JP2012114461A - 半導体発光素子 - Google Patents
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Abstract
【解決手段】p型電極32と、n型電極31と、p型電極32に接続され、複数のp型窒化物系III−V族化合物半導体からなるp型積層構造(16〜20)と、n型電極31に接続され、複数のn型窒化物系III−V族化合物半導体であるn型積層構造(11〜14)と、p型積層構造(16〜20)とn型積層構造(11〜14)との間に形成された窒化物系III−V族化合物半導体からなる活性層15とを備え、n型積層構造(11〜14)がSiを5x1017cm-3以上2x1019cm-3以下の濃度で含有し、厚さが0.3nm以上200nm以下のドープ層10と、ドープ層10よりも活性層15側に設けられた超格子層13とを含む。
【選択図】図11
Description
本発明の第1の実施の形態に係る半導体素子は、図1に示すように、n型GaN基板11上に、シリコン(Si)等のn型不純物がドープされたn型GaN層12が積層された積層基体(11,12)を基礎としている。なお、n型GaN層12は、例示であり、より、一般的には、InxGa1-x-yAlyN層等の他の窒化物系III−V族化合物半導体のn型単結晶層でも良い。n型GaN基板11は、{0001}面から<1-100>方向へのオフ角度Δθ1-100の絶対値、及び{0001}面から<11-20>方向へのオフ角度Δθ11-20の絶対値がそれぞれ,
本発明の第2の実施の形態に係る半導体素子は、図13に示すように、オフ角度Δθ1-100及びΔθ11-20が式(1)及び(2)の関係を満たすn型GaN基板11上に、n型GaN層12が積層された積層基体(11,12)を基礎としている点では、第1の実施の形態に係る半導体素子と同様であるが、第2の実施の形態に係る半導体素子では、この積層基体(11,12)上に、発光ダイオード(LED)の素子構造部が形成される。第1の実施の形態で説明したように、n型GaN層12は、例示であり、より、一般的には、InxGa1-x-yAlyN層等の他の窒化物系III−V族化合物半導体のn型単結晶層でも良いことは勿論である。
本発明の第3の実施の形態に係る半導体素子は、図15に示すように、オフ角度Δθ1-100及びΔθ11-20が式(1)及び(2)の関係を満たすn型GaN基板11上に、Siド−プGaN層からなるn型ドリフト層24、Mgド−プInxGa1-xN層からなるp型ベース層25、Siド−プ層からなるn型エミッタ層26が順に積層されてヘテロ接合バイポーラトランジスタ(HBT)を構成している。n型GaN基板11は、コレクタ層(コレクタコンタクト層)として機能する。
上記のように、本発明は第1〜第3の実施の形態によって記載したが、この開示の一部をなす論述及び図面は本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなろう。
11…n型GaN基板
12…n型GaN層
13…n型クラッド層
14…n型GaNガイド層
15…発光層(活性層)
16…p型GaN第1ガイド層
17…オーバーフロー防止層
18…p型GaN第2ガイド層
19…p型クラッド層
20…p型GaNコンタクト層
21…発光層(活性層)
24…n型ドリフト層
25…p型ベース層
26…n型エミッタ層
31…n側電極
32…p側電極
33…p側電極
41…絶縁膜
42…パッシベーション膜
43…コレクタ電極
44…ベース電極
45…エミッタ電極
50a,50b…溝部
51…フォトレジスト
61…GaN基板
62…ノンドープGaN層(第1の単結晶層)
63…ノンドープAlxGa1-xN層(第2の単結晶層)
64…二次元電子雲
65…n型ソース領域
66…n型ドレイン領域
71…ソース電極
72…ドレイン電極
73…ゲート電極(ショットキ・バリア・ゲート)
Claims (13)
- p型電極と、
n型電極と、
前記p型電極に接続され、複数のp型窒化物系III−V族化合物半導体からなるp型積層構造と、
前記n型電極に接続され、複数のn型窒化物系III−V族化合物半導体であるn型積層構造と、
前記p型積層構造と前記n型積層構造との間に形成された窒化物系III−V族化合物半導体からなる活性層と
を備え、前記n型積層構造が、Siを5x1017cm-3以上2x1019cm-3以下の濃度で含有し、厚さが0.3nm以上200nm以下のドープ層と、前記ドープ層よりも前記活性層側に設けられた超格子層とを含むことを特徴とする半導体発光素子。 - 前記ドープ層が、Siを1x1018cm-3以上2x1019cm-3以下の濃度で含有することを特徴とする請求項1に記載の半導体発光素子。
- 前記ドープ層が、Siを4x1018cm-3以上2x1019cm-3以下の濃度で含有することを特徴とする請求項2に記載の半導体発光素子。
- 前記ドープ層の厚さが、0.3nm以上150nm以下であることを特徴とする請求項1乃至3のいずれか1項に記載の半導体発光素子。
- 前記ドープ層の厚さが、5nm以上150nm以下であることを特徴とする請求項1乃至4のいずれか1項に記載の半導体発光素子。
- 前記ドープ層が、Siを含むGaN層であることを特徴とする請求項1乃至5のいずれか1項に記載の半導体発光素子。
- 前記超格子層が、アンドープ層を含む複数の層の積層体であることを特徴とする請求項1乃至6のいずれか1項に記載の半導体発光素子。
- 前記超格子層が、前記アンドープ層とn型不純物をドープされたGaN層を含む複数の層の積層体であることを特徴とする請求項7に記載の半導体発光素子。
- 前記積層体が、n型不純物を含有することを特徴とする請求項7に記載の半導体発光素子。
- 前記n型積層構造が、前記ドープ層と前記超格子層との間に形成されたn型GaN層を更に含むことを特徴とする請求項1乃至請求項8のいずれか1項に記載の半導体発光素子。
- 前記n型GaN層が、前記超格子層に接することを特徴とする請求項10に記載の半導体発光素子。
- 前記n型積層構造が、前記活性層と前記超格子層との間に形成され、前記活性層に接したn型GaN層を更に含むことを特徴とする請求項1乃至請求項11のいずれか1項に記載の半導体発光素子。
- 前記p型積層構造が、Mgが5×1018cm-3以上10×1018cm-3以下にドープされたp型GaN層を含むことを特徴とする請求項1乃至12のいずれか1項に記載の半導体発光素子。
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| Publication number | Publication date |
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| JP5050123B2 (ja) | 2012-10-17 |
| TWI287256B (en) | 2007-09-21 |
| JP5100900B2 (ja) | 2012-12-19 |
| EP1630878A3 (en) | 2011-05-04 |
| EP1630878B1 (en) | 2017-10-18 |
| JP2012064956A (ja) | 2012-03-29 |
| JP5514260B2 (ja) | 2014-06-04 |
| CN100449800C (zh) | 2009-01-07 |
| JP2012209561A (ja) | 2012-10-25 |
| US7531397B2 (en) | 2009-05-12 |
| CN1741296A (zh) | 2006-03-01 |
| KR20060050558A (ko) | 2006-05-19 |
| US7339255B2 (en) | 2008-03-04 |
| US20080113497A1 (en) | 2008-05-15 |
| EP1630878A2 (en) | 2006-03-01 |
| JP4892103B2 (ja) | 2012-03-07 |
| TW200620423A (en) | 2006-06-16 |
| JP2011124589A (ja) | 2011-06-23 |
| JP5717825B2 (ja) | 2015-05-13 |
| KR100813756B1 (ko) | 2008-03-13 |
| JP2014027315A (ja) | 2014-02-06 |
| US20060043419A1 (en) | 2006-03-02 |
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