Invention Grant
- Patent Title: Acoustic wave filter
- Patent Title (中): 声波滤波器
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Application No.: US13344274Application Date: 2012-01-05
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Publication No.: US09231553B2Publication Date: 2016-01-05
- Inventor: Kazunori Inoue , Takashi Matsuda , Michio Miura
- Applicant: Kazunori Inoue , Takashi Matsuda , Michio Miura
- Applicant Address: JP Tokyo
- Assignee: TAIYO YUDEN CO., LTD.
- Current Assignee: TAIYO YUDEN CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Chen Yoshimura LLP
- Priority: JP2009-223283 20090928
- Main IPC: H03H9/02
- IPC: H03H9/02 ; H03H9/72 ; H03H9/64

Abstract:
A configuration that reduces a parasitic capacitance between wires is achieved at a low cost. Disclosed is an acoustic wave filter provided with a piezoelectric substrate, resonators that include a comb-shaped electrode formed on the piezoelectric substrate, a wiring portion that is connected to the comb-shaped electrode, and a dielectric layer formed to cover the comb-shaped electrode. The wiring portion is provided with a lower layer wiring portion that is disposed in the same layer as the comb-shaped electrode and an upper layer wiring portion that is disposed on the lower layer wiring portion. The upper layer wiring portion includes a region that has a wider electrode width than the electrode width of the lower layer wiring portion.
Public/Granted literature
- US20120105298A1 ACOUSTIC WAVE FILTER Public/Granted day:2012-05-03
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