Patent ID: 7538057

Claim:
A ceramic electronic device having a dielectric layer, wherein: said dielectric layer includes a main component containing a (Ba, Ca)(Ti, Zr)O 3 based material and a subcomponent containing an oxide of Si; and a content of said Si oxide is 0 to 0.4 wt%, note that 0 is not included, with respect to the entire dielectric layer; wherein said dielectric layer has a segregation phase; and said segregation phase contains an oxide of Si, and contains 0.001 mol% or less of an oxide of Li; and said (Ba, Ca)(Ti, Zr)O 3 based material is a material expressed by a composition formula {{Ba (1-x) Ca x }O} A {Ti (1-y-z) Zr y Mg z } B O 2 (note that A, B, x, y and z are 0.995≦A/B≦1.020, 0.0001≦x≦0.07, 01≦y≦0.3 and 0.0005≦z≦0.01).