| 摘要 |
PROBLEM TO BE SOLVED: To reduce height dimensions of a surface mounting crystal device hermetically sealed by seam welding. SOLUTION: In the surface mounting piezoelectric device wherein at least a crystal piece 2 is stored in a recessed container main body 1 made of laminated ceramics and the extended outer peripheral part of a drawing electrode of the crystal piece 2 is fixed by a conductive adhesive 10 and a metallic cover 3 is joined to a metallic ring 6 provided to the opening end face of the container main body 1, the metallic ring 6 is partially buried in the opening end face of the container main body 1 and has its tip end side projected. Joining strength can be maintained same as conventional devices because of seam welding using the metallic ring. Since the metallic ring 6 is partially buried in the opening end face, height dimensions can be reduced. Since a part of the side face where the metallic ring 6 is buried is not exposed, electric short circuit to an excess portion of the conductive adhesive can be prevented. COPYRIGHT: (C)2009,JPO&INPIT
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