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US 6,887,412 B1Granted
Composite magnetic sheet and method of producing the same
AssigneeNEC Tokin Corporation
InventorNorihiko Ono
Life of this patent
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Abstract
In a method of producing a composite magnetic body, flat soft magnetic powder subjected to annealing to be free from stress strain is prepared and mixed with a binder and a solvent for dissolving the binder to form a slurry-like mixture. The mixture is formed into a film. Then, the solvent is removed. Thus, a sheet of the composite magnetic body is produced.
Claims14
A method of producing a composite magnetic body, comprising the steps of:
- preparing flat soft magnetic powder;
- subjecting said flat soft magnetic powder to annealing to be free from stress strain;
- mixing, after the annealing step, said flat soft magnetic powder with a binder and a solvent suitable for processing said binder, the mixing step producing a slurry-like mixture;
- forming said slurry-like mixture into a film;
- and
- removing said solvent from said film to produce a sheet of said composite magnetic body.
3 more elements
A method of producing a planar composite magnetic body, comprising the steps of:
- preparing flat soft magnetic powder;
- subjecting said flat soft magnetic powder to annealing to be free from strain of said flat soft magnetic powder;
- mixing, after the annealing step, said flat soft magnetic powder, a binder, and a solvent, said solvent suitable for further processing said binder, to produce a slurry-like mixture;
- forming said slurry-like mixture into a film;
- and
- removing said solvent from said film to produce said planar composite magnetic body,
- wherein said binder is chlorinated polyethylene.
4 more elements
A method of producing a composite magnetic body, comprising the steps of:
- preparing flat soft magnetic powder;
- subjecting said flat soft magnetic powder to annealing to be free from strain of said flat soft magnetic powder;
- mixing, after the subjecting step, said flat soft magnetic powder, a binder, and a solvent suitable for dissolving said binder, the mixing step producing a slurry-like mixture;
- forming said slurry-like mixture into a film;
- removing said solvent from said film to produce said composite magnetic body in the form of a sheet, and
- pressing said sheet in a direction perpendicular to a plane of said sheet without inducing stress strain in said powder.
3 more elements
Dependencies are inferred from the claim text.