JP2007506284A - 導電性バンプの構造およびその製作方法 - Google Patents
導電性バンプの構造およびその製作方法 Download PDFInfo
- Publication number
- JP2007506284A JP2007506284A JP2006527074A JP2006527074A JP2007506284A JP 2007506284 A JP2007506284 A JP 2007506284A JP 2006527074 A JP2006527074 A JP 2006527074A JP 2006527074 A JP2006527074 A JP 2006527074A JP 2007506284 A JP2007506284 A JP 2007506284A
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- Prior art keywords
- layer
- diffusion barrier
- metal
- bump
- electroless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Abstract
Description
Claims (33)
- 半導体基板と、
該半導体基板と接する第1の導電層であって、Cuを含むベース層金属を含む第1の導電層と、
該第1の導電層と接する拡散バリアと、
該拡散バリア上のウェッティング層と、
該ウェッティング層上の、Snを含むバンプ層であって、電気メッキで形成されたバンプ層と、
を有する装置であって、
拡散バリアは、CuおよびSnが拡散バリアを通って拡散することを抑制するように適合されている、装置。 - 拡散バリアは、無電解拡散バリアであることを特徴とする請求項1に記載の装置。
- さらに、バンプ層とダイパッケージの間に設置されたハンダ層を有し、ハンダ層は、Snを含むことを特徴とする請求項1に記載の装置。
- ベース層金属は、接着層とシード層とを有し、接着層は、Ti、TiNおよびTiSiNのいずれかを含み、シード層は、Ni、NiVおよびCoのいずれかを含むことを特徴とする請求項1に記載の装置。
- ベース層金属は、さらに接着層とシード層の間に設置された金属層を有し、該金属層は、Alを含むことを特徴とする請求項4に記載の装置。
- 拡散バリアは、CoBP、CoWP、CoWB、CoWBP、NiBP、NiWP、NiWBおよびNiWBPのいずれか一つを含み、バンプ層は、さらにSn合金を含み、該Sn合金は、0.7Cu、Bi、Sbおよび3.5Agのいずれかを含み、電気メッキで設置されたSnバンプ層は、さらにαSnからβSnへの低温相変態が抑制されるように適合されていることを特徴とする請求項1に記載の装置。
- ウェッティング層は、CoB、NiB、NiPを含み、拡散バリアは、さらにバンプ層の剥離を抑制するように適合されていることを特徴とする請求項1に記載の装置。
- さらに当該装置は、スパッタリングされたベース層金属を有し、拡散バリアは、さらにCuSn合金の形成に関係する電気泳動を抑制するように適合されていることを特徴とする請求項1に記載の装置。
- 半導体基板上の、Cuを含むベース層金属と、
該ベース層金属上の、電気メッキされたCu層を含むバンプ層と、
該バンプ層と接する拡散バリアと、
該拡散バリア上のウェッティング層と、
前記バンプ層と接する、Snを含むハンダ層と、
を有する装置であって、
拡散バリアは、さらにCuおよびSnが拡散バリアを通って拡散することを抑制するように適合されている、装置。 - 拡散バリアは、無電解拡散バリア層を有することを特徴とする請求項9に記載の装置。
- ベース層金属は、接着層とシード層とを有し、接着層は、Ti、TiNおよびTiSiNのいずれかを含み、シード層は、Ni、NiVおよびCoのいずれかを含むことを特徴とする請求項9に記載の装置。
- ベース層金属は、さらに接着層とシード層の間に設置された金属層を有し、該金属層は、Alを含み、拡散バリアは、バンプ層内でのウィスカーの形成を抑制するように適合されていることを特徴とする請求項10に記載の装置。
- ベース層金属は、さらに拡散バリアと接しており、バンプ層の全ての表面は、ハンダ層から物理的に分離されていることを特徴とする請求項12に記載の装置。
- 拡散バリアは、CoBP、CoWP、CoWB、CoWBP、NiBP、NiWP、NiWBおよびNiWBPのいずれか一つを含み、ウェッティング層は、CoB、NiBおよびNiPのいずれかを含むことを特徴とする請求項9に記載の装置。
- SiNおよびポリイミドでパッシベーションを行うステップと、
ベース層金属を成膜するステップと、
フォトレジスト層を成膜するステップと、
拡散バリアを形成するステップであって、前記拡散バリアは、異なる層間でのCuおよびSnの相互混合を抑制するように適合されている、ステップと、
拡散バリアの上部にウェッティング層を形成するステップと、
バンプ層を形成するステップと、
フォトレジスト層を除去するステップと、
ベース層金属をエッチングするステップと、
を有する方法。 - 前記ベース層金属を成膜するステップは、プラズマ気相成膜法(PVD)、化学気相成膜法(CVD)および原子層成膜法(ALD)のいずれかで行われ、拡散バリアは、無電解拡散バリアを含むことを特徴とする請求項15に記載の方法。
- ベース層金属は、接着層とシード層とを有し、接着層は、Ti、TiNおよびTiSiNのいずれかを含み、シード層は、Ni、NiVおよびCoのいずれかを含み、無電解拡散バリアは、さらにバンプ層の剥離を抑制するように適合されていることを特徴とする請求項16に記載の方法。
- 前記ベース層金属を成膜するステップは、接着層とシード層の間に金属層を成膜するステップを有し、ベース層金属は、さらに1または2以上の電気的相互接続部を有することを特徴とする請求項17に記載の方法。
- 金属層は、Alを含み、フォトレジスト層は、パターン形成に適合され、無電解拡散バリアは、さらにCuSn合金の形成に関係する電気泳動を抑制するように適合されていることを特徴とする請求項18に記載の方法。
- 無電解拡散バリアは、CoBP、CoWP、CoWB、CoWBP、NiBP、NiWP、NiWBおよびNiWBPのいずれか一つを含むことを特徴とする請求項16に記載の方法。
