Band-pass filter device, method of manufacturing same, television tuner, and television receiver
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 20, 2011
Grant Date -
Sep 24, 2009
app pub date -
Mar 13, 2009
filing date -
Mar 18, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A band-pass filter device includes: a plurality of band-pass filter elements on a principal plane of a substrate; wherein the band-pass filter elements correspond to a plurality of respective channels divided by frequency regions, and each have a plurality of piezoelectric resonators. Each of the piezoelectric resonators includes a piezoelectric film whose periphery is supported by the substrate, a first electrode formed on a lower surface of the piezoelectric film, a second electrode formed on an upper surface of the piezoelectric film and formed in a state of overlapping at least a part of the first electrode with the piezoelectric film interposed between the second electrode and the first electrode, a lower space formed between the substrate and the piezoelectric film, and an upper space formed over the piezoelectric film.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 8 Citation Count
- H04N Class
- 3.38 % this patent is cited more than
- 14 Age
