989-09-27
申请号：JP6744788
申请日：1988-03-23
申请人： HITACHI LTD , HITACHI MEDICAL CORP , HITACHI METALS LTD
发明人： ITO YUKIO , TAKEUCHI HIROYUKI , YAMADA TAKAMICHI , TODA AKIZO , TSUKUDA YASUO
IPC分类号： G01T1/20 , C04B35/64 , C04B35/645 , C09K11/00 , C09K11/08
摘要： PURPOSE:To produce a ceramic scintillator having a high luminescent power, a very small dispersion of power and excellent uniformity, by using a powder material having a specified particle diameter in sintering a rare earth oxysulfide powder by the HIP method. CONSTITUTION:In sintering a powder of a rare earth oxysulfide [e.g., a compound of the formula (wherein x is in the range of 3X10 , and the amount of F is 2-1000ppm)] by the hot isostatic press method (hereinbelow referred to as HIP), a powder of a mean particle diameter

3. 发明专利

JPH01261258A PRODUCTION OF CERAMIC SCINTILLATOR 失效
公开(公告)号：JPH01261258A
公开(公告)日：1989-10-18
申请号：JP8738488
申请日：1988-04-11
申请人： HITACHI LTD , HITACHI METALS LTD , HITACHI MEDICAL CORP
发明人： KANETOMO MASABUMI , IMAI KUNINORI , ITO YUKIO , TAKEUCHI HIROYUKI , YAMADA TAKAMICHI , TODA AKIZO , TSUKUDA YASUO
IPC分类号： C04B35/547 , C04B35/00 , C04B35/64
摘要： PURPOSE:To obtain a ceramic scintillator having high light-emission intensity, extremely low scattering of the intensity and excellent uniformity, by adopting a pressing mechanism with a hydrostatic press in the vacuum sealing step in the sintering of a rare-earth metal oxysulfide by HIP process. CONSTITUTION:A rare-earth metal oxysulfide 1 is vacuum-sealed in a metal capsule 2 and sintered under pressure. In the above process, the vacuum-sealing of the metal capsule is performed with a pressing mechanism without applying vibration to the metal capsule. A sealed part 9 can be formed at the tip end of a pipe 3 by using a hydraulic press 6 as a pressing means 7 and pressing the vacuum-sealing part 5 of the pipe 3 protruded from the metal capsule 2 with a cylindrical cemented carbide tip 8.

4. 发明专利

JPH01242686A PRODUCTION OF CERAMIC SCINTILLATOR 失效
公开(公告)号：JPH01242686A
公开(公告)日：1989-09-27
申请号：JP6744688
申请日：1988-03-23
申请人： HITACHI LTD , HITACHI METALS LTD , HITACHI MEDICAL CORP
发明人： ITO YUKIO , YOSHIDA MINORU , TAKEUCHI HIROYUKI , TODA AKIZO , YAMADA TAKAMICHI , TSUKUDA YASUO
IPC分类号： G01T1/20 , C04B35/64 , C04B35/645 , C09K11/00
摘要： PURPOSE:To make it possible to produce a high-quality crack-free ceramic scintillator, by using a metal having a coefficient of thermal expansion substantially equal to that of the sintered substance as the raw material for a metallic capsule in which the material is packed in sintering a rare earth oxysulfide by the HIP method. CONSTITUTION:In sintering a rare earth oxysulfide [e.g., a compound of the formula (wherein x is in the range of 3X10 , and the amount of F is 2-1000ppm)] by the hot isostatic press method (hereinbelow referred to as HIP), a metal having a coefficient of thermal expansion substantially equal to that of the sintered substance is used as the raw material for a metallic capsule in which the material is packed together with a sintering aid (e.g., Li2GeF6). For instance, iron-nickel steel is the most suitable for the rare earth oxysulfide of the above formula. By performing HIP by using this capsule, a crack-free ceramic scintillator can be made in good yields. Therefore, the ceramic scintillator obtained above is suitable as a material for a radiation-detecting element for X-ray CT.

