JP2006073953A - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- JP2006073953A JP2006073953A JP2004258739A JP2004258739A JP2006073953A JP 2006073953 A JP2006073953 A JP 2006073953A JP 2004258739 A JP2004258739 A JP 2004258739A JP 2004258739 A JP2004258739 A JP 2004258739A JP 2006073953 A JP2006073953 A JP 2006073953A
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Abstract
【解決手段】 導電パターン12cが形成されたキャリア基板11上に半導体チップ14を実装するとともに、キャリア基板11の裏面に設けられたランド12aの接合面にハーフスリット19を形成し、突出電極18をランド12aに接合させるとともに、マザーボード1上に設けられたランド2に突出電極18を接合させることにより、キャリア基板11をマザーボード1上に実装する。
【選択図】 図1
Description
また、近年では、携帯電話などの小型化、高性能化および高機能化に対応して、チップサイズパッケージまたはボールグリッドアレイなどの半導体パッケージが携帯電話に搭載されるようになっている。このため、製品落下時の衝撃に対する耐性を向上させるために、ニッケルおよび金メッキをランドの素地上に施すことなく、半田ボールまたは鉛フリーボールを銅の素地上に直接接合させることが行われている。
一方、ニッケルおよび金メッキをランドに施すと、せん断強度、温度サイクル耐性およびボールシェア強度は確保することができるが、(Cu,Ni)6Sn5という合金の引き剥がし方向の強度が弱いため、製品落下時の衝撃に対する耐性が劣化するという問題があった。
これにより、接合面積を増大させることを可能としつつ、突出電極をランドに食い込ませることが可能となり、ランドに接合される突出電極が横方向に移動することを抑制することができる。このため、せん断強度の劣化を抑制しつつ、引き剥がし方向の強度を確保することが可能となり、温度サイクル耐性およびボールシェア強度を確保することが可能となるとともに、衝撃に対する耐性を向上させることができる。
これにより、接合面積を増大させることを可能としつつ、突出電極をランドに食い込ませることが可能となり、せん断強度の劣化を抑制しつつ、引き剥がし方向の強度を確保することが可能となる。
これにより、接合面積を増大させることを可能としつつ、突出電極をランドに食い込ませることが可能となり、せん断強度の劣化を抑制しつつ、引き剥がし方向の強度を確保することが可能となる。
これにより、接合面積を増大させることを可能としつつ、突出電極をランドに食い込ませることが可能となり、せん断強度の劣化を抑制しつつ、引き剥がし方向の強度を確保することが可能となる。
これにより、ランドの素地上に突出電極を接合させた上で、突出電極をメッキ層にも接合させることが可能となるとともに、突出電極をメッキ層に食い込ませることが可能となる。このため、ランドの素地との間の接合部分にて引き剥がし方向の強度を確保することが可能となるとともに、メッキ層との間の接合部分にてせん断強度を確保することが可能となり、せん断強度の劣化を抑制しつつ、衝撃に対する耐性を向上させることが可能となる。
これにより、突出電極をメッキ層に安定して接合させることが可能となり、メッキ層との間の接合部分にてせん断強度を確保することが可能となる。
これにより、半導体パッケージの実装面積を低減することを可能としつつ、せん断強度および衝撃に対する耐性を確保することができ、携帯電話などの携帯機器の小型化、高性能化および高機能化を図ることができる。
これにより、半田ボールまたは鉛フリーボールを銅の素地上に直接接合させることが可能となり、製品落下時の衝撃に対する耐性を向上させることが可能となる。
また、本発明の一態様に係る半導体装置の製造方法によれば、半導体チップの実装面と異なる領域に配置されたランドをキャリア基板上に形成する工程と、前記ランドの周囲をソルダーレジストで覆う工程と、前記ランドの表面加工または表面処理を行うことにより、表面粗さが20〜100μmの粗面を前記ランドの表面に形成する工程と、前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする。
