JP2014049592A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP2014049592A JP2014049592A JP2012190993A JP2012190993A JP2014049592A JP 2014049592 A JP2014049592 A JP 2014049592A JP 2012190993 A JP2012190993 A JP 2012190993A JP 2012190993 A JP2012190993 A JP 2012190993A JP 2014049592 A JP2014049592 A JP 2014049592A
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Abstract
【解決手段】サポート基板上に大径の第1半導体チップを搭載した後、この第1半導体チップ上に小径の第2半導体チップを搭載することにより、第1半導体チップ上に搭載される第2半導体チップの傾きやガタつきを抑制できるので、第1半導体チップと第2半導体チップの接続部に過剰なストレスが加わることを抑制することができる。
【選択図】図21
Description
(a)第1主面、前記第1主面に形成された第1主面パッド、前記第1主面パッド上に形成された第1導電性部材を有する第1半導体チップを、前記第1主面とは反対側の第1裏面がサポート基板と対向するように配置して、前記サポート基板上に搭載する工程;
(b)前記(a)工程の後、第2主面、前記第2主面に形成された第2主面パッド、前記第2主面パッド上に形成された第2導電性部材、前記第2主面とは反対側の第2裏面に形成され、かつ前記第2主面パッドと電気的に接続された第2裏面パッドを有し、前記第1半導体チップよりも外形寸法が小さい第2半導体チップを、前記第2裏面が前記第1半導体チップの前記第1主面と対向するように配置して、前記第1半導体チップの前記第1主面上に搭載し、前記第1導電性部材を介して前記第1半導体チップの前記第1主面パッドと前記第2半導体チップの前記第2裏面パッドを電気的に接続する工程;
(c)前記(b)工程の後、前記第1半導体チップ、前記第2半導体チップ、および前記第2導電性部材を封止材により封止する工程;
(d)前記(c)工程の後、第3面、前記第3面に形成された複数のボンディングリード、前記第3面とは反対側の第4面に形成された複数のバンプランドを有するベース基板を、前記第3面が前記サポート基板と対向するように配置して前記封止材で固定し、前記ベース基板の前記ボンディングリードと前記第2半導体チップの前記第2導電性部材を電気的に接続する工程;
(e)前記(d)工程の後、前記ベース基板の前記複数のバンプランドのそれぞれに外部端子を配置する工程。
<半導体装置>
図1は、実施の形態1の半導体装置の上面側平面図である。図2は、この半導体装置の裏面側平面図である。図3は、図1のA−A線断面図である。
以下、本実施の形態1の半導体装置10の製造方法について、図面を参照しながら工程順に説明する。
図9(a)は、本実施の形態1の半導体装置の製造に用いる大型基板のチップ搭載面を示す平面図、同図(b)は、この大型基板の断面図である。
次に、図11(大型基板100の平面図)および図12(大型基板100の一つのデバイス領域を示す断面図)に示すように、大型基板100の各デバイス領域にメモリチップ13を搭載する。メモリチップ13の搭載は、メモリチップ13の裏面(接着剤48が貼り付けられた面、第1裏面)を大型基板100のチップ搭載面(第1面)と対向させる、いわゆるフェイスアップ実装方式によって行う。すなわち、接着剤48を介してメモリチップ13の裏面を大型基板100のチップ搭載面に貼り付けた後、大型基板100を加熱し、接着剤48を硬化させることによって、メモリチップ13を大型基板100のチップ搭載面に固定する。大型基板100のデバイス領域とメモリチップ13との位置合わせは、例えば大型基板100の各デバイス領域に形成した基準マーク22を利用して行う。
次に、図18に示すように、大型基板100のチップ搭載面上にフィルム状の封止材49を搭載する。この封止材49は、前述したNCFである。封止材49は、メモリチップ13とマイコンチップ12とを封止する部材であり、マイコンチップ12の主面に形成されたバンプ電極36が露出しないような厚い膜厚を有している。また、封止材49は、大型基板100の外形寸法と同じ外形寸法を有しており、大型基板100のチップ搭載面全体を覆うように搭載する。
次に、図25に示すように、大型配線基板200の実装面に形成された複数のバンプランド15のそれぞれの表面に半田ボール18を接続する。バンプランド15の表面に半田ボール18を接続するには、あらかじめフラックス剤を塗布したバンプランド15の表面に半田ボール18を仮固定した後、半田ボール18を加熱リフローさせる。
その後、大型配線基板200および大型基板100をそれぞれのデバイス領域の外縁(ダイシングラインDL1、DL2)に沿って切断することにより、図1〜図3に示した本実施の形態1の半導体装置10が完成する。
前述した実施の形態1では、サブ基板50(大型基板100)に配線層を設けないが、例えば図26に示すように、サブ基板50(大型基板100)を構成する絶縁材の両面(チップ搭載面および裏面)に配線51を形成してもよい。