5. 发明专利

JPH01242456A PRODUCTION OF RARE EARTH OXYSULFIDE SINTERED COMPACT 失效
公开(公告)号：JPH01242456A
公开(公告)日：1989-09-27
申请号：JP6744888
申请日：1988-03-23
申请人： HITACHI LTD , HITACHI MEDICAL CORP , HITACHI METALS LTD
发明人： TODA AKIZO , YAMADA TAKAMICHI , ITO YUKIO , IMAI KUNINORI , KANETOMO MASABUMI , KATO SHIGEO , TAKEUCHI HIROYUKI , TSUKUDA YASUO
IPC分类号： C04B35/547 , C04B35/00 , C04B35/64
摘要： PURPOSE:To produce the title sintered compact having luminous output with small scattering in a good yield by filling a specified substance together with rare earth oxysulfide powder in a metal capsule, by sealing after making vacuous and by heating and pressing. CONSTITUTION:In the production of rare earth oxysulfide (hereinafter referred to as Gd2O2S) sintered compact by filling Gd2O2S powder in the metal capsule, by sealing after making the capsule vacuous and by heating and pressing, the substance having higher vapor pressure of sulfur at >=500 deg.C than that of Gd2O2S (e.g., FeS2, CuS, Ag2S, PbS) is made to coexist in the capsule. Thereby, the decomposition of Gd2O2S at a high temp. is suppressed and the scattering of the characteristics of Gd2O2S sintered compact is remarkably decreased to obtain the sintered compact suitable as scintillator for X-ray CT.

6. 发明专利

JPH06105396A ULTRASONIC WAVE PROBE 失效
公开(公告)号：JPH06105396A
公开(公告)日：1994-04-15
申请号：JP25325792
申请日：1992-09-22
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SUGAWARA KAZUHIRO , ITO YUKIO
IPC分类号： A61B8/00 , G01N29/24 , H04R17/00
摘要： PURPOSE:To eliminate the leakage in a feeder line and to eliminate the noise at an ultrasonic wave frequency of 1MHz or over in the linear array probe. CONSTITUTION:Linear array use vibrators 1a-1f are arranged in parallel regularly on a printed circuit board 10. On the other hand, conductors 2a-2f for feeder line corresponding to each vibrator are arranged in parallel on a printed circuit board 20 regularly. The corresponding vibrators and conductors are connected by using a bonding wire 6 in the cross reference as 1a-2a, 1b-2b,..., A stray capacitance between adjacent conducting wires is generated and an electric interference is generated for this configuration. In order to prevent it, the conductors 3a-3e whose earthing is shared in common are provided between adjacent conducting wires.

7. 发明专利

JPH05316596A THIN FILM ARRAY ULTRASONIC WAVE TRANSDUCER AND ITS FORMING METHOD 失效
公开(公告)号：JPH05316596A
公开(公告)日：1993-11-26
申请号：JP11462892
申请日：1992-05-07
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： ITO YUKIO , KUSHIDA KEIKO
IPC分类号： H04R17/00 , H04R31/00
摘要： PURPOSE:To obtain an array element with a fine pitch by growing a zinc oxide with a low crystalline degree at a position corresponding to a groove forming part between array elements and to eliminate the need for an inter-element gap depending on the thickness of the element. CONSTITUTION:A gold/chromium film is formed on a plane of a sapphire substrate 11 as a lower electrode film 24. Then the gold and chromium are sequentially etched by using a prescribed resist pattern as a mask to remove the gold/chromium film at the position corresponding to the gap of the array element. Then a C axis orientation film 25 of zinc oxide is deposited on the removed part by using the high frequency magnetron sputtering method. Furthermore, a gold/chromium film is laminated on the zinc oxide film 25 as an upper electrode film 26. Then a photo resist pattern aligned with the lower electrode pattern is formed on the layer film and after the gold/chromium film is etched by using it as a mask, the zinc oxide film is etched by using a water solution whose major components are a nitric acid and a hydrochloric acid. Thus, the array element in which the groove 27 is completely cut off is obtained.