- バンプ層は、電気メッキされたSnを含み、αSnからβSnへの低温相変態が抑制され、電気メッキされたSnは、さらにウィスカーの形成を抑制するように適合されていることを特徴とする請求項16に記載の方法。
- バンプ層は、Sn合金を含み、Sn合金は、0.7Cu、Bi、Sbおよび3.5Agのいずれかを含み、Sn合金は、電気メッキで設置され、αSnからβSnへのSnの低温相変態が抑制されることを特徴とする請求項16に記載の方法。
- さらに、
バンプ層と接する、Snを含むハンダ層を形成するステップと、
ダイパッケージをハンダ層に接続するステップと、
を有することを特徴とする請求項16に記載の方法。 - SiNおよびポリイミドでパッシベーションを行うステップと、
ベース層金属を成膜するステップと、
フォトレジスト層を成膜するステップと、
電気メッキによりCu層を形成するステップと、
Cu層とSn層の間に、無電解拡散バリアを形成するステップであって、無電解拡散バリアは、CuおよびSnが無電解拡散バリアを通って拡散することを抑制するように適合された、ステップと、
無電解拡散バリア上にウェッティング層を形成するステップと、
フォトレジスト層を除去するステップと、
ベース層金属をエッチングするステップと、
を有する方法。 - さらに、ウェッティング層および無電解拡散バリアの上部に、ハンダ領域を形成するステップを有し、ハンダ領域は、ダイパッケージと接し、ハンダ領域は、Snを含むことを特徴とする請求項24に記載の方法。
- Sn層は、無電解拡散バリアの上部にハンダ領域を有し、ハンダ領域は、ダイパッケージと接していることを特徴とする請求項24に記載の方法。
- 無電解拡散バリアは、CoBP、CoWP、CoWB、CoWBP、NiBP、NiWP、NiWBおよびNiWBPのいずれか一つを含むことを特徴とする請求項24に記載の方法。
- SiNおよびポリイミドでパッシベーションを行うステップと、
ベース層金属を成膜するステップと、
フォトレジスト層を成膜するステップと、
Cuを含むバンプ層を電気メッキによって形成するステップと、
フォトレジスト層を除去するステップと、
ベース層金属をエッチングするステップと、
Cuバンプ層とSn層の間に、無電解拡散バリア層を形成するステップであって、無電解拡散バリア層は、拡散層の間でのCuおよびSnの相互混合を抑制するように適合された、ステップと、
無電解拡散バリア層上にウェッティング層を形成するステップと、
を有する方法。 - 無電解拡散バリア層は、CoBP、CoWP、CoWB、CoWBP、NiBP、NiWP、NiWBおよびNiWBPのいずれか一つを含み、ベース層金属は、接着層とシード層とを有し、接着層は、Ti、TiNおよびTiSiNのいずれかを含み、シード層は、Ni、NiVおよびCoのいずれかを含むことを特徴とする請求項28に記載の方法。
- ベース層金属は、さらに無電解拡散バリア層と物理的に接し、バンプ層は、外表面を有し、バンプ層の外表面は、Snを含む層から物理的に離れていることを特徴とする請求項28に記載の方法。
- Cuバンプ層は、さらにウィスカーの形成を抑制するように適合されており、無電解拡散バリア層は、さらにCuSn合金の形成に関係する電気泳動を抑制するように適合されていることを特徴とする請求項28に記載の方法。
- 回路基板を有するシステムであって、
回路を有する1または2以上の部品、および
回路基板上の1または2以上の層であって、回路基板上の部品間に、少なくとも一つの信号を伝送する層、
を有し、
回路基板上の少なくとも一つの部品は、ダイパッケージ相互接続部を有し、該相互接続部は、
半導体基板と、
該半導体基板と接する第1の導電層であって、Cuを含むベース層金属を有する第1の導電層と、
該第1の導電層と接する拡散バリアと、
該拡散バリア上のウェッティング層と、
該ウェッティング層上の、Snを含むバンプ層であって、電気メッキで形成されたバンプ層と、
を有し、
拡散バリアは、CuおよびSnが拡散バリアを通って拡散することを抑制するように適合されている、システム。 - 1または2以上の部品は、中央演算処理ユニット、メモリおよびロジックユニットのいずれかを有することを特徴とする請求項32に記載のシステム。
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TW200520192A (en) | 2005-06-16 |
US7276801B2 (en) | 2007-10-02 |
US10249588B2 (en) | 2019-04-02 |
WO2005031848A1 (en) | 2005-04-07 |
US20080213996A1 (en) | 2008-09-04 |
JP5284314B2 (ja) | 2013-09-11 |
US8580679B2 (en) | 2013-11-12 |
JP2013138260A (ja) | 2013-07-11 |
JP4629042B2 (ja) | 2011-02-09 |
US9543261B2 (en) | 2017-01-10 |
JP2015167257A (ja) | 2015-09-24 |
HK1093380A1 (en) | 2007-03-02 |
CN100492607C (zh) | 2009-05-27 |
JP6078585B2 (ja) | 2017-02-08 |
US20110084387A1 (en) | 2011-04-14 |
US20170084564A1 (en) | 2017-03-23 |
US20190198472A1 (en) | 2019-06-27 |
US20050062169A1 (en) | 2005-03-24 |
TWI251921B (en) | 2006-03-21 |
JP2010267996A (ja) | 2010-11-25 |
CN1853263A (zh) | 2006-10-25 |
US20220059484A1 (en) | 2022-02-24 |
US11201129B2 (en) | 2021-12-14 |
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