JP2004519860A - 低ループ高の接着配線接続部を備えるチップモジュール - Google Patents
低ループ高の接着配線接続部を備えるチップモジュール Download PDFInfo
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- JP2004519860A JP2004519860A JP2002576011A JP2002576011A JP2004519860A JP 2004519860 A JP2004519860 A JP 2004519860A JP 2002576011 A JP2002576011 A JP 2002576011A JP 2002576011 A JP2002576011 A JP 2002576011A JP 2004519860 A JP2004519860 A JP 2004519860A
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Abstract
Description
【発明の属する技術分野】
本発明は、チップモジュール及びチップモジュールを備えるデータ担体に関する。かかるチップモジュールは、支持手段接続層を備える支持手段とチップ接続層を備えるチップとを有するものであり、これら接続層は、接着ワイヤにより互いに接続され、各チップ接続層には、接着ワイヤの楔形に接着される端部が接続される配線接続手段が設けられるものである。
【0002】
【従来の技術】
上述したようなチップモジュールは、特許文献の欧州特許出願公開第EP0397426A2号公報に描かれかつ説明されている。この既知のチップモジュールにおいては、接着ワイヤの球状に接着された端部が配線接続手段として各チップ接続層上に設けられており、これはよく技術的言葉として「ネイルボンド」と呼ばれている。かかる「ネイルボンド」のなされたチップ接続層の平面図において、当該「ネイルボンド」はその下に延びているチップ接続層よりも寸法が小さい。さらに、その下に延びているチップ接続層に垂直な方向において当該「ネイルボンド」は比較的に大きな寸法すなわち比較的に大なる高さを有している。このような「ネイルボンド」の小さい領域は、接着ワイヤの楔形に接着された端部を「ネイルボンド」に接着するボンディング処理において、当該接続を確実になすためにその接着ワイヤを非常に正確に当該「ネイルボンド」に送らなければならない、という問題が伴う。残念ながら、かかる「ネイルボンド」の大なる高さは、例えば、特許文献の上記第EP0397426A2号公報に記述されているようにプラスチックスリーブの中にチップモジュールを埋め込むことにより形成可能な、当該チップモジュールを含むデータ担体の、或いは当該チップモジュールの全体の高さに好ましくない影響を及ぼす。このような「ネイルボンド」の組み立ては、その「ネイルボンド」がワイヤボンデリング法の仕様で形成されなければならないので、ワイヤボンデリング法の比較的長い期間を必要とする。
【0003】
【発明が解決しようとする課題】
本発明の目的は、上述した欠点を回避し、チップモジュールを改良し、そうしたチップモジュールを備える改良されたデータ担体を実現することである。
【0004】
【課題を解決するための手段】
上記目的を達成するため、発明の特徴は、本発明によりチップモジュールに施され、本発明によるチップモジュールは、次のように特徴づけられる。すなわち、支持手段及びこの支持手段に接続されたチップを備えるチップモジュールであって、前記チップは、少なくとも1つのチップ接続層を有し、前記支持手段は、少なくとも1つの支持手段接続層を有し、関連づけられる配線接続手段は、前記チップ接続層上に設けられ、前記配線接続手段及び前記支持手段接続層は、接着ワイヤにより互いに接続され、前記接着ワイヤは、第1の接着端部と楔形に接着された第2の接着端部とを有し、前記第1の接着端部は、前記支持手段接続層に接続され、楔形に接着された前記第2の端部は、前記配線接続手段に接続され、前記チップ接続層と平行に延びる平坦金属層は、前記配線接続手段として設けられている、チップモジュールである。
【0005】
