JP5125112B2 - Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them - Google Patents

Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them Download PDF

Info

Publication number
JP5125112B2
JP5125112B2 JP2007011147A JP2007011147A JP5125112B2 JP 5125112 B2 JP5125112 B2 JP 5125112B2 JP 2007011147 A JP2007011147 A JP 2007011147A JP 2007011147 A JP2007011147 A JP 2007011147A JP 5125112 B2 JP5125112 B2 JP 5125112B2
Authority
JP
Japan
Prior art keywords
thin film
atomic
liquid crystal
crystal display
wiring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2007011147A
Other languages
Japanese (ja)
Other versions
JP2008057031A (en
Inventor
暁 森
守斌 張
芳昌 林
理恵 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP2007011147A priority Critical patent/JP5125112B2/en
Publication of JP2008057031A publication Critical patent/JP2008057031A/en
Application granted granted Critical
Publication of JP5125112B2 publication Critical patent/JP5125112B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Liquid Crystal (AREA)
  • Physical Vapour Deposition (AREA)

Description

この発明は、ガラス基板表面に対する密着性に優れ、さらにヒロックおよびボイドなどの熱欠陥が発生することのない銅合金薄膜からなる液晶表示装置用配線および電極、並びにそれらを形成するためのスパッタリングターゲットに関するものである。  TECHNICAL FIELD The present invention relates to a liquid crystal display device wiring and electrode comprising a copper alloy thin film having excellent adhesion to a glass substrate surface and free from thermal defects such as hillocks and voids, and a sputtering target for forming them. Is.

一般に、フラットパネルディスプレイなどの液晶表示装置にはガラス基板表面に格子状に金属薄膜からなる配線が密着して形成されており、この金属薄膜からなる格子状配線の交差点にTFTトランジスターが設けられており、このTFTトランジスターのゲート電極も金属薄膜で形成されている。これらガラス基板表面に形成された金属薄膜からなる配線および電極は液晶表示装置の製造工程において熱処理が施される。前記配線および電極となる金属薄膜として、純銅薄膜を使用することが知られているが、近年、Mn、Zn、Ga、Li、Ge、Sr、Ag、In、Sn、Ba、PrおよびNdからなる群から選択される少なくとも1種以上の金属を0.1〜20原子%を含有する銅合金薄膜が使用されるようになってきた(特許文献1参照)。
WO2006/025347
In general, a liquid crystal display device such as a flat panel display has a wiring made of a metal thin film in close contact with a glass substrate surface, and a TFT transistor is provided at an intersection of the metal thin film. The gate electrode of the TFT transistor is also formed of a metal thin film. These wires and electrodes made of a metal thin film formed on the surface of the glass substrate are subjected to heat treatment in the manufacturing process of the liquid crystal display device. Although it is known to use a pure copper thin film as the metal thin film serving as the wiring and the electrode, in recent years, it is made of Mn, Zn, Ga, Li, Ge, Sr, Ag, In, Sn, Ba, Pr, and Nd. Copper alloy thin films containing 0.1 to 20 atomic% of at least one metal selected from the group have been used (see Patent Document 1).
WO2006 / 025347

