JP4331752B2 - 制御aom負荷を用いたレーザパルスピッキング - Google Patents
制御aom負荷を用いたレーザパルスピッキング Download PDFInfo
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Description
Claims (32)
- パルスレーザ放射を発生させるレーザベースのシステムであり、制御コマンドに応じて、加工レーザ出力の状態でターゲットの方向にレーザ出力が伝搬することを可能とする出力伝送状態と、ターゲットの方向に前記加工レーザ出力が伝搬することを主として防止する出力遮断状態とを生じる外部共振型光学変調器を備え、連続した出力伝送状態間の非等間隔の結果として、動作中に前記加工レーザ出力の不所望な波面歪曲を生じさせる熱負荷変動の状態を、前記外部共振型光学変調器に生じさせる前記レーザベースのシステムにおいて、前記加工レーザ出力の前記熱負荷変動及び前記不所望な波面歪曲を低減する方法であって、
相互に隣接したレーザ出力の1つずつが、ほぼ均一のレーザ出力間隔で互いに分離しており、ほぼ一定のレーザ出力繰返し率で、一連のレーザ出力を発生させるステップと、
所定の動作許容範囲内に前記外部共振型光学変調器の熱負荷変動を保つように、相互に隣接した前記出力伝送状態の1つずつが、ほぼ均一のRFパルス間隔で互いに分離しているRFパルス繰返し率で、一連の出力伝送状態を生成するように、前記外部共振型光学変調器にRFパルスを供給するステップと、
種々の加工レーザ出力間隔でターゲット照射を行うように、加工レーザ出力を妨げるための時間不一致RFパルスの期間では、前記出力伝送状態と対応するレーザ出力とを一致させず、加工レーザ出力を伝送するための時間一致RFパルスの期間では、前記出力伝送状態と対応するレーザ出力とを一致させるような制御コマンドに応じて、前記RFパルスの供給及び前記レーザ出力の発生をタイミング調整するステップとを含む方法。 - RFパルスが、RFパワー値とRF持続時間とを有し、前記加工レーザ出力が、パワー値を有し、
対応する変更を前記加工レーザ出力の前記パワー値に生じさせるために、時間一致のRFパルスの前記RFパワー値を変更するステップを更に含む請求項1に記載の方法。 - 時間一致及び時間不一致である連続したRFパルスが、種々のRF持続時間を有する請求項2に記載の方法。
- 時間一致及び時間不一致である連続したRFパルスが、種々のRFパワー値を有する請求項2に記載の方法。
- 時間一致及び時間不一致である連続したRFパルスが、同様のRFパワー値及び同様のRF持続時間を有する請求項2に記載の方法。
- 前記レーザ出力間隔とRFパルス間隔との間の差が、所定の動作許容範囲内で、前記外部共振型光学変調器の熱負荷変動を維持するのに、十分に小さい、請求項1に記載の方法。
- 相互に隣接する加工レーザ出力間の間隔が、前記レーザ出力間隔の整数倍に近似する、種々の持続時間を有する請求項1に記載の方法。
- 時間不一致RFパルスが、ワークピースの種々のターゲット間において位置決めシステムを操作している間に生じる請求項1に記載の方法。
- 前記制御コマンドが、オンザフライ・リンク処理用に構成されている請求項1に記載の方法。
- 前記レーザベースのシステムが、微細加工処理用に構成されている請求項1に記載の方法。
- 前記レーザベースのシステムが、分光器用、バイオテクノロジー用、又は、研究開発活動用に構成されている請求項1に記載の方法。
- 前記レーザ出力繰返し率が、約25kHzより高い、請求項1に記載の方法。
- 前記レーザ出力繰返し率が、約40kHzより高い、請求項1に記載の方法。
- 前記レーザ出力繰返し率が、約100kHzより高い、請求項1に記載の方法。
- 前記加工レーザ出力が、UVレーザ、可視域レーザ、又はIRレーザによって放射される波長、或いは高調波の波長を含む請求項1に記載の方法。
- 少なくとも幾つかの前記加工レーザ出力が、少なくとも2つのレーザパルスを含む請求項1に記載の方法。
- 前記加工レーザ出力の前記波面歪曲が、前記ターゲットのビームスポットサイズに変動を生じる請求項1に記載の方法。
- RFパルス間隔が、あるRFパワー値で連続的なRFパワーを有するタイミングウィンドウを規定し、前記加工レーザ出力が比較的低いパワー値を有し、前記加工レーザ出力が、前記比較的低いパワー値より高いパワー値で前記ターゲットの方向に伝搬するように、前記RFパワー値の供給が、前記RFパワー値より小さいパワー値の前記RFパルスの供給を含む請求項1に記載の方法。
