Patent ID: 7915793

Claim:
A thin film tuning-fork type inflection resonator, comprising: a substrate; a piezoelectric thin film formed into a tuning-fork shape, said piezoelectric film having a supporting part at which the piezoelectric thin film is fixed to the substrate, and further having a vibrating part which is fixed to the substrate only through said supporting part, and which is formed a predetermined distance over the substrate; a first metallic electrode formed on a first surface of said piezoelectric thin film; and a second metallic electrode formed on a second surface of said piezoelectric thin film opposite said first surface of said piezoelectric thin film, wherein said piezoelectric thin film is made of an aluminum nitride or zinc oxide film; wherein said first metallic electrode is deposited as a film on said first surface of said piezoelectric thin film; wherein said piezoelectric thin film is formed so as to cover said second metallic electrode; and wherein a first area of said vibrating part of said piezoelectric thin film is a non-laminate single film of said piezoelectric film; and a second area of said vibrating part of said piezoelectric thin film is laminated with said first metallic electrode and said second metallic electrode.