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US 2006/0066432 A1Published application
Magnetic element
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTsutomu Inuzuka
Life of this patent
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Abstract
A magnetic element superior in high frequency characteristics is provided that comprises magnetic ferrite having iron oxide, cobalt oxide and zinc oxide as the main ingredients, a conducting coil formed over the magnetic ferrite, an insulating material covering the conducting coil, and two or more external electrodes connected with the conducting coil.
Claims6
A magnetic element comprising:
- a rod-shaped sintered insulator of magnetic ferrite;
- a conducting coil formed around the sintered insulator;
- two external electrodes connected to the conducting coil
- wherein the insulator is made by firing mixed powder main ingredients of the mixed powder including:
- 41 to 50 mol % of iron oxide when converted to Fe2O3;
- 3 to 16 mol % of zinc oxide when converted to ZnO;
- and
- cobalt oxide.
5 more elements
2-3. (canceled)
An impedance element comprising:
- a sintered insulator of magnetic ferrite;
- a conducting coil provided in a meander shape or a spiral shape inside the magnetic insulator;
- and
- two external electrodes connected to the conducting coil,
- wherein the insulator is made by firing mixed powder, main ingredients of the mixed powder including:
- 41 to 50 mol % of iron oxide when converted to Fe2O3;
- 3 to 16 mol % of zinc oxide when converted to ZnO;
- and
- cobalt oxide.
6 more elements
A common-mode noise filter comprising:
- a ring-shaped core made of sintered magnetic ferrite;
- two conducting coils wound in the same direction around the core;
- and
- four external electrodes connected to the coils,
- wherein the core is made by firing mixed powder, main ingredients of the mixed powder including:
- 41 to 50 mol % of iron oxide when converted to Fe2O3;
- 3 to 16 mol % of zinc oxide when converted to ZnO;
- and cobalt oxide.
5 more elements
An antenna element comprising:
- a cylindrical core made of sintered magnetic ferrite;
- a conducting coil spirally wound around the cylindrical core;
- and
- a threaded connecting section on one end of the core,
- wherein the core is made by firing mixed powder, main ingredients of the mixed powder including:
- 41 to 50 mol % of iron oxide when converted to Fe2O3;
- 3 to 16 mol % of zinc oxide when converted to ZnO;
- and
- cobalt oxide.
6 more elements
(canceled)
Dependencies are inferred from the claim text.