JP2022112728A - 積層コイル部品およびその製造方法 - Google Patents
積層コイル部品およびその製造方法 Download PDFInfo
- Publication number
- JP2022112728A JP2022112728A JP2021008636A JP2021008636A JP2022112728A JP 2022112728 A JP2022112728 A JP 2022112728A JP 2021008636 A JP2021008636 A JP 2021008636A JP 2021008636 A JP2021008636 A JP 2021008636A JP 2022112728 A JP2022112728 A JP 2022112728A
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- JP
- Japan
- Prior art keywords
- soft magnetic
- epoxy resin
- mass
- coil component
- laminated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Images
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
Description
前記磁性素体は軟磁性粒子およびエポキシ樹脂を含み、
前記軟磁性粒子は軟磁性金属粒子を有し、
前記エポキシ樹脂はエポキシ価が150以下であり、
前記エポキシ樹脂が前記軟磁性粒子間の隙間スペースに充填される積層コイル部品である。
エポキシ価が150以下であるエポキシ樹脂を前記素子に含浸する工程を含む積層コイル部品の製造方法である。
まず、原料として、Fe単体およびSi単体をそれぞれ準備した。次に、それらを混合して、水アトマイズ装置内に配置されたルツボに収容した。続いて、不活性雰囲気下において、ルツボ外部に設けたワークコイルを用いて、ルツボを高周波誘導により1600℃以上まで加熱し、ルツボ中のインゴット、チャンクまたはショットを溶融、混合して溶湯を得た。なお、リンの含有量の調整は、軟磁性金属粉末の原料を溶融、混合する際に、Fe単体の原料に含まれるリンの量を調整することで行った。
実験例2では、JER630と実験例1で用いた他のエポキシ樹脂とを混合させた点以外は実験例1の試料番号4と同様にして実施した。結果を表2に示す。なお、表2に記載した実験例は全てエポキシ樹脂のエポキシ価が150以下である。
実験例3では、式(4)に示すシアネート化合物をエポキシ樹脂(JER630)と混合することによる耐熱性および抗折強度の変化を確認した。
2… 素子
3… 端子電極
4… 磁性素体
5… コイル導体
5a,5b…引出電極
11…軟磁性粒子
12…隙間スペース
13…樹脂
14…空隙
Claims (9)
- コイル導体と磁性素体とが積層された素子を有する積層コイル部品であって、
前記磁性素体は軟磁性粒子およびエポキシ樹脂を含み、
前記軟磁性粒子は軟磁性金属粒子を有し、
前記エポキシ樹脂はエポキシ価が150以下であり、
前記エポキシ樹脂が前記軟磁性粒子間の隙間スペースに充填される積層コイル部品。 - 前記エポキシ樹脂が式(1)のエポキシ樹脂を含む請求項2に記載の積層コイル部品。
- 前記軟磁性粒子は軟磁性金属粒子と、前記軟磁性金属粒子を被覆する酸化被膜と、を有する請求項1~3のいずれかに記載の積層コイル部品。
- 前記酸化被膜の平均厚みが5nm以上60nm以下である請求項4に記載の積層コイル部品。
- 前記軟磁性金属粒子におけるFeの含有量が92.5質量%以上97.0質量%以下、Siの含有量が3.0質量%以上7.5質量%以下であり、前記軟磁性金属粒子はCrを実質的に含有しない請求項1~5のいずれかに記載の積層コイル部品。
- 前記コイル導体と前記磁性素体との合計質量に対する前記エポキシ樹脂の質量比率が0.5質量%以上5.0質量%以下である請求項1~6のいずれかに記載の積層コイル部品。
- コイル導体と磁性素体とが積層された素子を有する積層コイル部品の製造方法であって、
エポキシ価が150以下であるエポキシ樹脂を前記素子に含浸する工程を含む積層コイル部品の製造方法。
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