JP6526471B2 - 軟磁性フィルム - Google Patents
軟磁性フィルム Download PDFInfo
- Publication number
- JP6526471B2 JP6526471B2 JP2015088703A JP2015088703A JP6526471B2 JP 6526471 B2 JP6526471 B2 JP 6526471B2 JP 2015088703 A JP2015088703 A JP 2015088703A JP 2015088703 A JP2015088703 A JP 2015088703A JP 6526471 B2 JP6526471 B2 JP 6526471B2
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- Prior art keywords
- soft magnetic
- resin
- less
- magnetic film
- volume
- 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.)
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- 239000011347 resin Substances 0.000 claims description 54
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- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 2
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- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
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- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
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- MXSVLWZRHLXFKH-UHFFFAOYSA-N triphenylborane Chemical class C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1 MXSVLWZRHLXFKH-UHFFFAOYSA-N 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical class C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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Description
比重(S.G.)は、電子分析天秤(島津製作所社製、「AEL−200」)を用いて、比重測定法により、空気中での軟磁性フィルムの重さW1(g)および水中での軟磁性フィルムW2の重さ(g)を測定して、下記式により算出される。
理論比重は、例えば、軟磁性フィルムを形成する軟磁性樹脂組成物に含まれる固形分成分(軟磁性粒子、樹脂成分、必要に応じて添加される熱硬化触媒、レオロジーコントロール剤およびその他の添加剤など)について、各固形分成分の比重のそれぞれを各固形分成分の配合割合(重量)のそれぞれで乗じ、それらを足し合わせることにより得られる。なお、各固形分成分の比重(例えば、軟磁性粒子)は、カタログ値などを参照することができる。
軟磁性樹脂組成物に対し軟磁性粒子の体積割合が固形分換算で70.0体積%となるように、Fe−Si−Al合金500質量部(70.0体積%、以下の体積%は固形分を示す。)、トリスヒドロキシフェニルメタン型エポキシ樹脂(EPPN−501HY)21.9質量部(17.0体積%)、フェノールノボラック樹脂(LVR8210DL)13.5質量部(10.4体積%)、アクリル酸エステル系共重合体溶液(SG−P3)8.6質量部(1.4体積%)、イミダゾール系化合物(熱硬化触媒、2PHZ−PW)0.36質量部(0.2体積%)、および、ウレア変性ポリアマイド溶液(レオロジーコントロール剤、BYK430)3.0質量部(1.0体積%)を混合することにより、軟磁性樹脂組成物を得た。
表1に記載の材料および配合割合で、軟磁性樹脂組成物を得た。軟磁性樹脂組成物を用いた以外は、実施例1と同様にして、実施例2の軟磁性フィルム(平均厚み150μm)を製造した。
表1に記載の材料および配合割合で、軟磁性樹脂組成物を得た。この軟磁性樹脂組成物を用いた以外は、実施例1と同様にして、比較例の軟磁性フィルムを製造した。
