Multilayer coil component and method for manufacturing the same

A technology for stacking coils and components, which is applied in the manufacture of coils, electrical components, inductors/transformers/magnets, etc., can solve the problems of easy peeling and poor adhesion, and achieve the effect of suppressing cracks or delamination

Inactive Publication Date: 2009-01-28
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the layer with high magnetic permeability and the layer with low magnetic permeability have poor adhesion and are easy to peel off, in the laminated coil component described in Patent Document 1, an insulating layer with low magnetic permeability and a layer with high magnetic permeability are separated. Cracks (cracks) or delamination (delamination) will occur between insulating layers

Method used

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  • Multilayer coil component and method for manufacturing the same
  • Multilayer coil component and method for manufacturing the same
  • Multilayer coil component and method for manufacturing the same

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Embodiment Construction

[0027] Hereinafter, an embodiment of an open magnetic circuit type laminated coil component and a manufacturing method thereof according to the present invention will be described with reference to the drawings. The embodiment of the present invention takes the case of a single product as an example, but in mass production, a plurality of internal conductor patterns are printed on the surface of the mother ceramic green sheet, and multiple pieces of the mother ceramic green sheet are laminated and crimped to form Unfired laminate block. Then, the laminated body block is cut according to the configuration of the internal conductor pattern, thereby cutting out laminated ceramic chips one by one, the cut out laminated ceramic chips are fired, and external electrodes are formed on the fired laminated ceramic chips. This is how it goes into production. Alternatively, the mother ceramic green sheets may be laminated and crimped, fired, and then laminated ceramic sheets may be cut o...

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Abstract

A closed magnetic path type multilayer coil component in which cracking or delamination hardly occurs between layers of different permeabilities. A first ceramic sheet (2) on which a conductor pattern (5) for coil is formed and a third ceramic sheet (4) having a permeability lower than that of the first ceramic sheet (2) are laminated, and the conductor patterns (5) for coil are interconnected electrically to constitute a coil being incorporated in a multilayer coil component (1). The third ceramic sheet (4) is sandwiched by the first ceramic sheets (2). A cavity (7) is formed in a major surface of the third ceramic sheet (4) and the first ceramic sheet (2) adjoining the third ceramic sheet (4) is in contact with the inner circumferential surface of the cavity (7).

Description

technical field [0001] The present invention relates to a laminated coil element, and more particularly relates to laminating a magnetic material layer forming a coil conductor and a low magnetic permeability layer having a lower magnetic permeability than the magnetic material layer, and incorporating the coil conductors by electrically connecting them to each other. The laminated coil element which constitutes the coil and its manufacturing method. Background technique [0002] Among the laminated coil components, there are closed magnetic circuit type laminated coil components and open magnetic circuit type laminated coil components. The closed magnetic circuit type laminated coil element has the advantage of being able to obtain a large inductance because it forms a magnetic circuit with a large magnetic permeability and a small magnetic resistance. On the other hand, in a closed magnetic circuit type laminated coil element, since a large magnetic flux density is genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/00H01F17/02H01F41/04
CPCH01F2017/048H01F17/04H01F17/0013H01F41/046
Inventor 山口公一
Owner MURATA MFG CO LTD
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