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    • 2. 发明授权
    • Acoustic boundary wave device and electronic apparatus using the same
    • 声界波装置及其使用的电子装置
    • US07999437B2
    • 2011-08-16
    • US12619077
    • 2009-11-16
    • Hiroki KamiguchiHidekazu NakanishiYosuke HamaokaShoji Okamoto
    • Hiroki KamiguchiHidekazu NakanishiYosuke HamaokaShoji Okamoto
    • H03H9/25
    • H03H9/0222
    • An acoustic boundary wave device includes a piezoelectric body, an IDT layer formed on the piezoelectric body, a pad electrode layer formed on the piezoelectric body and connected to the IDT layer, a first dielectric layer formed on the piezoelectric body and covering at least a part of the IDT electrode layer, and a second dielectric layer formed on the piezoelectric body, covering the first dielectric layer, and having an opening through which at least a part of a top face of the pad electrode layer is exposed. The metal forming lateral faces of the pad electrode layer diffuses more readily into the first dielectric layer than into the second dielectric layer. The second dielectric layer covers the lateral faces of the pad electrode layer and prevents the first dielectric layer from touching the lateral faces of the pad electrode layer.
    • 声界波装置包括压电体,形成在压电体上的IDT层,形成在压电体上并连接到IDT层的焊盘电极层,形成在压电体上并覆盖至少一部分的第一电介质层 以及形成在所述压电体上的第二电介质层,覆盖所述第一电介质层,并且具有露出所述焊盘电极层的顶面的至少一部分的开口部。 焊盘电极层的形成金属的侧面比第二电介质层更容易扩散到第一电介质层。 第二电介质层覆盖焊盘电极层的侧面,并且防止第一电介质层接触焊盘电极层的侧面。
    • 3. 发明申请
    • ACOUSTIC WAVE DEVICE AND ACOUSTIC WAVE FILTER
    • 声波设备和声波滤波器
    • US20110193655A1
    • 2011-08-11
    • US13125633
    • 2010-02-23
    • Hiroki KamiguchiHidekazu NakanishiYosuke HamaokaShoji OkamotoHiroyuki Nakamura
    • Hiroki KamiguchiHidekazu NakanishiYosuke HamaokaShoji OkamotoHiroyuki Nakamura
    • H03H9/54
    • H03H9/02992H03H3/08H03H9/02685H03H9/14517
    • An acoustic wave device includes an interdigital transducer (IDT) electrode and a separate electrode facing the IDT electrode. The IDT electrode includes first and second comb-shaped electrode facing each other. The first comb-shaped electrode includes a first bus bar, first interdigitated electrode fingers, and first dummy electrode fingers. The second comb-shaped electrode includes a second bus bar second interdigitated electrode fingers interdigitated with the first interdigitated electrode fingers, second dummy electrode fingers facing the first interdigitated electrode fingers, weighted parts, and a non-weighted part. The weighted parts have electrodes at spaces between the second interdigitated electrode fingers and the second dummy electrode fingers. In the non-weighted part, there is no electrode at a space out of the spaces which is closest to the separate electrode in the non-interdigitated region. This acoustic wave device prevents short circuits between the IDT electrode and the separate electrode, and provides excellent characteristics of suppressing unwanted waves.
    • 声波装置包括叉指式换能器(IDT)电极和面向IDT电极的单独电极。 IDT电极包括彼此面对的第一和第二梳状电极。 第一梳状电极包括第一汇流条,第一交叉指状电极指和第一虚拟电极指。 所述第二梳状电极包括与所述第一交叉指状物电极指相交叉的第二汇流条第二交叉指状电极指,所述第二虚拟电极指指向所述第一交叉指状电极指,所述加权部和非加权部。 加权部分在第二交叉指状电极指和第二虚拟电极指之间的空间具有电极。 在非加重部分中,在非叉指区域中最靠近分离电极的空间之外的空间中不存在电极。 该声波装置防止IDT电极和分离电极之间的短路,并且提供抑制不想要的波的优良特性。
    • 10. 发明授权
    • Acoustic wave device and acoustic wave filter
    • 声波装置和声波滤波器
    • US08669832B2
    • 2014-03-11
    • US13125633
    • 2010-02-23
    • Hiroki KamiguchiHidekazu NakanishiYosuke HamaokaShoji OkamotoHiroyuki Nakamura
    • Hiroki KamiguchiHidekazu NakanishiYosuke HamaokaShoji OkamotoHiroyuki Nakamura
    • H03H9/64H03H9/25H03H9/42
    • H03H9/02992H03H3/08H03H9/02685H03H9/14517
    • An acoustic wave device includes an interdigital transducer (IDT) electrode and a separate electrode facing the IDT electrode. The IDT electrode includes first and second comb-shaped electrode facing each other. The first comb-shaped electrode includes a first bus bar, first interdigitated electrode fingers, and first dummy electrode fingers. The second comb-shaped electrode includes a second bus bar second interdigitated electrode fingers interdigitated with the first interdigitated electrode fingers, second dummy electrode fingers facing the first interdigitated electrode fingers, weighted parts, and a non-weighted part. The weighted parts have electrodes at spaces between the second interdigitated electrode fingers and the second dummy electrode fingers. In the non-weighted part, there is no electrode at a space out of the spaces which is closest to the separate electrode in the non-interdigitated region. This acoustic wave device prevents short circuits between the IDT electrode and the separate electrode, and provides excellent characteristics of suppressing unwanted waves.
    • 声波装置包括叉指式换能器(IDT)电极和面向IDT电极的单独电极。 IDT电极包括彼此面对的第一和第二梳状电极。 第一梳状电极包括第一汇流条,第一交叉指状电极指和第一虚拟电极指。 所述第二梳状电极包括与所述第一交叉指状物电极指相交叉的第二汇流条第二交叉指状电极指,所述第二虚拟电极指指向所述第一交叉指状电极指,所述加权部和非加权部。 加权部分在第二交叉指状电极指和第二虚拟电极指之间的空间具有电极。 在非加重部分中,在非叉指区域中最靠近分离电极的空间之外的空间中不存在电极。 该声波装置防止IDT电极和分离电极之间的短路,并且提供抑制不想要的波的优良特性。