JP4992123B2 - マイクロチップ基板の接合方法、及びマイクロチップ - Google Patents
マイクロチップ基板の接合方法、及びマイクロチップ Download PDFInfo
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- JP4992123B2 JP4992123B2 JP2008546935A JP2008546935A JP4992123B2 JP 4992123 B2 JP4992123 B2 JP 4992123B2 JP 2008546935 A JP2008546935 A JP 2008546935A JP 2008546935 A JP2008546935 A JP 2008546935A JP 4992123 B2 JP4992123 B2 JP 4992123B2
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- microchip
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- film
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
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- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
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Description
11、31、40、51 微細流路
12、21、32、70 塗布溶液
13、14、22、23、33、52、61、71 SiO2膜
この発明の第1実施形態に係るマイクロチップ基板の接合方法、及びその方法により製造されたマイクロチップについて、図1を参照して説明する。図1は、この発明の第1実施形態に係るマイクロチップ基板の接合方法を説明するためのマイクロチップ基板の断面図である。
(硬化後にSiO2が主成分となる塗布溶液の具体例)
塗布溶液としては、例えば、アルコキシシランを加水分解、縮重合して得られるポリシロキサンオリゴマーをアルコール溶媒に溶かしたものを用いる。塗布溶液を加熱してアルコール溶媒を揮発させると、SiO2膜が形成される。具体的には、JSR社製のグラスカ7003や、コルコート社製のメチルシリケート51などが挙げられる。
(塗布溶液12、21の塗布方法)
塗布溶液12、21をマイクロチップ基板10、20に均一に塗布することが重要である。塗布溶液12、21の物性(粘度、揮発性、表面張力、ぬれ性)を考慮し、塗布方法を適宜選択する。例えば、ディッピング、スプレーコーティング、スピンコーティング、スリットコーティング、スクリーン印刷、パッド印刷、インクジェット印刷などが挙げられる。
(塗布溶液12、21の硬化方法)
塗布溶液12、21を硬化させてSiO2膜を形成する際には、塗布溶液12、21の溶媒を十分に揮発させ、SiO2の強固なネットワークを形成できることが望ましい。塗布溶液12、21の物性(粘度、揮発性、触媒)を考慮し、硬化方法を適宜選択する。例えば、常温で塗布溶液12、21を放置して硬化させたり、塗布溶液12、21を60℃〜100℃の温度で加熱することで硬化させたり、塗布溶液12、21を高温高湿下(温度60℃で湿度90%、温度80℃で湿度90%など)で硬化させたりする。また、UV硬化や、可視光硬化などを利用して塗布溶液12、21を硬化させても良い。
[変形例1]
第1実施形態に係るマイクロチップ基板の接合方法の変形例1、及びその方法により製造されるマイクロチップについて、図2を参照して説明する。図2は、変形例1に係るマイクロチップ基板の接合方法を説明するためのマイクロチップ基板の断面図である。
[変形例2]
次に、第1実施形態に係るマイクロチップ基板の接合方法の変形例2、及びその方法によって製造されるマイクロチップについて、図3を参照して説明する。図3は、変形例2に係るマイクロチップ基板の接合方法を説明するためのマイクロチップ基板の断面図である。上記変形例1では、微細流路11が形成されたマイクロチップ基板10に、硬化後にSiO2が主成分となる塗布溶液12を塗布してSiO2膜を形成したが、変形例2では、接合の相手方となるマイクロチップ基板20に塗布液21を塗布し、マイクロチップ基板10には、基板同士を重ねる前に、SiO2膜を形成した。