- 加工レーザ出力を発生させるレーザベースのワークピース処理システムであり、前記加工レーザ出力が半導体ウェハ上に設けられた選択電導リンクを照射するように、ワークピースに対する前記加工レーザ出力のターゲット調整を制御する位置決めシステムを備え、制御コマンドに応じて、前記加工レーザ出力の状態でワークピースの電導リンクの方向にレーザ出力が伝搬することを可能とする出力伝送状態と、ワークピース方向に前記加工レーザ出力が伝搬することを主として防止する出力遮断状態とを生じる外部共振型光学変調器を備えており、連続した出力伝送状態間の非等間隔の結果として、動作中に前記加工レーザ出力の不所望な波面歪曲を生じさせる熱負荷変動の状態を、前記外部共振型光学変調器に生じさせる前記レーザベースのワークピース処理システムにおいて、前記加工レーザ出力の前記熱負荷変動及び前記不所望な波面歪曲を低減する方法であって、
相互に隣接したレーザ出力の1つずつが、ほぼ均一のレーザ出力間隔で互いに分離しており、ほぼ一定のレーザ出力繰返し率で、一連のレーザ出力を発生させるステップと、
相互に隣接した出力伝送状態の1つずつが、所定の動作許容範囲内に前記外部共振型光学変調器の熱負荷変動を維持するように、ほぼ均一のRFパルス間隔で互いに分離しており、RFパルス繰返し率で、一連の出力伝送状態を生成するように、RFパルスを前記外部共振型光学変調器に供給するステップと、
前記ワークピースの選択された電導リンクを処理するために、前記ワークピースに対する前記位置決めシステムの前記ターゲット調整を操作するステップと、
前記位置決めシステムが選択された電導リンクを処理しないときはいつも、加工レーザ出力が前記ワークピースを損傷させることを防止するための時間不一致RFパルスの期間に、前記出力伝送状態と対応するレーザ出力とを時間一致しないように、前記RFパルスの供給及び前記レーザ出力の発生をタイミング調整するステップと、
種々の加工レーザ出力間隔で電導リンクの照射を行うために、加工レーザ出力を伝送するための時間一致RFパルスの期間に、前記出力伝送状態と対応するレーザ出力とを時間一致させるように、前記RFパルスの供給及び前記レーザ出力の発生をタイミング調整するステップとを含む方法。 - 前記レーザ出力繰返し率が、約30kHzより高い、請求項19に記載の方法。
- 前記位置決めシステムが、RFパルスの間に、単一の電導リンクのみを処理する請求項20に記載の方法。
- RFパルスが、RFパワー値とRF持続時間を有し、加工レーザ出力が、パワー値を有し、
対応する変更を前記加工レーザ出力の前記パワー値に生じさせるために、時間一致のRFパルスの前記RFパワー値を変更するステップを更に含む請求項20に記載の方法。 - 前記RFパワー値と前記RF持続時間との積が、前記RFパルスの前記RFパワー値を変更することに応じて、ほぼ一定を保つ請求項3または22に記載の方法。
- それぞれの時間一致RFパルスによって生じた継続した加工レーザ出力が、異なるパワー値を有する請求項23に記載の方法。
- 時間一致RFパルスの前記RFパワー値が、時間不一致の連続したRFパルスのRFパワー値より小さく、時間一致及び時間不一致の連続したRFパルスが、ほぼ同一のRF持続時間を有し、
時間一致及び追加の時間不一致RFパルスのそれぞれについて、RFパワー値及びRF持続期間のそれぞれの積の和が、前記時間不一致RFパルスのRFパワー値とRF持続期間との積とほぼ等しくなるように、前記加工レーザ出力に対する隣接したレーザパルス間隔の間に、少なくとも1つの前記追加の時間不一致RFパルスを挿入するステップを更に含む請求項2または22に記載の方法。 - 前記加工レーザ出力が、0次レーザ出力を含む請求項1または19に記載の方法。
- 前記加工レーザ出力が、1次レーザ出力を含む請求項1または19に記載の方法。
- 前記RFパルスが、隣接するレーザ出力間隔の約30%より短いRF持続時間を含む請求項1または20に記載の方法。
- 前記RFパルスが、約0.1マイクロ秒より長いRF持続時間を含む請求項29に記載の方法。
- 時間不一致RFパルスが、約0.2マイクロ秒より長い遅延時間だけ、それぞれのレーザ出
力の開始からオフセットされる請求項1または20に記載の方法。 - ビーム位置精度が、0.005 mrad以内に維持される請求項1または20に記載の方法。
- 前記熱負荷変動が、5%以内に維持される請求項1または20に記載の方法。
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US10/611,798 US6947454B2 (en) | 2003-06-30 | 2003-06-30 | Laser pulse picking employing controlled AOM loading |
