JP7069248B2 - ゲッター層を有する発光半導体デバイスを製造する方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 42
- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 claims description 107
- 229910052782 aluminium Inorganic materials 0.000 claims description 64
- 230000008021 deposition Effects 0.000 claims description 63
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 62
- 239000012535 impurity Substances 0.000 claims description 58
- 230000036961 partial effect Effects 0.000 claims description 53
- 229910052760 oxygen Inorganic materials 0.000 claims description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 31
- 239000001301 oxygen Substances 0.000 claims description 31
- 229910052717 sulfur Inorganic materials 0.000 claims description 27
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 23
- 239000011593 sulfur Substances 0.000 claims description 23
- 229910052785 arsenic Inorganic materials 0.000 claims description 21
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 19
- 229910052733 gallium Inorganic materials 0.000 claims description 14
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 11
- 230000007547 defect Effects 0.000 claims description 3
- 238000000151 deposition Methods 0.000 description 53
- 239000007789 gas Substances 0.000 description 16
- 230000008859 change Effects 0.000 description 12
- 239000002019 doping agent Substances 0.000 description 8
- 238000010348 incorporation Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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Description
基板を用意するステップと、
発光層構造を第1の成長条件で設けるステップと、
発光半導体デバイスの層構造内の不純物を減らすためのAlGaAsゲッター層を、第1の成長条件とは異なる第2の成長条件で設けるステップと
を有し、
第2の成長条件は、AlGaAsゲッター層内の第1の不純物濃度が、アルミニウムを含む発光層構造の層内の第2の不純物濃度と比較して、少なくとも50%高いように選定され、第1及び第2の成長条件は、砒素分圧、酸素分圧、堆積温度、総堆積圧力、及びアルミニウムの堆積速度からなる群から選択され、アルミニウム含有量が第1のアルミニウム含有量と該第1のアルミニウム含有量とは異なる第2のアルミニウム含有量との間を0.5%/nm未満で変化するサブレイヤを、AlGaAsゲッター層が有するように、AlGaAsゲッター層のアルミニウムの堆積速度が選定される。
110 第1の電極
120 基板
130 底部DBR
140 活性層
150 閉じ込め層
155 発光層構造
160 頂部DBR
170 第2の電極
190 AlGaAsゲッター層
380 従来技術のVCSEL構造のAlプロファイル
430 硫黄プロファイル
450 Alプロファイル
780 第1の実施形態に従ったVCSEL構造のAlプロファイル
880 第2の実施形態に従ったVCSEL構造のAlプロファイル
910 Al濃度
920 O濃度
930 S濃度
1010 基板を用意するステップ
1020 発光層構造を設けるステップ
1030 AlGaAsゲッター層を設けるステップ
Claims (8)
- 発光半導体デバイスを製造する方法であって、
基板を用意するステップと、
発光層構造を第1の成長条件で設けるステップと、
前記発光半導体デバイスの層構造内の不純物を減らすためのAlGaAsゲッター層を、前記第1の成長条件とは異なる第2の成長条件で設けるステップと
を有し、
前記第1及び第2の成長条件は、砒素分圧、酸素分圧、堆積温度、総堆積圧力、及びアルミニウムの堆積速度からなる群から選択され、
前記第2の成長条件は、前記AlGaAsゲッター層内の前記不純物の濃度である第1の不純物濃度が、アルミニウムを含む前記発光層構造の層内の前記不純物の濃度である第2の不純物濃度と比較して、少なくとも50%高いように選定され、
アルミニウム含有量が第1のアルミニウム含有量と該第1のアルミニウム含有量とは異なる第2のアルミニウム含有量との間を0.5%/nm未満で変化するサブレイヤを、前記AlGaAsゲッター層が有するように、前記AlGaAsゲッター層のアルミニウムの堆積速度が選定され、
前記AlGaAsゲッター層内の格子欠陥の数が、アルミニウムを含む前記発光層構造の層と比較して増加されるように、前記AlGaAsゲッター層の堆積中の砒素分圧が、ガリウム分圧の2倍と200倍との間の範囲のうちの少なくとも一部内で変化され、
前記AlGaAsゲッター層に組み入れられる不純物は硫黄である、
ことを特徴とする方法。 - 前記AlGaAsゲッター層は、前記基板と前記発光層構造内の活性層との間に配置される、請求項1に記載の方法。
- アルミニウムを含む前記発光層構造の層内のアルミニウム含有量が少なくとも0.5%/nmで変化するように、アルミニウムを含む前記発光層構造の層内のアルミニウムの堆積速度が選定される、請求項1又は2に記載の方法。
- 前記AlGaAsゲッター層内の酸素の濃度である第1の酸素濃度が、アルミニウムを含む前記発光層構造の層内の酸素の濃度である第2の酸素濃度と比較して、少なくとも50%高いように、前記AlGaAsゲッター層の堆積中の酸素分圧が増大される、請求項1乃至3のいずれかに記載の方法。
- 前記AlGaAsゲッター層の堆積中の堆積温度が、500℃と750℃との間の範囲のうちの少なくとも一部内で変化される、請求項1乃至4のいずれかに記載の方法。
- 前記AlGaAsゲッター層の堆積中の総圧が、50mbarと150mbarとの間の範囲のうちの少なくとも一部内で変化される、請求項1乃至5のいずれかに記載の方法。
- 前記AlGaAsゲッター層は少なくとも50nmの厚さを備える、請求項1乃至6のいずれかに記載の方法。
- 当該方法は、少なくとも第1及び第2のAlGaAsゲッター層を設けることを有し、前記第1及び第2のAlGaAsゲッター層に異なる不純物が組み入れられるように、前記第1及び第2のAlGaAsゲッター層の成長条件が異なる、請求項1乃至7のいずれかに記載の方法。
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000312026A (ja) | 1999-04-27 | 2000-11-07 | Showa Denko Kk | 赤外発光素子用エピタキシャル基板およびこれを用いた発光素子 |
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CN106030938B (zh) | 2020-05-19 |
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CN106030938A (zh) | 2016-10-12 |
WO2015128254A1 (en) | 2015-09-03 |
EP3111520A1 (en) | 2017-01-04 |
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EP3111520B1 (en) | 2020-07-08 |
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