[第2の実施の形態]
次に、この発明の第2実施形態に係るマイクロチップ基板の接合方法、及びその方法によって製造されるマイクロチップについて、図4を参照して説明する。図4は、この発明の第2実施形態に係るマイクロチップ基板の接合方法を説明するためのマイクロチップ基板の断面図である。第1実施形態では、一方のマイクロチップ基板のみに微細流路を形成したが、第2実施形態では、両方のマイクロチップ基板に微細流路を形成した。
[第3の実施の形態]
次に、この発明の第3実施形態に係るマイクロチップ基板の接合方法、及びその方法によって製造されるマイクロチップについて、図5を参照して説明する。図5は、この発明の第3実施形態に係るマイクロチップ基板の接合方法を説明するためのマイクロチップ基板の断面図である。
[実施例]
次に、具体的な実施例について図6を参照して説明する。図6は、各実施例の条件を示す表である。
(実施例1)
実施例1では、上記第1実施形態の具体例を説明する。
(マイクロチップ基板)
射出成形機で透明樹脂材料のポリメタクリル酸メチル樹脂(三菱レーヨン製、アクリペットVH)を成形し、外形寸法が50mm×50mm×1mmの板状部材に幅50μm、深さ50μmの複数の微細流路と、内径2mmの複数の貫通孔で構成される流路側マイクロチップ基板を作製した。この流路側マイクロチップ基板が、上記第1実施形態における微細流路11が形成されたマイクロチップ基板10に相当する。また、同様に、外形寸法が50mm×50mm×1mmのカバー側マイクロチップ基板を作製した。このカバー側マイクロチップ基板が、第1実施形態における蓋(カバー)として機能するマイクロチップ基板20に相当する。
(塗布溶液の塗布)
上記の流路側マイクロチップ基板とカバー側マイクロチップ基板の接合面に、スプレーコーター(EVG社製、ナノスプレーコーティング)を使用し、塗布溶液(JSR社製、グラスカ7506)を1μmの厚さになるように調整して塗布した。スプレーコーターを使用することで、幅50μm、深さ50μmの微細流路内部にも均一に塗布溶液を塗布することができた。微細流路内の塗布膜の厚さは0.5μmであった。
(接合)
次に、流路側マイクロチップ基板とカバー側マイクロチップ基板の塗布溶液を塗布した面同士を重ねて、80℃のオーブンに30分間投入して塗布溶液を硬化させ、流路側マイクロチップ基板とカバー側マイクロチップ基板を接合した。これと同時に、SiO2膜が主成分となるハイブリッド膜が形成された。これにより、マイクロチップが作製されたことになる。
(評価)
上記マイクロチップを、シリンジポンプにつなぎ、水を圧送したところ、微細流路から液体が漏れることなく十分な密封性を示し、水への濡れ性も良く、十分な親水性を示した。なお、液送の圧力は0.13MPaとした。
(実施例2)
実施例2では、上記第1実施形態の具体例を説明する。実施例2では、カバー側マイクロチップ基板にフィルムを用いた。
(マイクロチップ基板)
射出成形機で透明樹脂材料の環状ポリオレフィン樹脂(日本ゼオン社製、ゼオノア)を成形し、外形寸法が50mm×50mm×1mmの板状部材に幅50μm、深さ50μm、の複数の微細流路と、内径2mmの複数の貫通孔で構成される流路側マイクロチップ基板を作製した。この流路側マイクロチップ基板が、上記第1実施形態における微細流路11が形成されたマイクロチップ基板10に相当する。また、カバー側マイクロチップ基板には、透明樹脂フィルム(日本ゼオン社製、ゼオノアフィルム)を流路側マイクロチップ基板と同様の大きさに切断して使用した。フィルムの厚さは100μmである。このフィルム状のカバー側マイクロチップ基板が、第1実施形態における蓋(カバー)として機能するマイクロチップ基板20に相当する。
(塗布溶液の塗布)
上記の流路側マイクロチップ基板とカバー側マイクロチップ基板の接合面に、スプレーコーター(ウシオ電機社製、USC−200ST)を使用し、塗布溶液(AZエレクトロニックマテリアルズ社製、アクアミカ)を1μmの厚さになるように調整して塗布した。スプレーコーターを使用することで、幅50μm、深さ50μmの微細流路内部にも均一に塗布溶液を塗布することができた。微細流路内の塗布膜の厚さは0.5μmであった。
