Patent ID: 6545387
Filing Date: 2003-04-08
Classification: C01G,C01P,C30B

Abstract:
A surface acoustic wave filter comprising a piezoelectric single crystal substrate and two interdigital transducer (IDT) electrodes formed thereon, characterized in that the substrate has the composition of formula (I):x(A)y(B)z(C)â€”p(P)n(N)â€ƒâ€ƒ(I) wherein,(A) is Pb(Mg1/3Nb2/3)O3 or Pb(Zn1/3Nb2/3)O3, (B) is PbTiO3, (C) is LiTaO3, (P) is a metal selected from the group consisting of Pt, Au, Ag, Pd and Rh, (N) is an oxide of a metal selected from the group consisting of Ni, Co, Fe, Sr, Sc, Ru, Cu and Cd, x is a number in the range of 0.65 to 0.98, y is a number in the range of 0.01 to 0.34, z is a number in the range of 0.01 to 0.1, p is a number in the range of 0.01 to 5, and n is a number in the range of 0.01 to 5.