前述した実施の形態1の製造方法では、大型基板100のチップ搭載面上にメモリチップ13とマイコンチップ12とを搭載した後、大型基板100と大型配線基板200とを重ね合わせた。これに対し、本実施の形態2の製造方法では、大型基板100のチップ搭載面上にメモリチップ13とマイコンチップ12とを搭載した後、マイコンチップ12の主面上にベース基板(大型配線基板)を形成する。
前述した実施の形態2では、ボールマウント工程後に大型基板100を取り除いたが、実施の形態1と同じように、大型基板100を残してもよい。この場合は、図39に示すように、大型基板100を切断して得られたサブ基板(サポート基板)71がメモリチップ13の裏面側に固定されるので、半導体装置70の機械的強度を向上させることができる。なお、この場合は、メモリチップ13に入射する光がサブ基板71によって遮蔽されるので、大型基板100の表面に黒色のソルダーレジスト63を設けなくともよい。
例えば、前記実施の形態1、2では、半導体装置の外部端子として、ベース基板のバンプランド(電極パッド)の表面にボール(球体)状の半田材(半田ボール)を形成する、いわゆるBGA(Ball Grid Array)構造を採用したが、半田ボールに代えて、バンプランドの表面を少量の半田材で被覆する、いわゆるLGA(Land Grid Array)構造を採用してもよい。
また、前記実施の形態1、2では、メモリチップとしてDRAMが形成された半導体チップを例示したが、メモリチップは、フラッシュメモリが形成された半導体チップや、SRAM(Static Random Access Memory)が形成された半導体チップでもよい。
また、前記実施の形態1、2では、ベース基板(大型配線基板)として2層配線基板を例示したが、4層またはそれ以上の配線層を有する多層配線基板でもよい。
11 ベース基板(基材)
12 マイコンチップ(第2半導体チップ)
13 メモリチップ(第1半導体チップ)
14 ボンディングリード(電極パッド)
15 バンプランド(電極パッド)
16 スルーホール配線
17 ソルダーレジスト(絶縁層)
18 半田ボール(半田材)
19 配線
20、21 半導体ウエハ
22 基準マーク
23 ダイシングフィルム
30 シリコン基板
31 配線
32 層間絶縁膜
33 コンタクト層
34 表面保護膜(パッシベーション膜)
35 主面パッド(第2主面パッド、電極パッド)
36 バンプ電極(第2導電性部材)
37 貫通電極
38 裏面パッド
40 シリコン基板
41 配線
42 層間絶縁膜
43 コンタクト層
44 表面保護膜(パッシベーション膜)
45 主面パッド(第1主面パッド、電極パッド)
46 バンプ電極(第1導電性部材)
47 接着剤(第2接着剤)
48 接着剤(第1接着剤)
49 封止材
50 サブ基板(サポート基板)
51 配線
52 貫通電極(導電性部材)
60 絶縁フィルム(フィルム)
61 開口
62 配線
63 ソルダーレジスト(絶縁膜)
64 絶縁フィルム
65 スルーホール(開口)
66 配線
67 ソルダーレジスト(絶縁膜)
68 バンプランド(電極パッド)
69 ベース基板
70 半導体装置
71 サブ基板(サポート基板)
100 大型基板
200 大型配線基板
Claims (15)
- 以下の工程を含む半導体装置の製造方法:
(a)第1面を有するサポート基板を準備する工程;
(b)前記(a)工程の後、第1主面、前記第1主面に形成された第1半導体素子、前記第1主面に形成され、かつ前記第1半導体素子と電気的に接続された第1主面パッド、前記第1主面パッド上に形成された第1導電性部材、および前記第1主面とは反対側の第1裏面を有する第1半導体チップを、前記第1半導体チップの前記第1裏面が前記サポート基板の前記第1面と対向するように、前記サポート基板の前記第1面上に搭載する工程;
(c)前記(b)工程の後、第2主面、前記第2主面に形成された第2半導体素子、前記第2主面に形成され、かつ前記第2半導体素子と電気的に接続された第2主面パッド、前記第2主面パッド上に形成された第2導電性部材、前記第2主面とは反対側の第2裏面、および前記第2裏面に形成され、かつ前記第2主面パッドと電気的に接続された第2裏面パッドを有する第2半導体チップを、前記第2半導体チップの前記第2裏面が前記第1半導体チップの前記第1主面と対向するように、前記第1半導体チップの前記第1主面上に搭載し、前記第1導電性部材を介して前記第1半導体チップの前記第1主面パッドと前記第2半導体チップの前記第2裏面パッドを電気的に接続する工程;
ここで、前記第2半導体チップの外形寸法は、前記第1半導体チップの外形寸法よりも小さい、
(d)前記(c)工程の後、前記第1半導体チップ、前記第2半導体チップ、および前記第2導電性部材を封止材により封止する工程;
(e)前記(d)工程の後、第3面、前記第3面に形成された複数のボンディングリード、前記第3面とは反対側の第4面、および前記第4面に形成された複数のバンプランドを有するベース基板を、前記ベース基板の前記第3面が前記サポート基板の前記第1面と対向するように前記サポート基板の前記第1面上に配置し、前記封止材で前記ベース基板を固定し、前記ベース基板の前記ボンディングリードと前記第2半導体チップの前記第2導電性部材を電気的に接続する工程;
