JPWO2019131923A1 - 接着剤フィルム - Google Patents
接着剤フィルム Download PDFInfo
- Publication number
- JPWO2019131923A1 JPWO2019131923A1 JP2019562190A JP2019562190A JPWO2019131923A1 JP WO2019131923 A1 JPWO2019131923 A1 JP WO2019131923A1 JP 2019562190 A JP2019562190 A JP 2019562190A JP 2019562190 A JP2019562190 A JP 2019562190A JP WO2019131923 A1 JPWO2019131923 A1 JP WO2019131923A1
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- foil
- conductive particles
- adhesive film
- conductive
- 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
Links
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Classifications
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Abstract
Description
フェノキシ樹脂(ユニオンカーバイド株式会社製、製品名:PKHC、重量平均分子量:45000)50gを、トルエン(沸点:110.6℃)と酢酸エチル(沸点:77.1℃)との混合溶剤(質量比でトルエン:酢酸エチル=1:1)に溶解して、固形分40質量%のフェノキシ樹脂溶液を得た。このフェノキシ樹脂溶液に、ラジカル重合性材料として、ウレタンアクリレート(根上工業株式会社製、製品名:UN7700)及びリン酸エステルジメタクリレート(共栄社化学株式会社製、製品名:ライトエステルP−2M)と、硬化剤として1,1−ビス(t−ヘキシルパーオキシ)−3,3,5−トリメチルシクロヘキサン(日油株式会社製、製品名:パーヘキサTMH)とを、フェノキシ樹脂:ウレタンアクリレート:リン酸エステルジメタクリレート:硬化剤=10:10:3:2の固形質量比で配合し溶液A1を得た。
まず、ジビニルベンゼン、スチレンモノマー及びブチルメタクリレートの混合溶液に、重合開始剤としてベンゾイルパーオキサイドを投入して、高速で均一撹拌しながら加熱して重合反応を行うことで微粒子分散液を得た。この微粒子分散液をろ過し減圧乾燥することで、微粒子の凝集体であるブロック体を得た。さらに、このブロック体を粉砕することで、それぞれ架橋密度の異なる平均粒子径20μmの核体(樹脂粒子)を作製した。
<接着剤フィルムの作製>
100体積部の溶液A1に対して、45体積部の導電粒子B1と15体積部の導電粒子C1を分散させて、混合溶液を得た。得られた混合溶液を、厚さ80μmのフッ素樹脂フィルム上に塗布し、70℃で10分間熱風乾燥することにより溶剤を除去して、フッ素樹脂フィルム上に形成された厚さ20μmのフィルム状の接着剤組成物(第1の接着剤層及び第2の接着剤層)を得た。
図3(a),(b)に示すように、得られた接着剤フィルムを6mm×6mmに切り出した接着剤フィルム31を、6mm×50mmの銅箔32の略中央に配置し、株式会社大橋製作所製BD−07を用いて加熱加圧(50℃、0.1MPa、2秒間)を行って貼り付けた。続いて、図3(c),(d)に示すように、50mm×6mmのアルミ箔33を用意した。銅箔32と接着剤フィルム31との積層体に対して接着剤フィルム31を覆うようにアルミ箔33を重ねて、株式会社大橋製作所製BD−07で加熱加圧(150℃、0.1MPa、10秒間)を行って、低圧接続時の導電性の評価用の実装体を得た。得られた実装体に対して、図4に示すように電流計及び電圧計を接続し、4端子法で接続抵抗(初期)を測定した。結果を表1に示す。
まず、上記の<低圧接続時の導電性の評価>と同様の手順で実装体を作製する場合に、得られる実装体について<低圧接続時の導電性の評価>と同様に測定した接続抵抗(初期)が0.20Ωとなるのに必要な圧力(銅箔32と接着剤フィルム31との積層体に対して接着剤フィルム31を重ねて加熱加圧する際の圧力)P(MPa)を算出した。
