JP2007503125A - 特別形態のパワープロファイルでレーザパルスを用いるリンク処理の方法及びレーザシステム。 - Google Patents
特別形態のパワープロファイルでレーザパルスを用いるリンク処理の方法及びレーザシステム。 Download PDFInfo
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
- B23K26/0608—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams in the same heat affected zone [HAZ]
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
- B23K26/0613—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams having a common axis
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- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- H—ELECTRICITY
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Abstract
Description
本出願は、2003年8月19日に出願された米国特許仮出願第60/496,631の利点を要求する。
本特許出願の開示部分は、著作権者(c2004)Electro Scientific Industries, Inc.による著作権保護の対象となる部分を含んでいる。著作権者は、米国特許商標庁のファイル又は記録に現れるときには、特許書面又は特許の開示のいずれによっても複製権の対象とならないが、その他の全てについての著作権の権利を保有する。37 CFR § 1.71(d)。
Claims (33)
- 各選択したリンク構造部は、対抗する側面と、上面と、底面とを有するリンクを有し、前記対抗する側面は、リンク幅を規定する距離だけ離されており、少なくとも前記側面と前記底面は、基板上に構成される回路に、隣接する不動態化構造部を配置しており、冗長メモリ又は集積回路の選択した導電リンク構造部から、目標部材を除去するレーザ処理方法であって、
レーザスポット及びレーザパルス時間的パワープロファイルによって特徴付けられるレーザ出力パルスを、選択したリンク構造部の照射点に方向付けし、
前記レーザスポットが、前記選択したリンク構造部のレーザスポット位置でのスポットサイズを有し、前記スポットサイズが、前記リンク幅より大きく、
前記レーザパルス時間的パワープロファイルが、立ち上りエッジ部と、立ち下りエッジ部と、平均パワーと、パルス持続時間とを有し、パワースパイクによって特徴付けられており、前記パワースパイクが、前記パルス持続時間より実質的に短いスパイク持続時間と、前記レーザ出力パルスの平均電力より大きいピークパワーと、前記立ち上りエッジ部から前記立ち下りエッジ部までの発生の時間とを有し、前記ピークパワーと、前記スパイク持続時間と、前記パワースパイクの発生の時間とが、前記レーザ出力パルスのために、前記基板又は隣接する前記側面及び前記底面に配置する前記不動態化構造部にほぼダメージを生じることなく、前記選択したリンク構造部の切断をもたらす特別形態のレーザパルス・パワープロファイルを確立するように協働させる方法。 - 前記パルス持続時間が、約40nsより短い、請求項1に記載のレーザ処理方法。
- 前記パワースパイクが、前記レーザパルスパワープルファイルの前記立ち上りエッジ部と時間一致であり、前記レーザ出力パルスの前記平均パワーに対し約10%より大きいピークパワー値を有する、請求項1に記載のレーザ処理方法。
- 前記パワースパイクが、立ち上り時間を有し、前記立ち上り時間が、約5nsより短い、請求項3に記載のレーザ処理方法。
- 前記立ち上り時間が、約2nsより短い、請求項4に記載のレーザ処理方法。
- 前記スパイク持続時間が、約1nsと、前記レーザパルス時間的パワープロファイルの前記パルス持続時間の約50%との間にある、請求項3に記載のレーザ処理方法。
- 前記パワースパイクの前記発生後の前記レーザパルス時間的パワープロファイルが、前記立ち下りエッジ部の前の時間でほぼ線形に降下するように特別形態化される、請求項3に記載のレーザ処理方法。
- 前記パワースパイクの前記発生後の全パワーが、前記レーザ出力パルスの前記平均電力の約10%よりも大きい、請求項7に記載のレーザ処理方法。
- 前記パワースパイクの前記発生後の前記レーザパルス時間的パワープロファイルが、前記レーザパルス時間的パワープロファイルの前記立ち下りエッジ部の前で、比較的平坦である、請求項3に記載のレーザ処理方法。
- 前記レーザパルス時間的パワープロファイルが、追加のパワースパイクを含み、前記追加のパワースパイクが、前記レーザパルス時間的パワープロファイルの前記立ち上りエッジ部と時間一致である前記パワースパイク後に生じる、請求項3に記載のレーザ処理方法。