また、本発明の一態様に係る半導体装置の製造方法によれば、半導体チップの実装面と異なる領域に配置され、貫通スリットまたは切り込みが設けられたランドをキャリア基板上に形成する工程と、前記ランドの周囲をソルダーレジストで覆う工程と、前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする。
また、本発明の一態様に係る半導体装置の製造方法によれば、半導体チップの実装面と異なる領域に配置されたランドをキャリア基板上に形成する工程と、前記ランドの接合面の一部をレジストで覆った状態で前記ランドのハーフエッチングを行うことにより、前記ランドの接合面上にスリットまたは凹部を形成する工程と、前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする。
また、本発明の一態様に係る半導体装置の製造方法によれば、半導体チップの実装面と異なる領域に配置されたランドをキャリア基板上に形成する工程と、前記ランドの接合面の一部をレジストで覆った状態でメッキ処理を行うことにより、前記ランドの接合面上の前記レジストから露出された部分にメッキ層を形成する工程と、前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする。
また、本発明の一態様に係る半導体装置の製造方法によれば、前記ランドに接合された突出電極を介し、前記半導体チップが実装されたキャリア基板をマザーボード上に搭載する工程をさらに備えることを特徴とする。
図1は、本発明の一実施形態に係る半導体装置の概略構成を示す断面図である。
図1において、キャリア基板11の表面には導電パターン12cが形成されるとともに、キャリア基板11の裏面にはランド12aが形成されている。ここで、ランド12aの接合面には、ハーフスリット19が形成されている。
なお、キャリア基板11としては、例えば、両面基板、多層配線基板、ビルドアップ基板、テープ基板またはフィルム基板などを用いることができ、キャリア基板11の材質としては、例えば、ポリイミド樹脂、ガラスエポキシ樹脂、BTレジン、アラミドとエポキシのコンポジットまたはセラミックなどを用いることができる。また、導電パターン12cおよびランド2、12aの素材としては、例えば、Cuを用いることができる。また、突出電極18としては、例えば、半田ボールや鉛フリーボールの他、Auバンプ、半田材などで被覆されたCuバンプやNiバンプなどを用いることができ、ボンディングワイヤ16としては、例えば、AuワイヤやAlワイヤなどを用いることができる。また、接着層15としては、例えば、Agペーストなどを用いることができる。鉛フリーボールとしては、Sn−Ag−Cuの合金や、Sn−Ag−Cu−Biの合金を用いてもよい。
また、ランド12aの接合面にハーフスリット19を形成することにより、突出電極18とランド12aとの接合面積を増大させることを可能としつつ、突出電極18をランド12aに食い込ませることが可能となり、ランド12aに接合される突出電極18が横方向に移動することを抑制することができる。このため、ランド12aの素地に突出電極18を直接接合させた場合においても、せん断強度の劣化を抑制することが可能となり、温度サイクル耐性およびボールシェア強度を確保することを可能としつつ、衝撃に対する耐性を向上させることができる。
さらに、上述した実施形態では、マザーボード1上に設けられたランド2については、ランド2の接合面が平坦となるように構成する方法について説明したが、マザーボード1上に設けられたランド2についても、ランド2の接合面にハーフスリット19を形成するようにしてもよい。
図2(a)において、キャリア基板11の両面に銅箔12、12´をそれぞれ貼り付ける。そして、図2(b)に示すように、銅箔12、12´をそれぞれパターニングすることにより、キャリア基板11上に導電パターン12cを形成するとともに、キャリア基板11の裏面にランド12a、12a´を形成する。
次に、図2(c)に示すように、キャリア基板11を貫通させる開口部を形成し、導電性材料を開口部内に埋め込むことにより、キャリア基板11に内部配線12bを形成する。なお、開口部内に埋め込む導電性材料としては、例えば、Cuペーストなどを用いることができる。
次に、図2(g)に示すように、接着層15を介し半導体チップ14をキャリア基板11上に実装する。そして、ボンディングワイヤ16を介してパッド電極14aと導電パターン12cとを接続した後、封止樹脂17にて半導体チップ14を封止する。そして、図1に示すように、突出電極18をランド2、12aに接合させることにより、キャリア基板11をマザーボード1上に実装する。
図3は、本発明の第2実施形態に係る回路基板の製造方法を示す断面図である。
