JP6220252B2 - 発光ダイオード及びその製造方法 - Google Patents
発光ダイオード及びその製造方法 Download PDFInfo
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- JP6220252B2 JP6220252B2 JP2013256795A JP2013256795A JP6220252B2 JP 6220252 B2 JP6220252 B2 JP 6220252B2 JP 2013256795 A JP2013256795 A JP 2013256795A JP 2013256795 A JP2013256795 A JP 2013256795A JP 6220252 B2 JP6220252 B2 JP 6220252B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000758 substrate Substances 0.000 claims description 149
- 239000004065 semiconductor Substances 0.000 claims description 91
- 238000000034 method Methods 0.000 claims description 41
- 238000007747 plating Methods 0.000 claims description 12
- 150000004767 nitrides Chemical class 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 123
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 239000012790 adhesive layer Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 229910052594 sapphire Inorganic materials 0.000 description 5
- 239000010980 sapphire Substances 0.000 description 5
- 229910002601 GaN Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910018575 Al—Ti Inorganic materials 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003685 thermal hair damage Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910001252 Pd alloy Inorganic materials 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 229910000629 Rh alloy Inorganic materials 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910020776 SixNy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Description
50 第1電極パッド
60 透明電極層
80 導電性基板
100 半導体積層構造体
110 第1半導体層
120 活性層
130 第2半導体層
150 第2電極パッド
180 基板
200 レーザー溝
250 延長パッド
600 反射層
Claims (36)
- 基板上に第1半導体層、活性層、第2半導体層を含む半導体積層構造体と、
前記半導体積層構造体上に形成される導電性基板と、
前記導電性基板上にオーミックコンタクトされて形成される電極と、を備え、
前記電極は、
前記電極及び前記導電性基板にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を備え、
前記電極は、
ワイヤーボンディングされる電極パッドと、
前記電極パッドで拡張形成される延長パッドと、を含み、
前記レーザー溝が少なくとも前記延長パッドに形成される発光ダイオード。 - 前記レーザー溝は、前記電極パッドには形成されない、請求項1に記載の発光ダイオード。
- 前記レーザー溝は、前記電極パッド及び前記延長パッドに形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記レーザー溝は、前記電極パッド上に複数の平行なグルーブ状に形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記レーザー溝は、前記電極パッド上にリング状に形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記レーザー溝は、前記電極パッド上に所定間隔で整列された点状に形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記レーザー溝は、前記延長パッドに不連続的な点線状に形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記レーザー溝は、前記延長パッドに複数の円状に形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記電極パッド上に前記レーザー溝を満たすメッキ層をさらに含むことを特徴とする請求項1に記載の発光ダイオード。
- 前記導電性基板は、窒化物基板に不純物がドーピングされた基板であることを特徴とする請求項1に記載の発光ダイオード。
- 前記レーザー溝は、断面がV字形グルーブ状に形成されることを特徴とする請求項1に記載の発光ダイオード。
- 前記電極パッドと前記導電性基板との間に反射層をさらに含むことを特徴とする請求項1に記載の発光ダイオード。
- 前記反射層は、互いに屈折率の異なる複数の層で形成されることを特徴とする請求項12に記載の発光ダイオード。
- 前記反射層は、複数のリングパターンに配され、その表面に粗度が形成され、前記電極パッドが前記導電性基板に把持されることを特徴とする請求項12に記載の発光ダイオード。
