公开(公告)号：EP0810727A3

公开(公告)日：1998-08-05

申请号：EP96119597

申请日：1996-12-06

申请人： FUJITSU LTD

发明人： UEDA MASANORI ,  ENDOH GOU ,  KAWACHI OSAMU ,  FUJIWARA YOSHIRO

IPC分类号： H01L41/09 ,  H03H9/00 ,  H03H9/10 ,  H03H9/145 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0038 ,  H03H9/0042 ,  H03H9/0061 ,  H03H9/1071 ,  H03H9/25 ,  H03H9/6436 ,  H03H9/6459 ,  H03H9/6466 ,  H03H9/6489

摘要： A surface-acoustic-wave device includes at least first and second surface-acoustic-wave elements (11, 21) formed on a common piezoelectric substrate (1) and cascaded with each other, each of the first and second surface-acoustic-wave elements including a plurality of interdigital electrodes (11A - 11C; 21A - 21C) having a plurality of electrode fingers overlapping with each other in correspondence to a path of a surface acoustic wave on the piezoelectric substrate, wherein the width (W
1 , W
2 ) of overlapping of the electrode fingers is changed between the first surface-acoustic-wave element and the second surface-acoustic-wave element.

摘要翻译： 一种双模式的表面声波器件，包括：压电基板; 第一和第二反射器（10A，10B）设置在沿着在所述压电基板的表面声波的传播路径，所述压电基片; 第一，连续从所述第一反射器与所述第二反射器设置在所述压电基片的第二和第三叉指型电极; 每个所述的第一至第三叉指型电极包括第一至第三数目分别对电极指的; 对电极指的对所述第一交叉电极的worin说firstNumber是从所述第三数量电极指对用于所述第三叉指式电极的不同。