ELASTIC WAVE DEVICE - PANASONIC CORP

Title:

ELASTIC WAVE DEVICE

Document Type and Number:

WIPO Patent Application WO/2012/081240

Kind Code:

A1

Abstract:

An elastic wave device comprises a piezoelectric substrate, an IDT electrode which is arranged on the piezoelectric substrate, a wiring electrode which is arranged on the piezoelectric substrate and is connected to the IDT electrode, a first insulating body which is arranged on the piezoelectric substrate and can seal the IDT electrode and the wiring electrode, a resin layer which is arranged on the first insulating body, an inductor electrode which is arranged on the resin layer, a second insulating body which is arranged on the resin layer and covers the inductor electrode, a terminal electrode which is arranged on the second insulating body, and a connection electrode which penetrates through the first insulating body, the second insulating body and the resin layer and electrically connects the wiring electrode, the terminal electrode and the inductor electrode to one another. The first insulating body comprises a resin and a filler dispersed in the resin. The density of the filler in the resin layer is smaller than the average density of the filler in the first insulating body. The elastic wave device secures the electric properties of an inductor and can have reduced fluctuations in the electric properties.

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Inventors:

NAKAYAMA HIDEAKI
TAKANO ATSUSHI
FURUKAWA MITSUHIRO

Application Number:

PCT/JP2011/006977

Publication Date:

June 21, 2012

Filing Date:

December 14, 2011

Export Citation:

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Assignee:

PANASONIC CORP (JP)
NAKAYAMA HIDEAKI
TAKANO ATSUSHI
FURUKAWA MITSUHIRO

International Classes:

H03H9/25

Domestic Patent References:

WO2008105199A1	2008-09-04
WO2006134928A1	2006-12-21
WO2005055423A1	2005-06-16

Foreign References:

JP2001217674A	2001-08-10
JPH08330890A	1996-12-13

Attorney, Agent or Firm:

NAITO, Hiroki et al. (JP)
Hiroki Naito (JP)

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