JP7203482B2 - 電子部品装置の製造方法 - Google Patents
電子部品装置の製造方法 Download PDFInfo
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- JP7203482B2 JP7203482B2 JP2016165910A JP2016165910A JP7203482B2 JP 7203482 B2 JP7203482 B2 JP 7203482B2 JP 2016165910 A JP2016165910 A JP 2016165910A JP 2016165910 A JP2016165910 A JP 2016165910A JP 7203482 B2 JP7203482 B2 JP 7203482B2
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Description
<1> 電子部品と基板とが複数のバンプを介して接触した状態で、片面又は両面に離型層を有する緩衝シートを介して加熱用部材により前記電子部品を加熱することによって、前記電子部品と前記基板とを前記バンプを介して接合する加熱工程を有する、電子部品装置の製造方法。
本明細書において「~」を用いて示された数値範囲には、「~」の前後に記載される数値がそれぞれ最小値及び最大値として含まれる。
本明細書中に段階的に記載されている数値範囲において、一つの数値範囲で記載された上限値又は下限値は、他の段階的な記載の数値範囲の上限値又は下限値に置き換えてもよい。また、本明細書中に記載されている数値範囲において、その数値範囲の上限値又は下限値は、実施例に示されている値に置き換えてもよい。
本明細書において「層」との語には、当該層が存在する領域を観察したときに、当該領域の全体に形成されている場合に加え、当該領域の一部にのみ形成されている場合も含まれる。
本明細書において「平均厚み」及び「平均距離」とは、任意に選択した3点での測定値の算術平均値を意味する。
本実施形態の電子部品装置の製造方法は、電子部品と基板とが複数のバンプを介して接触した状態で、片面又は両面に離型層を有する緩衝シートを介して加熱用部材により電子部品を加熱することによって、電子部品と基板とをバンプを介して接合する加熱工程を有する。
なお、本明細書において「接合」とは、電子部品と基板とがバンプを介して電気的に接続することを意味する。
このような従来の製造方法では、複数の電子部品装置を一括して製造する場合、加熱用部材との接触状態が電子部品間でばらつき、実装時の荷重が不均一になる結果、電子部品装置の接続不良が多く発生し、歩留まりが低下することがあり、また、過荷重の生じた箇所では電子部品が破損する懸念がある。また、荷重の不均一さが電子部品装置の接続不良を発生させるほどではない場合であっても、不充分な接続形状は電子部品装置の信頼性低下の一因となる。
本実施形態の製造方法では、加熱時に電子部品と加熱用部材との間に緩衝シートを介在させている。電子部品と加熱用部材との間に緩衝シートが介在することにより、電子部品と加熱用部材との接触状態のばらつきが低減し、荷重の不均一さが緩和される結果、歩留まりが向上すると考えられる。また、緩衝シートは片面又は両面に離型層を有するため、電子部品及び加熱用部材の少なくとも一方と緩衝シートとの接着が抑えられ、作業効率が向上し得る。
付与工程では、電子部品における基板と対向する面及び基板における電子部品と対向する面からなる群より選択される少なくとも一方に、アンダーフィル材を付与する。付与工程の具体的な方法は特に制限されず、基板のみにアンダーフィル材を付与しても、電子部品のみにアンダーフィル材を付与しても、両方にアンダーフィル材を付与してもよい。生産性の観点から、電子部品のみにアンダーフィル材を付与する方法が好ましい。
また、基板の他の例としては、シリコンウェハを挙げることができる。シリコンウェハは、表面に接続用の電極を含む導体配線が形成されたものであってもよい。また、シリコンウェハは、貫通電極(シリコン貫通電極;TSV(Through Silicon Via))が形成されたものであってもよい。
電子部品は、複数のダイを厚み方向に配置する構成であってもよく、加熱工程において複数のダイが貫通電極(TSV)によって接続される構成であってもよい。このとき、ダイの片面又は両面にアンダーフィル材を付与してもよい。
なお、隣接する接続部間のピッチは、より狭くなる(狭ピッチ化する)傾向にあるため、接続信頼性の観点から、アンダーフィル材としては導電性粒子を含有しないものが好ましい。
アンダーフィル材が液状の場合、付与方法としては、例えば、スクリーン印刷法、及びエアーディスペンサー、ジェットディスペンサー、オーガータイプディスペンサー等のディスペンサーを用いる方法が挙げられる。
アンダーフィル材がフィルム状の場合、付与方法としては、ダイアフラム方式のラミネータ、ロール方式のラミネータ等を用いる方法が挙げられる。
