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1. 发明专利

GB2210226B ELECTRODE OF SURFACE ACOUSTIC WAVE DEVICE AND ACOUSTIC WAVE DEVICE INCLUDING SUCH ELECTRODE 未知
公开(公告)号：GB2210226B
公开(公告)日：1991-10-30
申请号：GB8822055
申请日：1988-09-20
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , HIKITA MITSUTAKA , KUROSAWA KAZUHITO , SUMIOKA ATSUSHI
IPC分类号： H03H9/145 , H03H3/08 , H03H9/25
摘要： A surface acoustic wave device has its inter-digital transducers made of a 3-metal alloyed material consisting of aluminum, copper and magnesium.

2. 发明专利

GB2210226A SURFACE ACOUSTIC WAVE DEVICE 未知
公开(公告)号：GB2210226A
公开(公告)日：1989-06-01
申请号：GB8822055
申请日：1988-09-20
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , HIKITA MITSUTAKA , KUROSAWA KAZUHITO , SUMIOKA ATSUSHI
IPC分类号： H03H9/145 , H03H3/08 , H03H9/25
摘要： A surface acoustic wave device has its inter-digital transducers made of a 3-metal alloyed material consisting of aluminum, copper and magnesium.

3. 发明专利

JPS6480113A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPS6480113A
公开(公告)日：1989-03-27
申请号：JP23618987
申请日：1987-09-22
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , HIKITA MITSUTAKA , KUROSAWA KAZUHITO , SUMIOKA JUNJI
IPC分类号： H03H9/145 , H03H3/08 , H03H9/25
摘要： PURPOSE:To improve power resistance and to prolong service life by using an Al-Cu-Mg ternary alloy for a thin film strip. CONSTITUTION:A thin film stripe is made of aluminum-copper-magnesium ternary alloy in a surface acoustic wave device having the thin film stripe on a substrate on which a surface acoustic wave is propagated. In case of applying the titled device to a 3-transducer type SAW(surface acoustic wave) filter, an IDT(interdigital transducer) 2 is made of the thin film stripe 3 formed of the Ag-Cu-Mg ternary alloy on the piezoelectric substrate 1. In this case, a ternary alloy where the dope amount of Cu is 0.1-2.5wt.% and the dope amount of Mg is 0.1-1.4wt.% is preferred depending on the power given to the SAW filter and the required service life in this case and other ternary alloy where the dope amount of Cu is 1.8-2.2wt.% and the dope amount of Mg is 0.5-1.4wt.% is much preferred.

4. 发明专利

JPS6478511A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPS6478511A
公开(公告)日：1989-03-24
申请号：JP23482087
申请日：1987-09-21
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , HIKITA MITSUTAKA , KUROSAWA KAZUHITO , SUMIOKA JUNJI
IPC分类号： H03H9/25 , H03H3/08 , H03H9/145
摘要： PURPOSE:To obtain a SAW filter transducer electrode material with lower resistivity than that of aluminum by using a superconduction thin film as a transducer electrode material of the SAW filter. CONSTITUTION:The surface acoustic wave SAW filter consists of a piezoelectric substance 1-1, an interdigital transducer 1-2, a stripe 103, a lead wire 1-4 and terminals 1-5, 1-6. The stripe 103 constitutes an IDT 102 and the type of material is superconduction ceramic thin film. Thus, the electric resistance of the IDT electrode of the SAW filter is made principally zero. Then the insertion loss of the SAW filter is considerably reduced than the case with using aluminum.

5. 发明专利

JPS6471206A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPS6471206A
公开(公告)日：1989-03-16
申请号：JP22631087
申请日：1987-09-11
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , HIKITA MITSUTAKA , KUROSAWA KAZUHITO , SUMIOKA JUNJI
IPC分类号： H03H9/25 , H03H3/08 , H03H9/145
摘要： PURPOSE:To obtain a SAW filter transducer electrode material having a resistivity lower than that of aluminum by using a superconductor thin film as a transducer electrode material for a surface acoustic wave (SAW) filter. CONSTITUTION:The titled device consists of a three-transducer SAW filter, a piezoelectric substrate 1-1, an interdigital transducer (IDT) 1-2, a lead wire 1-4, and terminals 1-5, 1-6. The IDT 1-2 consists of a stripe 1-3 made of a superconductor ceramic two-layer thin film. Through the constitution above, the electric resistance of the IDT electrode of the SAW filter is made principally zero. Thus, the insertion loss of the SAW filter is reduced more than that in using an Al electrode. Since the critical current density is improved by using a two-layer film or a multi-layer film having >=2 layers, the SAW filter with excellent power resistance is obtained.

