JP4381191B2 - 半導体パッケージ及び半導体装置の製造方法 - Google Patents
半導体パッケージ及び半導体装置の製造方法 Download PDFInfo
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- JP4381191B2 JP4381191B2 JP2004081491A JP2004081491A JP4381191B2 JP 4381191 B2 JP4381191 B2 JP 4381191B2 JP 2004081491 A JP2004081491 A JP 2004081491A JP 2004081491 A JP2004081491 A JP 2004081491A JP 4381191 B2 JP4381191 B2 JP 4381191B2
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Description
なお、封止層を形成する工程では、第2のサブ導電部の頂面を覆うように半導体チップの主表面に封止層形成層を形成した後、頂面が露出される高さまで封止層形成層を研磨して封止層を形成する。
また、この発明の半導体パッケージの製造方法によれば、下記のような構成上の特徴を有する。
すなわち、まず、電極パッドが主表面に形成された半導体チップを用意する。次に、この電極パッド上に配置される第1の面を有する第1のサブ導電部と、頂面を含む第2の面を具える第2のサブ導電部とを有する導電部を形成する。次に、この第2のサブ導電部の頂面の一部に凹部を形成する。次に、この凹部内に半田を供給する。次に、この半田の頂面を露出させるように、半導体チップの主表面を覆う封止層を形成する。次に、半田の頂面にフラックスを供給する。次に、フラックスを介して第2のサブ導電部と対向する位置に、表面が半田層からなる半田層付き円柱状コアを配置する。次に、半田層を加熱溶融して半田と接着させて外部端子を形成する。
なお、封止層を形成する工程では、凹部に供給された半田を覆う蓋部を形成し、蓋部を覆うように半導体チップの主表面に封止層形成層を形成した後、半田が露出される高さまで封止層形成層及び蓋部を研磨して封止層を形成する。
図1(A)から図6(B)を参照して、この発明の第1の参考例に係る半導体パッケージ及び半導体装置およびこれらの製造方法について説明する。尚、半導体パッケージとしてWCSPの場合を例に挙げて説明する(以下の各実施の形態についても同様とする)。
凹部形成前の第2のサブ導電部であるポスト部201を、例えば、無電解めっき法等によって銅で形成する(図2(C))。ここでのポスト部201は、例えば、直径約400μm及び高さ約100μmの円柱形状とする。尚、ポスト部の形成には、無電解めっき法のほかに電解めっき法等を用いることができる。
図7(A)から図9(C)を参照して、この発明の第1の実施の形態に係る半導体パッケージ及び半導体装置およびこれらの製造方法について説明する。
図10(A)から図15を参照して、この発明の第2の実施の形態に係る半導体パッケージ及び半導体装置およびこれらの製造方法について説明する。
12:半導体チップ
12a:半導体チップの主表面
14:電極パッド
14a:電極パッドの主表面
15:パッシべーション膜
16:絶縁膜
17、69、79、91、96:導電部
18:配線層(再配線層)(第1のサブ導電部)
18a:第1の面(配線層の電極パッド接触面)
20、70、80:ポスト部(凹部形成後の第2のサブ導電部)
20a、70a、80a:ポスト部の頂面(凹部形成後の第2の面)
24、44、84:外部端子
30:封止層
30a:封止層の表面
35、75、85、90、351、352:凹部
35b:凹部の側面
37、77、89:フラックス
40:半導体ウェハ
42、72、82:マスクパターン
50:実装用基板
53:電極パッド
75a、85a:凹部の底面
75b、85b:凹部の内壁面
86:蓋部
87:半田
87a:半田の頂面
92:第1の配線層(第1のサブ導電部)
92a:第1の面
93:第2の配線層(第2のサブ導電部)
93a:第2の配線層の頂面(第2の面)
95:樹脂
97:第1のサブ導電部
97a:第1の面
98:第2のサブ導電部
98a:第2のサブ導電部の頂面(第2の面)
100、300、500、700、900:半導体装置
201、701、801:ポスト部(凹部形成前の第2のサブ導電部)
201a、701a、801a:ポスト部の頂面(凹部形成前の第2の面)
241、841:半田ボール(半田塊)
242、442、842:コア部
244、444、844:金属層
246、446、846、2461、4461、8461:半田層
301:封止層形成層
441:円柱半田(半田塊)
840:サブ外部端子
Claims (12)
- 電極パッドが主表面に形成された半導体チップを用意する半導体チップ用意工程と、
前記電極パッド上に配置される第1の面を有する第1のサブ導電部と、頂面を含む第2の面を具える第2のサブ導電部とを有する導電部を形成する導電部形成工程と、
前記第2のサブ導電部の頂面を露出させるように、前記半導体チップの主表面を覆う封止層を形成する封止層形成工程と、
前記第2のサブ導電部の頂面の少なくとも一部を除去して、前記封止層の上面よりも下方に底面を有する凹部を形成する凹部形成工程と、
前記凹部にフラックスを供給するフラックス供給工程と、
前記第2のサブ導電部から離れる方向に伸びる外形が柱状であってかつ表面が半田層からなる半田層付き円柱状コアであって、プラスチック材料を含有する中細の円柱形状のコア部を有しており、該コア部の表面に設けられている前記半田層の融点よりも高い融点の材料からなる金属層と、前記半田層とが順次に積層されている前記半田層付き円柱状コアの一端を、前記第2のサブ導電部の前記凹部に挿入して前記半田層付き円柱状コアを配置する半田塊配置工程と、
前記半田層の融点以上であってかつ前記金属層の融点未満の温度で、該半田層を加熱溶融して前記第2のサブ導電部と接着させて外部端子を形成する外部端子形成工程と
を含み、
前記封止層形成工程では、
