JP2017163140A - 発光素子 - Google Patents
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- JP2017163140A JP2017163140A JP2017038861A JP2017038861A JP2017163140A JP 2017163140 A JP2017163140 A JP 2017163140A JP 2017038861 A JP2017038861 A JP 2017038861A JP 2017038861 A JP2017038861 A JP 2017038861A JP 2017163140 A JP2017163140 A JP 2017163140A
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Abstract
Description
表1は、異なる順方向電流の場合の発光素子の放射のファーフィールド角を示している。光束の発散度を明確に説明するために、本開示内容のファーフィールド角は半ビーム幅の発散角である。
表1から分かるように、順方向電流がレーザ閾値電流Ithよりも高く、且つ飽和電流Isatよりも低い場合、放射のファーフィールド角は15度よりも小さく、好ましくは、5度〜15度であり、より好ましくは、5度〜13度である。
1つの態様では、放射は約850±10ナノメートルのピーク波長を有する。1つの態様では、放射は約940±10ナノメートルのピーク波長を有する。
表3は、異なる順方向電流の場合の第7実施例の発光素子の放射のファーフィールド角を示し、放射は約940±10ナノメートルのピーク波長を有する。本実施例では、レーザ閾値電流Ithは約13ミリアンペアであり、飽和電流Isatは約80ミリアンペアである。
表2及び表3に示すように、順方向電流がレーザ閾値電流Ithよりも高く、且つ飽和電流Isatよりも低い場合、放射のファーフィールド角は15度よりも小さく、好ましくは、5度〜15度であり、より好ましくは、8度〜13度である。
20 エピタキシャル構造
30 電流ブロック層
40 第1電極
50 第2電極
60 導電層
21 第1DBRスタック
31 第1開口
22 発光スタック
23 第2DBRスタック
24 コンタクト層
25 第2開口
W1 第1最大幅
W2 第2最大幅
R 放射
41 ワイヤボンディング部
42 電流注入部
43 ブリッジング部
I 放射放出領域
26 突出部
261 台部側壁
301 内部
302 外部
W3 第3幅
W4 第4幅
W5 第5幅
W3’ 第3幅
Ith レーザ閾値電流
110 パッシベーション層
111 開孔
90 永久基板
100 接着層
70 一時的な基板
44 第1延在電極
45 第2延在電極
46 第3延在電極
241 コンタクト領域
Isat 飽和電流Isat
Claims (10)
- 放射を放出可能な発光素子であって、
基板と、
前記基板の上に位置し、第1DBRスタック、発光スタック、第2DBRスタック及びコンタクト層を順次含むエピタキシャル構造と、
電極と、
前記コンタクト層と前記電極との間に位置する電流ブロック層と、
前記電流ブロック層の中に形成された第1開口と、
前記電極の中に形成され、且つ前記第1開口の内に位置する第2開口と、を含み、
前記電極の一部は、前記第1開口の中に埋め込まれ、且つ前記コンタクト層と接触し、
前記発光素子は、前記第2DBRスタックにおいて、酸化層及びイオン注入層を有しない、発光素子。 - 前記第2DBRスタックの前記第1開口の直下に位置する部分の導電率は、前記第2DBRスタックの前記電流ブロック層により覆われている他部の導電率に略等しい、請求項1に記載の発光素子。
- 前記発光素子は、順方向電圧、レーザ閾値電流、及び前記レーザ閾値電流よりも大きい飽和電流を有し、
発光素子は前記順方向電圧よりも大きい動作電圧において順方向電流を伝導し、前記順方向電流が前記レーザ閾値電流と前記飽和電流との間のものである場合、前記放射は15度よりも小さいファーフィールド角を有するコヒーレント光である、請求項1に記載の発光素子。 - 前記第2DBRスタックの各層は、III−V族半導体材料からなるものである、請求項1に記載の発光素子。
- 発光素子であって、
基板と、
第1DBRスタック、発光スタック、第2DBRスタック及びコンタクト層を順次含むエピタキシャル構造と、を含み、
前記発光素子は、順方向電圧、レーザ閾値電流、及び前記レーザ閾値電流よりも大きい飽和電流を有し、
発光素子は前記順方向電圧よりも大きい動作電圧において順方向電流を伝導し、前記順方向電流が前記レーザ閾値電流と前記飽和電流との間のものである場合、前記発光素子は15度よりも小さいファーフィールド角を有するコヒーレント光を放出し、前記順方向電流が前記レーザ閾値電流よりも小さい場合、前記発光素子は非コヒーレント光を放出する、発光素子。 - 前記コンタクト層は第3幅を有し、前記第2DBRスタックは前記第3幅よりも大きい第2幅を有し、前記発光素子は、前記コンタクト層を覆う導電層をさらに含む、請求項5に記載の発光素子。
- 前記導電層の上に位置する第1電極をさらに含み、
前記第1電極は、前記導電層を露出させる開口を有する、請求項6に記載の発光素子。 - 前記開口は最大幅を有し、前記第3幅と前記最大幅との比は0.1〜3である、請求項7に記載の発光素子。
- 前記発光素子は、前記第2DBRスタックにおいて、酸化層及びイオン注入層を有しない、請求項5に記載の発光素子。
- 前記第2DBRスタックの前記コンタクト層の直下に位置する部分の導電率は、前記第2DBRスタックの前記コンタクト層により覆われていない他部の導電率に略等しい、請求項5に記載の発光素子。
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| KR102336974B1 (ko) | 2021-12-08 |
| TWI734750B (zh) | 2021-08-01 |
| JP7068772B2 (ja) | 2022-05-17 |
| DE102017012567B4 (de) | 2026-01-29 |
| TW202322503A (zh) | 2023-06-01 |
| US10090643B2 (en) | 2018-10-02 |
| CN107171180A (zh) | 2017-09-15 |
| KR20170104401A (ko) | 2017-09-15 |
| JP7797569B2 (ja) | 2026-01-13 |
| US10511140B2 (en) | 2019-12-17 |
| CN118712879A (zh) | 2024-09-27 |
| TWI847513B (zh) | 2024-07-01 |
| US20180048119A1 (en) | 2018-02-15 |
| US20170256914A1 (en) | 2017-09-07 |
| TW202437627A (zh) | 2024-09-16 |
| US9837792B2 (en) | 2017-12-05 |
| US20180358780A1 (en) | 2018-12-13 |
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| JP2024100918A (ja) | 2024-07-26 |
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