Patent ID: 7969071
Filing Date: 2011-06-28
Classification: H03H

Abstract:
1. A crystal unit for surface mounting comprising: a container body having a recess; a pair of holding terminals formed on an inner bottom surface of the recess; and a crystal blank provided with excitation electrodes on both principal surfaces thereof, having a first end and a second end with lead-out electrodes extending from the pair of excitation electrodes toward both sides of the first end, wherein both sides of the first end of the crystal blank are fixed to the holding terminals using a conductive adhesive, pillow members protruding from the inner bottom surface are provided on the inner bottom surface of the recess at positions corresponding to corners on both sides of the second end of the crystal blank, each of the pillow members having a two-layer structure of conductive material which comprises a first layer provided on the inner bottom surface and a second layer provided on the first layer, a bank having a thickness lower than a thickness of the pillow members is provided on the inner bottom surface of the recess at an intermediate position between the pair of pillow members, the bank is formed as an exposed part of the first layer, the holding terminals and the pillow members are formed on the inner bottom surface at the same time, the first layer is formed common to and continuous between the pair of pillow members and the second layer provided on the first layer for each of the pillow members.