Patent ID: 6991742
Filing Date: 2006-01-31
Classification: C04B,H01F

Abstract:
1. A coil component comprising a core of a Mn—Zn ferrite containing as basic components 44.0 to 50.0 mol % (50.0 mol % excluded) Fe 2 O 3 , 4.0 to 26.5 mol % ZnO, and remainder MnO, and having a dielectric loss tan δ of 0.3 or less at 1 kHz, and a complex relative permittivity ε of 1,000 or less at 1 MHz, wherein the Mn—Zn ferrite is a body that has been sintered in atmosphere having an oxygen concentration obtained according to the following expression: in which T is temperature (° C), PO 2 is relative partial pressure of oxygen and b is a constant ranging from 6 to 21; and further containing as additives at least one of 0.01 to 0.2 mass % CaO, 0.005 to 0.05 mass % SiO