液状のアンダーフィル材を基板の上に付与する場合は、例えば、電子部品の搭載位置の全体に付与する方法、電子部品の搭載位置に対応する四角形の対角線に沿った2本の線からなるクロス形状に付与する方法、クロス形状に更にクロス形状を45°ずらして重ねた米字形状に付与する方法、及び電子部品の搭載位置の中心に一点で付与する方法が挙げられる。信頼性の観点からアンダーフィル材のクリーピング等を抑制するためには、クロス形状又は米字形状で付与することが好ましい。基板に基板電極が設けられている場合は、基板電極が設けられた箇所を含む電子部品の搭載位置にアンダーフィル材を付与することが好ましい。
フィルム状のアンダーフィル材を電子部品又は基板の上に付与する場合は、電子部品における基板と対向する面の全体、又は電子部品の搭載位置の全体に付与することが望ましい。
加圧工程では、電子部品と基板とが複数のバンプを介して対向した状態で加圧して、電子部品と基板との間隙にアンダーフィル材を充填し、且つ、電子部品と基板とをバンプを介して接触させる。
アンダーフィル材の充填温度の下限は特に制限されない。樹脂の低粘度化の観点からは、アンダーフィル材の充填温度は、例えば、30℃以上であることが好ましく、50℃以上であることがより好ましく、80℃以上であることが更に好ましい。
加熱工程では、電子部品と基板とが複数のバンプを介して接触した状態で、片面又は両面に離型層を有する緩衝シートを介して加熱用部材により電子部品を加熱することによって、電子部品と基板とをバンプを介して接合する。この加熱工程において、アンダーフィル材が硬化する。緩衝シートが熱硬化性シートである場合には、この加熱工程において、緩衝シートも硬化する。
以上の工程を経ることで、電子部品装置が製造される。
本実施形態の電子部品装置は、基板と、アンダーフィル材の硬化物と、電子部品とがこの順に配置され、基板と電子部品とが複数のバンプを介して接合され、且つ、アンダーフィル材の硬化物が基板と電子部品との間隙を充填している。本実施形態の電子部品装置は、前述した本実施形態の製造方法により製造される。本実施形態の電子部品装置は、電子部品と基板との接続性が良好であり、信頼性に優れる。
本実施形態の製造方法で用いられる緩衝シートは、特に制限されず、金属箔、熱可塑性シート、熱硬化性シート等の箔又はシートに離型層を形成したものが挙げられる。電子部品の形状への追従性の観点から、熱可塑性シート及び熱硬化性シートを用いることが好ましく、熱硬化性シートを用いることがより好ましい。熱硬化性シートは、加熱工程において、電子部品の形状に追従して変形した後に硬化し得るため、複数の電子部品装置を一括して製造する場合であっても、荷重の不均一さがより低減され、歩留まりがより向上する傾向にある。
なお、本明細書において「(メタ)アクリレート」とは、アクリレート又はメタクリレートを意味する。
シリコーン系離型剤の市販品としては、例えば、信越化学工業(株)製の「KF-965」が挙げられる。
熱硬化タイプの離型剤としては、例えば、アルキド樹脂とメラミン樹脂とを含有する離型剤が挙げられる。市販品としては、例えば、日立化成(株)製の「テスファイン303」、「テスファイン319」、及び「TA31-209E」が挙げられる。
<緩衝シートの作製>
ポリイミドフィルム(東レ・デュポン(株)製、商品名「カプトン150H」、平均厚み:50μm)の片面に、フッ素系離型剤(AGCセイミケミカル(株)製、商品名「MR F-6758-AL」)を塗布して離型層を形成し、緩衝シートAを得た。
電子部品装置の材料として、アルミニウム配線を有する7.3mm×7.3mm×0.1mmのシリコンチップ((株)ウォルツ製、商品名「WALTS-TEG CC80-0101JY-MODEL 1」、バンプ:Sn-Ag-Cu系、バンプ間隔:80μm)を電子部品として、及び回路が形成された18mm×18mm×0.4mmの基板((株)ウォルツ製、商品名「WALTS-KIT CC80-0102JY-MODEL 1」、ソルダーレジスト:PSR4000-AUS703、基材:E679FGS)を基板として、それぞれ用意した。
次いで、充填温度が80℃となるように温度を調節したシリコンチップのバンプを有する面を基板側に向け、バンプが基板と接触するように、シリコンチップの上から120Nの荷重で加圧用部材により加圧した(加圧工程)。この際、シリコンチップ上に付与されたアンダーフィル材が加圧により流動して基板とシリコンチップとの間隙を充填した。このようにして、電子部品実装基板を製造した。
<緩衝シートの作製>
ポリイミドフィルム(東レ・デュポン(株)製、商品名「カプトン150H」、平均厚み:50μm)の片面に、熱硬化タイプの離型剤(日立化成(株)製、商品名「テスファイン303」)を塗布して離型層を形成し、緩衝シートBを得た。
緩衝シートAの代わりに緩衝シートBを用いた以外は実施例1と同様にして、電子部品装置5個を一括して製造した。
<緩衝シートの作製>
エポキシ樹脂(DIC(株)製、商品名「N-770」)41.5gとフェノール樹脂(DIC(株)製、商品名「TD-2131」)17.7gとをメチルエチルケトン40.0gに溶解した。その後、硬化促進剤(四国化成(株)製、商品名「2PZ」)0.8gを加え、ワニスを得た。
緩衝シートAの代わりに緩衝シートCを用いた以外は実施例1と同様にして、電子部品装置5個を一括して製造した。
