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    INTEGRALLY SINTERED CERAMIC COMPLEX AND METHOD OF MANUFACTURING THE SAME
    1.
    发明授权
    INTEGRALLY SINTERED CERAMIC COMPLEX AND METHOD OF MANUFACTURING THE SAME 失效

    公开(公告)号：KR800000297B1

    公开(公告)日：1980-04-10

    申请号：KR750002695

    申请日：1975-12-10

    Applicant: SONY CORP

    Inventor： KITAMURA TOMOSABUROU

    IPC: B32B7/02 ,  C04B35/00 ,  C04B35/46

    Abstract: The complex ceramic preventing the reflexion of unnecessary waves is composed of 2 more ceramics which can mix and sinter with each other. Of the two ceramics, the ratios of both theorical density and sintering density of one ceramic are higher than those of the other one. The concentrated ceramic is operated as the wave passways and the porous ceramic is operated as the reflexion preventer of ultrasonic waves.

    Surface wave element
    5.
    发明专利
    Surface wave element 失效
    表面波元件

    公开(公告)号：JPS59139714A

    公开(公告)日：1984-08-10

    申请号：JP916584

    申请日：1984-01-20

    Applicant: Sony Corp

    Inventor： KITAMURA TOMOSABUROU ,  YAMANOI HIROSHI ,  KOMATSU YASUTOSHI

    IPC: H03H3/08 ,  H03H9/145 ,  H03H9/25

    CPC classification number: H03H9/02992 ,  H03H9/02629 ,  H03H9/02637 ,  H03H9/14526

    Abstract: PURPOSE:To decrease the opposing width of the comb-shaped electrodes and to increase the impedance by providing a diffusing means of surface waves at an outer edge part rolling approximately along the propagating direction of the surface wave of an electrode formed on a piezoelectric substrate. CONSTITUTION:The grooves 6 are cut above an input electrode 2, an output electrode 3 and an earth electrode 4 with a sawtooth-shaped pattern so that these grooves cross outer edges 2a, 2b, 3a, 3b, 4a and 4b of electrodes 2-4 respectively. Thus a means 5 which diffuses undesired surface waves, and therefore the effects of undesired waves can be avoided. This reduces satisfactorily the opposing width (w) of comb-shaped electrodes and increases the impedance. Thus it is not needed that the distance (d) between the opposing part and the outer edge of an electrode is set there times as much as the wavelength. As a result, the overall size of a surface element can be reduced.

    Abstract translation: 目的：通过在形成于压电基板上的电极的表面波的传播方向大致沿着外缘部分设置表面波的扩散装置来减小梳状电极的相对宽度并增加阻抗。 构成：在输入电极2，输出电极3和具有锯齿形图案的接地电极4的上方切割槽6，使得这些沟槽横跨电极2的外边缘2a，2b，3a，3b，4a和4b， 4。 因此，可以避免扩散不期望的表面波的装置5，因此可以避免不期望的波浪的影响。 这令人满意地减少了梳状电极的相对宽度（w）并增加了阻抗。 因此，不需要将电极的相对部分和外边缘之间的距离（d）设置在与波长一样多的位置。 结果，可以减小表面元件的整体尺寸。

    ELECTRIC MECHANICAL CONVERSION ELEMENT
    6.
    发明专利
    ELECTRIC MECHANICAL CONVERSION ELEMENT 失效

    公开(公告)号：JPS5478993A

    公开(公告)日：1979-06-23

    申请号：JP14646777

    申请日：1977-12-06

    Applicant: SONY CORP

    Inventor： KITAMURA TOMOSABUROU ,  KODERA YOUICHI

    IPC: G11B5/592 ,  B06B1/06 ,  G11B5/52 ,  G11B5/53 ,  G11B5/58 ,  H01L41/04 ,  H01L41/09 ,  H02N2/00

    Abstract: PURPOSE:To increase the accuracy of position adjustment such as magnetic head, by reducing the residual displacement, through the use of a porcelain plate in non-ferro-dielectric phase within the operating temperature. CONSTITUTION:The position control of the magnetic head having narrow track width such as VTR etc. requires high accuracy and control is made by using electric mechanical conversion element, as the element, the electrodes 12a and 12b are coated on the both major planes, and two non-ferrodielectric porcelain plates in non- ferro dielectric phase within the operating temperature are constituted for the element of bimorph construction by clipping the metal substrate 13, and one of the power supply 14 is connected to the substrate 13 and another is to the electrode 12a of the pocelain plate 11 via the switch 15. With this construction, one example of the displacement amount due to electrorestriction effect when the polarity of applied voltage is inverted is within + or - 1 mum for the residual displacement to the amplitude of + or - 45 mum and the residual displacement when the piezoelectric effect of the ferrodielectric porcelain is utilized as element is remarkably reduced and the positioning of head can be made with good accuracy.

