JP5719999B2 - 電子部品実装方法、電子部品搭載装置および電子部品実装システム - Google Patents
電子部品実装方法、電子部品搭載装置および電子部品実装システム Download PDFInfo
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- JP5719999B2 JP5719999B2 JP2013516214A JP2013516214A JP5719999B2 JP 5719999 B2 JP5719999 B2 JP 5719999B2 JP 2013516214 A JP2013516214 A JP 2013516214A JP 2013516214 A JP2013516214 A JP 2013516214A JP 5719999 B2 JP5719999 B2 JP 5719999B2
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K13/04—Mounting of components, e.g. of leadless components
- H05K13/046—Surface mounting
- H05K13/0465—Surface mounting by soldering
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- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
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- H05K3/341—Surface mounted components
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- H05K3/3436—Leadless components having an array of bottom contacts, e.g. pad grid array or ball grid array components
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Description
前記複数のバンプに対応する複数の第1電極を有する基板を準備する工程と、
前記複数のバンプにフラックスを塗布する工程と、
前記複数のバンプが、前記フラックスを介して、それぞれ対応する前記第1電極に着地するように、前記第1電子部品を前記基板に搭載する工程と、
前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、熱硬化性樹脂を供給する工程と、
前記第1電子部品を搭載した前記基板を加熱して、前記バンプを溶融させるとともに、前記熱硬化性樹脂を硬化させ、放冷することにより、前記第1電子部品を前記基板に接合する工程と、を含む電子部品実装方法に関する。
前記第1電子部品を供給する第1部品供給部と、
前記基板を保持して位置決めする基板保持部と、
フラックスの塗膜を供給する転写ユニットと、
前記供給された第1電子部品を前記基板に搭載する移動可能な搭載ヘッドと、
熱硬化性樹脂を供給する移動可能な塗布ヘッドと、
前記搭載ヘッドと前記塗布ヘッドの移動および動作を制御する制御部と、
を具備し、
前記制御部の指令により、前記搭載ヘッドは、前記転写ユニットで前記第1電子部品の前記複数のバンプに前記フラックスの塗膜を転写させた後、前記複数のバンプが前記フラックスを介してそれぞれ対応する前記第1電極に着地するように、前記第1電子部品を前記基板に搭載し、かつ前記塗布ヘッドは、前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、前記熱硬化性樹脂を供給する、電子部品搭載装置に関する。
前記基板を準備する工程と、
前記基板の前記第2電極にスクリーン印刷により金属粒子を含むペーストを塗布する工程と、
前記第1電子部品を準備する工程と、
前記第2電子部品を準備する工程と、
前記複数のバンプにフラックスを塗布する工程と、
前記複数のバンプが、前記フラックスを介して、それぞれ対応する前記第1電極に着地するように、前記第1電子部品を前記基板に搭載する工程と、
前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、熱硬化性樹脂を供給する工程と、
前記接続用端子が、前記金属粒子を含むペーストを介して、前記第2電極に着地するように、前記第2電子部品を前記基板に搭載する工程と、
