Patent Number: 6,251,299

Title: Magnetic material, inductance element using the same and manufacturing method thereof

Abstract: Magnetic material has a ceramics having a composition in the range of Fe2O3 35.0 to 44.5 mol %, NiO 47.0 to 56.5 mol % and CuO 5.0 to 12.0 mol %, and the ceramics having relative magnetic permeability of 15 or less, and composes the inductance element comprising this magnetic material and the internal metallic conductor. For making laminated inductance elements by concurrently baking ceramic green sheets and internal metallic conductors, substances to be used as ceramic green sheets, which substances have the composition in the above mentioned range are used, and a silver or silver alloys are used as the internal metallic conductor, and the calcination is carried out at temperature of 880 to C.

Inventors: Ito; Takashi (Tokyo, JP), Takahashi; Yukio (Tokyo, JP), Uchikoba; Fumio (Tokyo, JP)

Assignee: TDK Corporation

International Classification: C04B 35/26 (20060101); H01F 1/34 (20060101); H01F 41/02 (20060101); H01F 41/04 (20060101); H01F 1/12 (20060101); H01F 001/34 (); H01F 017/00 ()

Expiration Date: 06/26/2018