これにより、ランド22aを形成する時に貫通スリット29をランド22aに同時に形成することが可能となり、突出電極をランドランド22aに食い込ませることが可能となる。このため、工程増を伴うことなく、引き剥がし方向の強度を確保することが可能となるとともに、せん断強度の劣化を抑制することができる。なお、貫通スリット29の代わりに、ランド22aの周囲に切り込みを形成するようにしてもよい。
図4(a)において、キャリア基板31の両面に銅箔32、32´をそれぞれ貼り付ける。そして、図4(b)に示すように、銅箔32、32´をそれぞれパターニングすることにより、キャリア基板31上に導電パターン32cを形成するとともに、キャリア基板31の裏面にランド32aを形成する。
次に、図4(e)に示すように、ランド32aの表面加工または表面処理を行うことにより、表面粗さが20〜100μmの粗面39をランド32aの表面に形成する。ここで、ランド32aの表面加工の方法としては、例えば、表面に凹凸が形成されたスタンピング治具をランド32a上に押し付けるようにしてもよいし、ガラスビーズなどの研磨剤を含む水溶液または空気をランド32aの表面に吹き付けるようにしてもよい。
図5において、キャリア基板51の表面には導電パターン52cが形成されるとともに、キャリア基板51の裏面にはランド52aが形成されている。ここで、ランド52aの接合面の一部には、メッキ層59が形成されている。なお、メッキ層19としては、例えば、Pdの単層構造、Auの単層構造、Snの単層構造、Ni/Auの積層構造、Pd/Niの積層構造またはPd/Ni/Auの積層構造を用いることができる。
そして、突出電極58をランド52aに接合させることにより、ランド52aの素地に突出電極58を直接接合させた上で、メッキ層59にも突出電極58を接合させることができる。
図6は、図5の半導体装置の製造方法を示す断面図である。
次に、図6(c)に示すように、キャリア基板51を貫通させる開口部を形成し、導電性材料を開口部内に埋め込むことにより、キャリア基板51に内部配線52bを形成する。そして、図6(d)に示すように、ランド52aの周囲を被覆するソルダーレジスト層53をキャリア基板51上に形成する。
図7(a)に示すように、ランド61の周囲の接合面上にメッキ層62を形成することができる。これにより、ランド61の接合面の一部にメッキ層62を形成することができ、ランド61の素地上に突出電極を接合させた上で、突出電極をメッキ層62にも接合させることが可能となるとともに、突出電極をメッキ層62に食い込ませることが可能となる。このため、ランド61の素地との間の接合部分にて引き剥がし方向の強度を確保することが可能となるとともに、メッキ層62との間の接合部分にてせん断強度を確保することが可能となり、せん断強度の劣化を抑制しつつ、衝撃に対する耐性を向上させることが可能となる。
Claims (13)
- 半導体チップが実装されたキャリア基板と、
前記キャリア基板に形成され、前記半導体チップの実装面と異なる領域に配置されたランドとを備え、
表面粗さが20〜100μmの粗面が前記ランドの接合面に形成されていることを特徴とする半導体装置。 - 半導体チップが実装されたキャリア基板と、
前記キャリア基板に形成され、前記半導体チップの実装面と異なる領域に配置されたランドとを備え、
凹部が前記ランドの接合面に形成されていることを特徴とする半導体装置。 - 半導体チップが実装されたキャリア基板と、
前記キャリア基板に形成され、前記半導体チップの実装面と異なる領域に配置されたランドとを備え、
スリットが前記ランドの接合面に形成されていることを特徴とする半導体装置。 - 半導体チップが実装されたキャリア基板と、
前記キャリア基板に形成され、前記半導体チップの実装面と異なる領域に配置されたランドとを備え、
切り込みが前記ランドの接合面に形成されていることを特徴とする半導体装置。 - 半導体チップが実装されたキャリア基板と、
前記キャリア基板に形成され、前記半導体チップの実装面と異なる領域に配置されたランドと、
前記ランドの接合面の一部に形成されたメッキ層とを備えることを特徴とする半導体装置。 - 前記メッキ層は、Pdの単層構造、Auの単層構造、Snの単層構造、Ni/Auの積層構造、Pd/Niの積層構造またはPd/Ni/Auの積層構造であることを特徴とする請求項5記載の半導体装置。
- 前記ランドに接合された突出電極と、
前記突出電極を介して前記キャリア基板が搭載されたマザーボードとをさらに備えることを特徴とする請求項1から6のいずれか1項記載の半導体装置。 - 前記ランドの素地はCu、前記突出電極は半田ボールまたは鉛フリーボールであることを特徴とする請求項7記載の半導体装置。
- 半導体チップの実装面と異なる領域に配置されたランドをキャリア基板上に形成する工程と、
前記ランドの周囲をソルダーレジストで覆う工程と、
前記ランドの表面加工または表面処理を行うことにより、表面粗さが20〜100μmの粗面を前記ランドの表面に形成する工程と、
