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    • 10. 发明公开
    • ANGULAR VELOCITY SENSOR AND MANUFACTURING METHOD THEREFOR
    • WINKELGESCHWINDIGKEITSSENSOR UND HERSTELLUNGSVERFAHRENDAFÜR
    • EP2952853A4
    • 2016-02-10
    • EP14746045
    • 2014-01-29
    • FUJIFILM CORP
    • NAONO TAKAYUKINAKANO TAKUMA
    • G01C19/56G01C25/00
    • G01C19/5712G01C19/56G01C25/00G01P15/09G01P15/097
    • One or more vibration plate layers (21, 22) that constitute a diaphragm part (12) are formed by a thin film forming technique. When a resonance frequency in a resonance vibration mode calculated from dimensions of a structure of an angular velocity sensor (10) and an elastic parameter of a material thereof is defined as f kilohertz, a mass of a weight part (14) is defined as M milligrams, a circumference of the diaphragm part (12) is defined as r meters, a stress applied to a piezoelectric layer (32) is defined as à p pascals, a thickness thereof is defined as t p meters, a stress applied to an n-th layer from the side of the weight part (14) in a vibration plate portion constituted by a plurality of layers including a lower electrode and the vibration plate layers (21, 22) is defined as à n pascals, and a thickness thereof is defined as t n meters (where n is a natural number), T eff expressed by T eff = r(à p t p + £Ã n t n )/M satisfies {(-0.36f 2 + 210)/33} ‰¤ T eff ‰¤ {(0.44f 2 + 210)/33}.
    • 通过薄膜形成技术形成构成隔膜部分(12)的一个或多个振动板层(21,22)。 当根据角速度传感器(10)的结构的尺寸和其材料的弹性参数计算的共振振动模式中的共振频率被定义为f千赫兹时,重量部分(14)的质量被定义为M 毫微米,膜片部分(12)的圆周被定义为r米,施加到压电层(32)的应力被定义为p帕斯卡,其厚度被定义为tp米,施加到n- 在由包括下电极和振动板层(21,22)的多个层构成的振动板部分中,从配重部分(14)侧的第三层被定义为≈帕斯卡,并且其厚度被限定 作为tn米(其中n是自然数),由T eff = r(Ãppp +∈ntn)/ M表示的T eff满足{(-0.36f 2 + 210)/ 33}‰T eff‰{ (0.44f 2 + 210)/ 33}。