Title:
【発明の名称】積層磁心及び積層磁心の製造方法
Document Type and Number:
Japanese Patent JPH0821494
Kind Code:
B2
Abstract:
A laminated magnetic core is characterized in that core-forming thin sheets each having a surface roughness such that the maximum height Rmax is at least 1 mu m are laminated together with a sheet-to-sheet distance of 2 to 10 mu m, desirably 3 to 6 mu m and that at least a part of protruded portions of the opposite roughed surfaces is diffusion-bonded to each other at the interface between adjacent thin sheets. The laminated magnetic core may have innumberable voids present at the diffusion-bonded interface between the adjacent thin sheets. This invention further provides a method of manufacturing a laminated magnetic core comprising the steps of providing a plurality of core-forming thin sheets each having a surface roughness such that the maximum height Rmax is at least 1 mu m; laminating and bonding said core-forming thin sheets one upon another through an organic adhesive, desirably at a sheet-to-sheet distance of 2 to 10 mu m; punching out a block of a given shape from said laminated and bonded core-forming sheets by a press; and thereafter magnetically annealing the block while decomposing and vaporizing said organic adhesive to effect diffusion-bonding at the interface between adjacent thin sheets of the block lefting innumberable voids at the interface.
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Inventors:
Norio Yuki
Application Number:
JP19345888A
Publication Date:
March 04, 1996
Filing Date:
August 04, 1988
Export Citation:
Assignee:
Nikko Metal Co., Ltd.
International Classes:
G11B5/147; H01F3/02; H01F41/02; (IPC1-7): H01F3/02; G11B5/147; H01F41/02
Domestic Patent References:
| JP5769522A |
Attorney, Agent or Firm:
Takuo Murai (1 outside)
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