前記第1電子部品および前記第2電子部品を搭載した前記基板を加熱して、前記バンプおよび前記金属粒子を溶融させるとともに、前記熱硬化性樹脂を硬化させ、放冷することにより、前記第1電子部品および前記第2電子部品を前記基板に接合する工程と、を含む電子部品実装方法に関する。
前記基板を供給する基板供給装置と、
前記基板供給装置から搬出された前記基板の前記第2電極にスクリーン印刷により金属粒子を含むペーストを塗布するスクリーン印刷装置と、
前記スクリーン印刷装置から搬出された前記基板の前記第1電極に前記第1電子部品を搭載するとともに、前記金属粒子を含むペーストが塗布された第2電極に第2電子部品を搭載する電子部品搭載装置と、
前記電子部品搭載装置から搬出された前記基板を加熱して、前記バンプおよびはんだを溶融させるとともに、前記熱硬化性樹脂を硬化させるリフロー装置と、を具備し、
前記電子部品搭載装置が、
前記第1電子部品を供給する第1部品供給部と、
前記第2電子部品を供給する第2部品供給部と、
前記基板を保持して位置決めする基板保持部と、
フラックスの塗膜を供給する転写ユニットと、
前記供給された第1電子部品および第2電子部品を前記基板に搭載する移動可能な搭載ヘッドと、
熱硬化性樹脂を供給する移動可能な塗布ヘッドと、
前記搭載ヘッドと前記塗布ヘッドの移動および動作を制御する制御部と、
を具備し、
前記制御部の指令により、前記搭載ヘッドは、前記転写ユニットで前記第1電子部品の前記複数のバンプに前記フラックスの塗膜を転写させた後、前記複数のバンプが前記フラックスを介してそれぞれ対応する前記電極に着地するように、前記第1電子部品を前記基板に搭載するとともに、前記接続用端子が、前記金属粒子を含むペーストを介して、前記第2電極に着地するように、前記第2電子部品を前記基板に搭載し、かつ前記塗布ヘッドは、前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、熱硬化性樹脂を供給する、電子部品実装システムに関する。
本発明の新規な特徴を添付の請求の範囲に記述するが、本発明は、構成および内容の両方に関し、本願の他の目的および特徴と併せ、図面を照合した以下の詳細な説明によりさらによく理解されるであろう。
図1Aは、第1電子部品200の一例の正面図であり、図1Bはその底面図である。第1電子部品200は、複数のバンプ204で基板101の電極(ランド)に接続されるボールグリッドアレイ(BGA)型の電子部品である。第1電子部品200は、薄い基板(部品内基板)201と、その上面に実装された半導体素子202と、半導体素子202を被覆する封止樹脂203とを具備する。部品内基板201の下面は、第1電子部品の主面201sを構成しており、主面201sには複数の端子が規則的に行列状に配列され、各々の端子にはバンプ204が設けられている。
本発明の電子部品実装方法は、複数のバンプ204が設けられた主面を有する第1電子部品200を準備する工程と、複数のバンプ204に対応する複数の第1電極を有する基板101を準備する工程と、複数のバンプ204にフラックスを塗布する工程と、複数のバンプ204が、フラックスを介して、それぞれ対応する第1電極に着地するように、第1電子部品200を基板101に搭載する工程と、第1電子部品200が搭載された基板101における第1電子部品200の周縁部に対応する少なくとも1つの補強位置に、周縁部と接触するように、熱硬化性樹脂を供給する工程と、第1電子部品200を搭載した基板101を加熱して、バンプ204を溶融させるとともに、熱硬化性樹脂を硬化させ、放冷することにより、第1電子部品200を基板101に接合する工程とを含む。
基板101には、図2(a)に示すように、第1電子部品200のバンプ204と接続される第1電極102aおよび第2電子部品210の端子211と接続される第2電極102bが設けられている。
電子部品実装システム300は、電子部品を実装するための基板を供給する基板供給装置301と、基板供給装置301から搬出された基板の所定の電極(第2電極102b)に、スクリーン印刷により金属粒子を含むペーストを塗布するスクリーン印刷装置302と、スクリーン印刷装置302から搬出された基板の、前記所定の電極とは異なる電極(第1電極102a)に、第1電子部品を搭載するとともに、金属粒子を含むペーストが塗布された電極に第2電子部品を搭載する電子部品搭載装置303と、電子部品搭載装置303から搬出された基板を加熱して、第1電子部品および第2電子部品を基板に接合するリフロー装置304と、を具備する。リフロー装置304から搬出された基板、すなわち実装構造体は、基板回収装置305により回収される。
