公开(公告)号：US20050151602A1

公开(公告)日：2005-07-14

申请号：US11033274

申请日：2005-01-12

申请人： Tomoka Hattanda ,  Osamu Kawachi

发明人： Tomoka Hattanda ,  Osamu Kawachi

IPC分类号： H03H9/25 ,  H03H9/05 ,  H03H9/10 ,  H03H9/64

CPC分类号： H03H9/059 ,  H01L2224/05568 ,  H01L2224/05573 ,  H01L2224/14 ,  H01L2224/16225 ,  H01L2924/00014 ,  H03H9/1071 ,  H03H9/6436 ,  H03H9/6483 ,  H01L2224/05599

摘要： A surface acoustic wave (SAW) device includes a SAW chip including comb-like electrodes arranged on a piezoelectric substrate, and a package on which the SAW chip is flip-chip mounted, the package including an interconnection that connects the comb-like electrodes. Resonators are connected to signal interconnection pads through the interconnection pattern. IDTs in a three-IDT multimode filter are respectively connected to the signal interconnection pads via another interconnection pattern. The signal interconnection pads are connected to a signal interconnection provided on a chip mounting surface with bumps. Then, a part of the interconnection pattern connecting the resonators is extracted onto the package. It is thus possible to design the interconnections on the package flexibly and thereby easy to adjust the impedance of the interconnections that connect the resonators.

摘要翻译： 表面声波（SAW）器件包括：SAW芯片，其包括布置在压电基片上的梳状电极，以及封装，SAW芯片被倒装安装在该封装上，该封装件包括连接梳状电极的互连。 谐振器通过互连图案连接到信号互连焊盘。 三IDT多模式滤波器中的IDT分别经由另一互连模式连接到信号互连焊盘。 信号互连焊盘连接到设置在具有凸块的芯片安装表面上的信号互连。 然后，将连接谐振器的互连图案的一部分提取到封装上。 因此，可以灵活地设计封装上的互连，从而易于调节连接谐振器的互连的阻抗。

公开(公告)号：US20050151601A1

公开(公告)日：2005-07-14

申请号：US11014164

申请日：2004-12-17

申请人： Hiroyuki Furusato ,  Osamu Kawachi

发明人： Hiroyuki Furusato ,  Osamu Kawachi

IPC分类号： H03H9/00 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0061 ,  H03H9/02921 ,  H03H9/6483

摘要： A SAW filter includes multiple SAW resonators. The multiple SAW resonators, which are connected in series, are connected any one of between a signal input terminal and a ground that is the closest thereto and between a signal output terminal and another ground that is the closest thereto. The SAW resonators have substantially equal electrostatic capacitances. It is thus possible to protect the SAW resonators without providing a sacrificial electrode for electrostatic breakdown, and thereby possible to configure the SAW filter having a high reliability against the electrostatic discharge.

摘要翻译： SAW滤波器包括多个SAW谐振器。 串联连接的多个SAW谐振器连接在信号输入端子与最靠近的信号输入端子与信号输出端子与最靠近的接地端子之间的任何一个。 SAW谐振器具有基本相等的静电电容。 因此，可以在不设置用于静电击穿的牺牲电极的情况下保护SAW谐振器，并且由此可以配置具有高静电放电可靠性的SAW滤波器。

公开(公告)号：US20050110599A1

公开(公告)日：2005-05-26

申请号：US10992116

申请日：2004-11-19

申请人： Hiroshi Kanasaki ,  Osamu Kawachi

发明人： Hiroshi Kanasaki ,  Osamu Kawachi

IPC分类号： H03H9/64 ,  H03H9/00 ,  H03H9/145 ,  H03H9/25

CPC分类号： H03H9/0028 ,  H03H9/0038 ,  H03H9/0042 ,  H03H9/0057 ,  H03H9/0061 ,  H03H9/0071 ,  H03H9/02874 ,  H03H9/02913

摘要： A surface acoustic wave (SAW) filter includes a piezoelectric substrate, a first interdigital transducer (IDT) for input and a second IDT for output that are provided on the piezoelectric substrate, the first IDT and the second IDT being arranged in a propagation direction, and a shield electrode arranged between the first IDT and the second IDT and/or between interconnection lines that connect the first IDT and the second IDT, at least one of the first IDT and the second IDT being of a longitudinal coupling multi-mode type having a balanced operation. Thus, it is possible to suppress a stray capacitance between the first IDT and the second IDT, and thereby to improve the symmetry of balanced operation signals.

摘要翻译： 表面声波（SAW）滤波器包括压电基片，用于输入的第一指叉式换能器（IDT）和设置在压电基片上的第二输出IDT，第一IDT和第二IDT沿传播方向布置， 以及设置在所述第一IDT和所述第二IDT之间和/或连接所述第一IDT和所述第二IDT的互连线之间的屏蔽电极，所述第一IDT和所述第二IDT中的至少一个是纵向耦合多模式， 平衡的操作。 因此，可以抑制第一IDT和第二IDT之间的杂散电容，从而提高平衡操作信号的对称性。