公开(公告)号：EP2091146A4

公开(公告)日：2009-12-09

申请号：EP07831357

申请日：2007-11-07

申请人： PANASONIC CORP

发明人： HAMAOKA YOSUKE ,  NAKANISHI HIDEKAZU ,  NAKAMURA HIROYUKI ,  GOTO REI

IPC分类号： H03H9/145 ,  H03H9/02 ,  H03H9/25

CPC分类号： H03H9/02559 ,  H03H9/1452 ,  H03H9/25

公开(公告)号：EP1962424A4

公开(公告)日：2013-04-03

申请号：EP07850596

申请日：2007-12-14

申请人： PANASONIC CORP

发明人： NAKAMURA HIROYUKI ,  NAKANISHI HIDEKAZU ,  IWASAKI YUKIO ,  MATSUNAMI KEN ,  TSURUNARI TETSUYA

IPC分类号： H03H9/145 ,  H01L41/09 ,  H01L41/18 ,  H01L41/22 ,  H01L41/23 ,  H01L41/29 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72

CPC分类号： H03H9/1452 ,  H03H9/02858 ,  H03H9/02881 ,  H03H9/02992

摘要： The present invention provides a surface acoustic wave resonator capable of improving the leak of a surface acoustic wave in the transverse direction and reducing the spurious and having superior characteristics. In a surface acoustic wave filter according to the present invention, an interdigital transducer electrode and reflector electrodes are formed on a piezoelectric substrate, and a SiO 2 thin film is further formed thereon. The interdigital transducer electrode includes a bus-bar electrode region, a dummy electrode region and a finger overlap region, and the SiO 2 thin film is removed from upper sections of the bus-bar electrode regions in the interdigital transducer electrode.

公开(公告)号：EP1713179A4

公开(公告)日：2009-03-25

申请号：EP05709911

申请日：2005-02-02

申请人： PANASONIC CORP

发明人： NAKANISHI HIDEKAZU ,  TAKAYAMA RYOICHI ,  IWASAKI YUKIO ,  NAKAMURA HIROYUKI

IPC分类号： H03H9/64 ,  H03H3/02 ,  H03H9/145 ,  H03H9/72

CPC分类号： H03H3/02 ,  H03H9/6433

摘要： A plurality of surface acoustic wave resonators (15-20), each consisting of an interdigital electrode and a grating reflector, are connected on a piezoelectric substrate (12). A dielectric film (14) is formed on the surface of at least one of the surface acoustic wave resonators (15-20), and the dielectric film (14) is not formed on the surface of at least one acoustic wave resonator. Thus, it is possible to obtain an SAW filter having a low in-band insertion loss, good sharpness and a wide band.

公开(公告)号：EP1303055A4

公开(公告)日：2009-11-04

申请号：EP01941222

申请日：2001-06-25

申请人： PANASONIC CORP

发明人： YAMADA TORU ,  MATSUMURA TSUTOMU ,  ISHIZAKI TOSHIO ,  NAKAMURA HIROYUKI ,  URIU KAZUHIDE

IPC分类号： H01P1/15 ,  H04B1/40 ,  H04B1/44 ,  H04W88/06

CPC分类号： H04B1/0057 ,  H01P1/15 ,  H04B1/005 ,  H04B1/006 ,  H04B1/406 ,  H04B1/44

公开(公告)号：EP1892832A4

公开(公告)日：2009-09-16

申请号：EP06766675

申请日：2006-06-14

申请人： PANASONIC CORP

发明人： IWASAKI TOMOHIRO ,  NAKATSUKA HIROSHI ,  ONISHI KEIJI ,  NAKAMURA HIROYUKI

IPC分类号： H03H9/56 ,  H01L41/09 ,  H03H9/17 ,  H03H9/70

CPC分类号： H03H9/0095 ,  H03H9/0004 ,  H03H9/0207 ,  H03H9/02157 ,  H03H9/564

公开(公告)号：EP2477332A4

公开(公告)日：2013-12-25

申请号：EP10815120

申请日：2010-08-30

申请人： PANASONIC CORP

发明人： GOTO REI ,  NAKANISHI HIDEKAZU ,  NAKAMURA HIROYUKI

IPC分类号： G01N29/02 ,  H03H9/02

CPC分类号： H03H9/0222 ,  G01N29/022 ,  G01N2291/0423 ,  H03H9/02818 ,  H03H9/02984

摘要： An acoustic wave element includes a piezoelectric body, an input IDT electrode, an output IDT electrode, a propagation path provided between the input IDT electrode and the output IDT electrode, a first dielectric layer provided on the piezoelectric body so as to cover the input IDT electrode and the output IDT electrode, and a reactive portion provided on the propagation path and reacting to a substance to be detected or a binding substance that binds with the substance to be detected. The main acoustic wave becomes, in the input IDT electrode and the output IDT electrode, a boundary acoustic wave that propagates between the piezoelectric body and the first dielectric layer, and becomes, in the propagation path, a surface acoustic wave that propagates on an upper surface of the propagation path. With this structure, deterioration of the element characteristic is suppressed.

公开(公告)号：EP2058946A4

公开(公告)日：2013-04-03

申请号：EP07831620

申请日：2007-11-12

申请人： PANASONIC CORP

发明人： NAKAMURA HIROYUKI ,  MATSUNAMI KEN ,  TSURUNARI TETSUYA ,  NAKANISHI HIDEKAZU

IPC分类号： H03H9/145 ,  H01L41/09 ,  H01L41/18 ,  H01L41/22 ,  H01L41/23 ,  H01L41/29 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72

CPC分类号： H03H9/6496 ,  H03H9/725

摘要： A surface acoustic wave filter comprised of a plurality of surface acoustic wave resonators having different resonance frequencies, the filter comprising a substrate made of a lithium niobate, comb electrodes (1201 and 1202) formed on the substrate, and a thin dielectric film covering the comb electrodes (1201 and 1202), wherein the surface acoustic wave resonator having a lower resonance frequency is formed to have a metallization ratio larger than a metallization ratio of the surface acoustic wave resonator having a higher resonance frequency, thereby providing the surface acoustic wave filter and an antenna duplexer featuring superior characteristics with insignificant ripples while suppressing spurious responses of the surface acoustic wave resonators.