JP6216180B2 - 封止用シート、及び、当該封止用シートを用いた半導体装置の製造方法 - Google Patents
封止用シート、及び、当該封止用シートを用いた半導体装置の製造方法 Download PDFInfo
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- JP6216180B2 JP6216180B2 JP2013160535A JP2013160535A JP6216180B2 JP 6216180 B2 JP6216180 B2 JP 6216180B2 JP 2013160535 A JP2013160535 A JP 2013160535A JP 2013160535 A JP2013160535 A JP 2013160535A JP 6216180 B2 JP6216180 B2 JP 6216180B2
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- H01L24/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
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Description
一方の面の表面粗さ(Ra)が、3μm以下であることを特徴とする。
本発明において、前記表面粗さ(Ra)は、硬化前に3μm以下であってもよく、硬化後に3μm以下であってもよく、硬化前及び硬化後に3μm以下であってよい。
すなわち、本発明は、
(1)前記表面粗さ(Ra)が、硬化前に3μm以下であり且つ硬化後は3μm以下ではない場合、
(2)前記表面粗さ(Ra)が、硬化後に3μm以下であり且つ硬化前は3μm以下ではない場合、及び、
(3)前記表面粗さ(Ra)が、硬化前に3μm以下であり且つ硬化後に3μm以下である場合を含む。
電子デバイスを半導体ウエハの回路形成面にフリップチップボンディングする工程Aと、
前記半導体ウエハにフリップチップボンディングされた前記電子デバイスを封止用シートに埋め込んで封止体を形成する工程Bとを有し、
前記封止用シートにおける前記半導体ウエハと対向する面とは反対の面の表面粗さ(Ra)が、3μm以下であることを特徴とする。
半導体チップを半導体ウエハの回路形成面にフリップチップボンディングする工程Aと、
前記半導体ウエハにフリップチップボンディングされた前記半導体チップを封止用シートに埋め込んで封止体を形成する工程Bとを少なくとも有する。
そして、前記封止用シートにおける前記半導体ウエハと対向する面とは反対の面の表面粗さ(Ra)が、3μm以下である。
図1に示すように、本実施形態に係る半導体装置の製造方法では、まず、回路形成面23aを有する1又は複数の半導体チップ23と、回路形成面22aを有する半導体ウエハ22とを準備する。なお、以下では、複数の半導体チップを半導体ウエハにフリップチップボンディングする場合について説明する。
次に、図2に示すように、半導体チップ23を半導体ウエハ22の回路形成面22aにフリップチップボンディングする(工程A)。半導体チップ23の半導体ウエハ22への搭載には、フリップチップボンダーやダイボンダーなどの公知の装置を用いることができる。具体的には、半導体チップ23の回路形成面23aに形成されたバンプ23bと、半導体ウエハ22の回路形成面22aに形成された電極22bとを電気的に接続する。これにより、複数の半導体チップ23が半導体ウエハ22に実装された積層体20が得られる。この際、半導体チップ23の回路形成面23aにアンダーフィル用の樹脂シート24が貼り付けられていてもよい。この場合、半導体チップ23を半導体ウエハ22にフリップチップボンディングすると、半導体チップ23と半導体ウエハ22との間の間隙を樹脂封止することができる。なお、アンダーフィル用の樹脂シート24が貼り付けられた半導体チップ23を半導体ウエハ22にフリップチップボンディングする方法については、例えば、特開2013−115186号公報等に開示されているため、ここでの詳細な説明は省略する。
また、本実施形態に係る半導体装置の製造方法では、図3に示すように、封止用シート10を準備する。封止用シート10は、ポリエチレンテレフタレート(PET)フィルムなどの剥離ライナー11上に積層された状態で準備してもよい。この場合、剥離ライナー11には封止用シート10の剥離を容易に行うために離型処理が施されていてもよい。
封止用シート10は、一方の面の表面粗さ(Ra)が、3μm以下である。なお、当該一方の面は、半導体チップ23を封止する際に、半導体ウエハ22と対向する面とは反対側の面となる。前記表面粗さ(Ra)は、1nm〜2μmであることが好ましく、20nm〜1μmであることがより好ましい。前記表面粗さ(Ra)が、3μm以下と平坦であるため、当該一方の面のレーザーマーキング性に優れる。また、前記一方の面の表面粗さ(Ra)が3μm以下と平坦であるため、外観性に優れる。また、前記一方の面の表面粗さ(Ra)が3μm以下と平坦であるため、研削等の処理が行なわれない場合には、吸着コレットによる吸着が行い易い。その結果、搬送ミスを抑制することができる。表面粗さの測定方法は、実施例に記載の方法による。