上記目的を達成するため、発明の特徴は、本発明によりデータ担体に施され、本発明によるデータ担体は、次のように特徴づけられる。すなわち、支持手段及びこの支持手段に接続されたチップを備えるチップモジュールであって、前記チップは、少なくとも1つのチップ接続層を有し、前記支持手段は、少なくとも1つの支持手段接続層を有し、関連づけられる配線接続手段は、前記チップ接続層上に設けられ、前記配線接続手段及び前記支持手段接続層は、接着ワイヤにより互いに接続され、前記接着ワイヤは、第1の接着端部と楔形に接着された第2の接着端部とを有し、前記第1の接着端部は、前記支持手段接続層に接続され、楔形に接着された前記第2の端部は、前記配線接続手段に接続され、前記チップ接続層と平行に延びる平坦金属層は、前記配線接続手段として設けられている、チップモジュール、を備えるデータ担体である。
【0006】
本発明によるこれら特徴を備えることによって、当該接着ワイヤの楔形形状に接着されるべき端部と配線接続手段との間に組み立てられるべき楔形接着(ボンド)は、当該配線接続手段として設けられる金属層へ当該接着ワイヤを送ることについて上述した既知の方策の場合よりも遥かに精度を落とした形で作ることが可能である。さらに、本発明により採用されるステップの結果として、各配線接続手段は、上述した既知の従来技術の場合よりも、配線接続手段の下に延在するチップ接続層に垂直な方向において遥かに少ないスペースで済む。本発明によるチップモジュールにおいては、また本発明によるデータ担体においては、さらに次のような効果がある。すなわち、各配線接続手段は、ワイヤボンディング法に依存しない方法によって組み立てることができ、当該ワイヤボンディング法の前に行われるものであり、これにより、上述した既知のチップモジュールの組み立ての場合よりも相当に短い時間でワイヤボンディング法を行うことができ、この結果、チップモジュールの製造におけるいわゆるスループットすなわち工程期間を当該既知の方法に比べて本発明により十分に短くすることができるのである。
【0007】
本発明によるチップモジュールにおいて、また本発明によるデータ担体において、チップ接続層上に設けられる金属層は、チップ接続層の適当に寸法合わせされた領域が与えられ、チップ接続層の一部だけをカバーし、このようにするにもかかわらず、楔形に接着されるべき端部を当該配線接続手段として設けられた金属層に送る際に複雑さを伴わないことを確実にする十分大なる領域(面積)をとることになる。但し、請求項2又は請求項5による特徴が追加されたときには、特に有利なものとなることが分かった。したがって、とりうる最も大なる領域(面積)は、当該チップ接続層全体に対する保護機能をも付加的になす金属層について効果的に実現される。
【0008】
本発明によるチップモジュールにおいて、また本発明によるデータ担体において、当該配線接続手段として設けられる各金属層は、銀又は鈴からなるものとすることができる。但し、当該配線接続手段として設けられる各金属層を金からなるものとすると、特に有効であることが分かった。
【0009】
上記態様その他の本発明は、以下に記述する代表的実施例から見い出され、これら代表的実施例に基づいて説明される。
【0010】
【発明の実施の形態】
本発明は、図面に描かれた2つの代表的実施例により以下にさらに詳述されるが、これらに本発明が限定されるものではない。
【0011】
図1にはデータ担体1が描かれている。データ担体1は、プラスチックインジェクション成形(モールディング)処理を用いて製造されたデータ担体ボディ2を有する。但し、他の知られた方法、例えばいわゆる(積層)ラミネーション処理によりカード状ボディ2を製造することもできる。
【0012】
データ担体1に収納されるのは、部分的にしか図示されていないデータ担体1のようなチップモジュール3である。チップモジュール3は、チップモジュール3のチップ5のための保持又は支持(ホルダ)手段を形成する支持(サポート)プレート4を有する。チップ5は、具体的には粘着層6により、支持プレート4に結合される。その粘着層6から逸れた側7において、チップ5は2つのチップ接続層8を有するが、図1にはそのうちの一方のチップ接続層8だけが示されている。なお、かかるチップ5は、一般に知られているように3つ以上のチップ接続層を有するものとすることができる。チップモジュール3の場合においては、2つのチップ接続層8を有するチップ5から類推して、支持プレート4は2つの支持プレート接続層9を有し、そのうちの一方の支持手段接続層9のみが図1に描かれている。本例においては、これは必ずしも必須ではないが、支持手段接続層9は、導電体トラックにより実現される伝達コイルの構成要素であり、データ担体1の構成要素であり、適切な通信ステーションを具備したデータ担体1の非接触通信のために設けられている。支持手段接続層9は、いわゆる導電体フレームの断面によっても形成可能でもあり、支持手段接続層9と当該導電体フレームの残りの部分は、1片又は1つの材料、特に金属からなるものとしている。
