Patent ID: 7126260

Claim:
A surface mount crystal unit, comprising: a substrate for surface-mounting; a pair of connecting electrodes disposed on a principal surface of said substrate; a crystal blank having excitation electrodes and extension electrodes extending from said excitation electrodes to respective opposite sides of an end of said crystal blank, said opposite sides being fixed to said connecting electrodes by an electrically conductive adhesive; and a ridge corresponding to said end of the crystal blank and disposed on said substrate in spaced relation to said connecting electrodes, said ridge having a height greater than a thickness of said connecting electrodes, wherein at least an outer portion of said ridge is an insulating material having a high bonding strength with respect to said electrically conductive adhesive; said electrically conductive adhesive being applied to said connecting electrodes, a spacing between said connecting electrodes and said ridge, and an upper surface of said ridge, wherein said electrically conductive adhesive is joined to said principal surface of the substrate at said spacing between said connecting electrodes and said ridge; said crystal blank having an opposite end which remains lifted about said ridge from said principal surface of said substrate under shrinking forces of said electrically conductive adhesive.