近年、液晶表示装置は益々大型化しており、30インチ以上の大型液晶パネルが量産されるようになって来た。そのためにガラス基板表面に形成されている配線が長くなり、さらに液晶表示装置は益々高精細化しているためにガラス基板表面に形成される配線を益々細くすることが求められている。そのために配線の電気抵抗を低くするとともに配線が剥離することのないようにガラス基板表面に対する密着性に優れた金属薄膜で構成されることが必要である。さらに、液晶表示装置の配線および電極はその製造中に熱処理が施されるが、かかる熱処理工程で高温に曝されてもヒロックおよびボイドなどの熱欠陥が発生しない金属薄膜で構成されることが要求されている。
これら要求に対して、従来の純銅薄膜は電気抵抗が極めて低いもののガラス基板表面に対する密着性が悪く、さらに高温に曝されるとヒロックおよびボイドが発生するので好ましくない。また、従来の銅合金薄膜は高温に曝されるとヒロックおよびボイドなどの熱欠陥の発生を十分に防止することができない。
In recent years, liquid crystal display devices have become increasingly larger, and large liquid crystal panels of 30 inches or more have been mass-produced. For this reason, the wiring formed on the surface of the glass substrate becomes longer, and the liquid crystal display device is becoming higher in definition, so that the wiring formed on the surface of the glass substrate is required to be thinner. For this purpose, it is necessary to reduce the electrical resistance of the wiring and to form a metal thin film having excellent adhesion to the glass substrate surface so that the wiring does not peel off. Furthermore, the wiring and electrodes of the liquid crystal display device are subjected to heat treatment during their manufacture, but are required to be composed of a metal thin film that does not generate thermal defects such as hillocks and voids even when exposed to high temperatures in the heat treatment process. Has been.
In response to these requirements, the conventional pure copper thin film has an extremely low electrical resistance, but has poor adhesion to the surface of the glass substrate. Further, when exposed to high temperatures, hillocks and voids are generated, which is not preferable. Further, when a conventional copper alloy thin film is exposed to a high temperature, generation of thermal defects such as hillocks and voids cannot be sufficiently prevented.

そこで、本発明者等は、電気抵抗が低く、ガラス基板表面に対する密着性に優れ、さらに高温に曝されてもヒロックおよびボイドなどの熱欠陥の発生が極めて少ない銅合金薄膜を開発し、これを液晶表示装置における配線および電極に適用すべく研究を行った。その結果、
(イ)純銅(特に純度:99.99%以上の無酸素銅)に、Agを0.02〜2原子%を含有し、さらにV、Cr、Mn、FeおよびZnのうちの1種または2種以上を合計で0.01〜2.5原子%を含有した成分組成を有する銅合金薄膜は従来の銅合金薄膜に比べて電気抵抗が低く、さらに、高温に曝されてもヒロックおよびボイドの熱欠陥が発生することが少ないことから、かかる成分組成を有する銅合金薄膜は液晶表示装置用配線および電極として使用した場合に優れた効果を奏する、
(ロ)前記銅合金薄膜は、Ag:0.1〜10原子%を含有し、さらにV、Cr、Mn、FeおよびZnのうちの1種または2種以上を合計で0.02〜5原子%を含み、残部がCuおよび不可避不純物からなる組成を有するターゲットを用いてスパッタリングすることにより作製することができる、という研究結果が得られたのである。
Therefore, the present inventors have developed a copper alloy thin film having low electrical resistance, excellent adhesion to the glass substrate surface, and extremely low occurrence of thermal defects such as hillocks and voids even when exposed to high temperatures. Research was conducted to apply to wiring and electrodes in liquid crystal display devices. as a result,
(B) pure copper (especially purity: 99.99% or more oxygen-free copper) to the Ag containing 0.02 to 2 atomic%, further V, Cr, Mn, 1 kind of F e Contact and Zn Alternatively, a copper alloy thin film having a component composition containing a total of 0.01 to 2.5 atomic% of two or more types has a lower electrical resistance than a conventional copper alloy thin film, and further, hillock and Since there are few occurrences of thermal defects in voids, a copper alloy thin film having such a component composition has an excellent effect when used as a liquid crystal display device wiring and electrode.
(B) the copper alloy thin film, Ag: 0.1 to 10 containing at%, further 0.02 to a total of V, Cr, Mn, 1 kind of F e Contact and Zn, or two or more The research result has been obtained that it can be produced by sputtering using a target having a composition containing 5 atomic% and the balance of Cu and inevitable impurities.

