JP7151782B2 - 半導体装置製造用仮保護フィルム、リール体、及び、半導体装置を製造する方法 - Google Patents
半導体装置製造用仮保護フィルム、リール体、及び、半導体装置を製造する方法 Download PDFInfo
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- JP7151782B2 JP7151782B2 JP2020555602A JP2020555602A JP7151782B2 JP 7151782 B2 JP7151782 B2 JP 7151782B2 JP 2020555602 A JP2020555602 A JP 2020555602A JP 2020555602 A JP2020555602 A JP 2020555602A JP 7151782 B2 JP7151782 B2 JP 7151782B2
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Description
図1は、一実施形態に係る仮保護フィルムを示す断面図である。図1に示す仮保護フィルム10は、支持フィルム1と、支持フィルム1の片面上に設けられた接着層2と、から構成される。支持フィルム1の両面上に接着層が形成されていてもよい。この仮保護フィルムは、半導体基板及び半導体基板に搭載された半導体素子を有する半導体装置を製造する方法において、半導体基板の半導体素子が搭載される面とは反対側の面を仮保護するために用いられる。例えば、半導体基板(例えばリードフレーム)に搭載された半導体素子を封止する封止層を形成する工程の間、仮保護フィルムを半導体基板に貼り付けて、半導体基板を仮保護することができる。
一実施形態に係る仮保護フィルムを用いて、例えば、半導体基板の一例としてのリードフレーム及びこれに搭載された半導体素子と、リードフレームの半導体素子側で半導体素子を封止する封止層とを有し、リードフレームの裏面が外部接続用に露出している、半導体装置を製造することができる。このような構成を有する半導体装置は、Non Lead Type Packageといわれることがある。その具体例としては、QFN(QuadFlat Non-leaded Package)、SON(Small Outline Non-leaded Package)が挙げられる。
1-1.塗工用ワニスの作製
表1に示す組成(単位:質量部)を有する樹脂組成物と溶剤としてのシクロヘキサノンとを混合し、混合物を攪拌して、溶剤以外の成分の濃度が12質量%であるワニスA~Eを得た。表に示すアクリルゴム及び剥離性付与剤の詳細は以下のとおりである。
アクリルゴム
・WS-023 EK30(商品名、ナガセケムテックス株式会社製、重量平均分子量:50万、ガラス転移温度(共重合比から計算される理論値):-10℃)
・HTR-280 DR(商品名、ナガセケムテックス株式会社製、重量平均分子量:90万、ガラス転移温度(共重合比から計算される理論値):-29℃)
剥離性付与剤
・EX-614B(商品名、ナガセケムテックス株式会社製、ソルビトールポリグリシジルエーテル、エポキシ当量:174)
・EX-810(商品名、ナガセケムテックス株式会社製、エチレングリコールジグリシジルエーテル、エポキシ当量:113)
支持フィルムとして、芳香族ポリイミドフィルム(宇部興産株式会社製、商品名:UPILEX25SGADS、膜厚:25μm)を準備した。この支持フィルム上に、ワニスA、B、C、D又はEを塗布した。塗膜を90℃で2分間、及び180℃で2分間の加熱によって乾燥し、厚さ2、6、10又は60μmの接着層を形成して、実施例1~9及び比較例1、2の仮保護フィルムを得た。各実施例及び比較例におけるワニスと接着層の厚さとの組み合わせは、表2に示されるとおりである。
2-1.接着層の接着力
(1)常温での貼付け後の接着力
被着体として、CDA194板(Cu-Fe-P系合金、新光電気工業株式会社製)、及びCDA194パラジウムメッキ板(PPF、新光電気工業株式会社製)を準備した。これらリードフレームは、50mm×157mmのサイズを有していた。これらリードフレームに、40mm×160mmのサイズに切り出された各仮保護フィルムを、接着層がリードフレームに接する向きで、ハンドローラーを用いて25℃、荷重20Nの条件で貼り付けた。次いで、フォースゲージを用いて、25℃においてリードフレームの主面に対して90度の方向に50mm/分の速度で各仮保護フィルムを引き剥がした。そのときの接着層の幅10mm当たりの荷重の最大値(N/m)を、常温貼付け後の接着力(90度ピール強度)として記録した。
被着体として、CDA194板(Cu-Fe-P系合金、新光電気工業株式会社製)、及びCDA194パラジウムメッキ板(PPF、新光電気工業株式会社製)を準備した。これらリードフレームは、50mm×157mmのサイズを有していた。これらリードフレームに、40mm×160mmのサイズに切り出された各仮保護フィルムを、接着層がリードフレームに接する向きで、ハンドローラーを用いて25℃、荷重20Nの条件で貼り付けた。得られた貼合体を、空気雰囲気下、オーブン内で、180℃で60分間、次いで200℃で60分間の加熱処理に供した。その後、フォースゲージを用いて、50℃においてリードフレームの主面に対して90度の方向に50mm/分の速度で仮保護フィルムを引き剥がした。そのときの接着層の幅10mm当たりの荷重の最大値(N/m)を、加熱処理後の接着力(90度ピール強度)として記録した。
