Title:
ELASTIC WAVE FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/046481
Kind Code:
A1
Abstract:
An elastic wave filter device with little manufacturing variation in terms of filter characteristics is provided. The elastic wave filter device (1) comprises a first and a second signal terminal (21,24), an inductor (L4), and a ladder-type elastic wave filter portion (14A). The elastic wave filter device (1) comprises a elastic wave filter chip (17) in which the ladder-type elastic wave filter portion (14A) is provided, and a circuit board (18). The circuit board (18) has a plurality of dielectric material layers (41~43) and a plurality of electrode layers (44~47), which are alternately layered. An inductor electrode (45d) and a ground electrode (25) are formed so as not to oppose one another across the dielectric material layer (41).
Inventors:
OTA NORIYOSHI (JP)
Application Number:
PCT/JP2011/065550
Publication Date:
April 12, 2012
Filing Date:
July 07, 2011
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
OTA NORIYOSHI (JP)
OTA NORIYOSHI (JP)
International Classes:
H01L41/09; H03H9/25; H01L41/18; H03H9/64
Domestic Patent References:
| WO2007102560A1 | 2007-09-13 | |||
| WO2008146525A1 | 2008-12-04 |
Foreign References:
| JP2010178380A | 2010-08-12 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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