この発明は、上記の研究結果に基づいてなされたものであって、
(1)Ag:0.02〜2原子%を含有し、さらに、Mn:0.2〜0.7原子%を含み 、または、MnとV、Cr、FeおよびZnのうちの1種または2種との合計で0.01〜2.5原子%を含み、残部がCuおよび不可避不純物からなる組成を有する銅合金薄膜からなる熱欠陥の少ない液晶表示装置用配線、
(2)Ag:0.02〜2原子%を含有し、さらに、Mn:0.2〜0.7原子%を含み 、または、MnとV、Cr、FeおよびZnのうちの1種または2種との合計で0.01〜2.5原子%を含み、残部がCuおよび不可避不純物からなる組成を有する銅合金薄膜からなる熱欠陥の少ない液晶表示装置用電極、
(3)Ag:0.1〜10原子%を含有し、さらに、Mn:0.2〜0.7原子%を含み 、または、MnとV、Cr、FeおよびZnのうちの1種または2種との合計で0.02〜5原子%を含み、残部がCuおよび不可避不純物からなる組成を有する熱欠陥の少ない液晶表示装置用配線または電極を形成するためのスパッタリングターゲット、に特徴を有するものである。
This invention was made based on the above research results,
(1) Ag: 0.02 to 2 contain an atom%, in further, Mn: 0.2 to 0.7 include atomic%, or one of Mn and V, Cr, Fe and Zn or 0 in total with 2 types . A wiring for a liquid crystal display device having a small number of thermal defects, comprising a copper alloy thin film having a composition comprising 01 to 2.5 atomic% and the balance being Cu and inevitable impurities;
(2) Ag: 0.02~2 containing atomic%, in further, Mn: 0.2 to 0.7 include atomic%, or one of Mn and V, Cr, Fe and Zn or 0 in total with 2 types . An electrode for a liquid crystal display device having a small number of thermal defects, comprising a copper alloy thin film having a composition comprising 01 to 2.5 atomic% and the balance being Cu and inevitable impurities;
(3) Ag: 0.1~10 containing atomic%, in further, Mn: 0.2 to 0.7 include atomic%, or one of Mn and V, Cr, Fe and Zn or 0 in total with 2 types . It is characterized by a sputtering target for forming a wiring or electrode for a liquid crystal display device having a composition containing 02 to 5 atomic% and the balance of Cu and inevitable impurities and having few thermal defects.

この発明の液晶表示装置の配線および電極を構成する銅合金薄膜は、ターゲットを用いてスパッタリングすることにより作製する。このターゲットは、まず純度:99.99%以上の無酸素銅を、不活性ガス雰囲気中、高純度グラファイトモールド内で高周波溶解し、得られた溶湯にAgを0.1〜10原子%を添加し、さらにV、Cr、Mn、FeおよびZnのうちの1種または2種以上を合計で0.02〜5原子%を添加して溶解し、得られた溶湯を不活性ガス雰囲気中で鋳造し急冷凝固させたのち、さらに熱間圧延し、最後に歪取り焼鈍を施すことにより作製する。このようにして得られたターゲットをバッキングプレートに接合し、通常の条件でスパッタリングすることによりこの発明の液晶表示装置における配線および電極用銅合金薄膜を形成することができる。The copper alloy thin film which comprises the wiring and electrode of the liquid crystal display device of this invention is produced by sputtering using a target. In this target, oxygen-free copper with a purity of 99.99% or higher is first melted at high frequency in an inert gas atmosphere in a high-purity graphite mold, and 0.1 to 10 atomic% of Ag is added to the resulting molten metal. and further V, Cr, Mn, 1 kind of F e Contact and Zn or of two or more dissolved by addition of 0.02 to 5 atomic% in total, the resulting melt an inert gas atmosphere After being cast and rapidly solidified, it is further hot-rolled and finally subjected to strain relief annealing. The target thus obtained is bonded to a backing plate and sputtered under normal conditions to form a copper alloy thin film for wiring and electrodes in the liquid crystal display device of the present invention.