(接合)
次に、流路側マイクロチップ基板とカバー側マイクロチップ基板の塗布溶液を塗布した面同士を重ねて、100℃のオーブンに1時間投入し、仮硬化させた。この段階で、流路側マイクロチップ基板とカバー側マイクロチップ基板は強固に接合されているものの、十分に水と反応できていないため、有機成分を微量ながら含んでいた。そこで、さらに温度80℃で湿度90%の高温高湿槽に3時間投入することで、SiO2膜を形成した。これにより、マイクロチップが作製されたことになる。
(評価)
上記マイクロチップを、シリンジポンプにつなぎ、水を圧送したところ、微細流路から液体が漏れることなく十分な密封性を示し、水への濡れ性も良く、十分な親水性を示した。なお、液送の圧力は0.13MPaとした。
(実施例3)
実施例3では、上記変形例2の具体例を説明する。実施例3では、蓋(カバー)として機能する平板状のマイクロチップ基板に塗布溶液を塗布して、基板同士を接合した。
(マイクロチップ基板)
射出成形機で透明樹脂材料の環状ポリオレフィン樹脂(日本ゼオン社製、ゼオノア)を成形し、外形寸法が50mm×50mm×1mmの板状部材に幅50μm、深さ50μmの複数の微細流路と、内径2mmの複数の貫通孔で構成される流路側マイクロチップ基板を作製した。この流路側マイクロチップ基板が、上記変形例2における微細流路11が形成されたマイクロチップ基板10に相当する。また、カバー側マイクロチップ基板には、透明樹脂フィルム(日本ゼオン社製、ゼオノアフィルム)を使用した。フィルムの形状は、幅900mm、厚さが100μmでロール状に巻いてある。このフィルム状のカバー側マイクロチップ基板が、上記変形例2におけるマイクロチップ基板20に相当する。
(塗布溶液の塗布)
上記流路側マイクロチップ基板の接合面にCVD成膜装置(サムコ社製、PD−270ST)にて、SiO2膜を150nm形成した。CVDの原料は、TEOS(ADEKA社製)を使用した。CVD成膜装置を使用することで、幅50μm、深さ50μmの微細流路内部にも均一にSiO2膜を形成することができた。微細流路内のSiO2膜の厚さは100nmであった。また、カバー側マイクロチップ基板の接合面には、スリットコーターを使用して、塗布溶液(AZエレクトロニックマテリアルズ社製、アクアミカ)を1μmの厚さになるように調整して塗布した。
(接合)
次に、流路側マイクロチップ基板のSiO2膜を形成した面と、カバー側マイクロチップ基板の塗布溶液を塗布した面を重ねて、100℃のオーブンに1時間投入し、仮硬化させた。この段階で、流路側マイクロチップ基板とカバー側マイクロチップ基板は強固に接合されているものの、十分に水と反応できていないため、有機成分を微量ながら含んでいた。そこで、さらに温度80℃で湿度90%の高温高湿槽に3時間投入することで、SiO2膜を形成した。これにより、マイクロチップが作製されたことになる。
(評価)
上記マイクロチップを、シリンジポンプにつなぎ、水を圧水したところ、微細流路から液体が漏れることなく十分な密封性を示し、水への濡れ性も良く、十分な親水性を示した。なお、液送の圧力は0.13MPaとした。
(実施例4)
実施例4では、上記第3実施形態の具体例を説明する。
(マイクロチップ基板)
射出成形機で透明樹脂材料の環状ポリオレフィン樹脂(日本ゼオン社製、ゼオノア)を成形し、外形寸法が50mm×50mm×1mmの板状部材に幅50μm、深さ50μmの複数の微細流路と、内径2mmの複数の貫通孔で構成される流路側マイクロチップ基板を作製した。この流路側マイクロチップ基板が、上記第3実施形態における微細流路51が形成されたマイクロチップ基板50に相当する。また、カバー側マイクロチップ基板には、透明樹脂フィルム(日本ゼオン社製、ゼオノアフィルム)を流路側マイクロチップ基板と同様の大きさに切断して使用した。フィルムの厚さは100μmである。このフィルム状のカバー側マイクロチップ基板が、第3実施形態における蓋(カバー)として機能するマイクロチップ基板60に相当する。
(塗布溶液の塗布)
