JP3956955B2 - 半導体基板の製造方法、電気光学装置の製造方法 - Google Patents
半導体基板の製造方法、電気光学装置の製造方法 Download PDFInfo
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- JP3956955B2 JP3956955B2 JP2004126965A JP2004126965A JP3956955B2 JP 3956955 B2 JP3956955 B2 JP 3956955B2 JP 2004126965 A JP2004126965 A JP 2004126965A JP 2004126965 A JP2004126965 A JP 2004126965A JP 3956955 B2 JP3956955 B2 JP 3956955B2
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Description
半導体基板3は、配線基板10と、配線基板10に形成された所定形状の配線パターン11と、配線パターン11に接続された回路部12と、有機EL素子124を駆動させるTFT(半導体素子)13と、TFT13と配線パターン11とを電気的に接続させるためのTFT接続部(配線側端子)14と、有機EL素子124と配線パターン11とを接合する有機EL接続部15とによって構成されている。なお、TFT接続部14は、TFT13の端子パターンに応じて形成されるものである。
本実施の形態の電気光学装置1の製造方法は、主に半導体基板3の製造プロセスと、有機EL基板4の製造プロセスと、これら半導体基板3と有機EL基板4とを貼り合わせるプロセスとを有している。以下、各プロセスについて説明するが、本実施の形態は、特に半導体基板3の製造プロセスについて特徴を有するものである。
まず、半導体基板3の製造プロセスにおいては、半導体素子の形成方法として、配線基板10に対して半導体素子たるTFT13を転写させる方法を採用している。つまり、TFT接続部14を有する配線基板10に対して、TFT13を有する基板(素子基板)を貼り合わせ、該TFT13を配線基板10側に転写させることで、半導体基板3を得ている。そこで、これら配線基板10と素子基板20(図3参照)の製造工程を説明した後に、これら配線基板10と素子基板20との貼合せ工程、及びTFT13の転写工程等について、順を追って説明する。
まず、図2に示した配線基板10の製造工程について説明する。
はじめに、ガラス基板(第1基板)10aを用意する。ガラス基板10aとしては、石英ガラス、ソーダガラス等からなる透光性耐熱基板が好ましい。そして、このガラス基板10aの表面にCVD(化学的気相成長)法を用いて酸化シリコン膜(図示略)を形成した後、該酸化シリコン膜上に配線パターン11を形成する。
次に、図3に示した素子基板20の製造工程について説明する。
はじめに、ガラス基板(第2基板)20aを用意する。ガラス基板20aとしては、石英ガラス、ソーダガラス等からなる透光性耐熱基板が好ましい。そして、このガラス基板20aの表面にTFT13を形成する。TFT13の製造方法は、高温プロセスを含む公知の技術が採用されるので、説明を省略する。なお、ここではTFT13の接続端子61がガラス基板20aの直上に位置するように、つまりTFT13の接続端子61がガラス基板20aの表面に面するように、該TFT13を公知の高温プロセス技術にて形成するものとしている。
以上のような方法により製造した配線基板10と素子基板20の貼り合わせを行う。ここでは、まず、図4(a)及び図6(a)に示したように、配線基板10のガラス基板10a上であって、複数のTFT接続部14にて構成される接続部群の内側領域(貼合せ領域)13aに接着剤51を塗布する。接着剤51の塗布方法は、例えばディスペンス法、フォトリソグラフィ法、或いはインクジェット装置を用いた液滴吐出法等にて行うことができる。
次に、ガラス基板20a側に形成されたTFT13をガラス基板10a側(配線基板10側)に転写するために、ガラス基板20aの剥離を行う。具体的には、図4(c)に示すように、ガラス基板20aの裏面側(素子基板20のTFT13が形成されていない側の面)から、レーザ光Lを照射する。そうすると、剥離層41の原子や分子の結合が弱まり、また、剥離層41内の水素が分子化し、結晶の結合から分離され、即ち、TFT13とガラス基板20aとの結合力が完全になくなり、レーザ光Lが照射された部分のガラス基板20aとTFT13との結合(接着)を容易に取り外すことが可能となる。
以上の転写を行った後、各接続端子14,61間の電気的接続を行う。ここでは、無電解めっき処理法を用いて接続するものとしている。まず、各接続端子14,61の表面の濡れ性向上、及び残さを除去するために処理液に浸漬する。本実施形態では、フッ酸が0.01%〜0.1%、及び硫酸が0.01%〜0.1%含有した水溶液中に1分〜5分間含浸する。あるいは0.1%〜10%の水酸化ナトリウム等のアルカリベースの水溶液に1分〜10分浸漬してもよい。
さらに、ZnOを含有したpH11〜13のジンケート液中に1秒〜2分間浸漬し、端子表面をZnに置換する。その後、5%〜30%の硝酸水溶液に1秒〜60秒浸漬し、Znを剥離する。そして、再度ジンケート浴中に1秒〜2分浸漬し、緻密なZn粒子をAl表面に析出させる。その後、無電解Niめっき浴に浸漬し、Niめっきを形成する。
めっき高さは2μm〜10μm程度析出させる。めっき浴は次亜リン酸を還元剤とした浴であり、pH4〜5、浴温80℃〜95℃である。
次に、半導体基板3と対向して貼り合わせられる有機EL基板の製造プロセスについて説明する。ここでは、公知の有機EL基板の製造方法を採用することができ、具体的には、透明基板120上に陽極122、カソードセパレータ126、正孔注入輸送層123、有機EL素子124、陰極125をそれぞれ図1に示したように形成することで、有機EL基板4を得ている。
次に、上記半導体基板3と有機EL基板4とを貼り合わせて、最終的に図1に示す電気光学装置1を形成する工程について説明する。
まず、半導体基板3上に、導電性材料にて構成される有機EL接続部15を形成し、該有機EL接続部15上には銀ペーストからなる導電性ペースト31を形成する。