8. 发明专利

JPH05304699A 失效
公开(公告)号：JPH05304699A
公开(公告)日：1993-11-16
申请号：JP10745792
申请日：1992-04-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： ITO YUKIO , KUSHIDA KEIKO , KANDA HIROSHI
IPC分类号： H04R17/00
摘要： PURPOSE:To fine the pitch of elements and to improve electronic focusing performance and directivity by arranging an ultrasonic converter consisting of zinc oxide piezoelectric thin film on acoustic medium and providing a V-shaped groove shallower than the width of the thin film. CONSTITUTION:A silicon dioxide film 5 is formed on the lens section of a sapphire board being an acoustic medium 1 as an acoustic matching layer 5 and a lower electrode film 2 is formed on the plane opposite to the lens section. On the gold/chrome layer of the electrode film 2, a c-axis orientation film 3 made of the zinc oxide is accumulated, on which an upper electrode film 4 is accumulated. Further, the etching of the zinc oxide thin film 3 is performed by means of C-plane selection etchant mainly containing sulfuric fluid and hydrochloric acid to form array-shaped ultrasonic conversion elements 7a, 7b. Providing a V-shaped groove 6 on the thin film 3 expands the effective width of the elements 7a and 7b. Thereby fining the pitch of the elements 7a, 7b and improving the electronic focusing performance and directivity and the effectivity of using space of the converter 1.

9. 发明专利

JPH03242982A PIEZOELECTRIC THIN FILM ELEMENT 失效
公开(公告)号：JPH03242982A
公开(公告)日：1991-10-29
申请号：JP3823990
申请日：1990-02-21
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： ITO YUKIO , KUSHIDA KEIKO , ONOZATO AKIMASA , SUGAWARA KAZUHIRO
IPC分类号： H01L41/08 , H03H9/145
摘要： PURPOSE:To improve adhesive properties, mechanical strength in a boundary between a ZnO thin film and a lower electrode film by forming a lower electrode of a 3-layer metal thin film in a piezoelectric thin film element in which the lower electrode, a zinc oxide piezoelectric thin film and an upper electrode are laminated in this order on a substrate. CONSTITUTION:A C plate (0001 plate) of a sapphire (alpha-Al2O3) mirror-polished on its surface is employed as a substrate 1, and a Cr/Au/Cr layer lower electrode film is formed on the substrate 1 by a resistance heating depositing method. That is, after a Cr film 2 is deposited about 20Angstrom , an Au film 3 is laminated 1500Angstrom , a Cr' film 4 is further deposited 10Angstrom , and a ZnO thin film 5 is formed on the three-layer deposited film by a high frequency magnetron sputtering method. Thus, adhesive strength between the ZnO and the lower electrode can be improved without loss of a c-axis orientation of the film 5.

10. 发明专利

JPH04196800A THIN FILM ARRAY ULTRASONIC WAVE TRANSDUCER 失效
公开(公告)号：JPH04196800A
公开(公告)日：1992-07-16
申请号：JP32271290
申请日：1990-11-28
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： ITO YUKIO , KANDA HIROSHI , TAKEUCHI HIROYUKI
IPC分类号： H04R17/00
摘要： PURPOSE:To attain trimming of an electrode film of an element and to relieve a defective element when the defective element such as inter-electrode short- circuit by adopting split structure for the electrode film of an ultrasonic wave transducing element group to be divided into plural numbers. CONSTITUTION:The above transducer is provided with a sapphire (alpha-Al2O3) substrate 10, a lower electrode film 11, a zinc' oxide (ZnO) piezoelectric thin film 12, an upper electrode film 13, a bonding pad 14, and a silicon oxide (SiO2) acoustic matching film 15. Then the split structure is adopted for the lower electrode film 11 for each element to be split into plural numbers. Thus, an electrode corresponding to having a pin hole among electrodes split into plural numbers is trimmed. Thus, a defective element such as inter-electrode short- circuit is relieved and the yield of the thin film array ultrasonic wave transducer is improved.

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