| 摘要 |
PROBLEM TO BE SOLVED: To secure conduction between a resonator and a conductive land on a printed board in a laminated piezoelectric filter the thickness of which can be made thinner, the resonator of which is electrically and mechanically protected and which is easily manufactured and assembled. SOLUTION: A conductive paste 20 is formed so that it protrudes from the surface of the printed board 30 on the conducive land 14 of an electrode pattern 13 formed on the surface of the printed board 30 to be connected with electrodes of the resonators S, P, the conductive land 14 and the electrodes of the resonators S, P are conducted via the conductive paste 20. Thus, the electrode pattern 13 is formed by Au plating, its surface is like a smooth mirror surface, the conductive paste 20 is easily peeled on the conductive land 14, however, since a part of the conductive paste 20 protrudes from the surface of the printed board 30 and its surface is rough, its protruding part 21 is coupled with the surface of the printed board 30 by proper joining force, thus, peeling of the conductive paste 20 is prevented and the conductive paste 20 is stably formed on the conductive land part.
|
