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    • 2. 发明授权
    • Thin film piezoelectric bulk acoustic wave resonator and radio frequency filter using the same
    • 薄膜压电体声波谐振器和射频滤波器使用相同
    • US07489063B2
    • 2009-02-10
    • US11627858
    • 2007-01-26
    • Atsushi IsobeKengo AsaiHisanori MatsumotoNobuhiko Shibagaki
    • Atsushi IsobeKengo AsaiHisanori MatsumotoNobuhiko Shibagaki
    • H01L41/08
    • H03H9/02228H03H3/04H03H9/173H03H9/175H03H9/564H03H9/568H03H9/605H03H2003/0428H03H2003/0457H03H2003/0471
    • An object of the present invention is to provide an inexpensive thin film piezoelectric bulk acoustic wave resonator that allows fine-tuning of a resonant frequency. Another object is to provide an inexpensive filter with dramatically improved frequency characteristics, using thin film piezoelectric bulk acoustic wave resonators that can be formed on one substrate. A thin film piezoelectric bulk acoustic wave resonator of the present invention has a laminated structure including a piezoelectric thin film, and a first metal electrode film and a second metal electrode film between which part of the piezoelectric thin film is sandwiched; the first metal electrode film has a plurality of holes formed on an electrode plane opposite to the second metal electrode film and having a depth equivalent to at least the thickness of the first metal electrode film; and if a combined thickness of top and bottom electrode layers and the piezoelectric thin film is ht, the covering ratio σ of the electrode plane of the first metal electrode film satisfies a condition 0
    • 本发明的目的是提供一种廉价的薄膜压电体声波谐振器,其允许谐振频率的微调。 另一个目的是提供一种具有显着改善的频率特性的便宜的滤波器,使用可以在一个基板上形成的薄膜压电体声波谐振器。 本发明的薄膜压电体声波谐振器具有包括压电薄膜和第一金属电极薄膜和第二金属电极薄膜的叠层结构,压电薄膜的一部分夹在其间; 所述第一金属电极膜具有形成在与所述第二金属电极膜相反的电极面上并且具有至少等于所述第一金属电极膜的厚度的深度的多个孔; 并且如果顶部和底部电极层和压电薄膜的组合厚度为ht,则对于每1.28ht间距,第一金属电极膜的电极平面的覆盖比sigma满足条件0 <σ<1。
    • 7. 发明申请
    • THIN FILM PIEZOELECTRIC BULK ACOUSTIC WAVE RESONATOR AND RADIO FREQUENCY FILTER USING THE SAME
    • 薄膜压电体积波形谐振器和无线电频率滤波器
    • US20080024042A1
    • 2008-01-31
    • US11627858
    • 2007-01-26
    • Atsushi IsobeKengo AsaiHisanori MatsumotoNobuhiko Shibagaki
    • Atsushi IsobeKengo AsaiHisanori MatsumotoNobuhiko Shibagaki
    • H01L41/047
    • H03H9/02228H03H3/04H03H9/173H03H9/175H03H9/564H03H9/568H03H9/605H03H2003/0428H03H2003/0457H03H2003/0471
    • An object of the present invention is to provide an inexpensive thin film piezoelectric bulk acoustic wave resonator that allows fine-tuning of a resonant frequency. Another object is to provide an inexpensive filter with dramatically improved frequency characteristics, using thin film piezoelectric bulk acoustic wave resonators that can be formed on one substrate. A thin film piezoelectric bulk acoustic wave resonator of the present invention has a laminated structure including a piezoelectric thin film, and a first metal electrode film and a second metal electrode film between which part of the piezoelectric thin film is sandwiched; the first metal electrode film has a plurality of holes formed on an electrode plane opposite to the second metal electrode film and having a depth equivalent to at least the thickness of the first metal electrode film; and if a combined thickness of top and bottom electrode layers and the piezoelectric thin film is ht, the covering ratio σ of the electrode plane of the first metal electrode film satisfies a condition 0
    • 本发明的目的是提供一种廉价的薄膜压电体声波谐振器,其允许谐振频率的微调。 另一个目的是提供一种具有显着改善的频率特性的便宜的滤波器,使用可以在一个基板上形成的薄膜压电体声波谐振器。 本发明的薄膜压电体声波谐振器具有包括压电薄膜和第一金属电极薄膜和第二金属电极薄膜的叠层结构,压电薄膜的一部分夹在其间; 所述第一金属电极膜具有形成在与所述第二金属电极膜相反的电极面上并且具有至少等于所述第一金属电极膜的厚度的深度的多个孔; 并且如果顶部和底部电极层和压电薄膜的组合厚度为ht,则对于每1.28ht间距,第一金属电极膜的电极平面的覆盖比sigma满足条件0 <σ<1。
