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    • 9. 发明授权
    • Thin-film piezoelectric resonator, filter and voltage-controlled oscillator
    • 薄膜压电谐振器,滤波器和压控振荡器
    • US07525399B2
    • 2009-04-28
    • US11376266
    • 2006-03-16
    • Naoko YanaseKenya SanoTakaaki YasumotoRyoichi OharaKazuhiko Itaya
    • Naoko YanaseKenya SanoTakaaki YasumotoRyoichi OharaKazuhiko Itaya
    • H03H9/54H03H9/15
    • H03H3/02H03H9/02125H03H9/02157H03H9/564H03H9/568H03H2003/023H03H2003/025
    • A thin-film piezoelectric resonator includes a substrate, and first and second excitation portions. The substrate includes first and second cavities. The first excitation portion is disposed over the first cavity, and includes a first electrode, a first piezoelectric material and a second electrode laminated successively. An overlapping region among the first electrode, the first piezoelectric material and the second electrode defines a contour of a periphery of the first excitation portion. A first distance is defined as a distance from an end of the first excitation portion to an opening end of the first cavity. The second excitation portion is disposed over the second cavity, and includes a third electrode, a second piezoelectric material and a fourth electrode laminated successively. A second distance is defined as a distance from an end of the second excitation portion to an opening end of the second cavity and different from the first distance.
    • 薄膜压电谐振器包括基板以及第一和第二激励部分。 衬底包括第一和第二腔。 第一激励部分设置在第一腔上方,并且包括依次层压的第一电极,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周边的轮廓。 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。 第二激励部分设置在第二腔上,并且包括依次层压的第三电极,第二压电材料和第四电极。 第二距离被定义为从第二激励部分的端部到第二腔体的开口端的距离,并且与第一距离不同。