次に、この発明の液晶表示装置における配線および電極を構成する銅合金薄膜の成分組成を前述のごとく限定した理由を説明する。
(A)銅合金薄膜の成分組成
Ag:
この発明の液晶表示装置における配線および電極を構成する銅合金薄膜に含まれるAgは、結晶粒を微細化し、液晶表示装置における配線および電極を構成する銅合金薄膜のヒロックおよびボイドなどの熱欠陥の発生を抑制する作用を有するが、その含有量が0.02原子%未満では所望の効果が得られないので好ましくなく、一方、2原子%を越えて含有すると結晶粒を微細化し、液晶表示装置における配線および電極を構成する銅合金薄膜のヒロックおよびボイドなどの熱欠陥の発生を抑制し、さらに電気抵抗は一層低下するものの、Agを2原子%を越えて含有する銅合金薄膜をスパッタリングにより形成するには、ターゲットに含まれるAgを10原子%を越えて含有する必要があり、Agを10原子%を越えて含有するターゲットはその製造時の熱間圧延時に割れが発生し、歩留まりが極端に低下するようになるので好ましくない。したがって、この発明の銅合金薄膜に含まれるAgを0.02〜2原子%に定めた。
V、Cr、Mn、FeおよびZn:
V、Cr、Mn、FeおよびZnはいずれもAgと共存することによりガラス基板表面に対する密着性を向上させ、さらにヒロックおよびボイドなどの熱欠陥の発生を抑制する作用を有する成分であるが、これら成分のうちの1種または2種以上を合計で0.01原子%未満添加しても所望の効果が得られず、一方、2.5原子%を越えて含有すると、銅合金薄膜の電気抵抗が上昇するので好ましくない。したがって、この発明の銅合金薄膜に含まれるV、Cr、Mn、FeおよびZnの内の1種または2種以上合計で0.01〜2.5原子%に定めた。
Next, the reason why the component composition of the copper alloy thin film constituting the wiring and electrodes in the liquid crystal display device of the present invention is limited as described above will be described.
(A) Component composition Ag of copper alloy thin film:
The Ag contained in the copper alloy thin film constituting the wiring and electrode in the liquid crystal display device of the present invention has finer crystal grains and is free from thermal defects such as hillocks and voids in the copper alloy thin film constituting the wiring and electrode in the liquid crystal display device. Although it has an action of suppressing generation, if the content is less than 0.02 atomic%, the desired effect cannot be obtained, which is not preferable. On the other hand, if the content exceeds 2 atomic%, the crystal grains are refined and the liquid crystal display device Suppresses generation of thermal defects such as hillocks and voids in the copper alloy thin film constituting the wiring and electrodes in the metal, and further reduces the electrical resistance, but forms a copper alloy thin film containing Ag exceeding 2 atomic% by sputtering In order to achieve this, it is necessary to contain more than 10 atomic% of Ag contained in the target, and a target containing more than 10 atomic% of Ag. And cracking occurs during hot rolling during production, because the yield will be lowered extremely undesirable. Therefore, Ag contained in the copper alloy thin film of the present invention is set to 0.02 to 2 atomic%.
V, Cr, Mn, F e you and Zn:
V, Cr, Mn, both the F e Contact and Zn improves the adhesion to the glass substrate surface by coexisting with Ag, is a component having an effect further suppressing heat generation defects such as hillocks and voids In addition, even if one or more of these components are added in a total amount of less than 0.01 atomic%, the desired effect cannot be obtained. On the other hand, if the content exceeds 2.5 atomic%, the copper alloy thin film Since electric resistance rises, it is not preferable. Thus, defined the V contained in the copper alloy thin film of the invention, Cr, Mn, to 0.01 to 2.5 atomic% in total of one or more of F e Contact and Zn.

