Coil parts

The coil component's ultraviolet curable resin with oriented fillers addresses cracking issues by maintaining thickness and reducing stress, enhancing reliability under thermal shock tests.

JP7612500B2Active Publication Date: 2025-01-14MURATA MFG CO LTD
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Patent Information

Application Number
JP2021073700
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-04-24
Publication Date
2025-01-14
Estimated Expiration
2041-04-24

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Patent Text Reader

Abstract

To provide a coil component in which a cover member provided for covering a core from a top surface of a first flange part to a top surface of a second flange part is less likely to be cracked because of an ensured thickness over the top surfaces of the flange parts.SOLUTION: A cover member 25 contains ultraviolet-curable resin 26 and a filler 27 made up of flat particles each having a major axis and a minor axis. Preferably, talc particles are used as the filler 27. The filler 27 contained in a portion of the cover member 25 covering a top surface 17 of a flange part 5 is configured such that an extension direction of its major axis is oriented in parallel or substantially parallel to an extension direction of the top surface 17. On a cross section of the cover member 25 which extends along a surface passing through a center axis of a winding core part and perpendicular to the top surface 17, the filler 27 contained in the portion of the cover member 25 covering the top surface 17 has an area ratio ranging from 15.0 to 50.1%, and a particle diameter of the filler 27 ranges from 1 to 30 μm at D50.SELECTED DRAWING: Figure 2
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Citation Information

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