CDA194フレーム(リードフレーム、新光電気工業株式会社製)に、実施例及び比較例の仮保護フィルムを、接着層がリードフレームに接する向きで、25℃、荷重20Nの条件で貼り付けた。得られた貼合体を、空気雰囲気下、オーブン内で、180℃で60分間、次いで200℃で60分の順で条件を変更しながら加熱した。リードフレームの仮保護フィルムとは反対側の面を、アルゴンガス雰囲気下(流量:20sccm)、150W、15秒の条件でプラズマ処理した。
モールド成形機(アピックヤマダ株式会社製)を用いて、リードフレームの仮保護フィルムとは反対側の面上に封止材(商品名:GE-300、日立化成株式会社製)により封止層を形成した。封止条件は、175℃、6.8MPa、2分間とした。その後、50℃においてリードフレームの面に対して90°の方向に50mm/分の速度で各仮保護フィルムを引き剥がした。仮保護フィルムを引き剥がした後の封止層上に残存した接着層の状態を確認した。封止層の表面の面積に対する、接着層の残留物が占める面積の割合を求めた。接着層の残留物が占める面積の割合に基づいて、封止成形後の剥離性を以下の5段階の基準で評価した。
5:60~100%
4:40~60%未満
3:20%以上40%未満
2:10%以上20%未満
1:0%~10%未満
Claims (9)
- 半導体基板及び該半導体基板に搭載された半導体素子を有する半導体装置を製造する方法において、前記半導体基板の前記半導体素子が搭載される面とは反対側の面を仮保護するための半導体装置製造用仮保護フィルムであって、
当該仮保護フィルムが、支持フィルムと、前記支持フィルムの片面又は両面上に設けられた接着層と、を備え、
前記接着層がアクリルゴムを含有し、
前記アクリルゴムの含有量が、前記接着層の質量を基準として50質量%以上であり、
前記接着層が、剥離性付与剤を更に含有し、
前記接着層の厚さが8μm以上100μm以下であり、
前記支持フィルムの厚さが10μm以上200μm以下であり、
前記仮保護フィルムを、銅合金の表面を有する銅合金板に、前記接着層が前記銅合金板に接するように25℃で貼り付け、それにより得られた貼合体を180℃で60分間及び200℃で60分間の順で加熱したときに、前記仮保護フィルムの前記銅合金板に対する90度ピール強度が、前記貼合体が加熱される前に25℃において5N/m以上で、前記貼合体が加熱された後に50℃において150N/m以下である、半導体装置製造用仮保護フィルム。 - 前記アクリルゴムが、(メタ)アクリル酸アルキルエステル単位と、(メタ)アクリル酸単位及び/又はアクリル酸2-ヒドロキシエチル単位と、アクリロニトリル単位とを含む共重合体であり、これら単量体単位の合計の割合が、前記アクリルゴム全体の質量に対して90質量%以上である、請求項1に記載の半導体装置製造用仮保護フィルム。
- 前記アクリルゴムのガラス転移温度が-50~20℃である。請求項1又は2に記載の半導体装置製造用仮保護フィルム。
- 前記アクリルゴムの重量平均分子量が150000~900000である、請求項1~3のいずれか一項に記載の半導体装置製造用仮保護フィルム。
- 前記剥離性付与剤の含有量が、前記アクリルゴム100質量部に対して0.1質量部以上50質量部未満である、請求項1~4のいずれか一項に記載の半導体装置製造用仮保護フィルム。
- 前記剥離性付与剤が、脂肪族基及び該脂肪族基に結合したグリシジルエーテル基を有する脂肪族エポキシ化合物を含む、請求項1~5のいずれか一項に記載の半導体装置製造用仮保護フィルム。
- 前記接着層の前記支持フィルムとは反対側の面を覆うカバーフィルムを更に備える、請求項1~6のいずれか一項に記載の半導体装置製造用仮保護フィルム。
- 筒状の巻取部を有するリールと、前記巻取部に巻き取られた請求項1~7のいずれか一項に記載の半導体装置製造用仮保護フィルムと、を備える、リール体。
- 半導体基板の片面に、請求項1~7のいずれか一項に記載の半導体装置製造用仮保護フィルムを、その接着層が前記半導体基板に接する向きで貼り付ける工程と、
前記半導体基板の前記仮保護フィルムとは反対側の面上に半導体素子を搭載する工程と、
前記半導体素子を封止する封止層を形成して、前記半導体基板、前記半導体素子及び前記封止層を有する封止成形体を得る工程と、
前記封止成形体から前記仮保護フィルムを剥離する工程と、
をこの順に備える、半導体装置を製造する方法。
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JP2024068722A (ja) * | 2022-11-09 | 2024-05-21 | 日東電工株式会社 | 保護シート、及び、電子部品装置の製造方法 |
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JP2003086614A (ja) | 2001-09-12 | 2003-03-20 | Hitachi Chem Co Ltd | 半導体装置の製造方法、半導体用接着・剥離フィルム、これを用いたリードフレーム及び半導体装置 |
JP2004217838A (ja) | 2003-01-17 | 2004-08-05 | Saiden Chemical Industry Co Ltd | 再剥離型粘着剤組成物 |
JP2006312703A (ja) | 2005-04-08 | 2006-11-16 | Toray Ind Inc | 電子材料用接着剤シート |
