JP2021126873A - 積層シート - Google Patents
積層シート Download PDFInfo
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- JP2021126873A JP2021126873A JP2020024311A JP2020024311A JP2021126873A JP 2021126873 A JP2021126873 A JP 2021126873A JP 2020024311 A JP2020024311 A JP 2020024311A JP 2020024311 A JP2020024311 A JP 2020024311A JP 2021126873 A JP2021126873 A JP 2021126873A
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Images
Classifications
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- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/26—Layered products comprising a layer of synthetic resin characterised by the use of special additives using curing agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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Abstract
【解決手段】積層シート1は、複数の配線4、および、複数の配線4を埋設する磁性層5を備えるシート状のインダクタ2と、インダクタ2の少なくとも厚み方向一方面6に配置される加工安定層3とを備える。磁性層5は、バインダと、略扁平形状を有し、材料が金属類である磁性粒子とを含む。加工安定層3は、熱硬化性樹脂組成物の硬化物を含む。熱硬化性樹脂組成物は、熱硬化性樹脂を必須成分として含む。熱硬化性樹脂組成物は、略球形状を有する第1粒子、および、略扁平形状を有し、材料が無機化合物である第2粒子からなる群から選択される少なくとも1種類の粒子を任意成分として含む。
【選択図】図1
Description
試験(b):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ3を求める。その後、サンプルを、硫酸55g/Lを含有する酸活性水溶液200mLに、25℃で、1分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ4を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(c):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ5を求める。その後、サンプルを、アトテックジャパン社製のリダクションソリューション セキュリガントP 200mLに、45℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ6を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(d):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ7を求める。その後、サンプルを、アトテックジャパン社製のコンセントレート・コンパクトCP 200mLに、80℃で、15分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ8を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(e):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ9を求める。その後、サンプルを、アトテックジャパン社製のスウェリングディップ・セキュリガントP 200mLに、60℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ10を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
この積層シートは、試験(a)〜試験(e)のうち、少なくともいずれか一つの試験を満足するので、薬液を用いるプロセス加工に対する安定性に優れる。
本発明の積層シートの一実施形態を、図1を参照して説明する。
試験(b):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ3を求める。その後、サンプルを、硫酸55g/Lを含有する酸活性水溶液200mLに、25℃で、1分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ4を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(c):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ5を求める。その後、サンプルを、アトテックジャパン社製のリダクションソリューション セキュリガントP 200mLに、45℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ6を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(d):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ7を求める。その後、サンプルを、アトテックジャパン社製のコンセントレート・コンパクトCP 200mLに、80℃で、15分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ8を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(e):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ9を求める。その後、サンプルを、アトテックジャパン社製のスウェリングディップ・セキュリガントP 200mLに、60℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ10を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
試験(a)を満足する場合において、試験(a)におけるサンプルの透磁率の変化率の上限は、好ましくは、4%、より好ましくは、3%である。
そして、この積層シート1は、加工安定層3を備えるので、加工安定性に優れる。
以下の各変形例において、上記した一実施形態と同様の部材および工程については、同一の参照符号を付し、その詳細な説明を省略する。また、各変形例は、特記する以外、一実施形態と同様の作用効果を奏することができる。さらに、一実施形態およびその変形例を適宜組み合わせることができる。
一実施形態に基づいて、図1に示す積層シート1を製造した。
製造途中のインダクタ2、つまり、加工安定層3を備えないインダクタ2を、比較例1の積層シート1とした。
(スリット加工)
実施例1および比較例1のそれぞれの積層シート1の厚み方向一方面に、スリット10を形成した。スリット10を、ダイシングソー11によって形成した。スリット10の幅が30μmであり、深さが100μmであった。
試験a〜試験eにおいて、実施例1および比較例1のそれぞれの透磁率の変化率を求めた。
試験(b):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ3を求めた。その後、サンプルを、硫酸55g/Lを含有する酸活性水溶液200mLに、25℃で、1分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ4を求めた。下記式によって、浸漬前後における透磁率の変化率を求めた。
試験(c):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ5を求めた。その後、サンプルを、アトテックジャパン社製のリダクションソリューション セキュリガントP 200mLに、45℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ6を求めた。下記式によって、浸漬前後における透磁率の変化率を求めた。
試験(d):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ7を求めた。その後、サンプルを、アトテックジャパン社製のコンセントレート・コンパクトCP 200mLに、80℃で、15分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ8を求めた。下記式によって、浸漬前後における透磁率の変化率を求めた。
試験(e):積層シート1を3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ9を求めた。その後、サンプルを、アトテックジャパン社製のスウェリングディップ・セキュリガントP 200mLに、60℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ10を求めた。下記式によって、浸漬前後における透磁率の変化率を求めた。
上記した比透磁率μ1〜μ10は、インピーダンスアナライザ(Agilent社製、「4291B」)によって測定した。
○:浸漬前後における透磁率の変化率が5%以下であった。
×:浸漬前後における透磁率の変化率が5%を越えた。
実施例1の積層シート1の一方面の算術平均粗さRaを測定した。その結果、0.1μmであった。
2 インダクタ
3 加工安定層
4 配線
5 磁性層
6 一方面
Claims (3)
- 複数の配線、および、前記複数の配線を埋設する磁性層を備えるシート状のインダクタと、
前記インダクタの少なくとも厚み方向一方面に配置される加工安定層とを備え、
前記磁性層は、
バインダと、
略扁平形状を有し、材料が金属類である磁性粒子とを含み、
前記加工安定層は、熱硬化性樹脂組成物の硬化物を含み、
前記熱硬化性樹脂組成物は、
熱硬化性樹脂を必須成分として含み、
略球形状を有する第1粒子、および、略扁平形状を有し、材料が無機化合物である第2粒子からなる群から選択される少なくとも1種類の粒子を任意成分として含むことを特徴とする、積層シート。 - 下記試験(a)〜試験(e)のうち、少なくともいずれか一つの試験を満足することを特徴とする、請求項1に記載の積層シート。
試験(a):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ1を求める。その後、サンプルを、硫酸銅5水和物66g/L、硫酸濃度180g/L、塩素50ppm、トップルチナを含有する硫酸銅めっき溶液200mLに、25℃で、120分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ2を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
透磁率の変化率(%)=|μ1−μ2|/μ1×100
試験(b):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ3を求める。その後、サンプルを、硫酸55g/Lを含有する酸活性水溶液200mLに、25℃で、1分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ4を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
透磁率の変化率(%)=|μ3−μ4|/μ3×100
試験(c):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ5を求める。その後、サンプルを、アトテックジャパン社製のリダクションソリューション セキュリガントP 200mLに、45℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ6を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
透磁率の変化率(%)=|μ5−μ6|/μ5×100
試験(d):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ7を求める。その後、サンプルを、アトテックジャパン社製のコンセントレート・コンパクトCP 200mLに、80℃で、15分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ8を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
透磁率の変化率(%)=|μ7−μ8|/μ7×100
試験(e):前記積層シートを3cm角に外形加工してサンプルを作製し、その周波数10MHzにおける比透磁率μ9を求める。その後、サンプルを、アトテックジャパン社製のスウェリングディップ・セキュリガントP 200mLに、60℃で、5分浸漬し、その後、サンプルの周波数10MHzにおける比透磁率μ10を求める。下記式によって、浸漬前後における透磁率の変化率を求める。その結果、サンプルの透磁率の変化率が5%以下である。
透磁率の変化率(%)=|μ9−μ10|/μ9×100 - 厚み方向一方面の算術平均粗さRaが、10μm以下であることを特徴とする、請求項1または2に記載の積層シート。
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