Magnetic powder, forming method thereof and magnetic sheet
AssigneeNEC Tokin Corporation
InventorToshiyuki Igarashi
Life of this patent
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Abstract
A magnetic powder comprises a first magnetic particle, one or more inorganic insulating particles and one or more second magnetic particles. The first magnetic particle is made of a soft magnetic metal. The first magnetic particle has a flat shape. The inorganic insulating particles are attached to the first magnetic particle. The inorganic insulating particles partially cover the first magnetic particle. Each of the second magnetic particles is made of a soft magnetic metal. Each of the second magnetic particles has a flat shape. The second magnetic particles are attached to the first magnetic particle via the inorganic insulating particles.
Claims10
A magnetic powder comprising:
- a first magnetic particle made of a soft magnetic metal, the first magnetic particle having a flat shape;
- one or more inorganic insulating particles attached to the first magnetic particle, the inorganic insulating particles partially covering the first magnetic particle;
- and
- one or more second magnetic particles each made of a soft magnetic metal, each of the second magnetic particles having a flat shape, the second magnetic particles being attached to the first magnetic particle via the inorganic insulating particles.
A forming method of a magnetic powder comprising:
- preparing a mixture of a metal powder and an inorganic insulator, the metal powder being made of a soft magnetic metal, the inorganic insulator being made of a glass material;
- putting the mixture into a flattening device;
- and
- flattening the metal powder by using the flattening device to obtain a magnetic particle which has a flat shape and is attached with one or more of inorganic insulating particles formed from the inorganic insulator.
A magnetic sheet having flexibility, the magnetic sheet comprising:
- a plurality of magnetic powder particles, each of the magnetic powder particles including a first magnetic particle made of a soft magnetic metal, one or more inorganic insulating particles and one or more second magnetic particles each made of a soft magnetic metal, the first magnetic particle having a flat shape, the inorganic insulating particles being attached to the first magnetic particle, the inorganic insulating particles partially covering the first magnetic particle, each of the second magnetic particles having a flat shape, the second magnetic particles being attached to the first magnetic particle via the inorganic insulating particles;
- and
- a binder made of a polymer, the binder binding the magnetic powder particles so as to generate the flexibility of the magnetic sheet.
Dependencies are inferred from the claim text.