| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystal device for surface mounting whose productivity is enhanced by surely positioning a metal cover. SOLUTION: In the crystal device for surface mounting formed by housing at least a quartz crystal piece 2 in a recessed container body 1 which has a bottom surface 1a and a frame wall 1b formed of laminated ceramic and is rectangular in a planar view, providing a metal film 6 having a ground electrode 6a at an opened end face of the container body 1, and connecting a metal cover 3 over the metal film 6 separately from an outer circumferential end of the opened end face to hermetically seal the of the quartz crystal piece 2, projections 10 for positioning the metal cover 3 are formed at least on four respective sides on an outer circumferential surface to be an outer side of the metal cover 3 of the opened end face in the container body, and the projections 10 include outer circumferential ends of the outer circumferential surfaces and are lower than the metal cover 3 in height. COPYRIGHT: (C)2009,JPO&INPIT
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