JP5492196B2 - 低圧ガス相の中で薄膜ポリマーを堆積させるための堆積方法 - Google Patents
低圧ガス相の中で薄膜ポリマーを堆積させるための堆積方法 Download PDFInfo
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Description
この目的は請求項に記載された発明によって達成され、各請求項は基本的に本発明の目的を達成する独立した方法を示し、従属項は好ましくは独立項と結び付く。
その方法は同様にOLEDの堆積によく適合する。
基板が堆積チャンバーに導入された後、キャリアガスは最初にガス注入部を通って堆積チャンバーに流れる。キャリアガスは希ガスまたは化学反応が不活発であって特に不活性である他のガスである。キャリアガスは、ガス排出部を通って堆積チャンバーから再び排出される。キャリアガスは真空ポンプによって吸い出される。
この圧力で、基板の底面がサセプタの上で支持される個々の接触ポイントは別として基板は実質的にサセプタから熱的に分離される。これは、ガス注入部から来て基板によって吸収される放射熱をもはや十分な程度に取り除くことができないという結果を生じ、それで基板とサセプタの間の温度差が連続的に増加する。
けれども、堆積プロセスの成長率は非常に大きいので成長時間は数秒のみ、例えば、1から4秒であってよい。従って、成長時間は10秒より少ないので、対流による冷却がない結果として依然として基板を加熱する時間は20秒より少ない。基板の熱容量は十分に大きい。それで、この時間に起こる基板温度の上昇は許容される。
Claims (16)
- 1以上の薄い層を堆積させるための堆積方法であって、
サセプタ(4)の支持面(4’)がガス注入部(3)に対向して当該ガス注入部(3)から間隔をあけて配置され、当該支持面(4’)に支持される基板(7)の表面(7’)上にポリマーの形で前記薄い層を堆積させるために、ポリマーまたは有機原料を形成するプロセスガスが前記ガス注入部(3)を通って搬送ガスと一緒に堆積チャンバー(8)の中に流れるステップを備え、
前記支持面(4’)の温度(TS)が前記ガス注入部(3)の温度(TG)より低くなるように前記ガス注入部(3)および/または前記支持面(4’)の温度が制御され、
プロセスガスが前記堆積チャンバー(8)に入る前に前記堆積チャンバー(8)の圧力が第1の圧力(P1)であるとき、前記支持面(4’)に支持される前記基板(7)の基板温度(TD)が、前記基板(7)の底面と前記サセプタ(4)の支持面(4’)との間のギャップ中で起こる対流による熱の移動によって一定に保たれ、
前記一定の基板温度(TD)は、前記ガス注入部(3)の温度(TG)より低く、前記支持面(4’)の温度(TS)より高いが、前記薄い層が堆積可能な温度であり、
その後に、前記堆積チャンバー(8)の第1の圧力(P1)がプロセス圧力(P2)まで減少し、前記プロセス圧力(P2)が達成されるとき、プロセスガスが前記堆積チャンバー(8)に入り、前記基板温度(TD)からの前記基板(7)の温度上昇が許容される間に前記薄い層を前記基板(7)に堆積させる、
ことを特徴とする堆積方法。 - 搬送ガスとプロセスガスがガス放出面(3’)のスルーポート(6)から放出され、当該ガス放出面(3’)は高光沢の仕上げを持ち、金めっきされていることを特徴とする請求項1に記載の堆積方法。
- 前記ガス注入部(3)が、前記ガス放出面(3’)を形成し、シャワーヘッドの方法で形成され、加熱されることを特徴とする請求項2に記載の堆積方法。
- 前記ガス注入部(3)が、電気の加熱ワイヤまたは液体が流れる経路(19)によって加熱されることを特徴とする請求項2に記載の堆積方法。
- 前記加熱ワイヤまたは液体が流れる前記経路(19)が前記ガス注入部(3)のフロントプレートに配置され、当該フロントプレートが前記ガス放出面(3’)を形成することを特徴とする請求項4に記載の堆積方法。