なお、封止用シート10の表面粗さ(Ra)を、硬化前に3μm以下とする場合には、硬化前に3μm以下となるように無機充填剤を調整すればよい。また、封止用シート10の表面粗さ(Ra)を、硬化後に3μm以下とする場合には、硬化後に3μm以下となるように無機充填剤を調整すればよい。また、封止用シート10の表面粗さ(Ra)を、硬化前及び硬化後に3μm以下とする場合には、硬化前及び硬化後に3μm以下となるように無機充填剤を調整すればよい。
可視光線透過率(%)=((封止用シート10の透過後の可視光線の光強度)/(可視光線の初期の光強度))×100
(式中、L10は光路長、αは吸光係数、Cは試料濃度を表す)
また、厚さX(μm)での吸光度AXは下記式(2)により表すことができる。
AX=α×LX×C (2)
更に、厚さ20μmでの吸光度A20は下記式(3)により表すことができる。
A10=−log10T10 (3)
(式中、T10は厚さ10μmでの光線透過率を表す)
前記式(1)〜(3)より、吸光度AXは、
AX=A10×(LX/L10)
=−[log10(T10)]×(LX/L10)
と表すことができる。これにより、厚さX(μm)での光線透過率TX(%)は、下記により算出することができる。
TX=10−AX
但し、AX=−[log10(T10)]×(LX/L10)
封止用シートを準備する工程の後、図3に示すように、下側加熱板32上に積層体20を半導体チップ23が実装された面を上にして配置するとともに、積層体20の半導体チップ23が実装された面上に封止用シート10を配置する。この工程においては、下側加熱板32上にまず積層体20を配置し、その後、積層体20上に封止用シート10を配置してもよく、積層体20上に封止用シート10を先に積層し、その後、積層体20と封止用シート10とが積層された積層物を下側加熱板32上に配置してもよい。
次に、図4に示すように、下側加熱板32と上側加熱板34とにより熱プレスして、半導体チップ23を封止用シート10に埋め込む(工程B)。封止用シート10は、半導体チップ23及びそれに付随する要素を外部環境から保護するための封止樹脂として機能することとなる。これにより、半導体ウエハ22上に実装されている半導体チップ23が封止用シート10に埋め込まれた封止体28が得られる。
前記減圧条件としては、圧力が、例えば、0.1〜5kPa、好ましくは、0.1〜100Paであり、減圧保持時間(減圧開始からプレス開始までの時間)が、例えば、5〜600秒であり、好ましくは、10〜300秒である。
次に、剥離ライナー11を剥離する(図5参照)。
次に、封止用シート10を熱硬化する。具体的には、例えば、半導体ウエハ22上に実装されている半導体チップ23が封止用シート10に埋め込まれた封止体28全体を加熱する。
次に、図6に示すように、レーザーマーキング用のレーザー36を用いて、封止用シート10にレーザーマーキングを行なう(以下、「工程E−1」ともいう)。レーザーマーキングの条件としては、特に限定されないが、封止用シート10に、レーザー[波長:532nm]を、強度:0.3W〜2.0Wの条件で照射することが好ましい。また、この際の加工深さ(深度)が2μm以上となるように照射することが好ましい。前記加工深さの上限は特に制限されないが、例えば、2μm〜25μmの範囲から選択することができ、好ましくは3μm以上(3μm〜20μm)であり、より好ましくは5μm以上(5μm〜15μm)である。レーザーマーキングの条件を前記数値範囲内とすることにより、優れたレーザーマーキング性が発揮される。
次に、図7に示すように、封止体28の封止用シート10を研削して半導体チップ23の裏面23cを表出させる(工程C)。封止用シート10を研削する方法としては、特に限定されず、例えば、高速回転する砥石を用いるグラインディング法を挙げることができる。
なお、工程E−1により付されたマーキングは、工程Cにおいて研削した厚さがマーキング深さ(加工深さ)よりも厚い場合は、マーキングは消失する。一方、工程Cにおいて研削した厚さがマーキング深さ(加工深さ)よりも薄い場合は、マーキングは残される。
次に、図8に示すように、レーザーマーキング用のレーザー38を用いて、封止用シート10にレーザーマーキングを行なう(以下、「工程E−2」ともいう)。レーザーマーキングの条件としては、特に限定されないが、封止用シート10に、レーザー[波長:532nm]を、強度:0.3W〜2.0Wの条件で照射することが好ましい。また、この際の加工深さ(深度)が2μm以上となるように照射することが好ましい。前記加工深さの上限は特に制限されないが、例えば、2μm〜25μmの範囲から選択することができ、好ましくは3μm以上(3μm〜20μm)であり、より好ましくは5μm以上(5μm〜15μm)である。レーザーマーキングの条件を前記数値範囲内とすることにより、優れたレーザーマーキング性が発揮される。
次に、半導体ウエハ22における、半導体チップ23が搭載されている側とは反対側の面を研削して、ビア(Via)22cを形成した後(図9参照)、配線27aを有する配線層27を形成する(図10参照)。半導体ウエハ22を研削する方法としては、特に限定されず、例えば、高速回転する砥石を用いるグラインディング法を挙げることができる。配線層27には、配線27aから突出したバンプ27bを形成してもよい。配線層27を形成する方法には、セミアディティブ法や、サブトラクティブ法など、従来公知の回路基板やインターポーザの製造技術を適用することができるから、ここでの詳細な説明は省略する。