WO2009044732A1 (ja) | 2007-10-05 | 2009-04-09 | Hitachi Chemical Company, Ltd. | 接着剤組成物及びこれを用いた回路接続材料、並びに、回路部材の接続方法及び回路接続体 |
JP2011190419A (ja) | 2010-03-17 | 2011-09-29 | Toyo Ink Sc Holdings Co Ltd | 水系再剥離型粘着剤および粘着テープ |
WO2018181536A1 (ja) | 2017-03-29 | 2018-10-04 | 日立化成株式会社 | 接着剤組成物及び構造体 |
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US6700185B1 (en) | 1999-11-10 | 2004-03-02 | Hitachi Chemical Co., Ltd. | Adhesive film for semiconductor, lead frame and semiconductor device using the same, and method for manufacturing semiconductor device |
CN101490194A (zh) * | 2006-07-18 | 2009-07-22 | 日本合成化学工业株式会社 | 树脂组合物、临时表面保护用粘合剂、粘合片、及粘合片的制造方法 |
JP5551568B2 (ja) * | 2009-11-12 | 2014-07-16 | 日東電工株式会社 | 樹脂封止用粘着テープ及びこれを用いた樹脂封止型半導体装置の製造方法 |
JP5137937B2 (ja) * | 2009-12-16 | 2013-02-06 | 日東電工株式会社 | 半導体装置製造用耐熱性粘着シート、該シートに用いる粘着剤、及び該シートを用いた半導体装置の製造方法 |
JP5144634B2 (ja) * | 2009-12-22 | 2013-02-13 | 日東電工株式会社 | 基板レス半導体パッケージ製造用耐熱性粘着シート、及びその粘着シートを用いる基板レス半導体パッケージ製造方法 |
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- 2019-11-07 KR KR1020217016518A patent/KR20210089191A/ko not_active Application Discontinuation
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- 2019-11-07 US US17/288,913 patent/US20210395577A1/en active Pending
- 2019-11-07 SG SG11202103537PA patent/SG11202103537PA/en unknown
- 2019-11-07 CN CN201980070533.8A patent/CN112930261A/zh active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2003086614A (ja) | 2001-09-12 | 2003-03-20 | Hitachi Chem Co Ltd | 半導体装置の製造方法、半導体用接着・剥離フィルム、これを用いたリードフレーム及び半導体装置 |
JP2004217838A (ja) | 2003-01-17 | 2004-08-05 | Saiden Chemical Industry Co Ltd | 再剥離型粘着剤組成物 |
JP2006312703A (ja) | 2005-04-08 | 2006-11-16 | Toray Ind Inc | 電子材料用接着剤シート |
WO2009044732A1 (ja) | 2007-10-05 | 2009-04-09 | Hitachi Chemical Company, Ltd. | 接着剤組成物及びこれを用いた回路接続材料、並びに、回路部材の接続方法及び回路接続体 |
JP2011190419A (ja) | 2010-03-17 | 2011-09-29 | Toyo Ink Sc Holdings Co Ltd | 水系再剥離型粘着剤および粘着テープ |
WO2018181536A1 (ja) | 2017-03-29 | 2018-10-04 | 日立化成株式会社 | 接着剤組成物及び構造体 |
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TWI820249B (zh) | 2023-11-01 |
WO2020096011A1 (ja) | 2020-05-14 |
TW202025315A (zh) | 2020-07-01 |
CN112930261A (zh) | 2021-06-08 |
KR20210089191A (ko) | 2021-07-15 |
JPWO2020096011A1 (ja) | 2021-10-07 |
US20210395577A1 (en) | 2021-12-23 |
SG11202103537PA (en) | 2021-05-28 |
PH12021551006A1 (en) | 2021-10-04 |
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