6. 发明授权

US3584220A Optical communication system 失效
标题翻译：光通信系统
公开(公告)号：US3584220A
公开(公告)日：1971-06-08
申请号：US3584220D
申请日：1967-04-07
申请人： HITACHI LTD
发明人： NOMURA SADAO , KOJIMA HIROOMI , SAKANOUE AKIRA , OGURA IWAO , SEKIYA MICHIO
IPC分类号： G02F2/00 , H04B10/26 , H04B9/00
CPC分类号： H04B10/2587 , G02F2/00
摘要： An optical communication system for use in simultaneous communication between two separate stations A and B, designed so that the light source of the carrier is provided only in one of the stations and means are provided so that the message issued from Station A is derived at Station B from a portion of the carrier light beam received at Station B while the message of Station B is transmitted to Station A on the remainder of the carrier light beam which is returned therefrom to Station A.

7. 发明专利

DE2546049A1 未知
公开(公告)号：DE2546049A1
公开(公告)日：1976-04-22
申请号：DE2546049
申请日：1975-10-14
申请人： HITACHI LTD
发明人： KOJIMA HIROOMI , ZAMA HIDEO , NOMURA SADAO , TABUCHI TOYOJI , MURATA RYOZO
IPC分类号： G02F1/135 , G09G3/36 , G09F9/30
摘要： A liquid crystal display panel is composed of a plate of ferroelectric material, a group of electrodes arranged in a first direction on one surface of the plate, a second group of electrodes arranged in a second direction orthogonal to the first direction on a second surface of the plate, dielectric films disposed on the first group of electrodes, intermediate electrodes the main part of which is situated on each of the dielectric films and the side part of which is situated on a second surface of the plate opposite each of the second group of electrodes. A transparent substrate is arranged opposite the second surface of the plate, a third group of electrodes are arranged on the transparent substrate opposite and parallel to each of the second group of electrodes and means is provided for connecting each of the second group of electrodes to each of the third group of electrodes which is opposite to the former, and a liquid crystal is interposed between the transparent substrate and the plate.

8. 发明授权

US3667828A Digital light deflector 失效
标题翻译：数码灯偏光器
公开(公告)号：US3667828A
公开(公告)日：1972-06-06
申请号：US3667828D
申请日：1970-06-12
申请人： HITACHI LTD
发明人： KOJIMA HIROOMI , NOMURA SADAO , KUMADA AKIO
IPC分类号： G02F1/31 , G02F1/20
CPC分类号： G02F1/31
摘要： A DIGITAL LIGHT DEFLECTOR COMPRISING A CASCADE ARRANGEMENTS OF N STAGES OF A QUARTER-WAVE IRREGULAR FERROELECTRIC CRYSTAL AND A UNIT CONSTITUTED BY A UNIAXIAL BIREFRINGENT CRYSTAL CUT AT ITS OPPOSITE SURFACES WITH A SECIFIED ANGLE TO AN OPTIC AXIS THEREOF AND A QUARTER-WAVE PLATE, OPPOSITE Z SURFACES OF SAID IRREGULAR FERROELECTRIC CRYSTAL BEING PROVIDED WITH AN ELECTRICAL MEANS FOR APPLY AN ELEC-

TRIC FIELD AT LEAST EQUAL TO THE COERCIVE FIELD OF SAID CRYSTAL, IF NECESSARY, TO DEFLECT THE LIGHT BEING TRANSMITTED THROUGH SAID UNIT.

9. 发明授权

US3658409A Digital light deflector 失效
标题翻译：数码灯偏光器
公开(公告)号：US3658409A
公开(公告)日：1972-04-25
申请号：US3658409D
申请日：1970-07-01
申请人： HITACHI LTD
发明人： SHIMBO CHIAKI , KOJIMA HIROOMI , SEKIYA MICHIO , TAKEYASU KIYOO , NOMURA SADAO
IPC分类号： G02F1/31 , G02F1/26
CPC分类号： G02F1/31
摘要： Electro-optic crystal elements and uniaxial birefringent crystals are alternately aligned together and an additional electro-optic crystal element followed by a polarizing plate is further aligned with the last stage birefringent crystal. Each of the electro-optic crystal elements has opposite faces provided thereon with transparent electrodes to which a half-wavelength voltage is selectively applied whereby undesired light components are shut off by the polarizing plate to thereby improve S/N (signal to noise) ratio.
摘要翻译：电光晶体元件和单轴双折射晶体交替排列在一起，并且附加的电光晶体元件和偏振片之间进一步与最后一级的双折射晶体对准。每个电光晶体元件具有设置在其上的透明电极的相对表面，其中选择性地施加半波长电压，由此由偏振板切断不期望的光分量，从而提高S / N（信噪比）比。

10. 发明专利

JPS5295998A DISPLAY UNIT OF LIQUID CRYSTAL 失效
公开(公告)号：JPS5295998A
公开(公告)日：1977-08-12
申请号：JP1228076
申请日：1976-02-09
申请人： HITACHI LTD
发明人： KOJIMA HIROOMI , NOMURA SADAO , TABUCHI TOYOJI
IPC分类号： G09G3/36 , G02F1/13 , G02F1/133 , G02F1/135 , G09F9/00 , G09G3/18
摘要： PURPOSE:To display pictures on multiple display section with one ferrodielective substance by manufacturing only liquid crystal display and by connecting the condensers and the ferrodielectric substance or the like to it externally and electrically.

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