JP6431343B2 - 接着シート、ダイシングシート付き接着シート、積層シート及び半導体装置の製造方法 - Google Patents
接着シート、ダイシングシート付き接着シート、積層シート及び半導体装置の製造方法 Download PDFInfo
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- JP6431343B2 JP6431343B2 JP2014236371A JP2014236371A JP6431343B2 JP 6431343 B2 JP6431343 B2 JP 6431343B2 JP 2014236371 A JP2014236371 A JP 2014236371A JP 2014236371 A JP2014236371 A JP 2014236371A JP 6431343 B2 JP6431343 B2 JP 6431343B2
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- AYEKOFBPNLCAJY-UHFFFAOYSA-O thiamine pyrophosphate Chemical compound CC1=C(CCOP(O)(=O)OP(O)(O)=O)SC=[N+]1CC1=CN=C(C)N=C1N AYEKOFBPNLCAJY-UHFFFAOYSA-O 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl 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])C([H])([H])C([H])([H])[H] 0.000 description 1
- QLAGHGSFXJZWKY-UHFFFAOYSA-N triphenylborane;triphenylphosphane Chemical compound C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 QLAGHGSFXJZWKY-UHFFFAOYSA-N 0.000 description 1
- IUURMAINMLIZMX-UHFFFAOYSA-N tris(2-nonylphenyl)phosphane Chemical compound CCCCCCCCCC1=CC=CC=C1P(C=1C(=CC=CC=1)CCCCCCCCC)C1=CC=CC=C1CCCCCCCCC IUURMAINMLIZMX-UHFFFAOYSA-N 0.000 description 1
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 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
- 239000002966 varnish Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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Description
(接着シート3)
図1に示すように、接着シート3の形態はシート状である。接着シート3は熱硬化性を備える。
なお、酸価は、JIS K 0070−1992に規定される中和滴定法で測定できる。
なお、エポキシ樹脂のエポキシ当量は、JIS K 7236−2009に規定された方法で測定できる。
BET比表面積は、JIS K6430:2008に準拠して測定する。
ダイシングシート付き接着シート10について説明する。
図4〜図5に示すように、積層シート2は、カバーフィルム9と、カバーフィルム9上に配置されたダイシングシート付き接着シート10a、10b、10c、‥‥‥10mとを備える。ダイシングシート付き接着シート10a、ダイシングシート付き接着シート10bの間隔、ダイシングシート付き接着シート10b、ダイシングシート付き接着シート10cの間隔、‥‥‥ダイシングシート付き接着シート10l、ダイシングシート付き接着シート10mの間隔は一定である。
図6に示すように、ダイシングシート付き接着シート10に半導体ウエハ4を圧着する。半導体ウエハ4としては、シリコンウエハ、シリコンカーバイドウエハ、化合物半導体ウエハなどが挙げられる。化合物半導体ウエハとしては、窒化ガリウムウエハなどが挙げられる。
アクリルゴム:ナガセケムテックス社製のテイサンレジンSG−708−6(カルボキシル基及びヒドロキシル基を含むアクリル酸エステル共重合体、Mw:70万、酸価:9mgKOH/g、ガラス転移温度:4℃)
エポキシ樹脂:日本化薬社製のEPPN−501HY(エポキシ当量169g/eq.のエポキシ樹脂)
フェノール樹脂:明和化成社製のMEH−7851S(水酸基当量209g/eq.のフェノール樹脂)
シリカフィラー1:アドマテックス社製のYA010C−SV1(ビニルシランにより表面処理された、BET比表面積300m2/g、新モース硬度7のシリカ)
シリカフィラー2:アドマテックス社製のYA050C−SV2(ビニルシランにより表面処理された、BET比表面積60m2/g、新モース硬度7のシリカ)
シリカフィラー3:アドマテックス社製のYA010C(BET比表面積300m2/g、新モース硬度7のシリカ)
シリカフィラー4:アドマテックス社製のSO−25R(BET比表面積6m2/g、新モース硬度7のシリカ)
表1に記載の配合比に従い、表1に記載の各成分及び溶媒(メチルエチルケトン)を、ハイブリッドミキサー(キーエンス製 HM−500)の攪拌釜に入れ、攪拌モード、3分で攪拌・混合した。得られたワニスを、離型処理フィルム(三菱樹脂(株)製のMRA50)にダイコーターにて塗布した後、乾燥させて、厚み10μmの接着シートを得た。接着シートから直径230mmの円形状の接着シートを切り出し、円形状の接着シートを基材及び基材上に配置された粘着剤層からなるダイシングシート(日東電工(株)製のP2130G)に25℃で貼り付けて、ダイシングシート付き接着シートを作製した。
接着シート、ダイシングシート付き接着シートを用いて以下の評価を行った。結果を表1に示す。