前記第2のサブ導電部の前記頂面を覆うように前記半導体チップの主表面に封止層形成層を形成した後、前記頂面が露出される高さまで該封止層形成層を研磨して前記封止層を形成する
ことを特徴とする半導体パッケージの製造方法。 - 請求項1に記載の半導体パッケージの製造方法において、
前記柱状の半田層付き円柱状コアとして、該半田層付き円柱状コアの軸方向の中央部の径が該軸方向の両端の径よりも小さい半田層付き円柱状コアを用いることを特徴とする半導体パッケージの製造方法。 - 請求項1または2に記載の半導体パッケージの製造方法において、
前記凹部形成工程では、前記第2のサブ導電部を、前記第2のサブ導電部の頂面から該第2のサブ導電部径の2から10%の範囲内の深さまで除去することを特徴とする半導体パッケージの製造方法。 - 電極パッドが主表面に形成された半導体チップを用意する半導体チップ用意工程と、
前記電極パッド上に配置される第1の面を有する第1のサブ導電部と、頂面を含む第2の面を具える第2のサブ導電部とを有する導電部を形成する導電部形成工程と、
前記第2のサブ導電部の頂面の一部に凹部を形成する凹部形成工程と、
該凹部内に半田を供給する半田供給工程と、
前記半田の頂面を露出させるように、前記半導体チップの主表面を覆う封止層を形成する封止層形成工程と、
前記半田の頂面にフラックスを供給するフラックス供給工程と、
該フラックスを介して前記第2のサブ導電部と対向する位置に、表面が半田層からなる半田層付き円柱状コアを配置する半田塊配置工程と、
該半田層を加熱溶融して前記半田と接着させて外部端子を形成する外部端子形成工程とを含み、
前記封止層形成工程は、
前記凹部に供給された前記半田を覆う蓋部を形成する蓋部形成工程と、
該蓋部を覆うように前記半導体チップの主表面に封止層形成層を形成した後、前記半田が露出される高さまで前記封止層形成層及び前記蓋部を研磨して前記封止層を形成する研磨工程と
を含むことを特徴とする半導体パッケージの製造方法。 - 請求項4に記載の半導体パッケージの製造方法において、
前記フラックス供給工程の前に、露出させた前記第2のサブ導電部の頂面の一部を所定深さ除去することを特徴とする半導体パッケージの製造方法。 - 請求項4または5に記載の半導体パッケージの製造方法において、
前記凹部形成工程では、前記第2のサブ導電部を、該第2のサブ導電部径の10から50%の範囲内の径であって、かつ前記第2のサブ導電部の頂面から該第2のサブ導電部の高さの20から70%の範囲内の深さまで除去することを特徴とする半導体パッケージの製造方法。 - 請求項1ないし6のいずれか一項に記載の半導体パッケージの製造方法において、
前記凹部形成工程では、ウェットエッチングで前記除去を行うことを特徴とする半導体パッケージの製造方法。 - 請求項7に記載の半導体パッケージの製造方法において、
前記ウェットエッチングは、強酸性のウェットエッチング溶液を用いて行うことを特徴とする半導体パッケージの製造方法。 - 請求項1ないし8のいずれか一項に記載の半導体パッケージの製造方法において、
前記導電部形成工程では、前記第1のサブ導電部として前記半導体チップの主表面に沿って延在する配線層を形成するとともに、前記第2のサブ導電部として導電性のポスト部を前記配線層上に形成することを特徴とする半導体パッケージの製造方法。 - 請求項1ないし8のいずれか一項に記載の半導体パッケージの製造方法において、
前記導電部形成工程では、前記第1のサブ導電部として前記半導体チップの主表面に沿って延在する第1の配線層を形成するとともに、前記第2のサブ導電部として前記第1の配線層と接続されかつ前記第1の配線層よりも前記半導体チップの主表面から遠ざかるように第2の配線層を形成することを特徴とする半導体パッケージの製造方法。 - 請求項1ないし8のいずれか一項に記載の半導体パッケージの製造方法において、
前記導電部形成工程では、導電性のポスト部となるように、前記第1のサブ導電部と該第1のサブ導電部上に前記第2のサブ導電部とを形成することを特徴とする半導体パッケージの製造方法。 - 請求項1ないし11のいずれか一項に記載の製造方法によって得られた前記半導体パッケージを、さらに、前記外部端子を介して実装用基板に実装することを特徴とする半導体装置の製造方法。
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US9627254B2 (en) * | 2009-07-02 | 2017-04-18 | Flipchip International, Llc | Method for building vertical pillar interconnect |
US9620469B2 (en) | 2013-11-18 | 2017-04-11 | Taiwan Semiconductor Manufacturing Company, Ltd. | Mechanisms for forming post-passivation interconnect structure |
US20130043573A1 (en) * | 2011-08-15 | 2013-02-21 | Advanced Analogic Technologies (Hong Kong) Limited | Solder Bump Bonding In Semiconductor Package Using Solder Balls Having High-Temperature Cores |
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US8884443B2 (en) * | 2012-07-05 | 2014-11-11 | Advanced Semiconductor Engineering, Inc. | Substrate for semiconductor package and process for manufacturing |
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