続いて、図11に示すように、半導体チップ23の裏面23cが表出している封止体28をダイシングする(工程D)。これにより、半導体チップ23単位での半導体装置29を得ることができる。
必要に応じて、半導体装置29を別途の基板(図示せず)に実装する基板実装工程を行うことができる。半導体装置29の前記別途の基板への実装には、フリップチップボンダーやダイボンダーなどの公知の装置を用いることができる。
また、封止体28の表面の前記表面粗さ(Ra)が3μm以下と平坦であるため、外観性に優れる。具体的に、(1)封止体28の表面の前記表面粗さ(Ra)が、硬化前に3μm以下であり且つ硬化後は3μm以下ではない場合、硬化前の外観性に優れる。(2)封止体28の表面の前記表面粗さ(Ra)が、硬化後に3μm以下であり且つ硬化前は3μm以下ではない場合、硬化後の外観性に優れる。(3)封止体28の表面の前記表面粗さ(Ra)が、硬化前に3μm以下であり且つ硬化後に3μm以下である場合、硬化前及び硬化後の外観性に優れる。
実施例、比較例で使用した成分について説明する。
<成分>
エポキシ樹脂:新日鐵化学(株)製のYSLV−80XY(ビスフェノールF型エポキシ樹脂、エポキン当量200g/eq.軟化点80℃)
フェノール樹脂:明和化成社製のMEH−7851−SS(ビフェニルアラルキル骨格を有するフェノール樹脂、水酸基当量203g/eq.軟化点67℃)
シランカップリング剤:信越化学社製のKBM−403(3−グリシドキシプロピルトリメトキシシラン)
難燃剤:伏見製薬所製のFP−100(フェノキシシクロホスファゼンオリゴマー)
カーボンブラック:三菱化学社製の#20(粒子径50nm)
硬化促進剤:四国化成工業社製の2PHZ−PW(2−フェニル−4,5−ジヒドロキシメチルイミダゾール)
熱可塑性樹脂:カネカ社製のSIBSTAR 072T(ポリスチレン−ポリイソブチレン−ポリスチレン共重合体)
フィラーA:電気化学工業社製のFB−950(溶融球状シリカ粉末、平均粒子径23.8μm)
フィラーB:電気化学工業社製のFB−9454(溶融球状シリカ粉末、平均粒子径19.9μm)
フィラーC:電気化学工業社製のFB−7SDC(親水性フュームドシリカ、平均粒子径5.8nm)
フィラーD:電気化学工業社製のFB−560(溶融球状シリカ粉末、平均粒子径30μm)
上記各成分を下記表1に従って配合し、ロール混練機により60〜120℃、減圧条件下(0.01kg/cm2)で溶融混練し、混練物を調製した。次いで、得られた混練物を、瞬時真空積層装置(ミカドテクノス社製のVS008−1515)の100μmのスペーサ―を設置したプレス板上に、セパレータ(三菱化学社製、製品名「MRF38」、表面粗さ0.038μm)に挟んだ状態で載置し、これを真空プレスした(プレス条件:真空保持時間30秒、加圧時間60秒、圧力203.9g/cm2、プレス温度90℃)。このようにして本実施例1〜3及び比較例1に係る封止用シートを作製した。
実施例、比較例にて作成した封止用シートからセパレータを剥離し、露出面の表面粗さ(Ra)を、JIS B 0601に基づき、WYKO社製の非接触三次元粗さ測定装置(NT3300)を用いて測定した。測定条件は、50倍とし、測定値は、測定データにMedian filterをかけて求めた。測定は、各封止用シートについて、測定箇所を変更しながら5回行い、その平均値を表面粗さ(Ra)とした。これを硬化前の表面粗さとした。結果を下記表1に示す。
また、実施例、比較例にて作成した封止用シートからセパレータを剥離した後、150℃、1時間の条件で封止用シートを硬化させた。その後、硬化前の表面粗さの測定と同様にして、封止用シートの硬化後の表面粗さを測定した。結果を下記表1に示す。
実施例、比較例にて作成した封止用シートからセパレータを剥離し、露出面が上面となるように置き、レーザー印字装置(商品名「MD−S9900」、KEYENCE社製)を用いて、下記の照射条件にて、レーザー印字した。
<レーザー印字の照射条件>
レーザー波長:532nm
レーザーパワー:1.2W
周波数:32kHz
レーザー印字された接着シートに、KEYENCE社の装置名:CA−DDW8を用いて、封止用シート面に対し全方位方向から斜光照明を照射し、CCDカメラ(装置名:CV−0350)(KEYENCE社製)で反射光を取り込んだ。取り込んだ反射光の明度をKEYENCE社の装置名:CV−5000を用いて測定した。明度測定は、レーザー印字部と非印字部との両方に対して行なった。なお、明度とは、白色を100%と黒色を0%とした値であり、本明細書においては、上述したKEYENCE社の装置名、CV−5000を用いて測定した値とする。レーザー印字部の明度と非印字部の明度の差をコントラスト[%]とし、40%以上の場合を○、40%未満の場合を×として評価した。これを硬化前のコントラストとして評価した。結果を表1に示す。
また、実施例、比較例にて作成した封止用シートからセパレータを剥離した後、150℃、1時間の条件で封止用シートを硬化させた。その後、硬化前のコントラスト評価と同様にして、レーザー印字し、コントラストを評価した。これを硬化後のコントラスト評価とした。結果を下記表1に示す。
20 積層体
22 半導体ウエハ
23 半導体チップ
28 封止体
29 半導体装置
Claims (2)
- 電子デバイスの封止に使用する熱硬化性の封止用シートであって、
熱可塑性樹脂と、無機充填剤とを含み、
