| US 7,554,428 B2 | ||
| Boundary acoustic wave device comprising Ni diffused in Au and method for manufacturing the same | ||
| Daisuke Yamamoto, Muko (Japan); Hajime Kando, Ritto (Japan); Akihiro Teramoto, Ishikawa-gun (Japan); Toshiyuki Fuyutsume, Moriyama (Japan); and Masahiko Saeki, Kanazawa (Japan) | ||
| Assigned to Murata Manufacturing Co., Ltd., Kyoto (Japan) | ||
| Filed on Aug. 13, 2008, as Appl. No. 12/190,620. | ||
| Application 12/190620 is a continuation of application No. PCT/JP2007/051004, filed on Jan. 23, 2007. | ||
| Claims priority of application No. 2006-047070 (JP), filed on Feb. 23, 2006. | ||
| Prior Publication US 2008/0290968 A1, Nov. 27, 2008 | ||
| Int. Cl. H03H 9/145 (2006.01); H03H 9/25 (2006.01); H03H 3/08 (2006.01); H01L 41/047 (2006.01); H01L 41/18 (2006.01); H01L 41/22 (2006.01) | ||
| U.S. Cl. 333—193 [333/195; 310/313 B; 310/313 D; 310/364; 29/25.35] | 10 Claims |
| 1. A boundary acoustic wave device comprising:
a first medium;
a second medium; and
an IDT electrode disposed at an interface between the first medium and the second medium, the IDT electrode having an Au layer
defining a main electrode layer; wherein
the IDT electrode includes the Au layer and a Ni layer disposed so as to contact at least one surface of the Au layer; and
a portion of Ni defining the Ni layer is diffused from the Ni layer side surface of the Au layer toward the inside of the
Au layer.
|