【0013】
関連付けられる配線(ワイヤ)接続手段10は、当該2つのチップ接続層8の各々の上に設けられ、図1によるようにチップモジュール3において特に有効な方法により、関連のチップ接続層8に平行に延び金により効果的に形成される平坦金属層10によって形成される。2つの配線接続手段10の各々、すなわち2つの金属層10の各々は、ボンディング(接着)ワイヤ11により支持プレート接続層9に接続される。
【0014】
各ボンディングワイヤ11は、本例では球状に接着された第1の端部12と楔形の形態で接着された第2の端部13とを有する。球状に接着された各第1端部12は、支持プレート接続層9に接続され、楔形形態に接着された各第2端部13は、配線接続手段10すなわち平坦金属層10に接続される。図1による構成においては、各金属層10は、その下に延在するチップ接続層8の一部のみ被覆する。
【0015】
図2に描かれているデータ担体1の場合、各金属層10は、その下に延びるチップ接続層8を全体的にカバーする。これにより、可能な限り金属層10を大きくするという利点の他にも、金属層10がチップ接続層8を効果的に保護するという利点もある。図2によるデータ担体1の改変バージョンにおいては、チップ接続層8の領域を、その上に延びる金属層10よりも小さくすることができる。これにより、可及的に小さな接続層8で足りるという効果を奏する。また、これにより、できる限り小さなチップ表面による実現形態について効果的となる。チップ接続層8の小さな領域にもかかわらず、チップ接続層8に比べて大きな領域を持つ金属層10により、ボンディングワイヤ11との良好な電気的接続が確実となる。
【0016】
図1及び図2による2つのデータ担体1においては、配線接続手段10が非常に低い全体の高さを持って構成され、大きな表面領域を有することが効果的に達成される。これにより、出来る限り全体の高さの小さいデータ担体1及び/又はチップモジュール3を実現することについて、また金属層10の領域において出来る限り複雑さの伴わないように接着することを達成することについて効果的なものとなる。
【0017】
当業者の間では、上述したようなチップ接続層8はよく「パッド」とも呼ばれ、上述したような金属層10はよく「直線状壁バンプ」(straight wall bump)又は「直線状壁金バンプ」(straight wall gold bump)とも呼ばれる。実際上は、かかるパッドは概ね1.0μmの厚さを有し、当該直線状壁バンプは、ボンディングワイヤの球状に結合される端部に比し10.0μmないし18.0μmの範囲の厚さを有し、その球状に結合された端部は、少なくとも30.0μmの厚さすなわち高さを有する。これは、本発明による構成により、少なくとも12.0μmだけ全体の高さの効果的な縮減が達成されることを意味する。
【図面の簡単な説明】
【図1】本発明の第1の代表的実施例によるデータ担体の概略断面図。
【図2】図1と同様にして本発明の第2の代表的実施例によるデータ担体を示す図。
Claims (6)
- 支持手段及びこの支持手段に接続されたチップを備えるチップモジュールであって、
前記チップは、少なくとも1つのチップ接続層を有し、前記支持手段は、少なくとも1つの支持手段接続層を有し、関連づけられる配線接続手段は、前記チップ接続層上に設けられ、前記配線接続手段及び前記支持手段接続層は、接着ワイヤにより互いに接続され、前記接着ワイヤは、第1の接着端部と楔形に接着された第2の接着端部とを有し、前記第1の接着端部は、前記支持手段接続層に接続され、楔形に接着された前記第2の端部は、前記配線接続手段に接続され、前記チップ接続層と平行に延びる平坦金属層は、前記配線接続手段として設けられている、チップモジュール。 - 請求項1に記載のチップモジュールであって、前記チップ接続層上に設けられる前記平坦金属層は、前記チップ接続層を全体的に被覆する、チップモジュール。
- 請求項1に記載のチップモジュールであって、前記平坦金属層は金からなる、チップモジュール。
- 支持手段及びこの支持手段に接続されたチップを備えるチップモジュールであって、前記チップは、少なくとも1つのチップ接続層を有し、前記支持手段は、少なくとも1つの支持手段接続層を有し、関連づけられる配線接続手段は、前記チップ接続層上に設けられ、前記配線接続手段及び前記支持手段接続層は、接着ワイヤにより互いに接続され、前記接着ワイヤは、第1の接着端部と楔形に接着された第2の接着端部とを有し、前記第1の接着端部は、前記支持手段接続層に接続され、楔形に接着された前記第2の端部は、前記配線接続手段に接続され、前記チップ接続層と平行に延びる平坦金属層は、前記配線接続手段として設けられている、チップモジュール、を備えるデータ担体。