- 前記追加のパワースパイクが、前記平均パワーの5%より大きいパワー値と、約1nsと前記レーザパルス時間的パワープロファイルの前記パルス持続時間の約30%との間のスパイク持続時間とを有する、請求項10に記載のレーザ処理方法。
- 前記パワースパイクが、前記レーザ出力パルスの前記平均パワーの約10%を超える電力変化量で発振波形の形状内にある、請求項1に記載のレーザ処理方法。
- 前記発振波形が、前記レーザパルス時間的パワープロファイルの前記パルス持続時間内で2分の1サイクルから3倍サイクルの発振サイクルで生じており、前記発振サイクルの期間が約1nsと約15nsとの間にある、請求項12に記載のレーザ処理方法。
- 前記パワースパイクが、前記立ち上りエッジ部から前記レーザパルス時間的パワープロファイルの前記パルス持続時間の70%まで調整された間隔内の時間で生じる、請求項1に記載のレーザ処理方法。
- 前記パワースパイク前後の前記レーザパルス時間的パワープロファイルが、比較的平坦である、請求項14に記載のレーザ処理方法。
- 前記パワースパイク前後の前記レーザパルス時間的パワープロファイルが、平坦でない、請求項14に記載のレーザ処理方法。
- 前記パワースパイクが、前記レーザ出力パルスの前記平均パワーの10%を超えるピークパワーを有し、1nsと前記レーザパルス時間的パワープロファイルの50%との間となるスパイク持続時間を有する、請求項14に記載のレーザ処理方法。
- 前記隣接する不動態化構造部が、上部不動態化層を形成するために前記導電リンクの上部に配置している、請求項1に記載のレーザ処理方法。
- 前記隣接する不動態化構造部が、前記導電リンクの上部に配置しないように構成されている、請求項1に記載のレーザ処理方法。
- 前記レーザパルス時間的パワープロファイルの前記立ち下りエッジ部が、約10nsより短い持続時間を有するように特別形態化される、請求項1に記載のレーザ処理方法。
- 前記選択した導電リンクの構造部が、アルミニウムと、クロム化物と、銅と、ポリシリコンと、二ケイ化物と、金と、ニッケルと、ニッケルクロムと、プラチナと、ポリサイドと、窒化タンタルと、チタンと、窒化チタンと、タングステンと、又は、ケイ化タングステンとを含む、請求項1に記載のレーザ処理方法。
- 各レーザ出力パルスが、約0.001マイクロジュールと10マイクロジュールとの間のレーザエネルギーを有する、請求項1に記載のレーザ処理方法。
- 前記隣接する不動態化構造部、又は、下部不動態化層、或いは、前記隣接する不動態化構造部と前記下部不動態化層の双方が、SiO2、Si3N4、SiON、低K誘電率材料、低K誘電部材、低K酸化物ベースの誘電部材、オーソシリケート・ガラス、フルオロシリケート・ガラス、有機シリケート・ガラス、オルトケイ酸テトラエチルベースの酸化物、メチルトリエトキオルトケイ酸、プロピレン・グリコール・モノメチルエーテル酢酸塩、ケイ酸エステル、ハイドロゲン・シルセスキオクサン、メチル・シルセスキオクサン、ポリアリーレンエーテル、ベンゾシクロブテン、SiCOH又はSiCOH膜、又は、スピンオン材ベースの低K誘電重合体のうち、1つ以上を含む、請求項1に記載のレーザ処理方法。
- 少なくとも2つのレーザパルス出力が、約10kHzより大きい繰り返し率で、それぞれの導電リンク構造部の配置で構成される目標部材を除去するように発生させる、請求項1に記載のレーザ処理方法。
- 前記レーザ出力パルスが、約150nmから約2000nmまでのスペクトラム範囲の波長である、請求項1に記載のレーザ処理方法。
- 前記レーザ出力パルスの前記波長が、YAG、YLF、YVO4、サファイア、又は、ファイバレーザから放射される、基本波、第2高調波、第3高調波のうちのいずれか1つである、請求項25に記載のレーザ処理方法。
- 前記レーザ出力パルスが、約1.06μmの波長又は前記約1.06μmの波長の第2高調波又は前記約1.06μmの波長の第3高調波、或いは、約1.3μmの波長又は前記約1.3μmの第2高調波又は前記約1.3μmの波長の第3高調波、或いは、約1.5μmの波長又は前記約1.5μmの第2高調波又は前記約1.5μmの波長の第3高調波、でのファイバレーザによって放射される、請求項25に記載のレーザ処理方法。
- 前記レーザ出力パルスの前記波長が、1.54μm、1.3μm、1.1〜1.06μm、1.05μm、1.047m、1.03〜0.75μm、0.65μm、0.53μm、0.5μm、0.43μm、0.35μm、又は0.27μmの波長のうち、いずれか1つであるか、又は、いずれか1つ以内である、請求項1に記載のレーザ処理方法。
- 前記リンクが、1μmより大きい厚さを有する、請求項27に記載のレーザ処理方法。
- 前記リンクが、1μmより大きい厚さを有する、請求項1に記載のレーザ処理方法。
- 前記レーザ出力パルスが、波長によって特徴付けられており、前記隣接する不動態化構造部、又は、前記基板、又は、前記隣接する不動態化構造部と前記基板の双方が、前記波長に対し、高い吸収性を有する、請求項1に記載のレーザ処理方法。
- 前記波長が、UV域の波長を含む、請求項31に記載のレーザ処理方法。
- 前記リンクが、1μmより大きい厚さを有する、請求項32に記載のレーザ処理方法。
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