JP2023504812A - Dlc製造装置及び製造方法 - Google Patents
Dlc製造装置及び製造方法 Download PDFInfo
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- JP2023504812A JP2023504812A JP2022532851A JP2022532851A JP2023504812A JP 2023504812 A JP2023504812 A JP 2023504812A JP 2022532851 A JP2022532851 A JP 2022532851A JP 2022532851 A JP2022532851 A JP 2022532851A JP 2023504812 A JP2023504812 A JP 2023504812A
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- dlc
- electric field
- reaction chamber
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Abstract
Description
本発明の別の利点は、無線周波数と高圧パルスの放電特性、反応ガスの流量及びコーティング時間などのプロセスパラメータを制御することにより、目標のDLCを得ることができるDLC製造装置及び製造方法を提供することにある。
基材を配置するための反応チャンバを有する本体と、
プラズマ源ユニットと、
前記反応チャンバに反応ガスを供給するための少なくとも1つのガス供給部と
を備え、
前記プラズマ源ユニットは前記本体の外部に設けられ、前記反応チャンバに無線周波数電界を供給してプラズマの発生を促し、前記反応ガスをPECVD法により前記基材の表面に堆積させてDLC膜を成膜する、DLC製造装置を提供する。
基材が配置された反応チャンバ内にプラズマ源ガスを導入するステップ(a)と、
パルス電源及び無線周波数電源を入れて、無線周波数電界及びパルス電界をそれぞれに印加し、前記プラズマ源ガスを活性化させてプラズマを発生させるステップ(b)と、
前記反応チャンバ内に炭化水素ガスCxHyを導入し、前記基材の表面にDLC膜を堆積させるステップ(c)と、を含むDLC膜の製造方法を提供する。
(A)基材が配置された反応チャンバ100内にプラズマ源ガスを導入する;
(B)無線周波数電源30及びパルス電源40を入れて、前記プラズマ源ガスを活性化させてプラズマを発生する;
(C)炭化水素ガスを含む反応ガス原料と補助ガスとのガス混合物を反応チャンバ100内に流し、パルス電界及び無線周波数電界の共同作用でDLC膜を堆積させる;
(D)空気又は不活性ガスを導入して基材を取り出す。
以下、本発明の実施例における各種のコーティング条件のうち、DLCコーティングを行う成膜として、上記の実施形態に記載された所定の条件での成膜を実施例とし、これらの条件以外の条件での成膜を比較例とし、それぞれに、各情況下でのDLCコーティング膜の特性を測定する。なお、実施例および比較例では、成膜装置としては、いずれも図1の前記実施形態に示した構造を持つ装置を使用した。また、基材として、6.5インチの石英ガラススクリーンを用いた。前提条件として、ガラススクリーンを無水エタノール、アセトンでそれぞれに20分間超音波洗浄し、次に窒素ガスを吹き付けて乾燥させ、真空チャンバ内に挟持させ、チャンバ内の空気圧を1.5×10-3Pa以下になるように空気抽出システムで真空引きを行い、高純度アルゴンガスを100SCCM導入し、バイアス電源(DCパルス)及び無線周波数電源をオンにし、チャンバの圧力を25mtorr、バイアス電源電圧を500~900V、デューティ比を10%、周波数を80kHzに制御し、基材を10分間洗浄する必要がある。続いて、基材上に膜をコーティングし、以下に説明する各実施例及び比較例に示すように、ICP強化CVD法によってDLCコーティングを行う。
まず、実施例1~3および比較例1、2として、コーティングガスは、純度が99.999%のCH4とArの組み合わせである。実施例1~3および比較例1、2におけるコーティング条件(気圧、ガス流量、電源条件、コーティング時間)を以下の表2に示す。さらに、表2には、様々なコーティング条件下での膜層の特性(膜厚、硬度、光透過率)が記載されている。