(B)ターゲットの成分組成
Ag:
この発明のスパッタリングターゲットに含まれるAgが0.1原子%未満ではAg:0.02原子%以上を含有する銅合金薄膜が得られないので好ましくなく、一方、Agを10原子%を越えて含有するとターゲット作製時の熱間圧延時に割れが発生し、歩留まりが極端に低下するようになるので好ましくない。したがって、この発明のスパッタリングターゲットに含まれるAgを0.1〜10原子%に定めた。
V、Cr、Mn、FeおよびZn:
さらに、この発明のスパッタリングターゲットに含まれるV、Cr、Mn、FeおよびZnのうちの1種または2種以上を合計で0.02〜5原子%に限定したのは、これら成分が0.02原子%未満ではV、Cr、Mn、FeおよびZnのうちの1種または2種以上を合計で0.01原子%以上含む銅合金薄膜を形成することができないからであり、一方、これら成分を5原子%を越えて含有すると、形成される銅合金薄膜に含まれるV、Cr、Mn、FeおよびZnのうちの1種または2種以上の合計が2.5原子%を越えるようになり、形成される銅合金薄膜の電気抵抗が上昇するので好ましくないからである。
(B) Target component composition Ag:
If the Ag contained in the sputtering target of the present invention is less than 0.1 atomic%, a copper alloy thin film containing Ag: 0.02 atomic% or more cannot be obtained. On the other hand, Ag is contained in excess of 10 atomic%. Then, cracks occur during hot rolling at the time of target preparation, and the yield is extremely lowered, which is not preferable. Therefore, Ag contained in the sputtering target of the present invention is set to 0.1 to 10 atomic%.
V, Cr, Mn, F e you and Zn:
Furthermore, V contained in the sputtering target of the present invention, Cr, Mn, was limited to 0.02 to 5 atomic% of one or two or more in total of F e Contact and Zn are these components 0 If it is less than .02 atomic% and the V, Cr, Mn, can not be formed of one or a copper alloy thin film containing 0.01 at% or more of two or more in total of F e Contact and Zn, whereas these when containing components beyond 5 atomic%, V contained in the copper alloy thin film formed, Cr, Mn, F e Contact and one or the sum of two or more of Zn is 2.5 atomic% This is because the electrical resistance of the formed copper alloy thin film is increased, which is not preferable.

この発明の液晶表示装置における配線および電極は、ガラス基板表面に対する密着性に優れ、高温に曝されてもヒロックおよびボイドなどの熱欠陥の発生がなく、さらに電気抵抗が低いことから高精細化し大型化した液晶表示装置の配線および電極に使用しても消費電力を少なくすることができるなど優れた効果を奏するものである。  The wiring and electrodes in the liquid crystal display device of the present invention have excellent adhesion to the glass substrate surface, do not generate thermal defects such as hillocks and voids even when exposed to high temperatures, and have a high electrical definition and large size due to low electrical resistance. Even if it is used for the wiring and electrodes of the liquid crystal display device, it has excellent effects such as reduced power consumption.

