JP2006111969A - スパッタターゲットの製造方法 - Google Patents
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Abstract
【解決手段】Y、Sc、La、Ce、Nd、Sm、Gd、Tb、Dy、Er、Th、Sr、Ti、Zr、V、Nb、Ta、Cr、Mo、W、Mn、Tc、Re、Fe、Co、Ni、Pd、Ir、Pt、Cu、Ag、Au、Cd、Si、PbおよびBから選ばれる少なくとも1種の第1の元素を0.001〜30原子%の範囲で含み、残部が実質的にAlからなるインゴットまたは焼結体を、大気溶解法、真空溶解法、急冷凝固法、粉末冶金法で作製するにあたって、O、NおよびHから選ばれる少なくとも1種の第2の元素を含むガスを使用する。得られたインゴットや焼結体を加工してスパッタターゲットを作製する。
【選択図】図2
Description
まずAlに、このAlに対して0.83原子%(2.7質量%)のYと、このYに対して1630原子ppmのCとを添加し、この混合原料を高周波誘導溶解して目的組成のインゴットを作製した。このインゴットに対して冷間圧延および機械加工を施し、直径127mm×厚さ5mmのAlスパッタターゲットを作製した。
表2に示す各組成のAlスパッタターゲットを、それぞれ実施例1と同様にして作製した後、実施例1と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。その結果を併せて表2に示す。
Yに代えて各種元素を用いたAlターゲット(表3に組成を示す)を、それぞれ実施例1と同様にして作製した後、実施例1と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。また、試料No16〜21のAl配線膜については、アルカリ溶液中におけるITO電極との反応性も測定、評価した。このアルカリ溶液中におけるITO電極との反応性は、参照電極に銀・塩化銀電極を用いると共に、陽極をITO、陰極を各Al合金とし、通常用いられる電極測定法で調べた。その結果を併せて表3に示す。
まず、Alに対して2.84原子%(6質量%)のCoを添加した原料を、高周波誘導溶解(真空溶解)し、この溶湯内にH2ガスをバブリングしてHを投入した。Hのバブリング量は、インゴット中のH量がCo量に対して980原子ppmとなるように設定した。このようにして作製した目的組成のインゴットに対して、熱間圧延および機械加工を施し、直径127mm×厚さ5mmのAlスパッタターゲットを得た。
表5に示す各組成のAlスパッタターゲットを、それぞれ実施例4と同様にして作製した後、実施例4と同一条件でスパッタ成膜した。このようにして作製した各Al膜をアルカリ溶液(NMD-3/現像液)中に入れ、参照電極(Ag/AgCl/Cl-)を用いて電極電位を測定した。その結果を表5および図8に示す。
Alより標準電極電位が高い元素(Ir、Pt、V、Nb)を用いて、表6に組成を示すAlスパッタターゲットをそれぞれ実施例4と同様にして作製した後、実施例4と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。また、これらAl配線膜については、実施例3と同様にして、アルカリ溶液中におけるITO電極との反応性も測定、評価した。その結果を併せて表6に示す。なお、表6中の比較例6は、高電極電位元素の含有量を本発明の範囲外としたものである。
Alより標準電極電位が高い元素(Au、Ag、Pd)を用いて、表7に組成を示すAlスパッタターゲットをそれぞれ実施例4と同様にして作製した後、実施例4と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。また、Al配線膜のエッチング性については、ウェットエッチングおよびドライエッチングそれぞれのエッチングレートを調べた。その結果を表7に示す。なお、表7中の比較例7は、Hを添加しない以外は実施例7と同一条件で作製したAlスパッタターゲットを用いて、それぞれ同様にスパッタ成膜したAl膜である。
表8に組成を示すAlスパッタターゲットを、それぞれ実施例4と同様にして作製した後、実施例4と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。その結果を表8に示す。
まず、Alに対して0.3原子%(2質量%)のTaを添加した原料を、高周波誘導溶解(真空溶解)し、溶解時にO2をバブリングして酸素を投入した。酸素の投入量は、インゴット中のO量がTa量に対して10原子ppmとなるように設定した。このようにして作製した目的組成のインゴットに対して、熱間圧延および機械加工を施し、直径127mm×厚さ5mmのAlスパッタターゲットを得た。
各種元素を用いたAlターゲット(表10に組成を示す)を、それぞれ実施例9と同様にして作製した後、実施例9と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。また、試料No5〜6のAl配線膜については、実施例3と同様にして、アルカリ溶液中におけるITO電極との反応性も測定、評価した。その結果を表10に示す。なお、表10中の比較例10は、添加元素量を本発明の範囲外としたものである。