- 請求項4に記載のデータ担体であって、前記チップ接続層上に設けられる前記平坦金属層は、前記チップ接続層を全体的に被覆する、データ担体。
- 請求項4に記載のデータ担体であって、前記平坦金属層は金からなる、データ担体。
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EP01890093 | 2001-03-23 | ||
PCT/IB2002/000486 WO2002078080A1 (en) | 2001-03-23 | 2002-02-18 | Chip module with bond-wire connections with small loop height |
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GB2307103B (en) * | 1993-06-25 | 1997-09-17 | Mitsubishi Electric Corp | Electrode connections for semiconductor devices |
KR980005922A (ko) * | 1995-06-28 | 1998-03-30 | 윌리엄 이. 힐러 | 낮은 루프 와이어 본딩 |
US5874354A (en) * | 1995-09-26 | 1999-02-23 | Siemens Aktiengesellschaft | Method for electrically connecting a semiconductor chip to at least one contact surface and smart card module and smart card produced by the method |
WO1998021780A2 (de) * | 1996-11-11 | 1998-05-22 | Siemens Aktiengesellschaft | Verbindung zwischen zwei kontaktflächen und verfahren zum herstellen einer solchen verbindung |
DE19703639A1 (de) * | 1997-01-31 | 1998-08-06 | Bosch Gmbh Robert | Verfahren zur Herstellung von Bonddrahtverbindungen |
JPH1167809A (ja) * | 1997-08-26 | 1999-03-09 | Sanyo Electric Co Ltd | 半導体装置 |
JP2000228422A (ja) * | 1999-02-05 | 2000-08-15 | Seiko Epson Corp | 半導体装置及びその製造方法 |
-
2002
- 2002-02-18 JP JP2002576011A patent/JP2004519860A/ja active Pending
- 2002-02-18 EP EP02712153A patent/EP1374298A1/en not_active Withdrawn
- 2002-02-18 WO PCT/IB2002/000486 patent/WO2002078080A1/en active Application Filing
- 2002-02-18 CN CNB02800812XA patent/CN100401488C/zh not_active Expired - Lifetime
- 2002-03-15 US US10/099,682 patent/US6593664B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US20020135078A1 (en) | 2002-09-26 |
CN100401488C (zh) | 2008-07-09 |
CN1460291A (zh) | 2003-12-03 |
US6593664B2 (en) | 2003-07-15 |
EP1374298A1 (en) | 2004-01-02 |
WO2002078080A1 (en) | 2002-10-03 |
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