フッ素系離型剤の代わりに熱硬化タイプの離型剤(日立化成(株)製、商品名「テスファイン303」)を用いた以外は実施例3と同様にして、緩衝シートDを得た。そして、緩衝シートAの代わりに緩衝シートDを用いた以外は実施例1と同様にして、電子部品装置5個を一括して製造した。
フッ素系離型剤を用いない以外は実施例3と同様にして、緩衝シートEを得た。そして、緩衝シートAの代わりに緩衝シートEを用いた以外は実施例1と同様にして、電子部品装置5個を一括して製造した。
緩衝シートAを用いない以外は実施例1と同様にして、電子部品装置5個を一括して製造した。
<接続性の評価>
上記で得られた電子部品装置について、テスター(カイセ(株)製、商品名「SK-6500」)を用いて導通を確認することにより、シリコンチップと基板との接続性を評価した。製造した5個の電子部品装置のうち、導通が取れている電子部品装置の割合を表1に示す。
上記で得られた全て電子部品装置について緩衝シートが離型できたものを「A」、一部の電子部品装置について緩衝シートが離型できなかったものを「B」として、離型性を評価した。結果を表1に示す。なお、比較例1は緩衝シートを用いていないため、表1では「-」と示している。
2 はんだバンプ
3 アンダーフィル材
4 接続パッド
5 基板
6 加圧用部材
7 緩衝シート
8 加熱用部材
Claims (7)
- 電子部品と基板とが複数のバンプを介して接触した状態で、片面又は両面に離型層を有する緩衝シートを介して加熱用部材により前記電子部品を加熱することによって、前記電子部品と前記基板とを前記バンプを介して接合する加熱工程を有し、前記緩衝シートが熱硬化能を有する熱硬化性シートを含む、電子部品装置の製造方法。
- 前記電子部品における前記基板と対向する面及び前記基板における前記電子部品と対向する面からなる群より選択される少なくとも一方に、アンダーフィル材を付与する付与工程を更に有する、請求項1に記載の電子部品装置の製造方法。
- 前記緩衝シートは、前記離型層が前記電子部品と接するように配置される、請求項1又は請求項2に記載の電子部品装置の製造方法。
- 前記加熱工程において、それぞれ複数の前記電子部品と前記基板とを一括して加熱する、請求項1~請求項3のいずれか1項に記載の電子部品装置の製造方法。
- 前記加熱工程において、前記基板の温度が25℃~200℃であり、前記電子部品の温度が230℃~300℃である、請求項1~請求項4のいずれか1項に記載の電子部品装置の製造方法。
- 電子部品装置における前記電子部品と前記基板との平均距離が50μm以下であり、前記バンプ間の平均距離が200μm以下である、請求項1~請求項5のいずれか1項に記載の電子部品装置の製造方法。
- 前記緩衝シートが熱硬化性シートを含み、前記熱硬化性シートは片面又は両面に支持体を有する、請求項1~請求項6のいずれか1項に記載の電子部品装置の製造方法。
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JP2019041097A (ja) * | 2017-08-28 | 2019-03-14 | 日立化成株式会社 | 電子部品装置を製造する方法、熱プレス用シート及び熱プレス用熱硬化性樹脂組成物 |
JP2019125769A (ja) * | 2018-01-11 | 2019-07-25 | 日立化成株式会社 | 半導体装置の製造方法 |
JP2019153767A (ja) * | 2018-02-28 | 2019-09-12 | 日立化成株式会社 | 半導体装置及びその製造方法 |
JP7180152B2 (ja) * | 2018-07-11 | 2022-11-30 | 昭和電工マテリアルズ株式会社 | 電子部品装置を製造する方法、熱プレス用シート及び熱プレス用熱硬化性樹脂組成物 |
CN111276419B (zh) * | 2018-12-04 | 2023-02-24 | 昆山微电子技术研究院 | 一种固相键合装置 |
JP7211822B2 (ja) * | 2019-01-09 | 2023-01-24 | 株式会社東京精密 | 電子部品のポッティング方法及びそれを用いた電子装置 |
WO2021152934A1 (ja) | 2020-01-29 | 2021-08-05 | 株式会社村田製作所 | 電極付き受動部品及び電極付き受動部品の集合体 |
KR20220136391A (ko) * | 2020-03-04 | 2022-10-07 | 티디케이가부시기가이샤 | 소자 어레이의 가압 장치, 제조 장치 및 제조 방법 |
JP7565766B2 (ja) | 2020-11-26 | 2024-10-11 | 株式会社Fuji | 部品装着方法および部品装着装置 |
WO2023062671A1 (ja) * | 2021-10-11 | 2023-04-20 | 株式会社レゾナック | 電子部品装置の製造方法、電子部品の実装方法及び緩衝シート |
WO2023238253A1 (ja) * | 2022-06-07 | 2023-12-14 | 株式会社レゾナック | 緩衝シート、電子部品の実装方法及び電子部品装置の製造方法 |
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