    Surface wave element
    9.
    发明专利
    Surface wave element 失效
    表面波元件

    公开(公告)号：JPS5925411A

    公开(公告)日：1984-02-09

    申请号：JP12575983

    申请日：1983-07-11

    Applicant: Sony Corp

    Inventor： KITAMURA TOMOSABUROU ,  YAMANOI HIROSHI ,  KOMATSU YASUTOSHI

    IPC: H03H9/145 ,  H03H3/08 ,  H03H9/02 ,  H03H9/25

    CPC classification number: H03H9/02818

    Abstract: PURPOSE:To eliminate the effect of undesired waves, by setting the distance from the counter part of a comb-line electrode through its outside edge at a value specified times as long as the surface wavelength. CONSTITUTION:The counter width (w) of each pair of comb-line electrodes of electrodes 2 and 3 is increased. Thus the effective surface wave energy going toward an output electrode 3 is increased, and the effect of undesired waves is decreased. However, the impedance is low and the load of an external circuit is large for a surface wave element of piezoelectric ceramics. Thus it is desired to decrease the counter width (w) to increase the impedance. If the width (w) is set at >=1.5mm. with a surface filter using piezoelectric ceramics with 10.7MHz (wavelength 215mum; surface wave speed 2,300m/sec), the energy is increased for the surface wave transmitted through a transmission line. In this case, the effect of undesired waves can be ignored. However, the effect of undesired waves is increased if the width (w) is =3 times as large as the surface wavelength to be transmitted. Thus the effect of undesired wavs can be eliminated even with

    Abstract translation: 目的：为了消除不想要的波浪的影响，通过将梳状电极的对置部分通过其外边缘设置在指定时间长于表面波长的值的距离。 构成：电极2和3的每对梳状线电极的计数器宽度（w）增加。 因此，朝向输出电极3的有效表面波能量增加，并且不期望的波的影响减小。 然而，对于压电陶瓷的表面波元件，阻抗低，外部电路的负载大。 因此，期望减小计数器宽度（w）以增加阻抗。 如果宽度（w）设置在> = 1.5mm。 使用具有10.7MHz（波长215mum;表面波速度2300m / sec）的压电陶瓷的表面滤波器，通过传输线传输的表面波的能量增加。 在这种情况下，不理想波的影响可以忽略不计。 然而，如果宽度（w）<= 1.0mm，则不期望的波的影响增加。因此，来自计数器部分的梳状电极的外边缘的距离（d）被设置为> = 3倍 作为待传输的表面波长。 因此，即使<= 1mm，也可以消除不希望的波浪的影响。 计数器宽度（w）。

    PIEZOELECTRIC PORCELAIN COMPOSITION
    10.
    发明专利
    PIEZOELECTRIC PORCELAIN COMPOSITION 失效

    公开(公告)号：JPS5591891A

    公开(公告)日：1980-07-11

    申请号：JP16518378

    申请日：1978-12-28

    Applicant: SONY CORP

    Inventor： KITAMURA TOMOSABUROU

    IPC: C04B35/49 ,  H01B3/12 ,  H01L41/187

    Abstract: PURPOSE:To improve the sintering characteristic and increase the piezoelectric constant by substituting a part of Pb by Bi in a porcelain composition Pb(Ni1/3Nb2/3)x TiyZrzO3. CONSTITUTION:When the expression Pb1-(3a/2)Bia(Ni(1/3)-bZnbNb(2/3))xTiyZrz O3 is given; x, y, z have a composition within the range connected by point A, where x is 65mol%, y 30mol%, and z 5mol%; point B, where x is 60mol%, y 25mol%, and z 15mol%; point C where x is 30mol%, y 37mol%, and z 33mol%; and point D where x is 30mol%, y 40mol% and z 30mol%: in the three element diagrams of Pb1-(3a/2)Bia(Ni(1/3)-bZnbNb2/3)O3, Pb1-(3a/2)BiaTiO3 and Pb1-(3A/2)BiZr O3: and a is selected at 0.005 or more and 0.02 or less, and b at 1/6 or less.

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