純度:99.99質量%の無酸素銅を用意し、この無酸素銅をArガス雰囲気中、高純度グラファイトモールド内で高周波溶解し、得られた溶湯にAgおよび/またはV、Cr、Mn、FeおよびZnのうちの1種もしくは2種以上を添加し溶解して表1に示される成分組成を有する溶湯となるように成分調整し、得られた溶湯を冷却されたカーボン鋳型に鋳造し、さらに熱間圧延したのち最終的に歪取り焼鈍し、得られた圧延体の表面を旋盤加工して外径:200mm×厚さ:10mmの寸法を有し、表1に示される成分組成を有する本発明銅合金スパッタリングターゲット(以下、本発明ターゲットという)1〜5および比較銅合金スパッタリングターゲット(以下、比較ターゲットという)1〜7および従来スパッタリングターゲット(以下、従来ターゲットという)1〜2を作製した。さらに無酸素銅に元素を添加することなく純銅からなるスパッタリングターゲット(以下、従来ターゲットという)3を作製した。Purity: 99.99 mass% oxygen-free copper was prepared, and the oxygen-free copper was high-frequency melted in a high-purity graphite mold in an Ar gas atmosphere, and Ag and / or V, Cr, Mn, F e Contact and was added dissolved singly or two of Zn to component adjustment so as to melt with the chemical composition shown in Table 1, casting the carbon mold that has been cooled and the resulting molten metal Further, after hot rolling, it is finally subjected to strain relief annealing, and the surface of the obtained rolled body is turned to have a dimension of outer diameter: 200 mm × thickness: 10 mm, and the composition shown in Table 1 the present invention copper alloy sputtering target having a (hereinafter, the present invention that target) 5 and Comparative copper alloy sputtering target (hereinafter, referred to as comparative target) 1-7 and the conventional sputtering target (hereinafter , To prepare a conventional that target) 1-2. Further, a sputtering target (hereinafter referred to as a conventional target) 3 made of pure copper was prepared without adding an element to oxygen-free copper.

さらに、無酸素銅製バッキングプレートを用意し、この無酸素銅製バッキングプレートに前記本発明ターゲット1〜5、比較ターゲット1〜7および従来ターゲット1〜3を重ね合わせ、温度:200℃でインジウムはんだ付けすることにより本発明ターゲット1〜 、比較ターゲット1〜7および従来ターゲット1〜3を無酸素銅製バッキングプレートに接合してバッキングプレート付きターゲットを作製した。Further, an oxygen-free copper backing plate is prepared, and the present invention targets 1 to 5 , the comparative targets 1 to 7 and the conventional targets 1 to 3 are superposed on the oxygen-free copper backing plate, and indium soldered at a temperature of 200 ° C. to prepare a backing plate with the target present invention targets 1-5, the comparison target 1-7 and the conventional target 1-3 bonded to oxygen-free copper backing plate by.

本発明ターゲット1〜5、比較ターゲット1〜7および従来ターゲット1〜3を無酸素銅製バッキングプレートにはんだ付けして得られたバッキングプレート付きターゲットを、ターゲットとガラス基板(縦:50mm、横:50mm、厚さ:0.7mmの寸法を有するコーニング社製1737のガラス基板)との距離:70mmとなるようにセットし、
電源:直流方式、
スパッタパワー:600W、
到達真空度:4×10−5Pa、
雰囲気ガス組成:Ar、
Arガス圧:0.67Pa、
ガラス基板:加熱なし、
の条件でガラス基板の表面に、厚さ:300nmを有し、表2〜3に示される成分組成を有する本発明銅合金薄膜(以下、本発明薄膜という)1〜5および比較銅合金薄膜(以下、比較薄膜という)1〜7および従来銅合金薄膜(以下、従来薄膜という)1〜3を形成した。
The target with a backing plate obtained by soldering the present invention targets 1 to 5 , the comparative targets 1 to 7 and the conventional targets 1 to 3 to an oxygen-free copper backing plate, the target and a glass substrate (length: 50 mm, width: 50 mm) , Thickness: 0.77 mm Corning 1737 glass substrate) and distance: 70 mm,
Power supply: DC method,
Sputter power: 600W
Ultimate vacuum: 4 × 10 −5 Pa,
Atmospheric gas composition: Ar,
Ar gas pressure: 0.67 Pa,
Glass substrate: no heating,
The copper alloy thin film of the present invention (hereinafter referred to as the present thin film) 1 to 5 and a comparative copper alloy thin film (hereinafter referred to as the present thin film) having a thickness of 300 nm on the surface of the glass substrate under the conditions Hereafter, 1-7 and the conventional copper alloy thin film (henceforth a conventional thin film) 1-3 were formed.