まず、Alに対して0.28原子%(2質量%)のPtを添加した原料を、高周波誘導溶解(真空溶解)し、溶解時にN2をバブリングして窒素を投入した。窒素の投入量は、インゴット中のN量がPt量に対して19原子ppmとなるように設定した。このようにして作製した目的組成のインゴットに対して、熱間圧延および機械加工を施し、直径127mm×厚さ5mmのAlスパッタターゲットを得た。
各種元素を用いたAlターゲット(表12に組成を示す)を、それぞれ実施例11と同様にして作製した後、実施例11と同一条件でスパッタ成膜して、それぞれAl配線膜を得た。これら各Al配線膜の特性を実施例1と同様にして測定、評価した。なお、表12中の比較例12は、添加元素量を本発明の範囲外としたものである。
Claims (6)
- Y、Sc、La、Ce、Nd、Sm、Gd、Tb、Dy、Er、Th、Sr、Ti、Zr、V、Nb、Ta、Cr、Mo、W、Mn、Tc、Re、Fe、Co、Ni、Pd、Ir、Pt、Cu、Ag、Au、Cd、Si、PbおよびBから選ばれる少なくとも1種の第1の元素を0.001〜30原子%の範囲で含み、残部が実質的にAlからなるインゴットまたは焼結体を、大気溶解法、真空溶解法、急冷凝固法または粉末冶金法で作製するにあたって、O、NおよびHから選ばれる少なくとも1種の第2の元素を含むガスを使用して、前記インゴットまたは焼結体を作製する工程と、
前記インゴットまたは焼結体を加工してスパッタターゲットを作製する工程と
を具備することを特徴とするスパッタターゲットの製造方法。 - 請求項1記載のスパッタターゲットの製造方法において、
前記インゴットまたは焼結体の作製工程に前記大気溶解法または真空溶解法を適用し、かつ溶解中に前記第2の元素を含むガスでバブリングすることを特徴とするスパッタターゲットの製造方法。 - 請求項1記載のスパッタターゲットの製造方法において、
前記インゴットまたは焼結体の作製工程に前記急冷凝固法としてスプレーフォーミング法を適用し、かつスプレー時に前記第2の元素を含むガスを吹き付けることを特徴とするスパッタターゲットの製造方法。 - 請求項1ないし請求項3のいずれか1項記載のスパッタターゲットの製造方法において、
前記インゴットまたは焼結体に前記第2の元素を前記第1の元素量に対して0.01原子ppm〜50原子%の範囲で含有させることを特徴とするスパッタターゲットの製造方法。 - 請求項1ないし請求項3のいずれか1項記載のスパッタターゲットの製造方法において、
前記インゴットまたは焼結体に前記第2の元素を前記第1の元素量に対して0.01原子ppm〜7.5原子%の範囲で含有させることを特徴とするスパッタターゲットの製造方法。 - 請求項1ないし請求項5のいずれか1項記載のスパッタターゲットの製造方法において、
前記第1の元素はAlと金属間化合物を形成する元素であることを特徴とするスパッタターゲットの製造方法。
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EP1553205B1 (en) | 1995-10-12 | 2017-01-25 | Kabushiki Kaisha Toshiba | Sputter target for forming thin film interconnector and thin film interconnector line |
-
1996
- 1996-10-14 EP EP05003598.9A patent/EP1553205B1/en not_active Expired - Lifetime
- 1996-10-14 JP JP51492097A patent/JP4137182B2/ja not_active Expired - Lifetime
- 1996-10-14 EP EP96933629A patent/EP0855451A4/en not_active Withdrawn
- 1996-10-14 US US10/732,888 patent/USRE41975E1/en not_active Expired - Lifetime
- 1996-10-14 KR KR1019980702718A patent/KR100312548B1/ko active IP Right Grant
- 1996-10-14 US US09/051,567 patent/US6329275B1/en not_active Ceased
- 1996-10-14 WO PCT/JP1996/002961 patent/WO1997013885A1/ja not_active Application Discontinuation
- 1996-11-28 TW TW085114794A patent/TW318276B/zh not_active IP Right Cessation
-
2004
- 2004-03-17 JP JP2004076172A patent/JP4130418B2/ja not_active Expired - Lifetime
-
2005
- 2005-09-22 JP JP2005276820A patent/JP4589854B2/ja not_active Expired - Fee Related