    • 9. 发明申请
    • Bulk acoustic wave resonator, bulk acoustic wave filter, RF module including bulk acoustic wave resonator and/or filter, and bulk acoustic wave oscillator
    • 体声波谐振器,体声波滤波器,包括体声波谐振器和/或滤波器的RF模块以及体声波振荡器
    • US20060267710A1
    • 2006-11-30
    • US11345538
    • 2006-02-02
    • Hisanori MatsumotoTomio IwasakiKengo AsaiNobuhiko Shibagaki
    • Hisanori MatsumotoTomio IwasakiKengo AsaiNobuhiko Shibagaki
    • H03H9/54
    • H03H9/02086H03H9/174H03H9/175
    • A bulk acoustic wave resonator which has excellent elasticity and high electromechanical energy conversion efficiency. A bulk acoustic wave resonator comprises a substrate, a lower electrode formed on the substrate, an interlayer formed on the lower electrode layer, a piezoelectric layer formed on the interlayer, and an upper electrode layer formed on the piezoelectric layer. Moreover, both the first lattice mismatch, which is determined between a short edge of the lattice constituting a closest packed plane of a material consisting of an interlayer and a short edge of the lattice constituting a closest packed plane of a material consisting of a piezoelectric layer, and the second lattice mismatch, which is determined between a long edge of the lattice constituting a closest packed plane of a material consisting of an interlayer and a long edge of the lattice constituting a closest packed plane of a material consisting of the piezoelectric layer, are 7% or less, and a lower electrode layer is a material in which the value of the elastic stiffness C33 is 200 GN/m2 or more.
    • 具有优异弹性和高机电能量转换效率的体声波谐振器。 体声波谐振器包括基板,形成在基板上的下电极,形成在下电极层上的中间层,形成在中间层上的压电层,以及形成在压电层上的上电极层。 此外,在构成由中间层构成的材料的最接近的填充平面的晶格的短边缘和构成由压电层构成的材料的最接近的填充平面的晶格的短边缘之间确定的第一晶格失配 以及在构成由中间层构成的材料的最接近的填充平面的格子的长边和构成由压电体构成的材料的最接近的填充面的格子的长边缘之间确定的第二晶格失配, 为7%以下,下部电极层为弹性刚度C333的值为200Ng / m 2以上的材料。
    • 10. 发明授权
    • Bulk acoustic wave resonator, bulk acoustic wave filter, RF module including bulk acoustic wave resonator and/or filter, and bulk acoustic wave oscillator
    • 体声波谐振器,体声波滤波器,包括体声波谐振器和/或滤波器的RF模块以及体声波振荡器
    • US07586390B2
    • 2009-09-08
    • US11345538
    • 2006-02-02
    • Hisanori MatsumotoTomio IwasakiKengo AsaiNobuhiko Shibagaki
    • Hisanori MatsumotoTomio IwasakiKengo AsaiNobuhiko Shibagaki
    • H03H9/15H03H9/54H03H9/13
    • H03H9/02086H03H9/174H03H9/175
    • A bulk acoustic wave resonator which has excellent elasticity and high electromechanical energy conversion efficiency. A bulk acoustic wave resonator comprises a substrate, a lower electrode formed on the substrate, an interlayer formed on the lower electrode layer, a piezoelectric layer formed on the interlayer, and an upper electrode layer formed on the piezoelectric layer. Moreover, both the first lattice mismatch, which is determined between a short edge of the lattice constituting a closest packed plane of a material consisting of an interlayer and a short edge of the lattice constituting a closest packed plane of a material consisting of a piezoelectric layer, and the second lattice mismatch, which is determined between a long edge of the lattice constituting a closest packed plane of a material consisting of an interlayer and a long edge of the lattice constituting a closest packed plane of a material consisting of the piezoelectric layer, are 7% or less, and a lower electrode layer is a material in which the value of the elastic stiffness C33 is 300 GN/m2 or more.
    • 具有优异弹性和高机电能量转换效率的体声波谐振器。 体声波谐振器包括基板,形成在基板上的下电极,形成在下电极层上的中间层,形成在中间层上的压电层,以及形成在压电层上的上电极层。 此外,在构成由中间层构成的材料的最接近的填充平面的晶格的短边缘和构成由压电层构成的材料的最接近的填充平面的晶格的短边缘之间确定的第一晶格失配 以及在构成由中间层构成的材料的最接近的填充平面的格子的长边和构成由压电体构成的材料的最接近的填充面的格子的长边缘之间确定的第二晶格失配, 为7%以下,下部电极层为弹性刚度C33的值为300Ng / m 2以上的材料。