JP2009541989A - 垂直型発光素子及びその製造方法 - Google Patents
垂直型発光素子及びその製造方法 Download PDFInfo
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Abstract
Description
したがって、本発明が種々の変更および変形を許容するとしても、特定の実施例を図示するとともに詳細に説明する。しかしながら、本発明は、開示した特定の形態に限定されるものではなく、特許請求の範囲で規定されるような本発明の範囲内にある全ての変形、等価物および変更をカバーする。
Claims (33)
- 基板上に半導体層を形成する段階と、
前記半導体層上に第1電極を形成する段階と、
前記第1電極上に支持層を形成する段階と、
前記基板と前記半導体層との間の界面に弾性応力波を発生させることで、前記基板を前記半導体層から分離する段階と、
前記基板が分離して露出された半導体層上に第2電極を形成する段階と、
を含んで構成されることを特徴とする垂直型発光素子の製造方法。 - 前記半導体層を形成する段階と第1電極を形成する段階との間には、前記半導体層のチップ分離領域をエッチングしてトレンチを形成する段階をさらに含むことを特徴とする請求項1に記載の垂直型発光素子の製造方法。
- 前記第1電極を形成する段階では、前記第1電極をNi、W、Ti、Pt、Au、PdCu、Al、Cr、Agまたはこれらの任意の組合せの合金によって形成することを特徴とする請求項1に記載の垂直型発光素子の製造方法。
- 前記第1電極を形成する段階は、
透明電極を形成する段階と、
前記透明電極上に反射型電極を形成する段階と、を含んで構成されることを特徴とする請求項1に記載の垂直型発光素子の製造方法。 - 複数の半導体層と、
前記半導体層の第1面上に位置する第1電極と、
前記第1電極の少なくとも一部と前記半導体層の少なくとも一面に位置するパッシベーション層と、
前記第1電極とパッシベーション層の一部または全体上に位置する少なくとも一層以上の結合金属と、
前記半導体層の第2面上に形成される第2電極と、
前記第1電極上に位置する支持層と、を含んで構成されることを特徴とする垂直型発光素子。 - 前記パッシベーション層と接続金属層との間に金属層が位置することを特徴とする請求項5に記載の垂直型発光素子。
- 複数の半導体層は、
n-型半導体層と、
前記n-型半導体層上に位置する活性層と、
前記活性層上に位置するp-型半導体層と、を含んで構成されることを特徴とする請求項5に記載の垂直型発光素子。 - 前記p-型半導体層上には、InGaN層またはInGaN/GaN超格子層からなる電流拡散層をさらに含むことを特徴とする請求項5に記載の垂直型発光素子。
- 前記第1電極は、
前記半導体層と電気的に接続される第1金属層と、
前記第1金属層上に位置する拡散防止層と、
前記拡散防止層上に位置する第2金属層と、を含んで構成されることを特徴とする請求項5に記載の垂直型発光素子。 - 前記第1金属層、拡散防止層及び第2金属層は、一つの合金層で形成されることを特徴とする請求項9に記載の垂直型発光素子。
- 前記第1電極は、
前記半導体層と電気的に連結される透明導電酸化膜(透明電極)と、
前記透明導電酸化膜(透明電極)上に形成された反射型電極と、を含んで構成されることを特徴とする請求項5に記載の垂直型発光素子。 - 前記反射型電極は、AgまたはAlで形成されることを特徴とする請求項11に記載の垂直型発光素子。
- 前記反射型電極の厚さは、100Åを超えることを特徴とする請求項11に記載の垂直型発光素子。
- 前記反射型電極は、
前記半導体層と電気的に接続される第1金属層と、
前記第1金属層上に位置する拡散防止層と、
前記拡散防止層上に位置する第2金属層と、を含んで構成されることを特徴とする請求項11に記載の垂直型発光素子。 - 前記第1金属層、拡散防止層及び第2金属層は、一つの合金層で形成されることを特徴とする請求項14に記載の垂直型発光素子。
- 前記結合金属は、
前記第1電極と電気的に接続される第1金属層と、
前記第1金属層上に位置する拡散防止層と、
前記拡散防止層上に位置する第2金属層と、を含んで構成されることを特徴とする請求項5に記載の垂直型発光素子。 - 前記第1金属層、拡散防止層及び第2金属層は、一つの合金層で形成されることを特徴とする請求項16に記載の垂直型発光素子。
- 前記第1電極は、透明電極であることを特徴とする請求項5に記載の垂直型発光素子。
- 前記半導体層の第2面には、光抽出構造が形成されることを特徴とする請求項5に記載の垂直型発光素子。
- 前記光抽出構造は、光結晶パターンであることを特徴とする請求項19に記載の垂直型発光素子。
- 前記光結晶パターンの周期は、0.2〜2μmであることを特徴とする請求項20に記載の垂直型発光素子。
- 前記パターンは、
6角(60度)または12角(30度)回転対称を有する複数のホールパターンであることを特徴とする請求項20に記載の垂直型発光素子。 - 前記ホールパターンは、19個のホールからなる単位セルをなしており、前記19個のうち6個を隣接単位セルで共有するホールパターンであることを特徴とする請求項22に記載の垂直型発光素子。
