H - Electricity – 01 – L
Patent
H - Electricity
01
L
H01L 41/187 (2006.01) B32B 18/00 (2006.01) C04B 35/01 (2006.01) H01L 41/083 (2006.01) G10K 9/122 (2006.01) H02N 2/00 (2006.01)
Patent
CA 2561615
For the purpose of preventing the degradation of the piezoelectric strain properties when Cu is used for internal electrodes, there is provided a piezoelectric ceramic composition including: a composite oxide, as a main constituent thereof, represented by (Pb a- b Me b) [ (Zn1/3Nb2/3)x Ti y Zr z]O3 with the proviso that 0.96 <= a <= 1.03, 0 5 b <= 0.1, 0.05 <= x <= 0.15, 0.25 <= y <= 0.5, 0.35 <= z <= 0.6, and x + y + z = 1, and Me represents at least one selected from Sr, Ca and Ba; and at least one selected from Co, Mg, Ni, Cr and Ga as a first additive to the main constituent in a content of 0.5% by mass or less (not inclusive of 0) in terms of oxide, wherein an electrode made of Cu is to be disposed on the piezoelectric ceramic composition.
Iezumi Kumiko
Nanao Masaru
Sakamoto Norimasa
Sogabe Tomohiro
Tsukada Takeo
Riches Mckenzie & Herbert Llp
Tdk Corporation
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