Importance

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Abstract

The invention concerns a resonator (1) with at least one crystal (2, 2'), at least two electrodes (3, 3', 4, 4') exciting the crystal (2, 2'), and a sandwich housing (5, 5') with a substantially plate-shaped bottom (6), at least one frame-like central portion (7, 7') which surrounds the crystal (2, 2') and supports it in a pendular fashion, and a substantially plate-shaped lid (8), wherein these housing sections (6, 7, 7', 8) are interconnected by means of sealing surfaces (13, 14, 15, 16), with the inclusion of conducting layers (9 and 9', 10 and 10'; 11, 12) and each electrode (3, 4; 3', 4') is connected to conductive layers (9 and 9', 10 and 10';11, 12). The resonator in accordance with the invention is configured in such a fashion that it can be further processed using SMD technology. Towards this end, at least two conductive surfaces (17, 18, 19, 20) extend on at least one side of the housing (5, 5') to the foot (21) of the bottom (6) in such a manner that the bottom can be soldered to a printed circuit (22), wherein each of the conductive layers (9 and 9', 10 and 10'; 11, 12) are interrupted outside of the sealing surfaces (13, 14, 15, 16) for electrical isolation.

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First Claim