図11Aは、矩形の第1電子部品200の周縁部201xの四隅に対応させて4箇所の補強位置に補強用樹脂105を塗布したときの、第1電子部品200の平面図を示す。図11Bは、同じ第1電子部品200の底面図(複数のバンプを有する主面201s)である。補強用樹脂105は、第1電子部品200の周縁部201xの近傍のバンプ204の一部、および、図示しないが周縁部201xに最も近い第1電極102aの一部とだけ接触するように補強位置に塗布されている。ただし、補強用樹脂105の塗布パターンは、特に限定されない。
フラックスは、はんだ接合の際に、第1電極の表面およびバンプの表面に存在する酸化物などを除去したり、はんだの表面張力を低減したりする作用を有する材料であればよい。これらの作用(以下、活性作用)により、はんだと第1電極との濡れ性が大きくなり、信頼性の高い良好なはんだ接合が可能となる。
補強用樹脂には、熱硬化性樹脂が用いられる。熱硬化性樹脂としては、エポキシ樹脂、フェノール樹脂、メラミン樹脂、ウレタン樹脂などを例示できる。熱硬化性樹脂は、硬化剤、硬化促進剤などを含んでもよい。硬化剤としては、酸無水物、脂肪族または芳香族アミン、イミダゾールまたはその誘導体などが好ましく用いられ、硬化促進剤としては、ジシアンジアミドなどを例示できる。
《実施例1》
まず、FR4基板に、第1電極として所定パターンのランドを形成した。転写テーブルにスキージを用いてフラックスの塗膜を形成し、その塗膜を第1電子部品であるフリップチップBGAパッケージ(1005チップ)のSn−Ag−Cu系のはんだで構成されたバンプ(融点約220℃)に転写した。その後、バンプがランドに着地するように電子部品を基板に搭載した。次に、電子部品の周縁部の四隅およびその近傍を含むように、2箇所の補強位置に補強用樹脂をU型の塗布パターン(図12(e))で塗布した。その際、補強用樹脂を電子部品の周縁部に接触させるとともに、基板のランドおよび電子部品のバンプにも接触させた。その後、電子部品を搭載した基板をリフロー装置で240℃〜250℃で加熱してはんだ接合を行った。
電子部品を搭載する前の基板における、電子部品の周縁部に対応する補強位置に、実施例1と同じ塗布パターンで補強用樹脂を塗布した。その際、補強用樹脂は基板のランドの縁に接触した。次に、実施例1と同様のフラックスの塗膜がバンプに転写された電子部品を、バンプがランドに着地するように基板に搭載した。その際、補強用樹脂は、電子部品の周縁部に接触するとともに、電子部品のバンプにも接触していた。その後、電子部品を搭載した基板を実施例1と同じリフロー装置で加熱してはんだ接合を行った。
本発明を現時点での好ましい実施態様に関して説明したが、そのような開示を限定的に解釈してはならない。種々の変形および改変は、上記開示を読むことによって本発明に属する技術分野における当業者には間違いなく明らかになるであろう。したがって、添付の請求の範囲は、本発明の真の精神および範囲から逸脱することなく、すべての変形および改変を包含する、と解釈されるべきものである。
Claims (10)
- 複数のバンプが設けられた矩形の主面を有する第1電子部品を準備する工程と、
前記複数のバンプに対応する複数の第1電極を有する基板を準備する工程と、
前記複数のバンプにフラックスを塗布する工程と、
前記複数のバンプが、前記フラックスを介して、それぞれ対応する前記第1電極に着地するように、前記第1電子部品を前記基板に搭載する工程と、
前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、熱硬化性樹脂を供給する工程と、
前記第1電子部品を搭載した前記基板を加熱して、前記バンプを溶融させるとともに、前記熱硬化性樹脂を硬化させ、放冷することにより、前記第1電子部品を前記基板に接合する工程と、を含む電子部品実装方法。 - 前記熱硬化性樹脂が、前記第1電極または前記バンプの表面に存在する酸化物を除去する作用を有する成分を含む、請求項1に記載の電子部品実装方法。
- 前記フラックスは、熱硬化性フラックスである、請求項1または2に記載の電子部品実装方法。
- 前記熱硬化性樹脂を供給する工程を、前記基板に搭載された前記電子部品を前記基板に対して押圧しながら行う、請求項1〜3のいずれか1項に記載の電子部品実装方法。
- さらに、接続用端子を有する第2電子部品を準備する工程と、
前記第1電子部品を前記基板に搭載する前に、前記基板に設けられた前記接続用端子に対応する第2電極に、スクリーン印刷により、金属粒子を含むペーストを塗布する工程と、
前記接続用端子が、前記金属粒子を含むペーストを介して、前記第2電極に着地するように、前記第2電子部品を前記基板に搭載する工程と、を含む、請求項1〜4のいずれか1項に記載の電子部品実装方法。 - 複数のバンプが設けられた矩形の主面を有する第1電子部品を、前記複数のバンプに対応する複数の第1電極を有する基板に搭載する、電子部品搭載装置であって、
前記第1電子部品を供給する第1部品供給部と、
前記基板を保持して位置決めする基板保持部と、