前記無機充填剤の含有量が、封止用シート全体に対して78〜91重量%であり、
一方の面の表面粗さ(Ra)が、3μm以下であることを特徴とする封止用シート。 - 前記一方の面側に、着色剤が添加されていることを特徴とする請求項1に記載の封止用シート。
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| JP2013160535A JP6216180B2 (ja) | 2013-08-01 | 2013-08-01 | 封止用シート、及び、当該封止用シートを用いた半導体装置の製造方法 |
| SG11201600747VA SG11201600747VA (en) | 2013-08-01 | 2014-06-30 | Sheet for sealing and method for manufacturing semiconductor device using said sheet for sealing |
| KR1020167003670A KR20160037935A (ko) | 2013-08-01 | 2014-06-30 | 봉지용 시트 및 당해 봉지용 시트를 사용한 반도체 장치의 제조 방법 |
| PCT/JP2014/067396 WO2015015982A1 (ja) | 2013-08-01 | 2014-06-30 | 封止用シート、及び、当該封止用シートを用いた半導体装置の製造方法 |
| US14/908,687 US9754894B2 (en) | 2013-08-01 | 2014-06-30 | Sheet for sealing and method for manufacturing semiconductor device using said sheet for sealing |
| CN201480043139.2A CN105431937B (zh) | 2013-08-01 | 2014-06-30 | 密封用片、以及使用了该密封用片的半导体装置的制造方法 |
| TW103125382A TWI631669B (zh) | 2013-08-01 | 2014-07-24 | 密封用片材及使用該密封用片材之半導體裝置之製造方法 |
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| JP2016139763A (ja) * | 2015-01-29 | 2016-08-04 | ソニー株式会社 | 撮像装置、電子機器 |
| WO2017038110A1 (ja) * | 2015-08-28 | 2017-03-09 | 日立化成株式会社 | 半導体装置及びその製造方法 |
| JP2017085412A (ja) * | 2015-10-29 | 2017-05-18 | 日本電波工業株式会社 | 水晶デバイス |
| US9741617B2 (en) * | 2015-11-16 | 2017-08-22 | Amkor Technology, Inc. | Encapsulated semiconductor package and method of manufacturing thereof |
| JP6754183B2 (ja) * | 2015-11-20 | 2020-09-09 | 日東電工株式会社 | 電子デバイス封止用シート、及び、電子デバイスパッケージの製造方法 |
| TWI675074B (zh) * | 2016-12-09 | 2019-10-21 | 南韓商Lg化學股份有限公司 | 封裝組成物 |
| US10522526B2 (en) | 2017-07-28 | 2019-12-31 | Taiwan Semiconductor Manufacturing Company, Ltd. | LTHC as charging barrier in InFO package formation |
| JP2020035820A (ja) * | 2018-08-28 | 2020-03-05 | 太陽誘電株式会社 | モジュールおよびその製造方法 |
| JP6795673B2 (ja) * | 2019-12-19 | 2020-12-02 | 日東電工株式会社 | 電子デバイス封止用シート、及び、電子デバイスパッケージの製造方法 |
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| US5641997A (en) | 1993-09-14 | 1997-06-24 | Kabushiki Kaisha Toshiba | Plastic-encapsulated semiconductor device |
| JP3378374B2 (ja) * | 1993-09-14 | 2003-02-17 | 株式会社東芝 | 樹脂封止型半導体装置の製造方法、樹脂封止型半導体装置及び封止用樹脂シート |
| US6365968B1 (en) * | 1998-08-07 | 2002-04-02 | Corning Lasertron, Inc. | Polyimide/silicon oxide bi-layer for bond pad parasitic capacitance control in semiconductor electro-optical device |
