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    • 1. 发明公开
    • 박막 압전 공진기, 필터 및 전압 제어 발진기
    • 薄膜压电谐振器,滤波器和电压控制振荡器
    • KR1020060124554A
    • 2006-12-05
    • KR1020060026306
    • 2006-03-23
    • 가부시끼가이샤 도시바
    • 야나세나오꼬사노겐야야스모또다까아끼오하라료이찌이따야가즈히꼬
    • H03H9/15H01L41/08H01L41/047
    • H03H3/02H03H9/02125H03H9/02157H03H9/564H03H9/568H03H2003/023H03H2003/025
    • A thin-film piezoelectric resonator, a filter, and a voltage-controlled oscillator are provided to reduce a variation in a capacitance value of an excitation part by improving crystallinity of the excitation part arranged on a cavity or an acoustic reflection layer. A substrate(2) includes a first cavity(21,22,24,26,27) and a second cavity(23,25). The first and second cavities are separated from each other. A first excitation part(71,72,74,76,77) is arranged on the first cavity. A second excitation part(73,75) is arranged on the second cavity. The first excitation part includes a first electrode, a first piezoelectric material, and a second electrode. An overlapping region among the first electrode, the first piezoelectric material, and the second electrode defines a peripheral contour of the first excitation part. A first distance is defined as a distance from an end of the first excitation part to an opening end of the first cavity. The second excitation part includes a third electrode, a second piezoelectric material, and a fourth electrode. An overlapping region among the third electrode, the second piezoelectric material, and the fourth electrode defines a peripheral contour of the second excitation part. A second distance is defined as a distance from an end of the second excitation part to an opening end of the second cavity. The second distance is different from the first distance.
    • 提供薄膜压电谐振器,滤波器和压控振荡器,以通过改善布置在空腔或声反射层上的激励部分的结晶度来减小激励部分的电容值的变化。 基板(2)包括第一腔(21,22,24,26,27)和第二腔(23,25)。 第一和第二腔彼此分离。 第一激励部分(71,72,74,76,77)布置在第一腔上。 第二激励部分(73,75)布置在第二腔体上。 第一激励部分包括第一电极,第一压电材料和第二电极。 第一电极,第一压电材料和第二电极之间的重叠区域限定第一激励部分的外围轮廓。 第一距离被定义为从第一激励部分的端部到第一腔体的开口端的距离。 第二激励部包括第三电极,第二压电材料和第四电极。 第三电极,第二压电材料和第四电极之间的重叠区域限定第二激励部分的外围轮廓。 第二距离被定义为从第二激励部分的端部到第二腔的开口端的距离。 第二距离与第一距离不同。