- 前記電極パッドと前記第2半導体層との間に介在され、互いに屈折率の異なる複数の層で形成される反射層と、
前記第2半導体層上に配される透明電極層と、をさらに含むことを特徴とする請求項1に記載の発光ダイオード。 - 前記透明電極層は、前記反射層をカバーし、前記電極パッドと前記第2半導体層との間に配されることを特徴とする請求項15に記載の発光ダイオード。
- 前記透明電極層は、前記反射層によって露出された第2半導体層上に配されることを特徴とする請求項16に記載の発光ダイオード。
- 前記電極パッドは、n型電極パッドまたはp型電極パッドで形成されることを特徴とする請求項1に記載の発光ダイオード。
- 基板上に第1半導体層、活性層、第2半導体層を含む半導体積層構造体と、
前記半導体積層構造体上に形成される導電性基板と、
前記導電性基板上にオーミックコンタクトされて形成される電極と、
前記電極と前記導電性基板との間に介在され、前記電極から露出した部分を有する反射層と、を備え、
前記電極は、
前記電極及び前記導電性基板にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を含み、
前記レーザー溝は、前記反射層が設けられていない位置で、前記電極から前記導電性基板の一部まで貫通する
発光ダイオード。 - 前記反射層は、複数のリングパターンに配され、前記電極が前記導電性基板に把持されることを特徴とする請求項19に記載の発光ダイオード。
- 基板上に第1半導体層、活性層、第2半導体層を含む半導体積層構造体と、
前記半導体積層構造体上に形成される導電性基板と、
前記導電性基板上にオーミックコンタクトされて形成される電極と、
前記電極と前記第2半導体層との間に介在され、前記電極から露出した部分を有する反射層と、
前記第2半導体層上に配されるとともに、前記反射層の前記露出した部分を覆う透明電極層と、を備え、
前記電極は、前記電極及び前記導電性基板にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を含み、
前記レーザー溝は、前記反射層が設けられていない位置で、前記電極から前記第2半導体層の一部まで貫通する
発光ダイオード。 - 導電性基板上に第1半導体層、活性層、第2半導体層を順次形成して半導体積層構造体を形成し、
前記半導体積層構造体上に、ワイヤーボンディングされる電極パッドと、前記電極パッドで拡張形成される延長パッドとを含む電極を形成し、
前記電極にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を、少なくとも前記延長パッドに形成する、
発光ダイオードの製造方法。 - 前記レーザー溝を形成した後、前記レーザー溝を満たして前記電極上に形成されるメッキ層を形成すること、を特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザースクライビングは、
前記電極と前記導電性基板との間のオーミックコンタクトのために熱伝逹を行うことを特徴とする請求項22に記載の発光ダイオードの製造方法。 - 前記電極にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を形成する前に、
前記導電性基板に電極パッドを形成すること、をさらに含むことを特徴とする請求項22に記載の発光ダイオードの製造方法。 - 前記レーザー溝を満たして前記電極上に形成されるメッキ層を形成する前に、
前記導電性基板上に反射層を形成することをさらに含むことを特徴とする請求項23に記載の発光ダイオードの製造方法。 - 前記レーザー溝は、前記電極パッドには形成されない、ことを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザー溝は、前記電極パッド及び前記延長パッドに形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザー溝は、前記電極パッド上に複数の平行なグルーブ状に形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザー溝は、前記電極パッド上にリング状に形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザー溝は、前記電極パッド上に所定間隔で整列された点状に形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザー溝は、前記延長パッドに不連続的な点線状に形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記レーザー溝は、前記延長パッドに複数の円状に形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 前記電極パッドは、n型電極パッドまたはp型電極パッドで形成されることを特徴とする請求項22に記載の発光ダイオードの製造方法。
- 導電性基板上に第1半導体層、活性層、第2半導体層を順次形成して半導体積層構造体を形成し、
反射層を形成し、
前記半導体積層構造体上に電極を形成し、
前記電極にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を形成し、
前記反射層は、前記電極と前記導電性基板との間に介在され、前記電極から露出した部分を有し、
前記レーザー溝は、前記反射層が設けられていない位置で、前記電極から前記導電性基板の一部まで貫通する
発光ダイオードの製造方法。 - 導電性基板上に第1半導体層、活性層、第2半導体層を順次形成して半導体積層構造体を形成し、
反射層を形成し、
透明電極層を形成し、
前記半導体積層構造体上に電極を形成し、
前記電極にレーザースクライビングし、前記電極から前記導電性基板の一部まで貫通して形成されるレーザー溝を形成し、
前記反射層は、前記電極と前記第2半導体層との間に介在され、前記電極から露出した部分を有し、
前記透明電極層は、前記第2半導体層上に配されるとともに、前記反射層の前記露出した部分を覆い、
前記レーザー溝は、前記反射層が設けられていない位置で、前記電極から前記第2半導体層の一部まで貫通する
発光ダイオードの製造方法。
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