各実施例および各比較例において、軟磁性樹脂組成物を除いた軟磁性除外成分(エポキシ樹脂、フェノール樹脂、アクリル樹脂、熱硬化性触媒、および、レオロジーコントロール剤)を混合し、軟磁性除外組成物を得た。各実施例および各比較例の軟磁性フィルムの製造と同様にして、この軟磁性除外組成物をメチルエチルケトンに溶解させて軟磁性除外組成物溶液を調製し、セパレータ上に塗布および乾燥させ、半硬化状態のフィルムを製造した後、加熱硬化させることにより、軟磁性除外成分からなるフィルム(完全硬化状態)を作製した。
モード:引張モード
昇温速度:10℃/分
周波数:1Hz
サンプル厚み:40〜130μm
チャック間距離:20mm
ひずみ:0.1%
測定温度範囲:0℃〜200℃
この結果を表1に示す。
各実施例および各比較例の軟磁性フィルムの比重(S.G.)を、電子分析天秤(島津製作所社製、「AEL−200」)を用いて、比重測定法により、空気中の軟磁性フィルムでの重さW1(g)と、水中での軟磁性フィルムW2の重さ(g)とをそれぞれ測定し、下記式により算出した。
各実施例および各比較例の軟磁性フィルムを回路基板の一方面に、アクリル系接着剤を介して積層し、軟磁性フィルム積層基板を作製した(図1参照)。この軟磁性フィルム積層基板を、IRリフロー炉内部に260℃10秒間の条件にて通過させることにより、リフロー工程を実施した。
この結果を表1に示す。
・Fe−Si−Al合金:商品名「FME3DH」、軟磁性粒子、扁平状、平均粒子径43μm、平均厚み1μm、比重6.8、山陽特殊製鋼社製
・トリスヒドロキシフェニルメタン型エポキシ樹脂:商品名「EPPN−501HY」、上記一般式(1)のエポキシ樹脂、エポキシ当量169g/eq.、ICI粘度(150℃)0.1Pa・s、比重1.25、日本化薬社製
・クレゾールノボラック型樹脂:商品名「KI−3000−4」、エポキシ当量199g/eq.、ICI粘度(150℃)0.4Pa・s、比重1.21、東都化成社製
・ビスフェノールA型エポキシ樹脂:商品名「エピコートYL980」、エポキシ当量180g/eq.、ICI粘度(150℃)0.05Pa・s、比重1.15、三菱化学社製
・フェノールノボラック樹脂:商品名「レヂトップLVR8210DL」、水酸基当量104g/eq.、ICI粘度(150℃)0.03Pa・s、比重1.2、群栄化学工業社製
・フェノールビフェニレン樹脂:商品名「MEH−7851SS」、水酸基当量203g/eq.、ICI粘度(150℃)0.05Pa・s、比重1.18、明和化成社製
・SG-P3:アクリル酸エステル系共重合体溶液、商品名「テイサンレジン SG−P3」、エポキシ基含有のアクリル酸エチル−アクリル酸ブチル−アクリロニトリル共重合体、比重0.85、重量平均分子量850,000、エポキシ価210eq./g、ガラス転移温度12℃、ゴム含有割合15質量%、溶媒:メチルエチルケトン、ナガセケムテックス社製
・SG−70L:アクリル酸エステル系共重合体溶液、商品名「テイサンレジン SG−70L」、カルボキシ基およびヒドロキシ基含有のアクリル酸エチル−アクリル酸ブチル−アクリロニトリル共重合体、比重1.00、重量平均分子量900,000、ガラス転移温度−13℃、ゴム含有割合12.5質量%、溶媒:メチルエチルケトンおよびトルエンの混合液、ナガセケムテックス社製
・2PHZ−PW:熱硬化触媒、2−フェニル−1H−イミダゾール4,5−ジメタノール、比重1.33、商品名「キュアゾール2PHZ−PW」、四国化成社製
・BYK430:商品名、レオロジーコントロール剤、ウレア変性中極性ポリアマイド、比重0.86、固形分30質量%、イソブチルアルコールおよびソルベントナフサの混合液、ビックケミージャパン社製
7 軟磁性粒子
Claims (3)
- 軟磁性樹脂組成物から形成される軟磁性フィルムであって、
前記軟磁性樹脂組成物が、扁平状の軟磁性粒子および樹脂成分を含有し、
前記樹脂成分が、エポキシ樹脂、フェノール樹脂およびアクリル樹脂を含有し、
前記エポキシ樹脂が、多官能モノマー型エポキシ樹脂を含み、
前記フェノール樹脂が、フェノールノボラック樹脂を含み、
前記アクリル樹脂が、エポキシ基を有し、
前記アクリル樹脂のガラス転移温度が、0℃以上であり、
前記軟磁性樹脂組成物に対する前記軟磁性粒子の体積割合が、固形分換算で、65体積%以上であり、
前記軟磁性フィルムの空隙率が、2.5体積%以下であることを特徴とする、軟磁性フィルム。 - 前記樹脂成分に対する前記アクリル樹脂の体積割合が、10体積%以下であることを特徴とする、請求項1に記載の軟磁性フィルム。
- 前記軟磁性樹脂組成物から前記軟磁性粒子を除外した軟磁性粒子除外成分の動的粘弾性測定における昇温速度10℃/分、周波数1Hzでの160℃の引張貯蔵弾性率E´が、5.5×108Pa以上であることを特徴とする、請求項1または2に記載の軟磁性フィルム。
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