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51. 发明专利

JPS5435657A SURFACE SLIP WAVE RESONATOR FILTER 失效
公开(公告)号：JPS5435657A
公开(公告)日：1979-03-15
申请号：JP10155277
申请日：1977-08-26
申请人： HITACHI LTD
发明人： KOJIMA HIROOMI , TABUCHI TOYOJI , KINOSHITA YASUAKI
IPC分类号： H03H9/145 , H03H3/08 , H03H9/02
摘要： PURPOSE:To obtain a small-size, cheap and superior-characteristic resonator and filter utilizing the surface slip wave by reducing the substrate thickness by setting the substrate material constant.

52. 发明专利

JPS525297A LIQUID CRYSTAL DISPLAY COMPRISING FERROELECTRIC SUBSTANCE 失效
公开(公告)号：JPS525297A
公开(公告)日：1977-01-14
申请号：JP8087275
申请日：1975-07-02
申请人： HITACHI LTD
发明人： ZAMA HIDEO , HIBI MASAO , KOJIMA HIROOMI , TABUCHI TOYOJI , MURATA RIYOUZOU
IPC分类号： G09G3/36 , G02F1/13 , G02F1/133 , G09F9/00 , G09F9/30
摘要： PURPOSE:Simple structure liquid crystal display forming a part which is polarized and inverted into a ferro electric substance and a condensor which accumulates electric charge on the same flat board.

53. 发明专利

JPS5124896A KYOJUDENTAIO MOCHIITA EKISHOHYOJISOSHI NIOKERU DENKYOKUKOZO 失效
公开(公告)号：JPS5124896A
公开(公告)日：1976-02-28
申请号：JP9615674
申请日：1974-08-23
申请人： HITACHI LTD
发明人： TABUCHI TOYOJI , MURATA RYOZO
IPC分类号： G09G3/36 , G02F1/13 , G02F1/133 , G02F1/135 , G09F9/30

54. 发明专利

JPH05308242A 失效
公开(公告)号：JPH05308242A
公开(公告)日：1993-11-19
申请号：JP10951092
申请日：1992-04-28
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA , TABUCHI TOYOJI , OKAZAKI KATSUNORI
IPC分类号： H03H9/02 , H03H9/145 , H03H9/64
摘要： PURPOSE:To realize a surface acoustic wave(SAW) filter with low loss or a filter covering a wide band by employing an electrode finger whose width is a minimum of 1/16 of the wavelength of the SAW. CONSTITUTION:An exciting electrode finger 6-1 whose width is lambda0/8 with respect to the wavelength of a SAW is provided to a region L symmetrically in the horizontal direction and earth electrode fingers 7-1, 8-1 whose width is lambda0/16 are in existence at both sides via a space of lambda0/8. Through the constitution above, since electric force of lines are in existence symmetrically in the horizontal direction in the region L, it is possible to excite SAWs of the same amplitude and phase in the horizontal direction. Then earth electrode fingers 7-1, 8-1 whose width is lambda0/4 are arranged to the left at the outside of the region L and a space of lambda0/4 is arranged to the right. That is, the SAW excited in the region L is propagated toward the outside of the region L, but the propagation condition differs in the right and left directions. The different propagation region is in existence at both sides of the SAW excitation region whose width is L and a periodic structure is adopted for the entire transducer as one SAW.

55. 发明专利

JPH0378263A SURFACE ACOUSTIC WAVE DEVICE PACKAGE 失效
公开(公告)号：JPH0378263A
公开(公告)日：1991-04-03
申请号：JP21407689
申请日：1989-08-22
申请人： HITACHI LTD
发明人： KUROSAWA KAZUHITO , HIKITA MITSUTAKA , TABUCHI TOYOJI , SHIBAGAKI NOBUHIKO , HIRASHIMA TETSUYA
IPC分类号： H01L41/113
摘要： PURPOSE:To make very small interearth capacitance between a comb-shaped electrode and a bonding pad of a surface acoustic wave device, and a metal stem by forming with a non-metallic member a portion of the stem with which the surface acoustic wave device makes close contact. CONSTITUTION:The whole of a portion of a stem 5 with which the back surface of a surface acoustic wave device 1 makes close contact is so blanked that it penetrates the stem 5, and the hole is filled with a non-metallic member 9. The device 1 is fixedly placed on the non-metallic member 9, and a bonding pad 4 and a terminal pin 7 are wire-bonded through a metal fine line 8. With such arrangement, interearth capacitance between the thin film comb-shaped electrode 3 and the pad 4 of the device 1 and the metal stem 5 is made very small and negligible on circuit design.

