JP2014088310A - 半導体用途のための結晶化処理 - Google Patents
半導体用途のための結晶化処理 Download PDFInfo
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- JP2014088310A JP2014088310A JP2013240886A JP2013240886A JP2014088310A JP 2014088310 A JP2014088310 A JP 2014088310A JP 2013240886 A JP2013240886 A JP 2013240886A JP 2013240886 A JP2013240886 A JP 2013240886A JP 2014088310 A JP2014088310 A JP 2014088310A
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Abstract
【解決手段】半導体層は気相堆積によって形成される。パルスレーザ溶融/再結晶化プロセスが半導体層を結晶層に変換するために実行される。レーザ又は他の電磁放射のパルスがパルス列1201〜120Nに形成され、処置ゾーンにわたって均一に分配され、連続する隣接した処置ゾーンがパルス列1201〜120Nにさらされて、堆積された材料を結晶材料に漸進的に変換する。
【選択図】図1B
Description
Claims (11)
- 第1の処置ゾーンを識別することと、
前記第1の処置ゾーンの表面を第1のレーザパルスにさらすことによって前記第1の処置ゾーンの溶融区域を形成することと、
前記第1の処置ゾーンを複数のレーザパルスにさらしながら前記第1の処置ゾーンの溶融区域を再結晶化することであって、前記複数のレーザパルスの各パルスは再結晶化区域の一部を溶融する、再結晶化することと、
前記第1の処置ゾーン近傍の第2の処置ゾーンを識別することと、
溶融区域の形成と、前記第2の処置ゾーンとの前記溶融区域の再結晶化を繰り返すこと
とを含む、基板処置方法。 - 各処置ゾーンの溶融区域を形成することがさらに、各処置ゾーンの前記表面を第2レーザパルスにさらすことを含む、請求項1に記載の方法。
- 前記第1のレーザパルスと前記第2のレーザパルスとの間の期間が、前記溶融区域の一部が再凝固するのに必要な時間より短い、請求項2に記載の方法。
- 前記第1のレーザパルスと前記第2のレーザパルスが同一の期間および強度を有する、請求項2に記載の方法。
- 前記複数のレーザパルスの各パルスが前記第1のレーザパルスと同一の期間および強度を有する、請求項1に記載の方法。
- 前記複数のレーザパルスの各パルスが前記第1のレーザパルスと異なる期間または強度を有する、請求項1に記載の方法。
- 前記第2の処置ゾーンと前記第1の処置ゾーンが境界を共有する、請求項1に記載の方法。
- 基板の処置ゾーンを識別することと、
第1の複数のレーザパルスを前記処置ゾーンに送出することであって、前記第1の複数のレーザパルスの各パルスが前記処置ゾーンの一部を溶融し、且つ前記第1の複数のレーザパルスの各パルス間の期間が、溶融した前記処置ゾーンの一部を凝固させる時間より短い、溶融することと、
第2の複数のレーザパルスを前記基板の処置ゾーンに送出することであって、前記第2の複数のレーザパルスの各パルスが前記処置ゾーンの一部を溶融し、且つ前記第2の複数のレーザパルスの各パルス間の期間が、溶融した前記処置ゾーンの一部を凝固させる時間より長い、溶融すること
を含む、基板処置方法。 - 前記第1の複数のレーザパルスの各パルスが、隣接するパルスと重なり合う、請求項8に記載の方法。
- 前記第1の複数のレーザパルスの各パルスと前記第1の複数のレーザパルスの隣接するパルスとの間の期間が同一であり、且つ、前記第2の複数のレーザパルスの各パルスと前記第2の複数のレーザパルスの隣接するパルスとの間の期間が同一である、請求項8に記載の方法。
- 前記第1の複数のレーザパルスの各パルスの強度と前記第2の複数のレーザパルスの各パルスの強度が同一である、請求項8に記載の方法。
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