- 前記単位セルをなす19個のホールは、中央に1個、その周辺に6個の総7個が互いに同一間隔をなしており、前記7個の外郭には、互いに同一間隔で12個のホールが配置されることを特徴とする請求項23に記載の垂直型発光素子。
- 前記パターンは、並進対称性を有することを特徴とする請求項20に記載の垂直型発光素子。
- 前記第1電極に接触して前記半導体層を支持し、前記半導体層の側面を支持する縁部が形成される支持層をさらに含んで構成されることを特徴とする請求項5に記載の垂直型発光素子。
- 前記パッシベーション層は、シリコン酸化物、フォトレジスト、SOG及びポリイミドのうちの少なくとも一つによって形成されることを特徴とする請求項5に記載の垂直型発光素子。
- 複数の半導体層と、
前記半導体層の第1面上に位置し、少なくとも二層以上から構成される第1電極と、
前記半導体層の第2面の少なくとも一部分に形成される光抽出構造と、
前記半導体層の第2面に位置する第2電極と、
前記第1電極上に位置する支持層と、を含んで構成されることを特徴とする垂直型発光素子。 - 前記半導体層の第1面と前記第1電極との間に拡散防止層をさらに含むことを特徴とする請求項28に記載の垂直型発光素子。
- 前記光抽出構造は、多数のホールパターンを有する光結晶構造であり、前記光結晶の周期をAとしたとき、前記ホールの直径が0.1A〜0.9Aで、前記ホールの深さが0.1μmから前記複数の半導体層の第2面に位置する半導体層の厚さであることを特徴とする請求項28に記載の垂直型発光素子。
- 複数の半導体層と、
前記半導体層の第1面上に位置する透明導電酸化膜(TCO)と、
前記透明導電酸化膜上に位置する反射電極と、
前記反射電極上に位置する支持層と、
前記半導体層の第2面上に位置する第2電極と、を含んで構成されることを特徴とする垂直型発光素子。 - 前記半導体層と透明導電酸化膜との間にInGaN層またはInGaN/GaN超格子層からなる電流拡散層をさらに含むことを特徴とする請求項31に記載の垂直型発光素子。
- 複数の半導体層と、
前記半導体層の少なくとも一面以上に位置するパッシベーション層と、
前記半導体層とパッシベーション層の一部または全体上に位置し、前記半導体層とオーミック接触するオーミック電極およびシード金属層または金属もしくは半導体の結合のための層である接続金属層と一体に形成された第1電極と、
前記半導体層の第2面上に形成される第2電極と、
前記第1電極上に位置する支持層と、を含んで構成されることを特徴とする垂直型発光素子。
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CN101485000B (zh) | 2012-01-11 |
US20110003416A1 (en) | 2011-01-06 |
EP2458652A1 (en) | 2012-05-30 |
US20080023691A1 (en) | 2008-01-31 |
WO2007148866A1 (en) | 2007-12-27 |
US7768025B2 (en) | 2010-08-03 |
EP2041802B1 (en) | 2013-11-13 |
KR101113878B1 (ko) | 2012-03-09 |
US20140091277A1 (en) | 2014-04-03 |
TW200802968A (en) | 2008-01-01 |
EP2458653B1 (en) | 2023-08-30 |
EP2041802A1 (en) | 2009-04-01 |
EP2458652B1 (en) | 2023-08-02 |
CN102361052A (zh) | 2012-02-22 |
US8624288B2 (en) | 2014-01-07 |
US20170084789A1 (en) | 2017-03-23 |
TWI455345B (zh) | 2014-10-01 |
US20120018700A1 (en) | 2012-01-26 |
CN101485000A (zh) | 2009-07-15 |
US20070295952A1 (en) | 2007-12-27 |
US8039281B2 (en) | 2011-10-18 |
EP2041802A4 (en) | 2010-03-10 |
EP2458653A1 (en) | 2012-05-30 |
US7834374B2 (en) | 2010-11-16 |
CN102361052B (zh) | 2015-09-30 |
JP5091233B2 (ja) | 2012-12-05 |
KR20090012268A (ko) | 2009-02-02 |
US9530936B2 (en) | 2016-12-27 |
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