フラックスの塗膜を供給する転写ユニットと、
前記供給された第1電子部品を前記基板に搭載する移動可能な搭載ヘッドと、
熱硬化性樹脂を供給する移動可能な塗布ヘッドと、
前記搭載ヘッドと前記塗布ヘッドの移動および動作を制御する制御部と、
を具備し、
前記制御部の指令により、前記搭載ヘッドは、前記転写ユニットで前記第1電子部品の前記複数のバンプに前記フラックスの塗膜を転写させた後、前記複数のバンプが前記フラックスを介してそれぞれ対応する前記第1電極に着地するように、前記第1電子部品を前記基板に搭載し、かつ前記塗布ヘッドは、前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、前記熱硬化性樹脂を供給する、電子部品搭載装置。 - 前記塗布ヘッドは、前記熱硬化性樹脂を供給する際に、前記基板に搭載された前記電子部品を前記基板に対して押圧する押圧端子を具備する、請求項6記載の電子部品搭載装置。
- さらに、接続用端子を有する第2電子部品を供給する第2部品供給部を具備し、
前記制御部の指令により、前記搭載ヘッドは、前記基板に設けられた前記接続用端子に対応する第2電極に着地するように、前記第2電子部品を前記基板に搭載する、請求項6または7記載の電子部品搭載装置。 - 複数のバンプが設けられた矩形の主面を有する第1電子部品および接続用端子を有する第2電子部品を、前記複数のバンプに対応する複数の第1電極および前記接続用端子に対応する第2電極を有する基板に実装する電子部品実装方法であって、
前記基板を準備する工程と、
前記基板の前記第2電極にスクリーン印刷により金属粒子を含むペーストを塗布する工程と、
前記第1電子部品を準備する工程と、
前記第2電子部品を準備する工程と、
前記複数のバンプにフラックスを塗布する工程と、
前記複数のバンプが、前記フラックスを介して、それぞれ対応する前記第1電極に着地するように、前記第1電子部品を前記基板に搭載する工程と、
前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、熱硬化性樹脂を供給する工程と、
前記接続用端子が、前記金属粒子を含むペーストを介して、前記第2電極に着地するように、前記第2電子部品を前記基板に搭載する工程と、
前記第1電子部品および前記第2電子部品を搭載した前記基板を加熱して、前記バンプおよび前記金属粒子を溶融させるとともに、前記熱硬化性樹脂を硬化させ、放冷することにより、前記第1電子部品および前記第2電子部品を前記基板に接合する工程と、を含む電子部品実装方法。 - 複数のバンプが設けられた矩形の主面を有する第1電子部品および接続用端子を有する第2電子部品を、前記複数のバンプに対応する複数の第1電極および前記接続用端子に対応する第2電極を有する基板に実装する電子部品実装システムであって、
前記基板を供給する基板供給装置と、
前記基板供給装置から搬出された前記基板の前記第2電極にスクリーン印刷により金属粒子を含むペーストを塗布するスクリーン印刷装置と、
前記スクリーン印刷装置から搬出された前記基板の前記第1電極に前記第1電子部品を搭載するとともに、前記金属粒子を含むペーストが塗布された第2電極に第2電子部品を搭載する電子部品搭載装置と、
前記電子部品搭載装置から搬出された前記基板を加熱して、前記バンプおよびはんだを溶融させるとともに、前記熱硬化性樹脂を硬化させるリフロー装置と、を具備し、
前記電子部品搭載装置が、
前記第1電子部品を供給する第1部品供給部と、
前記第2電子部品を供給する第2部品供給部と、
前記基板を保持して位置決めする基板保持部と、
フラックスの塗膜を供給する転写ユニットと、
前記供給された第1電子部品および第2電子部品を前記基板に搭載する移動可能な搭載ヘッドと、
熱硬化性樹脂を供給する移動可能な塗布ヘッドと、
前記搭載ヘッドと前記塗布ヘッドの移動および動作を制御する制御部と、
を具備し、
前記制御部の指令により、前記搭載ヘッドは、前記転写ユニットで前記第1電子部品の前記複数のバンプに前記フラックスの塗膜を転写させた後、前記複数のバンプが前記フラックスを介してそれぞれ対応する前記電極に着地するように、前記第1電子部品を前記基板に搭載するとともに、前記接続用端子が、前記金属粒子を含むペーストを介して、前記第2電極に着地するように、前記第2電子部品を前記基板に搭載し、かつ前記塗布ヘッドは、前記第1電子部品が搭載された基板における前記第1電子部品の少なくとも四隅またはその近傍に対応する複数の補強位置に、前記第1電子部品の周縁部並びに前記周縁部に位置する最外周のバンプと接触し、かつ、前記最外周のバンプを覆わないように、熱硬化性樹脂を供給する、電子部品実装システム。
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