56. 发明专利

JPS60160719A SURFACE ACOUSTIC WAVE POWER SPLITTER 失效
公开(公告)号：JPS60160719A
公开(公告)日：1985-08-22
申请号：JP1516884
申请日：1984-02-01
申请人： HITACHI LTD
发明人： HIKITA MITSUTAKA , TABUCHI TOYOJI , NAKAKOSHI ARATA
IPC分类号： H03H9/145 , H03H3/08 , H03H9/76
摘要： PURPOSE:To obtain a power splitter with low loss by arranging repetitively the constitution of a basic building block for plural number of times in the propagating direction of a surface wave to constitute the splitter. CONSTITUTION:The constitution where the 1st and 2nd output transducers are arranged respectively at the upper and lower part at both sides of a couple of transducers split into the upper and lower parts is used as a basic building block and provided laterally for plural number of times, terminals corresponding electrically to the input and output are connected in parallel, an electric signal applied to an input terminal 12 is converted respectively into a surface acoustic wave by the upper/lower input transducers 14, 16, 18, 20, 22, 24, 26 and 28, the wave is converted again into an electric signal by opposed output transducers and the signal is outputted to output terminals 10 and 11. The number of pairs of each transducer repeated laterally in one chip is decreased gradually to decrease the leakage loss.

57. 发明专利

JPS5958907A Electrode constituting method of surface acoustic wave filter 失效
标题翻译：表面声波滤波器的电极构成方法
公开(公告)号：JPS5958907A
公开(公告)日：1984-04-04
申请号：JP16835382
申请日：1982-09-29
申请人： Hitachi Ltd
发明人： TABUCHI TOYOJI , HIKITA MITSUTAKA
IPC分类号： H03H3/08 , H03H9/145 , H03H9/64
CPC分类号： H03H3/08 , H03H9/145 , H03H9/6426
摘要： PURPOSE: To set the center frequency by the order of ≥1 digit with high accuracy in the present photomask forming specifications, by increasing or decreasing the interdigital electrode with only as to one or plural interdigital electrodes within the conventional accuracy of the photomask at each repetition of the interdigital electrodes.
CONSTITUTION: The insulating region of the interdigital electrode and between said interdigital electrodes is set to two kinds of widths, one width has a change being ≤1μm from the other and the relation of the combination of the two kinds of widths realizing the prescribed electrode pitch is provided repetitively to the entire filter. Figure (a) shows the state before the execution of this invention and figures (b), (c), (d) are the states after the execution. In figure (a), one wavelength is λ
0 and the electrode with is 1/4-wavelength, i.e. (l). In taking the change in the electrode width as Δl, the minimum value of Δl is 0.1μm in the present photomask forming device. Thus, this invention is effective when the accuracy is requested to the order of ≤0.1μm.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：在目前的光掩模形成规范中，以高精度设置中心频率大于等于1位的数字，通过增加或减少叉指电极，仅在每个光掩模的常规精度范围内仅提供一个或多个指状电极叉指电极重复。构成：叉指电极的绝缘区域和所述叉指电极之间的绝缘区域被设定为两种宽度，一个宽度的变化是<= 1mum，并且实现规定电极的两种宽度的组合的关系沥青重复提供给整个过滤器。图（a）是本发明执行前的状态，图（b），（c），（d）是执行后的状态。在图（a）中，一个波长为λ0，电极为1/4波长，即（l）。在电极宽度的变化为DELTA1时，在本光掩模形成装置中DELTA1的最小值为0.1μm。因此，当请求精度为<= 0.1mum的量级时，本发明是有效的。

