公开(公告)号：US20040251792A1

公开(公告)日：2004-12-16

申请号：US10852104

申请日：2004-05-25

申请人： Fujitsu Media Devices Limited & Fujitsu Limited

发明人： Takashi Matsuda ,  Jun Tsutsumi ,  Shogo Inoue ,  Masanori Ueda

IPC分类号： H03H009/145

CPC分类号： H03H9/1071 ,  H03H9/02984 ,  H03H9/14538

摘要： A surface acoustic wave element includes: metal patterns that include interdigital transducers, each of the metal patterns being formed with a first alloy or multi-layer film of metals having different standard electrode potentials; and metal films each formed with a second alloy or multi-layer film containing metals having different standard electrode potentials from the standard electrode potentials of the metals forming the first alloy or multi-layer film, the metal films being formed at least on a part of the regions other than the regions corresponding to the electrode fingers of the interdigital transducers of all the metal patterns that are electrically independent of one another.

摘要翻译： 表面声波元件包括：包括叉指式换能器的金属图案，每个金属图案由具有不同标准电极电位的金属的第一合金或多层膜形成; 以及金属膜，其各自由形成第一合金或多层膜的金属的标准电极电位的第二合金或多层膜形成，所述第二合金或多层膜含有不同标准电极电位的金属，所述金属膜至少形成在 除了对应于彼此电独立的所有金属图案的叉指换能器的电极指的区域之外的区域。

公开(公告)号：US20040212453A1

公开(公告)日：2004-10-28

申请号：US10830023

申请日：2004-04-23

申请人： FUJITSU MEDIA DEVICES LIMITED & FUJITSU LIMITED

发明人： Jun Tsutsumi ,  Shogo Inoue ,  Takashi Matsuda ,  Masanori Ueda

IPC分类号： H03H009/70

CPC分类号： H03H9/0576 ,  H03H3/08 ,  H03H9/0038 ,  H03H9/6483 ,  H03H9/72 ,  H03H9/725

摘要： A duplexer includes a ladder filter and a multimode filter that are formed on the same surface of a predetermined substrate. In this duplexer, a first comb-like electrode of the ladder filter and a second comb-like electrode of the multimode filter have the same layer structure with the same film thickness. The first comb-like electrode and the second comb-like electrode are formed with single-layer films mainly containing aluminum. The relationship among the film thickness h of the first comb-like electrode and the second comb-like electrode, the center frequency f1 of the frequency band of the ladder filter, and the center frequency f2 of the frequency band of the multimode filter, is expressed as:300nullhnullf1null480300nullhnullf2null430.

摘要翻译： 双工器包括形成在预定基板的相同表面上的梯形滤波器和多模式滤波器。 在该双工器中，梯形滤波器的第一梳状电极和多模滤波器的第二梳状电极具有相同的膜厚度的相同的层结构。 第一梳状电极和第二梳状电极由主要含有铝的单层膜形成。 第一梳状电极和第二梳状电极的膜厚度h，梯形滤波器的频带的中心频率f1和多模式滤波器的频带的中心频率f2之间的关系是 表示为：300 <= hxf1 <= 480 300 <= hxf2 <= 430。