上記流路側マイクロチップ基板の接合面と、カバー側マイクロチップ基板の接合面にCVD成膜装置(サムコ社製、PD−270ST)にて、SiO2膜を150nm形成した。CVDの原料は、TEOS(ADEKA社製)を使用した。CVD成膜装置を使用することで、幅50μm、深さ50μmの微細流路内部にも均一にSiO2膜を形成することができた。微細流路内部のSiO2膜の厚さは100nmであった。さらに、カバー側マイクロチップ基板に対してはSiO2膜を形成した表面(接合面)に、スプレーコーター(ウシオ電機社製、USC−200ST)を使用して、塗布溶液(AZエレクトロニックマテリアルズ社製、アクアミカ)を1μmの厚さとなるように調整して塗布した。
(接合)
次に、流路側マイクロチップ基板のSiO2膜を形成した面と、カバー側マイクロチップ基板の塗布溶液を塗布した面を重ねて、100℃のオーブンに1時間投入し、仮硬化させた。この段階で、流路側マイクロチップ基板とカバー側マイクロチップ基板は強固に接合されているものの、十分に水と反応できていないため、有機成分を微量ながら含んでいた。そこで、さらに温度80℃で湿度90%の高温高湿槽に3時間投入することで、SiO2膜を形成した。これにより、マイクロチップが作製されたことになる。
また、マイクロチップ基板やフィルムの耐薬品性が弱い場合、塗布溶液に使用している溶剤のダメージを受けてしまう場合がある。これに対して、実施例4では、フィルム状のカバー側マイクロチップ基板の表面にCVD装置などで緻密なSiO2膜を形成しておくことで、フィルムの損傷を防ぐことが可能となる。その結果、使用可能な溶剤の選択肢が広がるという効果がある。なお、この実施例4では、フィルム状のカバー側マイクロチップ基板の表面へのコーティングとして、SiO2膜を用いたが、SiO2膜の代わりにアクリル系、シリコン系のハードコート膜をフィルム状のカバー側マイクロチップ基板に形成しておいても良い。
(評価)
上記マイクロチップを、シリンジポンプにつなぎ、水を圧送したところ、微細流路から液体が漏れることなく十分な密封性を示し、水への濡れ性も良く、十分な親水性を示した。なお、液送の圧力は0.13MPaとした。
Claims (4)
- 2つの樹脂製部材のうち少なくとも1つの樹脂製部材には流路用溝が形成され、前記2つの樹脂製部材を、前記流路用溝が形成されている面を内側にして接合するマイクロチップ基板の接合方法であって、
前記2つの樹脂製部材のうち、一方の樹脂製部材には前記流路用溝が形成され、他方の樹脂製部材は平板状の部材であり、
前記一方の樹脂製部材の前記流路用溝が形成された面に塗布溶液を塗布し、前記他方の樹脂製部材の前記接合する面にSiO 2 を主成分とする膜を形成し、
前記2つの樹脂製部材の前記接合する面同士を向かい合わせて前記2つの樹脂製部材を重ね、
その後、前記塗布溶液を硬化させることで前記2つの樹脂製部材を接合することを特徴とするマイクロチップ基板の接合方法。 - 2つの樹脂製部材のうち少なくとも1つの樹脂製部材には流路用溝が形成され、前記2つの樹脂製部材を、前記流路用溝が形成されている面を内側にして接合するマイクロチップ基板の接合方法であって、
前記2つの樹脂製部材のうち、一方の樹脂製部材には前記流路用溝が形成され、他方の樹脂製部材は平板状の部材であり、
前記他方の樹脂製部材の前記接合する面に塗布溶液を塗布し、前記一方の樹脂製部材の前記流路用溝が形成された面にSiO 2 を主成分とする膜を形成し、
前記2つの樹脂製部材の前記接合する面同士を向かい合わせて前記2つの樹脂製部材を重ね、
その後、前記塗布溶液を硬化させることで前記2つの樹脂製部材を接合することを特徴とするマイクロチップ基板の接合方法。 - 2つの樹脂製部材のうち少なくとも1つの樹脂製部材には流路用溝が形成され、前記2つの樹脂製部材を、前記流路用溝が形成されている面を内側にして接合するマイクロチップ基板の接合方法であって、
前記2つの樹脂製部材のうち、一方の樹脂製部材には前記流路用溝が形成され、他方の樹脂製部材は平板状の部材であり、
前記2つの樹脂製部材の前記接合する面それぞれにSiO 2 を主成分とする膜を形成し、
前記他方の樹脂製部材の前記接合する面に塗布溶液を塗布し、
前記2つの樹脂製部材の前記接合する面同士を向かい合わせて前記2つの樹脂製部材を重ね、
その後、前記塗布溶液を硬化させることで前記2つの樹脂製部材を接合することを特徴とするマイクロチップ基板の接合方法。 - 請求の範囲第1項から請求の範囲第3項のいずれかのマイクロチップ基板の接合方法によって接合されたことを特徴とするマイクロチップ。
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