JP6738401B2 - ファン−アウト半導体パッケージ - Google Patents
ファン−アウト半導体パッケージ Download PDFInfo
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- JP6738401B2 JP6738401B2 JP2018236620A JP2018236620A JP6738401B2 JP 6738401 B2 JP6738401 B2 JP 6738401B2 JP 2018236620 A JP2018236620 A JP 2018236620A JP 2018236620 A JP2018236620 A JP 2018236620A JP 6738401 B2 JP6738401 B2 JP 6738401B2
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- layer
- wiring
- fan
- semiconductor package
- insulating layer
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Description
図1は電子機器システムの例を概略的に示すブロック図である。
一般に、半導体チップには、数多くの微細電気回路が集積されているが、それ自体が半導体完成品としての役割を果たすことはできず、外部からの物理的又は化学的衝撃により損傷する可能性がある。したがって、半導体チップ自体をそのまま用いるのではなく、半導体チップをパッケージングして、パッケージ状態で電子機器などに用いている。
子機器のメインボードの回路幅が異なるためである。具体的に、半導体チップは、接続パッドのサイズ及び接続パッド間の間隔が非常に微細であるのに対し、電子機器に用いられるメインボードは、部品実装パッドのサイズ及び部品実装パッド間の間隔が半導体チップのスケールよりも著しく大きい。したがって、半導体チップをこのようなメインボード上にそのまま付着することは困難であり、相互間の回路幅の差を緩和することができるパッケージング技術が要求される。
図3a及び図3bはファン−イン半導体パッケージのパッケージング前後を概略的に示す断面図である。
図7はファン−アウト半導体パッケージの概略的な形態を示す断面図である。
体チップの内側に配置させなければならず、そのため、素子のサイズが小さくなると、ボールのサイズ及びピッチを減少させなければならないため、標準化されたボールレイアウトを用いることができない。これに対し、ファン−アウト半導体パッケージは、このように半導体チップ上に形成された連結構造体により、半導体チップの外側までI/O端子を再配線して配置させた形態であるため、半導体チップのサイズが小さくなっても標準化されたボールレイアウトをそのまま用いることができる。したがって、後述のように、上記のような別のインターポーザ基板を用いることなく、電子機器のメインボード上に半導体チップ2120を実装することができる。
半導体チップ120の活性面120b上に配置され、上記半導体チップ120が上記接続パッド122と電気的に連結される再配線層142を含む連結構造体140と、を含む。必要に応じて、フレーム110、配線パターン層132、配線ビア133、パッシベーション層150、表面実装部品190、アンダーバンプメタル160、電気連結構造体170、及びカバー層180などをさらに含むことができる。
とができる。この際、無機フィラーの含有量は、重量パーセントで約60%以上、例えば、70%〜90%程度であってもよい。
ることがより好ましい。
。この場合、封止材130が接続パッド122の下面にブリードすることをある程度防止することができる。その他の必要な位置に絶縁膜(不図示)などがさらに配置されることもできる。半導体チップ120は、ベアダイ(bare die)であってもよく、そのため、接続パッド122が連結構造体140の接続ビア143と物理的に接することができる。但し、半導体チップ120の種類に応じて、半導体チップ120の活性面上に別の再配線層(不図示)がさらに形成されることができ、バンプ(不図示)などが接続パッド122と連結されたパッケージの形を有することもできる。一方、接続パッド122が配置された面が活性面120bとなり、その反対側の面が非活性面120tとなる。
こともできる。電気連結構造体170が半田ボールである場合、電気連結構造体170は、パッシベーション層150の一面上に延びて形成されたアンダーバンプメタル160の側面を覆うことができ、接続信頼性がさらに優れることができる。電気連結構造体170のうち少なくとも一つはファン−アウト(fan−out)領域に配置される。ファン−アウト領域とは、半導体チップ120が配置されている領域を超える領域のことである。ファン−アウト(fan−out)パッケージは、ファン−イン(fan−in)パッケージに比べて優れた信頼性を有し、多数のI/O端子が実現可能であって、3D接続(3D interconnection)が容易である。また、BGA(Ball Grid Array)パッケージ、LGA(Land Grid Array)パッケージなどに比べて、パッケージの厚さを薄く製造することができ、価格競争力に優れる。