58. 发明专利

JPS5951615A Surface acoustic wave resonance filter 失效
标题翻译：表面声波谐振滤波器
公开(公告)号：JPS5951615A
公开(公告)日：1984-03-26
申请号：JP13586283
申请日：1983-07-27
申请人： Hitachi Ltd
发明人： TABUCHI TOYOJI , KINOSHITA YASUAKI , HIKITA MITSUTAKA
IPC分类号： H03H3/08 , H03H9/25 , H03H9/64
CPC分类号： H03H9/25
摘要： PURPOSE:To obtain a filter with excellent in-band characteristics, by setting an electric length between two transducers and an electric length between the transducer and an equivalent reflecting plane of a reflector to a prescribed value so as to eliminate the effect of a reflected wave. CONSTITUTION:A part of a direct wave reaching directly the transducer 6 among excited waves is a reflected wave 9, which is returned to the transducer 5. On the other hand, the wave reaching the adjacent reflector 1 is reflected on the equivalent reflecting plane 11 and passes through the transducer 5, and a part of it becomes a reflected wave 10. The reflected wave 10 is reflected againt on the equivalent reflecting plane 11 of the reflector 1 and returns to the transducer 5. The two reflectors 9, 10 are interferred with each other on the transducer 5, which causes a ripple in the in-band characteristic of the filter. In order to avoid the effect of the reflected wave, the electric length l3 between the transducers 5, 6 is brought different from by an odd number multiple from the length of twice the electric length l4 between the transducer 5 and the equivalent reflected plane 11 of the transducer 5. Thus, the filter having excellent in- band characteristic is obtained.
摘要翻译：目的：为了获得具有优异带内特性的滤波器，通过将两个换能器之间的电长度和换能器与反射器的等效反射面之间的电长度设置为规定值，以消除反射波的影响。构成：在激发波之间直接到达换能器6的直接波的一部分是反射波9，其被返回到换能器5.另一方面，到达相邻反射器1的波被反射在等效反射平面11上并且通过换能器5，并且其一部分变为反射波10.反射波10再次反射在反射器1的等效反射面11上并返回到换能器5.两个反射器9,10被干涉彼此在传感器5上，这导致滤波器的带内特性中的纹波。为了避免反射波的影响，换能器5,6之间的电长度l3与换能器5和等效反射面11之间的电长度l4的两倍的长度相差奇数倍换能器5.因此，获得具有优异的带内特性的滤波器。

59. 发明专利

JPS55687A ELASTIC SURFACE WAVE FILTER 失效
公开(公告)号：JPS55687A
公开(公告)日：1980-01-07
申请号：JP5152179
申请日：1979-04-27
申请人： HITACHI LTD
发明人： KINOSHITA YASUAKI , TABUCHI TOYOJI
IPC分类号： H03H9/25 , H03H3/08 , H03H9/02 , H03H9/64
摘要： PURPOSE:To obtain an elastic surface wave filter which features a low loss and wide range with no ripple caused to the frequency characteristics. CONSTITUTION:Reflective electrode groups 17,18,19 and 20 are formed with transducer 2 comprising the comb-line sending-end reed screen electrode groups which convert the electric signals into the elastic surface waves on the surface of piezoelectric substrate 14; transducer 3 of comb-line receiving-end which converts the elastic surface waves into the electric signals; coupling electrode groups 15 and 16 arranged in parallel at both sides of the above mentioned electrode groups; and four comb-line reed screen electrode groups provided outside groups 15 and 16 respectively. And electrode groups 15 and 16 are constituted so that they may operate as the 3dB directional couplers.

60. 发明专利

JPS5419636A ELASTIC SURFACE WAVE FILTER 失效
公开(公告)号：JPS5419636A
公开(公告)日：1979-02-14
申请号：JP8427677
申请日：1977-07-15
申请人： HITACHI LTD
发明人： KINOSHITA YASUAKI , TABUCHI TOYOJI
IPC分类号： H03H9/64 , H03H3/08 , H03H9/145
摘要： PURPOSE:To obtain the performance less in spurious response and to increase the freedom of design for the pass band characteristics, by connecting the unit resonance region on a piezoelectric substrate in succession.

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