| TW465123B (en) * | 2000-02-02 | 2001-11-21 | Ind Tech Res Inst | High power white light LED |
| JP2002229200A (ja) * | 2001-02-02 | 2002-08-14 | Hitachi Chem Co Ltd | 感光性フィルム |
| DE602004002623T2 (de) * | 2003-07-17 | 2007-01-18 | Nitto Denko Corporation, Ibaraki | Verfahren zur Herstellung eines Harzverkapselungsscheibchens für Halbleiter |
| TWI263403B (en) * | 2004-01-22 | 2006-10-01 | Murata Manufacturing Co | Electronic component manufacturing method |
| JP4730652B2 (ja) | 2004-06-02 | 2011-07-20 | ナガセケムテックス株式会社 | 電子部品の製造方法 |
| JP4682796B2 (ja) * | 2005-04-19 | 2011-05-11 | 日立化成工業株式会社 | 封止用シート |
| US7422707B2 (en) * | 2007-01-10 | 2008-09-09 | National Starch And Chemical Investment Holding Corporation | Highly conductive composition for wafer coating |
| JP4430085B2 (ja) * | 2007-03-01 | 2010-03-10 | 日東電工株式会社 | ダイシング・ダイボンドフィルム |
| JP5101931B2 (ja) * | 2007-06-13 | 2012-12-19 | 日東電工株式会社 | 熱硬化型接着シート |
| JP5144433B2 (ja) * | 2008-08-28 | 2013-02-13 | 古河電気工業株式会社 | チップ保護用フィルム |
| JP5135246B2 (ja) * | 2009-01-30 | 2013-02-06 | 三洋電機株式会社 | 半導体モジュールおよびその製造方法、ならびに携帯機器 |
| TW201213441A (en) * | 2010-05-10 | 2012-04-01 | Ajinomoto Kk | Resin composition |
| JP5048815B2 (ja) | 2010-07-20 | 2012-10-17 | 日東電工株式会社 | フリップチップ型半導体裏面用フィルム、及び、ダイシングテープ一体型半導体裏面用フィルム |
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| JP5385247B2 (ja) * | 2010-12-03 | 2014-01-08 | 信越化学工業株式会社 | ウエハモールド材及び半導体装置の製造方法 |
| US8823186B2 (en) * | 2010-12-27 | 2014-09-02 | Shin-Etsu Chemical Co., Ltd. | Fiber-containing resin substrate, sealed substrate having semiconductor device mounted thereon, sealed wafer having semiconductor device formed thereon, a semiconductor apparatus, and method for manufacturing semiconductor apparatus |
| JP2013007028A (ja) * | 2011-05-20 | 2013-01-10 | Nitto Denko Corp | 封止用シートおよび電子部品装置 |
| JP5884477B2 (ja) * | 2011-12-27 | 2016-03-15 | 日立化成株式会社 | 半導体装置の製造方法、それにより得られる半導体装置及びそれに用いる熱硬化性樹脂組成物 |
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| CN105431937A (zh) | 2016-03-23 |
| TWI631669B (zh) | 2018-08-01 |
| CN105431937B (zh) | 2021-06-25 |
| US20160211217A1 (en) | 2016-07-21 |
| KR20160037935A (ko) | 2016-04-06 |
| JP2015032660A (ja) | 2015-02-16 |
| WO2015015982A1 (ja) | 2015-02-05 |
| TW201515158A (zh) | 2015-04-16 |
| SG11201600747VA (en) | 2016-03-30 |
| US9754894B2 (en) | 2017-09-05 |
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