- 前記サセプタ(4)が、冷却ブロックによって形成され、積極的に冷却されることを特徴とする請求項1に記載の堆積方法。
- 前記ガス放出面(3’)の温度(TG)が、前記支持面(4’)の温度(TS)より少なくとも50℃高いことを特徴とする請求項2に記載の堆積方法。
- 前記ガス放出面(3’)の温度(TG)が、150℃と250℃の間の範囲にあることを特徴とする請求項7に記載の堆積方法。
- 前記サセプタ(4)の温度が、−30℃と100℃の間の範囲にあることを特徴とする請求項1に記載の堆積方法。
- 前記プロセス圧力(P2)が、1ミリバールより低いことを特徴とする請求項1に記載の堆積方法。
- 温度の安定化が100℃より低い基板温度(TD)で、1ミリバール以上の前記第1の圧力(P1)で起こることを特徴とする請求項1に記載の堆積方法。
- プロセスガスが、蒸発したモノマーまたは重合体出発原料であることを特徴とする請求項1に記載の堆積方法。
- プロセスガスが、蒸発した液体または固体の出発原料であり、光制限または光起電の層として、OLEDの形で前記基板(7)上に凝結することを特徴とする請求項1に記載の堆積方法。
- ポリマー物質の1以上の薄い層を堆積させるための堆積方法であって、
ポリマーから形成される固体または液体の出発原料が蒸発器(1)で蒸発するステップと、
前記出発原料が、前記蒸発器(1)から搬送ガスライン(13)を通って熱分解チャンバー(2)に搬送ガスによって運ばれ、前記熱分解チャンバー(2)の中でモノマーに熱分解されるステップと、
分解生成物が前記熱分解チャンバー(2)から堆積チャンバー(8)に搬送ガスによって運ばれ、そこでガス注入部(3)を通って前記堆積チャンバー(8)の中に流れ、サセプタ(4)の支持面(4’)に支持される基板(7)の表面(7’)上に前記薄い層として重合させられるステップと、
搬送ガスと分解生成物の重合しなかった部分がガス排出部(5)を通って前記堆積チャンバー(8)から排出されるステップと、
を備え、
前記支持面(4’)の温度(TS)が前記ガス注入部(3)の温度(TG)より低くなるように前記ガス注入部(3)および/または前記支持面(4’)の温度が制御され、
プロセスガスが前記堆積チャンバー(8)に入る前に前記堆積チャンバー(8)の圧力が第1の圧力(P1)であるとき、前記支持面(4’)に支持される前記基板(7)の基板温度(TD)が、前記基板(7)の底面と前記サセプタ(4)の支持面(4’)との間のギャップ中で起こる対流による熱の移動によって一定に保たれ、
前記一定の基板温度(TD)は、前記ガス注入部(3)の温度(TG)より低く、前記支持面(4’)の温度(TS)より高いが、前記薄い層が堆積可能な温度であり、
その後に、前記堆積チャンバー(8)の第1の圧力(P1)がプロセス圧力(P2)まで減少し、前記プロセス圧力(P2)が達成されるとき、プロセスガスが前記堆積チャンバー(8)に入り、前記基板温度(TD)からの前記基板(7)の温度上昇が許容される間に前記薄い層を前記基板(7)に堆積させる、
ことを特徴とする堆積方法。 - 前記基板(7)の表面(7’)に垂直な方向に、密集した、前記支持面(4’)一面に実質的に広がるガスボリュームの流れに結合するガスジェットの形で、前記ガス注入部(3)によって形成されるガス表面分配器のガス放出面(3’)のスルーポート(6)から、分解生成物が搬送ガスと一緒に前記堆積チャンバー(8)の中に流れ、
前記スルーポート(6)が前記支持面(4’)に平行に広がる前記ガス放出面(3’)
一面に分布する、
ことを特徴とする請求項14に記載の堆積方法。 - 前記ガス放出面(3’)の面積の広さが、前記支持面(4’)または前記基板(7)の面積の広さよりも広いことを特徴とする請求項15に記載の堆積方法。
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