Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1996-01-19
1999-11-16
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Electromechanical filter
333190, H03H 900
Patent
active
059865229
ABSTRACT:
A piezoelectric filter is one not changing in the holding position of resonator in spite of impulse, small in the number of parts, easy to assemble from one direction, small, thin, and stable in characteristic. For example, as shown in FIG. 7, on electrode patterns on a package 10 forming wiring electrode patterns 11, holding protrusions 13 for holding resonators, and partition boards 14 for positioning resonators, a rectangular plate type piezoelectric resonators 12 are adhered with conductive adhesive. The rectangular plate type piezoelectric resonators 12 and the package 10 are adhered and reinforced from above with a vibration absorbing member 15, and wiring is formed from above the resonators by a wire bonding 16, thereby wiring resonators in a ladder form. Or, as shown in FIG. 11, after forming electrode patterns 102 on a piezoelectric substrate 101, a rectangular plate resonator 104 is cut out from a piezoelectric substrate 101 by laser in a shape consecutive to the piezoelectric substrate 101 by the node of length expander mode, and the piezoelectric substrate 101 is enclosed by a spacer 106 and a sheet 107 from above and beneath.
REFERENCES:
patent: 4607230 (1986-08-01), Kaku et al.
patent: 4651109 (1987-03-01), Inoue
patent: 4716377 (1987-12-01), Inoue
patent: 4837533 (1989-06-01), Oshikawa
patent: 4841264 (1989-06-01), Oshikawa
patent: 5077544 (1991-12-01), Ogawa et al.
patent: 5332982 (1994-07-01), Kawakami
patent: 5351021 (1994-09-01), Masaie et al.
patent: 5559481 (1996-09-01), Satoh et al.
Takeshi Inoue et al., "Construction Method for Ladder Filters Employing Piezoelectric Ceramic Resonators", Transactions of the IECE of Japan, vol. E69, No. 7, Jul. 1986, pp. 788-795.
Copy of Communication, European Search Report No. EP 96100701 dated Mar. 13, 1998, and Annex.
Patent Abstracts of Japan vol. 008, No. 268 (E-283), Dec. 7, 1984, & JP 59-140713A (Murata Seisakusho:KK), Aug. 13, 1984.
Asakawa Yasuteru
Ise Yukihiko
Ishizaki Toshio
Kawasaki Osamu
Kosugi Hiroaki
Ham Seungsook
Matsushita Electric - Industrial Co., Ltd.
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