1aにレーザービアホールを形成した後、めっき工程により第2配線層112a及び第1配線ビア113aを形成し、一連の過程を繰り返してから、最後に、コアレス基板を取り外して除去する方法で用意することができる。コアレス基板の分離後に、フレーム110の下面に残っている金属層をエッチングして除去することができる。この際、フレーム110の第1絶縁層111aの下面と第1配線層112aの下面の間に段差を形成することができる。次に、レーザー及び/又は機械ドリルなどを用いてフレーム110に貫通孔110Hを形成し、フレーム110の下側にテープ210を付着する。次に、半導体チップ120を貫通孔110H内のテープ210上に付着し、ABFラミネートなどで封止材130を形成する。
性面120tを有する半導体チップ120と、上記半導体チップ120の非活性面120tを覆う封止材130と、上記半導体チップ120の非活性面120t上において上記封止材130の少なくとも一部を貫通し、且つ上記半導体チップ120の非活性面120tと物理的に所定の距離hの分だけ離隔する熱伝導性ビア135と、上記封止材130内に上面が露出するように埋め込まれ、上記熱伝導性ビア135と連結された熱伝導性パターン層134と、上記半導体チップ120の活性面120b上に配置され、上記半導体チップ120が上記接続パッド122と電気的に連結される再配線層142を含む連結構造体140と、を含む。必要に応じて、フレーム110、パッシベーション層150、表面実装部品190、アンダーバンプメタル160、電気連結構造体170などをさらに含むことができる。
せることができる。
の構成及び製造方法についての説明は、図9〜図19bなどを参照して上述した内容と実質的に同一であるため省略する。
Claims (11)
- 接続パッドが配置された活性面、及び前記活性面の反対側である非活性面を有する半導体チップと、
前記半導体チップの非活性面を覆う封止材と、
前記半導体チップの非活性面上において前記封止材の一部内まで延在し、且つ前記半導体チップの非活性面と物理的に離隔する熱伝導性ビアと、
前記封止材内に一面が露出するように埋め込まれ、前記熱伝導性ビアと接続された熱伝導性パターン層と、
前記半導体チップの活性面上に配置され、前記接続パッドと電気的に連結される再配線層を含む連結構造体と、を含み、
前記熱伝導性ビアは前記熱伝導性パターン層を貫通し、
前記熱伝導性ビアの上面は前記熱伝導性パターン層の上面と同一平面にあり、
前記熱伝導性ビアの前記上面の少なくとも一部の領域には導電性表面処理層が配置される、
ファン−アウト半導体パッケージ。 - 前記封止材は、前記半導体チップの非活性面と前記熱伝導性ビアの間の前記物理的に離隔する領域の少なくとも一部を満たす、請求項1に記載のファン−アウト半導体パッケージ。
- 前記半導体チップの非活性面と前記熱伝導性ビアの間の前記物理的に離隔する距離は1μm〜5μmである、請求項1または2に記載のファン−アウト半導体パッケージ。
- 前記熱伝導性ビアは、前記半導体チップの非活性面に近くなるほど断面の幅が狭くなるテーパー形状を有する、請求項1から3のいずれか一項に記載のファン−アウト半導体パッケージ。
- 前記熱伝導性ビアは金属のみからなる層を含む、請求項1から4のいずれか一項に記載のファン−アウト半導体パッケージ。
- 前記封止材上に配置され、前記熱伝導性パターン層の少なくとも一部をオープンさせる開口部を有するカバー層をさらに含む、請求項1に記載のファン−アウト半導体パッケージ。
- 貫通孔を有するフレームをさらに含み、
前記半導体チップは前記貫通孔内に配置され、
前記封止材は前記フレームの少なくとも一部を覆い、
前記封止材は前記貫通孔の少なくとも一部を満たす、請求項1から6のいずれか一項に記載のファン−アウト半導体パッケージ。 - 前記フレームは複数の配線層を含み、
前記複数の配線層は前記接続パッドと電気的に連結され、
前記封止材上に、又は前記封止材内には配線パターン層が配置され、
前記配線パターン層は前記封止材の少なくとも一部を貫通する配線ビアを介して前記複数の配線層のうち最上側の配線層と電気的に連結される、請求項7に記載のファン−アウト半導体パッケージ。 - 前記フレームは、前記連結構造体と接する第1絶縁層と、前記第1絶縁層に埋め込まれ、前記連結構造体と接する第1配線層と、前記第1絶縁層の前記第1配線層が埋め込まれた側の反対側上に配置された第2配線層と、前記第1絶縁層上に配置され、前記第2配線層を覆う第2絶縁層と、前記第2絶縁層上に配置された第3配線層と、を含み、
前記第1配線層から前記第3配線層は前記接続パッドと電気的に連結される、請求項7に記載のファン−アウト半導体パッケージ。 - 前記フレームは、前記第2絶縁層上に配置され、前記第3配線層を覆う第3絶縁層と、前記第3絶縁層上に配置された第4配線層と、をさらに含み、
前記第1配線層から前記第4配線層は前記接続パッドと電気的に連結される、請求項9に記載のファン−アウト半導体パッケージ。 - 前記フレームは、第1絶縁層と、前記第1絶縁層の一面上に配置された第1配線層と、前記第1絶縁層の他面上に配置された第2配線層と、前記第1絶縁層の一面上に配置され、前記第1配線層を覆う第2絶縁層と、前記第2絶縁層上に配置された第3配線層と、前記第1絶縁層の他面上に配置され、前記第2配線層を覆う第3絶縁層と、前記第3絶縁層上に配置された第4配線層と、を含み、
前記第1配線層から前記第4配線層は前記接続パッドと電気的に連結される、請求項7に記載のファン−アウト半導体パッケージ。
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