- 2005-09-22 JP JP2005276819A patent/JP4488992B2/ja not_active Expired - Lifetime
- 2005-09-22 JP JP2005276818A patent/JP4488991B2/ja not_active Expired - Lifetime
-
2009
- 2009-03-23 JP JP2009069802A patent/JP5175780B2/ja not_active Expired - Lifetime
- 2009-10-26 JP JP2009245733A patent/JP5175824B2/ja not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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USRE41975E1 (en) | 1995-10-12 | 2010-11-30 | Kabushiki Kaisha Toshiba | Interconnector line of thin film, sputter target for forming the wiring film and electronic component using the same |
USRE45481E1 (en) | 1995-10-12 | 2015-04-21 | Kabushiki Kaisha Toshiba | Interconnector line of thin film, sputter target for forming the wiring film and electronic component using the same |
EP1746173A2 (en) * | 2005-07-22 | 2007-01-24 | Heraeus, Inc. | Enhanced sputter target manufacturing method |
EP1746173A3 (en) * | 2005-07-22 | 2007-05-09 | Heraeus, Inc. | Enhanced sputter target manufacturing method |
EP1923481A2 (en) * | 2005-07-22 | 2008-05-21 | Heraeus, Inc. | Enhanced sputter target manufacturing method |
EP1923481A3 (en) * | 2005-07-22 | 2008-06-18 | Heraeus, Inc. | Enhanced sputter target manufacturing method |
JP2015096647A (ja) * | 2013-10-08 | 2015-05-21 | 株式会社フルヤ金属 | アルミニウムと希土類元素との合金ターゲット及びその製造方法 |
KR20210011455A (ko) * | 2018-06-28 | 2021-02-01 | 가부시키가이샤 아루박 | 알루미늄 합금 타깃 및 그 제조방법 |
KR102571458B1 (ko) | 2018-06-28 | 2023-08-25 | 가부시키가이샤 아루박 | 알루미늄 합금 타깃 및 그 제조방법 |
Also Published As
Publication number | Publication date |
---|---|
EP0855451A1 (en) | 1998-07-29 |
JP5175824B2 (ja) | 2013-04-03 |
EP1553205A1 (en) | 2005-07-13 |
USRE41975E1 (en) | 2010-11-30 |
JP5175780B2 (ja) | 2013-04-03 |
EP0855451A4 (en) | 1999-10-06 |
US6329275B1 (en) | 2001-12-11 |
JP4589854B2 (ja) | 2010-12-01 |
KR19990064231A (ko) | 1999-07-26 |
JP2010031378A (ja) | 2010-02-12 |
JP4488992B2 (ja) | 2010-06-23 |
JP4130418B2 (ja) | 2008-08-06 |
KR100312548B1 (ko) | 2001-12-28 |
TW318276B (ja) | 1997-10-21 |
JP4488991B2 (ja) | 2010-06-23 |
JP2004260194A (ja) | 2004-09-16 |
EP1553205B1 (en) | 2017-01-25 |
JP2006111970A (ja) | 2006-04-27 |
JP2006100822A (ja) | 2006-04-13 |
WO1997013885A1 (en) | 1997-04-17 |
JP2009149997A (ja) | 2009-07-09 |
JP4137182B2 (ja) | 2008-08-20 |
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