次いで、接着剤成分の流出量を、以下に示す手順で評価した。すなわち、上記で得られた接着剤フィルムをフッ素樹脂フィルムごと3mm×3mmの正方形に切り取ってフッ素樹脂フィルム付き接着剤フィルムを得た。フッ素樹脂フィルム付き接着剤フィルムの接着剤フィルム面を松浪硝子製角カバーグラス(品番C018181)と接するようにカバーグラス上の略中央に置き、株式会社大橋製作所製BD−07で加熱加圧(60℃、0.1MPa、2秒間)後、フッ素樹脂フィルムを剥がした。続いて、接着剤フィルムの上に更にもう一枚同じカバーグラスを置き、株式会社大橋製作所製BD−07で加熱加圧(130℃、上記で算出した圧力P(MPa)、10秒間)した。スキャナー及びPhotoshop(登録商標)を使用して剥がしたフッ素樹脂フィルムの面積[A]と、加熱加圧後の接着剤フィルムの面積[B]とをピクセル数として測定し、下記式に従って流出量を算出した。結果を表1に示す。
流出量(%)=([B]/[A])×100
図3(a),(b)に示すように、得られた接着剤フィルムを6mm×6mmに切り出した接着剤フィルム31を、6mm×50mmの銅箔32の略中央に配置し、株式会社大橋製作所製BD−07を用いて加熱加圧(50℃、0.5MPa、2秒間)を行って貼り付けた。続いて、図3(c),(d)に示すように、50mm×6mmのアルミ箔33を用意した。銅箔32と接着剤フィルム31との積層体に対して接着剤フィルム31を覆うようにアルミ箔33重ねて、株式会社大橋製作所製BD−07で加熱加圧(150℃、0.5MPa、10秒間)を行って、信頼性の評価用の実装体を得た。
得られた実装体に対して、図4に示すように電流計及び電圧計を接続し、4端子法で接続抵抗(初期)を測定した。また、エスペック株式会社製TSA−43ELを使用して、−20℃で30分間保持、10分間かけて100℃まで昇温、100℃で30分間保持、10分間かけて−20℃まで降温、というヒートサイクルを500回繰り返すヒートサイクル試験を実装体に対して行った後に、上記と同様にして接続抵抗(ヒートサイクル試験後)を測定した。結果を表1に示す。
第1の接着剤層及び第2の接着剤層の厚さをそれぞれ25μmに変更した以外は、実施例1と同様にして接着剤フィルムの作製及び評価を行った。
金属層の厚さを30μmに変更した以外は、実施例1と同様にして接着剤フィルムの作製及び評価を行った。
第1の接着剤層及び第2の接着剤層において、導電粒子B1(第1の導電粒子)を用いなかった以外は、実施例1と同様にして接着剤フィルムの作製及び評価を行った。
第1の接着剤層及び第2の接着剤層において、導電粒子C1(第2の導電粒子)を用いなかった以外は、実施例1と同様にして接着剤フィルムの作製及び評価を行った。
金属層を設けずに、上述の接着剤層(厚さ65μm)のみからなる接着剤フィルムを作製した以外は、実施例1と同様にして接着剤フィルムの作製及び評価を行った。
Claims (5)
- 第1の接着剤層と、金属層と、第2の接着剤層と、をこの順で備え、
前記第1の接着剤層及び前記第2の接着剤層のそれぞれが、
デンドライト状の導電粒子である第1の導電粒子と、
前記第1の導電粒子以外の導電粒子であって、非導電性の核体及び該核体上に設けられた導電層を有する導電粒子である第2の導電粒子と、を含有する、接着剤フィルム。 - 前記導電層が、金、ニッケル及びパラジウムからなる群より選ばれる少なくとも1種を含有する、請求項1に記載の接着剤フィルム。
- 前記金属層の厚さが25μm以上である、請求項1又は2に記載の接着剤フィルム。
- 前記第1の接着剤層の厚さが30μm以下である、請求項1〜3のいずれか一項に記載の接着剤フィルム。
- 前記第2の接着剤層の厚さが30μm以下である、請求項1〜4のいずれか一項に記載の接着剤フィルム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2017254725 | 2017-12-28 | ||
JP2017254725 | 2017-12-28 | ||
PCT/JP2018/048285 WO2019131923A1 (ja) | 2017-12-28 | 2018-12-27 | 接着剤フィルム |
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TW201936844A (zh) | 2019-09-16 |
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WO2019131923A1 (ja) | 2019-07-04 |
CN111527164B (zh) | 2022-11-18 |
KR102579269B1 (ko) | 2023-09-14 |
KR20200101955A (ko) | 2020-08-28 |
CN111527164A (zh) | 2020-08-11 |
US20210017427A1 (en) | 2021-01-21 |
JP7283395B2 (ja) | 2023-05-30 |
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