得られた本発明薄膜1〜5、比較薄膜1〜7および従来薄膜1〜7をそれぞれ赤外線加熱炉に装入し、到達真空度:4×10−4Paの真空雰囲気中、昇温速度:5℃/min、最高温度:350℃、30分間保持の熱処理を施した。これら熱処理を施した本発明薄膜1〜5、比較薄膜1〜7および従来薄膜1〜3の表面を5000倍のSEMで5個所の膜表面を観察し、ヒロックおよびボイドの発生の有無を観察し、その結果を表2〜3に示した。
さらに、得られた本発明薄膜1〜5、比較薄膜1〜7および従来薄膜1〜3の5点の比抵抗を四探針法により測定し、その平均値を求め、それらの結果を表2〜3に示した。
さらに、JIS-K5400に準じ、1mm間隔で本発明薄膜1〜5、比較薄膜1〜7および従来薄膜1〜3に碁盤目状に切れ目を入れた後、3M社製スコッチテープで引き剥がし、ガラス基板中央部の10mm角内でガラス基板に付着していた薄膜の面積%を測定する碁盤目付着試験を実施し、その結果を表2〜3に示し、ガラス基板に対する本発明薄膜1〜5、比較薄膜1〜7および従来薄膜1〜3の密着性を評価した。
The obtained thin films of the present invention 1-5 , comparative thin films 1-7 and conventional thin films 1-7 were charged into an infrared heating furnace, respectively, and the rate of temperature rise in a vacuum atmosphere of ultimate vacuum: 4 × 10 −4 Pa: Heat treatment was performed at 5 ° C./min, maximum temperature: 350 ° C., and held for 30 minutes. The surfaces of the inventive thin films 1 to 5 , comparative thin films 1 to 7 and conventional thin films 1 to 3 subjected to these heat treatments were observed at five locations with a SEM of 5,000 times to observe whether hillocks and voids were generated. The results are shown in Tables 2-3.
Furthermore, the specific resistance of five points of the obtained present invention thin films 1 to 5 , comparative thin films 1 to 7, and conventional thin films 1 to 3 was measured by a four-probe method, and the average value was obtained. Shown in ~ 3.
Further, according to JIS-K5400, the present thin films 1 to 5 , comparative thin films 1 to 7, and conventional thin films 1 to 3 are cut into a grid pattern at intervals of 1 mm, and then peeled off with a 3M scotch tape. A cross-cut adhesion test for measuring the area percentage of the thin film adhered to the glass substrate within a 10 mm square in the center of the substrate, the results are shown in Tables 2-3, and the present thin films 1 to 5 for the glass substrate, The adhesion of the comparative thin films 1 to 7 and the conventional thin films 1 to 3 was evaluated.



表1〜3に示される結果から以下の事項が分かる。
(i)高純度銅からなる従来薄膜3は比抵抗が極めて小さいもののヒロックおよびボイドが発生し、さらにガラス基板に対する密着性が劣る。これに対し、本発明薄膜1〜5はヒロックおよびボイドの発生がなく、さらにAgを単独で含む従来薄膜1は比抵抗が小さく、ヒロックおよびボイドの発生がないもののガラス基板に対する密着性が劣り、さらにMnを単独で含む従来薄膜2はガラス基板に対する密着性が優れているが、比抵抗が高く、ヒロックおよびボイドが発生するので好ましくないことがわかる。
(ii)この発明の条件から外れて少ないAgを含む比較薄膜1はヒロックおよびボイドが発生するので好ましくなく、一方、Agをこの発明の条件から外れて多く含むターゲットはその作製時に割れが発生してターゲットを作製することができず、そのためにAgを2原子%を越えて含む比較薄膜2をスパッタリングにより成膜することができなくなることが分かる。さらにこの発明の条件から外れて添加元素を含む比較薄膜3〜7は少なくとも一つの好ましくない特性が現れることが分かる。
The following items are understood from the results shown in Tables 1 to 3.
(I) Although the conventional thin film 3 made of high-purity copper has a very small specific resistance, hillocks and voids are generated, and the adhesion to the glass substrate is inferior. On the other hand, the present invention thin films 1 to 5 have no generation of hillocks and voids, and the conventional thin film 1 alone containing Ag alone has a small specific resistance and is inferior in adhesion to the glass substrate, although no generation of hillocks and voids. Furthermore, although the conventional thin film 2 containing Mn alone is excellent in adhesion to a glass substrate, it is understood that the specific resistance is high and hillocks and voids are generated, which is not preferable.
(Ii) The comparative thin film 1 containing a small amount of Ag deviating from the conditions of the present invention is not preferable because hillocks and voids are generated. On the other hand, a target containing a large amount of Ag deviating from the conditions of the present invention is cracked during its production. Thus, it can be seen that the target cannot be manufactured, and therefore, the comparative thin film 2 containing Ag exceeding 2 atomic% cannot be formed by sputtering. Further, it can be seen that the comparative thin films 3 to 7 containing the additive element deviate from the conditions of the present invention and at least one undesirable characteristic appears.