次に、有機EL基板4の陰極125が、半導体基板3の導電性ペースト31と当接するように、有機EL基板4と半導体基板3とを貼り合わせる。なお、貼り合わせに際しては、両基板間の空間に封止ペースト30を封入し、更に、両基板の周辺を封止剤32によって封止している。
この電気光学装置1は、有機EL基板4における半導体基板3側から、順に陰極125、有機EL素子124、正孔注入/輸送層123、陽極122が配置された、陽極122側から発光を取り出すトップエミッション型の有機EL装置となる。
Claims (4)
- 配線基板上に半導体素子が実装されてなる半導体基板の製造方法であって、
第1基板の表面に配線側端子を有する配線基板を製造する工程と、
素子側端子を有する半導体素子を、第2基板に対し、前記素子側端子が該第2基板の表面に面するように形成して素子基板を製造する工程と、
前記第1基板のうち前記配線側端子が形成された面と、前記第2基板のうち前記半導体素子が形成された面とをそれぞれ対向させつつ、前記配線側端子が基板面内において前記半導体素子の外側に位置するように、前記配線基板と前記素子基板とを貼り合わせる工程と、
前記貼り合わせの後に、前記第2基板を前記半導体素子から剥離する工程と、
前記第2基板の剥離により剥き出しになった素子側端子と、前記半導体素子の外側に位置する配線側端子とを無電解めっきし、
配線側端子と前記素子側端子との双方から析出して等方成長しためっきを繋げ接合する無電解めっき工程とを含むことを特徴とする半導体基板の製造方法。 - 前記配線基板の形成工程において、複数の配線側端子にて構成される端子群を形成し、
前記貼り合わせの工程において、前記端子群の面内内側領域を貼合せ面として、該内側領域に接着剤を塗布し、該接着剤を介して前記配線基板と前記素子基板とを貼り合わせることを特徴とする請求項1に記載の半導体基板の製造方法。 - 前記端子同士を電気的に接続する工程の前に、前記半導体素子の周りに位置する配線側端子の外側に、めっきの外側への広がりを規制するための絶縁壁を形成することを特徴とする請求項1又は2に記載の半導体基板の製造方法。
- 発光素子を駆動するためのスイッチング素子が配線基板に実装されてなる電気光学装置の製造方法であって、
前記スイッチング素子として半導体素子を用い、該半導体素子を前記配線基板に実装する工程として、請求項1ないし3のいずれか1項に記載の半導体基板の製造方法を用いることを特徴とする電気光学装置の製造方法。
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US11/102,903 US7326639B2 (en) | 2004-04-22 | 2005-04-08 | Method for manufacturing a semiconductor substrate and method for manufacturing an electro-optical device with electroless plating |
CNB2005100649380A CN100495644C (zh) | 2004-04-22 | 2005-04-12 | 半导体基板的制造方法和电光学装置的制造方法 |
KR1020050033012A KR100657074B1 (ko) | 2004-04-22 | 2005-04-21 | 반도체 기판의 제조 방법 및 전기 광학 장치의 제조 방법 |
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2004
- 2004-04-22 JP JP2004126965A patent/JP3956955B2/ja not_active Expired - Fee Related
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2005
- 2005-04-08 US US11/102,903 patent/US7326639B2/en active Active
- 2005-04-12 CN CNB2005100649380A patent/CN100495644C/zh active Active
- 2005-04-21 KR KR1020050033012A patent/KR100657074B1/ko active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9254653B2 (en) | 2013-02-26 | 2016-02-09 | Seiko Epson Corporation | Wiring structure, method of manufacturing wiring structure, liquid droplet ejecting head, and liquid droplet ejecting apparatus |
US9579892B2 (en) | 2013-02-26 | 2017-02-28 | Seiko Epson Corporation | Wiring structure, method of manufacturing wiring structure, liquid droplet ejecting head, and liquid droplet ejecting apparatus |
Also Published As
Publication number | Publication date |
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US20050250306A1 (en) | 2005-11-10 |
US7326639B2 (en) | 2008-02-05 |
KR20060047308A (ko) | 2006-05-18 |
JP2005311122A (ja) | 2005-11-04 |
KR100657074B1 (ko) | 2006-12-13 |
CN100495644C (zh) | 2009-06-03 |
CN1691280A (zh) | 2005-11-02 |
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