前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする半導体装置の製造方法。 - 半導体チップの実装面と異なる領域に配置され、接合面に貫通スリットまたは切り込みが設けられたランドをキャリア基板上に形成する工程と、
前記ランドの周囲をソルダーレジストで覆う工程と、
前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする半導体装置の製造方法。 - 半導体チップの実装面と異なる領域に配置されたランドをキャリア基板上に形成する工程と、
前記ランドの接合面の一部をレジストで覆った状態で前記ランドのハーフエッチングを行うことにより、前記ランドの接合面上にスリットまたは凹部を形成する工程と、
前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする半導体装置の製造方法。 - 半導体チップの実装面と異なる領域に配置されたランドをキャリア基板上に形成する工程と、
前記ランドの接合面の一部をレジストで覆った状態でメッキ処理を行うことにより、前記ランドの接合面上の前記レジストから露出された部分にメッキ層を形成する工程と、
前記キャリア基板上に半導体チップを実装する工程とを備えることを特徴とする半導体装置の製造方法。 - 前記ランドに接合された突出電極を介し、前記半導体チップが実装されたキャリア基板をマザーボード上に搭載する工程をさらに備えることを特徴とする請求項9から12のいずれか1項記載の半導体装置の製造方法。
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JP2009004772A (ja) * | 2007-06-19 | 2009-01-08 | Samsung Electro-Mechanics Co Ltd | 実装基板及びその製造方法 |
JP2011096803A (ja) * | 2009-10-29 | 2011-05-12 | Fujitsu Ltd | 半導体装置とその製造方法 |
JP2015220455A (ja) * | 2014-05-16 | 2015-12-07 | インテル・コーポレーション | 集積回路パッケージ用のコンタクトパッド |
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JP2013002938A (ja) * | 2011-06-16 | 2013-01-07 | Seiko Epson Corp | センサーデバイス、およびその製造方法 |
JP6099453B2 (ja) * | 2012-11-28 | 2017-03-22 | Dowaメタルテック株式会社 | 電子部品搭載基板およびその製造方法 |
JP2020150172A (ja) | 2019-03-14 | 2020-09-17 | キオクシア株式会社 | 半導体装置 |
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JP4021104B2 (ja) * | 1999-08-05 | 2007-12-12 | セイコーインスツル株式会社 | バンプ電極を有する半導体装置 |
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US6696757B2 (en) * | 2002-06-24 | 2004-02-24 | Texas Instruments Incorporated | Contact structure for reliable metallic interconnection |
US6762503B2 (en) * | 2002-08-29 | 2004-07-13 | Micron Technology, Inc. | Innovative solder ball pad structure to ease design rule, methods of fabricating same and substrates, electronic device assemblies and systems employing same |
US7015590B2 (en) * | 2003-01-10 | 2006-03-21 | Samsung Electronics Co., Ltd. | Reinforced solder bump structure and method for forming a reinforced solder bump |
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