(f)前記(e)工程の後、前記ベース基板の前記複数のバンプランドのそれぞれに外部端子を配置する工程。 - 前記封止材は、NCFである請求項1に記載の半導体装置の製造方法。
- 前記封止材は、熱硬化性樹脂からなり、
前記(d)工程は、前記封止材の硬化反応が始まらない温度にて行い、
前記(e)工程は、前記封止材の硬化反応が始まる温度にて行う請求項1に記載の半導体装置の製造方法。 - 前記(d)工程において、前記ベース基板と前記サポート基板との間には、前記封止材が充填される請求項1に記載の半導体装置の製造方法。
- 前記(c)工程は、前記第1半導体チップの前記第1主面と、前記第2半導体チップの前記第2裏面との間に接着剤を充填する工程を含む請求項1に記載の半導体装置の製造方法。
- 前記接着剤は、NCFまたはNCPである請求項5に記載の半導体装置の製造方法。
- 前記第2半導体チップの前記第2裏面パッドは、前記第2半導体チップ内に形成された貫通電極を介して前記第2主面パッドと電気的に接続されている請求項1に記載の半導体装置の製造方法。
- 前記第1半導体チップは、メモリ回路が形成されたメモリチップであり、前記第2半導体チップは、前記第1半導体チップの前記メモリ回路を制御する制御回路が形成されたマイコンチップである請求項1に記載の半導体装置の製造方法。
- 前記第1半導体チップの前記メモリ回路は、DRAM回路である請求項8に記載の半導体装置の製造方法。
- 前記(a)工程で準備する前記サポート基板の前記第1面に配線が形成されており、
前記(d)工程の後、前記封止材に貫通電極を形成し、前記サポート基板に形成された前記配線と前記ベース基板に形成された前記ボンディングリードを前記貫通電極を通じて電気的に接続する請求項1に記載の半導体装置の製造方法。 - 以下の工程を含む半導体装置の製造方法:
(a)第1面を有するサポート基板を準備する工程;
(b)前記(a)工程の後、第1主面、前記第1主面に形成された第1半導体素子、前記第1主面に形成され、かつ前記第1半導体素子と電気的に接続された第1主面パッド、前記第1主面パッド上に形成された第1導電性部材、および前記第1主面とは反対側の第1裏面を有する第1半導体チップを、前記第1半導体チップの前記第1裏面が前記サポート基板の前記第1面と対向するように、前記サポート基板の前記第1面上に搭載する工程;
(c)前記(b)工程の後、第2主面、前記第2主面に形成された第2半導体素子、前記第2主面に形成され、かつ前記第2半導体素子と電気的に接続された第2主面パッド、前記第2主面とは反対側の第2裏面、および前記第2裏面に形成され、かつ前記第2主面パッドと電気的に接続された第2裏面パッドを有する第2半導体チップを、前記第2半導体チップの前記第2裏面が前記第1半導体チップの前記第1主面と対向するように、前記第1半導体チップの前記第1主面上に搭載し、前記第1導電性部材を介して前記第1半導体チップの前記第1主面パッドと前記第2半導体チップの前記第2裏面パッドを電気的に接続する工程;
ここで、前記第2半導体チップの外形寸法は、前記第1半導体チップの外形寸法よりも小さい、
(d)前記(c)工程の後、前記第1および第2半導体チップを接着材により封止する工程;
(e)前記(d)工程の後、前記接着剤上に第1絶縁材を配置し、前記第2半導体チップ上の前記第1絶縁材に開口を形成することにより、前記開口の底部に前記第2半導体チップの前記第2主面パッドを露出させる工程;
(f)前記(e)工程の後、前記第1絶縁材上に配線を形成し、前記開口を通じて前記配線と前記第2主面パッドを電気的に接続する工程;
(g)前記(f)工程の後、前記配線上および前記第1絶縁材上に第2絶縁材を配置し、前記配線上の前記第2絶縁材を除去して前記配線の一部を露出させることにより、複数のバンプランドを形成する工程;
(h)前記(g)工程の後、前記複数のバンプランドのそれぞれに外部端子を配置する工程。 - 前記接着剤は、NCFまたはNCPである請求項11に記載の半導体装置の製造方法。
- 前記第2半導体チップの前記第2裏面パッドは、前記第2半導体チップ内に形成された貫通電極を介して前記第2主面パッドと電気的に接続されている請求項11に記載の半導体装置の製造方法。
- 前記第1半導体チップは、メモリ回路が形成されたメモリチップであり、前記第2半導体チップは、前記第1半導体チップの前記メモリ回路を制御する制御回路が形成されたマイコンチップである請求項11に記載の半導体装置の製造方法。
- 前記(h)工程の後、前記サポート基板を除去する請求項11に記載の半導体装置の製造方法。
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KR101787832B1 (ko) * | 2015-10-22 | 2017-10-19 | 앰코 테크놀로지 코리아 주식회사 | 반도체 패키지 제조 방법 및 이를 이용한 반도체 패키지 |
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JP2020141100A (ja) * | 2019-03-01 | 2020-09-03 | キオクシア株式会社 | 半導体装置およびその製造方法 |
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