まず、実施例4~6および比較例3、4では、反応ガスとして、ガス純度が99.9%のC2H2とガス純度が99.999%のArの組み合わせを使用した。実施例4~6および比較例3、4におけるコーティング条件(気圧、ガス流量、電源条件、コーティング時間)を以下の表3に示す。さらに、表3には、様々なコーティング条件での膜層の特性(膜厚、硬度、光透過率)が記載されている。
まず、実施例7~9および比較例5、6として、コーティングガスは、純度が99.999%のC2H2およびH2の組み合わせである。実施例7~9および比較例5、6におけるコーティング条件(気圧、ガス流量、電源条件、コーティング時間)を以下の表4に示す。さらに、表4には、様々なコーティング条件での膜層の特性(膜厚、硬度、光透過率)が記載されている。
Claims (37)
- 基材を配置するための反応チャンバを有する本体と、
プラズマ源ユニットと、
前記反応チャンバに反応ガスを供給するための少なくとも1つのガス供給部と
を備え、
前記プラズマ源ユニットは前記本体の外部に設けられ、前記反応チャンバに無線周波数電界を印加してプラズマの発生を促し、前記反応ガスをPECVD法により前記基材の表面に堆積させてDLC膜を成膜する、ことを特徴とするDLC製造装置。 - 前記プラズマ源ユニットと電気的に接続され、前記プラズマ源ユニットに電源を供給する無線周波数電源を備える、請求項1に記載のDLC製造装置。
- 前記プラズマ源ユニットは、前記本体の外部に気密に設けられたガス導入枠と、誘導コイルと、前記ガス導入枠と前記誘導コイルとの間に設けられた遮断板とを備える、請求項1に記載のDLC製造装置。
- 前記ガス導入枠は、前記本体の前記反応チャンバと前記ガス供給部とを連通させる連通経路を有する、請求項3に記載のDLC製造装置。
- 前記ガス導入枠は、少なくとも1つの連通孔とメイン経路とを有し、前記本体は、前記反応チャンバに連通する窓部を有し、前記本体の前記窓部と前記ガス導入枠の前記連通孔及び前記メイン経路を連通して前記連通経路を形成する、請求項4に記載のDLC製造装置。
- 前記連通口と前記メイン経路は互いに垂直な方向に設けられている、請求項5に記載のDLC製造装置。
- 前記ガス導入枠は、外部と連通してガスを注入するための少なくとも1つの連通孔と、前記ガス導入枠の内側に設けられかつ前記メイン経路に連通する空気分配孔と、前記連通孔と前記空気分配孔とを連通させる内側連通経路と、メイン経路とを有し、前記本体の前記窓部、前記ガス導入枠の前記連通孔、前記内側連通経路、前記空気分配孔及び前記メイン経路を連通して前記連通経路を形成する、請求項4に記載のDLC製造装置。
- 複数の前記内側連通経路同士を互いに連通して内側環状経路を形成する、請求項7に記載のDLC製造装置。
- 前記プラズマ源ユニットは、さらに外部カバープレートを備え、前記誘導コイルは前記遮断板と前記外部カバープレートとの間に挟持されている、請求項3に記載のDLC製造装置。
- 前記ガス導入枠は、前記本体の外部に気密に設けられたメイン枠体と、前記メイン枠体の外部に配置されるとともに、前記遮断板、前記誘導コイル及び前記外部カバープレートが挿着される挿着部材とを備える、請求項9に記載のDLC製造装置。
- 前記遮断板はセラミック製封止板である、請求項3に記載のDLC製造装置。
- 前記プラズマ源ユニットは、誘導結合電界を印加する無線周波数誘導結合プラズマ源である、請求項1に記載のDLC製造装置。
- 載置極板と、パネル電源とを備え、前記載置極板は前記反応チャンバに収容されるとともに、前記パルス電源と電気的に接続され、前記反応チャンバにパルス電界を印加するものであり、前記基材は前記載置極板に好適に配置されている、請求項1~12の何れか1項に記載のDLC製造装置。
- 前記載置極板は、前記載置極板の両側を連通させる空気孔を有する、請求項13に記載のDLC製造装置。
- 隙間を置いて平行に配置されている複数の載置極板を備える、請求項13に記載のDLC製造装置。
- 前記パルス電源の電圧制御範囲は、-200V~-5000Vである、請求項13に記載のDLC製造装置。
- 前記ガス供給部は、プラズマ源供給部を備え、前記プラズマ源供給部は、前記反応チャンバにプラズマ源ガスを供給し、PECVD法による堆積反応を活性化させるものである、請求項1~12の何れか1項に記載のDLC製造装置。
- 前記プラズマ源ガスは、不活性ガス、窒素ガス、フルオロカーボンガスからなる群より選ばれる少なくとも一つである、請求項17に記載のDLC製造装置。
- 前記ガス供給部は、前記反応チャンバに炭化水素ガスCxHyを供給するための反応ガス原料供給部を備え、前記炭化水素ガスCxHyは、PECVD法により前記基材の表面に堆積し、前記ダイヤモンドライクカーボン膜を成膜する、請求項1~12の何れか1項に記載のDLC製造装置。
