JP2020038973A - 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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- JP2020038973A JP2020038973A JP2019187413A JP2019187413A JP2020038973A JP 2020038973 A JP2020038973 A JP 2020038973A JP 2019187413 A JP2019187413 A JP 2019187413A JP 2019187413 A JP2019187413 A JP 2019187413A JP 2020038973 A JP2020038973 A JP 2020038973A
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Abstract
Description
Claims (15)
- 固体材料の構造を再編成する方法であって、
エネルギーのパルスに固体材料をさらし、固体材料を漸進的に溶融し、溶融材料を形成するステップと、
溶融材料を再結晶化するステップと
を含む方法。 - 溶融材料を再結晶化するステップが、下にある層との界面の近くの溶融材料の場所から溶融材料の表面に溶融材料を漸進的に結晶化することを含む請求項1に記載の方法。
- 各エネルギーパルスが固体材料の一部を溶融し、第1のエネルギーパルスによって溶融した固体材料の一部を再凝固できるように、第1のエネルギーパルスの送出と、第1のエネルギーパルスの直後の第2のエネルギーパルスの送出との期間を選択する、請求項1に記載の方法。
- 溶融材料を漸進的に再結晶化するステップが、固体材料を通り進行する溶融フロントの方向と反対方向に溶融材料を通して結晶化フロントを進行させることにより、溶融材料から結晶固体を形成するエネルギーのパルスを溶融材料に送出することを含む請求項3に記載の方法。
- 太陽電池を形成する方法であって、
空間的に均一なレーザ光のパルスを使用して活性層を漸進的に溶融および再結晶化することにより、太陽電池の活性層に大きい結晶ドメインを形成するステップを含む方法。 - 均一に分配されたレーザ光の各パルスが活性層内で溶融フロントを延ばす、請求項5に記載の方法。
- 活性層が、p型ドープ半導体層、真性半導体層、およびn型ドープ半導体層を含む請求項5に記載の方法。
- メモリデバイスを形成する方法であって、
基板上に第1の導電層を形成するステップと、
基板上に半導体層を堆積させることと、
半導体層をエネルギーのパルスにさらすことにより半導体層を漸進的に溶融し、溶融半導体層を形成することと、
溶融半導体層を再結晶化することと
を含むプロセスによって基板上に多結晶または単結晶半導体層を形成するステップと、
基板上に第2の導電層を形成するステップと
を含む方法。 - エネルギーのパルスが半導体材料を通して溶融フロントを進行させる、請求項8に記載の方法。
- 入射パルスによって溶融した半導体材料の一部を再凝固するように選択された期間が、次のパルスから複数のレーザパルスの各入射パルスを分離する、請求項8に記載の方法。
- 複数のレーザパルスの各パルスが、隣接するパルスと少なくとも部分的に重なり合う、請求項10に記載の方法。
- フォトニックデバイスを形成する方法であって、
セラミック基板の上に化合物半導体層を形成するステップと、
化合物半導体層の方にエネルギーのパルスを誘導し、化合物半導体層を漸進的に溶融して溶融層を形成することと、
溶融層を結晶化して結晶化合物半導体層を形成することと
を含むプロセスによって化合物半導体層を結晶化するステップと
を含む方法。 - エネルギーのパルスを化合物半導体層の方に誘導するステップが、複数のレーザパルスを化合物半導体層の方に誘導することと、各パルスが化合物半導体層の一部を溶融するように選択されたエネルギーを有することと、化合物半導体層を通して溶融フロントを進行させることとを含む請求項12に記載の方法。
- 化合物半導体層が、少なくともn型ドープ層、p型ドープ層、および多量子井戸層を含む請求項13に記載の方法。
- 入射パルスが溶融する化合物半導体層の一部よりも小さい溶融層の一部を再凝固するように選択された期間が、エネルギーの各入射パルスを、エネルギーの次のパルスから分離する、請求項12に記載の方法。
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