PCT/US2004/014013 WO2005006422A1 (en) | 2003-06-30 | 2004-05-05 | Laser pulse picking employing controlled aom loading |
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CA (1) | CA2530688A1 (ja) |
DE (1) | DE112004001190T5 (ja) |
GB (1) | GB2420004B (ja) |
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KR100809583B1 (ko) * | 2006-06-02 | 2008-03-06 | 주식회사 한광옵토 | 레이저 패턴 가공장치 |
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KR20090104001A (ko) * | 2007-01-05 | 2009-10-05 | 지에스아이 그룹 코포레이션 | 멀티 펄스 레이저 처리 시스템 및 방법 |
JP2008207210A (ja) * | 2007-02-26 | 2008-09-11 | Disco Abrasive Syst Ltd | レーザー光線照射装置およびレーザー加工機 |
US8278595B2 (en) * | 2007-03-16 | 2012-10-02 | Electro Scientific Industries, Inc. | Use of predictive pulse triggering to improve accuracy in link processing |
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- 2004-05-05 WO PCT/US2004/014013 patent/WO2005006422A1/en active Application Filing
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- 2004-05-05 GB GB0601470A patent/GB2420004B/en not_active Expired - Fee Related
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- 2004-05-05 DE DE112004001190T patent/DE112004001190T5/de not_active Ceased
- 2004-05-10 TW TW093113052A patent/TWI348799B/zh not_active IP Right Cessation
- 2004-11-29 US US11/000,333 patent/US20050224469A1/en not_active Abandoned
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US20040264517A1 (en) | 2004-12-30 |
US20050224469A1 (en) | 2005-10-13 |
TW200505117A (en) | 2005-02-01 |
KR101123231B1 (ko) | 2012-03-20 |
TWI348799B (en) | 2011-09-11 |
CN1813339A (zh) | 2006-08-02 |
GB2420004A (en) | 2006-05-10 |
WO2005006422A1 (en) | 2005-01-20 |
KR20060034652A (ko) | 2006-04-24 |
GB2420004B (en) | 2007-01-03 |
GB0601470D0 (en) | 2006-03-08 |
US6947454B2 (en) | 2005-09-20 |
JP2007527608A (ja) | 2007-09-27 |
DE112004001190T5 (de) | 2006-05-11 |
CN1813339B (zh) | 2010-10-13 |
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