- 前記ガス供給部は、前記反応チャンバに補助ガスを供給するための補助ガス供給部を備え、前記補助ガスは、前記ダイヤモンドライクカーボン膜におけるC-H含量を調整し、前記炭化水素ガスCxHyと反応して前記基材の表面に堆積させて、前記ダイヤモンドライクカーボン膜を成膜する、請求項1~12の何れか1項に記載のDLC製造装置。
- 前記補助ガスは、窒素ガス、水素ガス、フルオロカーボンガスからなる群より選ばれる少なくとも一つである、請求項20に記載のDLC製造装置。
- 前記基材の配置位置と同等の位置に設けられている温度検出モジュールを備える、請求項1~12の何れか1項に記載のダイヤモンドライクカーボン膜の製造装置。
- 反応チャンバに反応ガスを供給し、無線周波数電界及びパルス電界によって、反応ガスをPECVD法により前記反応チャンバ内の基材の表面に堆積させてDLC膜を成膜するように促す、ことを特徴とするDLC膜の製造方法。
- 制御過程において、無線周波数電界を印加してからパルス電界を印加する、請求項23に記載のDLC膜の製造方法。
- 前記無線周波数電界は前記パルス電界の外部に設けられている、請求項23に記載のDLC膜の製造方法。
- 前記無線周波数電界は誘導結合電界である、請求項23に記載のDLC膜の製造方法。
- 前記反応チャンバにプラズマ源ガスを供給し、PECVD法による堆積反応を活性化させ、前記無線周波数電界及び前記パルス電界を前記プラズマ源ガスに同時に作用させるステップを含む、請求項23~26の何れか1項に記載のDLC膜の製造方法。
- 前記反応チャンバに補助ガスを供給するステップであって、前記補助ガスは、前記ダイヤモンドライクカーボン膜におけるC-H含量を調整し、前記炭化水素ガスCxHyと反応して前記基材の表面に堆積させて前記DLC膜を成膜するものであるステップを含む、請求項23~26の何れか1項に記載のDLC膜の製造方法。
- パルス電源と電気的に接続され、前記反応チャンバ内において前記パルス電界を印加する載置極板を前記反応チャンバ内に配置する、請求項23~26の何れか1項に記載のDLC膜の製造方法。
- 前記基材の同等の位置の温度を検出してフィードバック制御を行うステップを含む、請求項23~26の何れか1項に記載のDLC膜の製造方法。
- 基材が配置された反応チャンバ内にプラズマ源ガスを導入するステップ(a)と、
パルス電源及び無線周波数電源を入れて、無線周波数電界及びパルス電界をそれぞれに印加し、前記プラズマ源ガスを活性化させてプラズマを発生させるステップ(b)と、
前記反応チャンバ内に炭化水素ガスCxHyを導入し、前記基材の表面にDLC膜を堆積させるステップ(c)と、を含むことを特徴とするDLC膜の製造方法。 - 前記ステップ(b)において、無線周波数電源を入れてから、パルス電源を入れる、請求項31に記載のDLC膜の製造方法。
- パルス電界の外部に無線周波数電界を印加するステップを含む、請求項31に記載のDLC膜の製造方法。
- 前記無線周波数電界は誘導結合電界である、請求項31に記載のDLC膜の製造方法。
- ステップ(c)は、前記反応チャンバに補助ガスを供給するステップを含み、前記補助ガスは、前記ダイヤモンドライクカーボン膜におけるC-H含量を調整し、前記炭化水素ガスCxHyと反応して前記基材の表面に堆積させて前記ダイヤモンドライクカーボン膜を成膜するものである、請求項31~34の何れか1項に記載のDLC膜の製造方法。
- 前記反応チャンバ内のガスを抽出し、前記反応チャンバ内の気圧を調整するステップを含む、請求項35に記載のダイヤモンドライクカーボン膜の製造方法。
- 前記基材の同等の位置の温度を検出してフィードバック制御を行うステップを含む、請求項35に記載のダイヤモンドライクカーボン膜の製造方法。
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US20220380902A1 (en) | 2022-12-01 |
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EP4071270A1 (en) | 2022-10-12 |
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TWI772969B (zh) | 2022-08-01 |
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