接着シートを60℃で貼り合せて厚み200μmの積層物を得た。積層物を10mm×30mm×200μmのサイズに加工することにより加工品を得た。加工品の粘弾性を動的粘弾性系測定装置(TAインスツルメンツ社製のRSA III)を用いて測定した。測定条件は、温度範囲−10℃〜285℃、昇温速度10℃/min、チャック間距離22.5mm、1Hzで行った。得られた貯蔵弾性率データから、130℃の貯蔵弾性率、tanδ、tanδの最大値を読み取った。
接着シートから10mgの試験片を切り出した。試験片をアルミパンで挟むことにより、測定用サンプルを用意した。アルミパンのみからなるリファレンス用サンプルも用意した。示唆走査熱量測定装置(セイコーインスツルメンツ社製のDSC6220)を用いて、昇温速度10℃/min、温度範囲25℃〜300℃で測定を行った。得られた発熱反応ピークの熱量をサンプルの重量で割ることにより反応熱量を算出した。
片面をアルミ蒸着したウェハを研削することにより、厚み40μmのダイシング用ウェハを得た。ダイシング用ウェハをダイシングシート付き接着シートに貼りつけ、次いで10mm角にダイシングすることにより、接着シート付きのチップを得た。接着シート付きのチップをCuリードフレーム上に120℃、0.1MPa、1secの条件でダイアタッチした。ワイヤーボンディング装置(K&S社製のMaxum Plus)を用いて、ひとつのチップに線径18μmのAuワイヤーを5本ボンディングした。出力80Amp、時間10ms及び荷重50gの条件でAuワイヤーをCuリードフレームに打った。出力125Amp、時間10ms及び荷重80gの条件でAuワイヤーをチップに打った。5本のAuワイヤーのうち1本以上をチップに接合できなかった場合を×と判定し、5本のAuワイヤーのうち5本をチップに接合できた場合を○と判定した。
接着シートを9.5mm角のミラーチップに60℃で貼り付け、チップ付きシートを形成した。チップ付きシートを温度120℃、圧力0.1MPa、時間1秒の条件でBGA基板にボンディングすることによりチップ実装基板を得た。乾燥機を用いてチップ実装基板を150℃、1時間の条件で加熱した。次いで、モールドマシン(TOWAプレス社製、マニュアルプレスY−1)を用いて、成形温度175℃、クランプ圧力184kN、トランスファー圧力5kN、時間120秒の条件下でチップを封止樹脂で封止した。接着シートとミラーチップとの間のボイドを、超音波映像装置(日立ファインテック社製、FS200II)を用いて観察した。観察画像においてボイドが占める面積を、二値化ソフト(WinRoof ver.5.6)を用いて算出した。ボイドの占める面積が接着シートの表面積に対して10%未満であった場合を「○」と判定し、10%以上の場合を「×」と判定した。
1 ダイシングシート
11 基材
12 粘着剤層
3 接着シート
2 積層シート
9 カバーフィルム
4 半導体ウエハ
5 半導体チップ
501 パッド
502 チップ本体部
41 ダイボンド用チップ
6 被着体
601 端子部
602 本体部
61 半導体チップ付き被着体
7 ボンディングワイヤー
8 封止樹脂
Claims (9)
- 樹脂成分及びBET比表面積10m 2 /g以上の無機フィラーを含み、
前記樹脂成分がアクリル樹脂を含み、
前記無機フィラーの含有量は45重量%〜90重量%であり、
130℃の引張貯蔵弾性率は1MPa〜20MPaであり、
130℃のtanδは0.1〜0.3である、
熱硬化性を備える接着シート。 - tanδの最大値は0.5〜1.4である請求項1に記載の接着シート。
- 25℃〜300℃の範囲を毎分10℃で昇温する条件下のDSC測定により得られる反応熱量は0mJ/mg〜20mJ/mgである請求項1又は2に記載の接着シート。
- 前記無機フィラーの新モース硬度は5以上である請求項1〜3のいずれかに記載の接着シート。
- 前記無機フィラーは、表面不活性化処理が施されている請求項1〜4のいずれかに記載の接着シート。
- 前記アクリル樹脂がエポキシ基及び/又はカルボキシル基を備え、
前記樹脂成分100重量%中の前記アクリル樹脂の含有量は70重量%以上である請求項1〜5のいずれかに記載の接着シート。 - 基材及び前記基材上に配置された粘着剤層を備えるダイシングシートと、
前記粘着剤層上に配置された請求項1〜6のいずれかに記載の接着シートとを備えるダイシングシート付き接着シート。 - カバーフィルムと、
前記カバーフィルム上に配置された請求項7に記載のダイシングシート付き接着シートとを備える積層シート。 - 請求項7に記載のダイシングシート付き接着シートを準備する工程と、
前記接着シートに半導体ウエハを圧着する工程と、
前記接着シート上に配置された前記半導体ウエハをダイシングすることにより、パッドを備える半導体チップ及び前記半導体チップ上に配置された接着フィルムを備えるダイボンド用チップを形成する工程と、
端子部を備える被着体に前記ダイボンド用チップを圧着することによりチップ付き被着体を形成する工程と、
ワイヤーの一端と前記パッドを接合するステップ及び前記ワイヤーの他端と前記端子部を接合するステップを含むワイヤーボンディング工程と、
前記ワイヤーボンディング工程の後に前記チップ付き被着体を加熱することにより前記接着フィルムを硬化させる工程と
を含む半導体装置の製造方法。
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JP2014236371A JP6431343B2 (ja) | 2014-11-21 | 2014-11-21 | 接着シート、ダイシングシート付き接着シート、積層シート及び半導体装置の製造方法 |
TW104137547A TWI676663B (zh) | 2014-11-21 | 2015-11-13 | 接著薄片、附有切割薄片之接著薄片、層合薄片、及半導體裝置之製造方法 |
KR1020150160597A KR102435086B1 (ko) | 2014-11-21 | 2015-11-16 | 접착 시트, 다이싱 시트가 부착된 접착 시트, 적층 시트 및 반도체 장치의 제조 방법 |
CN201510812627.1A CN105623533B (zh) | 2014-11-21 | 2015-11-20 | 粘接片、带切割片的粘接片、层叠片以及半导体装置的制造方法 |
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