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AssigneeNihon Dempa Kogyo Co., Ltd.
InventorShunsuke Ueno
Estimating the term…
Tuning-fork type quartz-crystal vibrating pieces are disclosed that exhibit low CI and low interconnection resistance. An exemplary vibrating piece includes vibrating arms extending in a predetermined direction from a base, respective excitation electrodes, a base connected to the vibrating arms, respective supporting arms disposed outboard of respective vibrating arms and extending from the base in the predetermined direction, and respective extraction electrodes connected to respective excitation electrodes. Each excitation electrode comprises two metal layers, including a first metal layer comprising at least one metal selected from Cr, Ni, Ti, Al and W, and a second metal layer overlying the first metal layer and comprising Au or Ag. Each extraction electrode comprises four metal layers, namely the first and second metal layers, a third metal layer overlying the second metal layer and comprising at least one metal selected from Cr, Ni, Ti, Al and W, and a fourth metal layer overlying the third metal layer and comprising Au or Ag.
A tuning-fork type quartz-crystal vibrating piece contained inside a package and bonded to respective connecting electrodes inside the package, the vibrating piece comprising:
A tuning-fork type quartz-crystal vibrating piece including an outer frame bonded peripherally to a package base and including respective connecting electrodes, the vibrating piece comprising:
Dependencies are inferred from the claim text.