Claims (4)

Ag:0.02〜2原子%を含有し、さらに、Mn:0.2〜0.7原子%を含み、ま たは、MnとV、Cr、FeおよびZnのうちの1種または2種との合計で0.01〜2.5原子%を含み、残部がCuおよび不可避不純物からなる組成を有する銅合金薄膜からなることを特徴とする熱欠陥発生のない液晶表示装置用配線。Ag: 0.02 to 2 contain an atom%, in further, Mn: 0.2 to 0.7 include atomic%, was or, Mn and V, Cr, 1 kind of Fe and Zn or 2 0 in total with seeds . A wiring for a liquid crystal display device free from the occurrence of thermal defects, comprising a copper alloy thin film having a composition comprising 01 to 2.5 atomic% and the balance comprising Cu and inevitable impurities. Ag:0.02〜2原子%を含有し、さらに、Mn:0.2〜0.7原子%を含み、ま たは、MnとV、Cr、FeおよびZnのうちの1種または2種との合計で0.01〜2.5原子%を含み、残部がCuおよび不可避不純物からなる組成を有する銅合金薄膜からなることを特徴とする熱欠陥発生のない液晶表示装置用電極。Ag: 0.02 to 2 contain an atom%, in further, Mn: 0.2 to 0.7 include atomic%, was or, Mn and V, Cr, 1 kind of Fe and Zn or 2 0 in total with seeds . An electrode for a liquid crystal display device free from the occurrence of thermal defects, comprising a copper alloy thin film having a composition comprising 01 to 2.5 atomic% and the balance comprising Cu and inevitable impurities. Ag:0.1〜10原子%を含有し、さらに、Mn:0.2〜0.7原子%を含み、ま たは、MnとV、Cr、FeおよびZnのうちの1種または2種との合計で0.02〜5原子%を含み、残部がCuおよび不可避不純物からなる組成を有することを特徴とする熱欠陥発生のない液晶表示装置用配線または電極を形成するためのスパッタリングターゲット。Ag: 0.1 to 10 contain an atom%, in further, Mn: 0.2 to 0.7 include atomic%, was or, Mn and V, Cr, 1 kind of Fe and Zn or 2 0 in total with seeds . A sputtering target for forming a wiring or electrode for a liquid crystal display device free from the occurrence of thermal defects, characterized by comprising a composition comprising 02 to 5 atomic% and the balance being Cu and inevitable impurities. 請求項1記載の配線および請求項2記載の電極を形成した液晶表示装置。  A liquid crystal display device in which the wiring according to claim 1 and the electrode according to claim 2 are formed.
JP2007011147A 2006-07-31 2007-01-22 Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them Expired - Fee Related JP5125112B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007011147A JP5125112B2 (en) 2006-07-31 2007-01-22 Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006207637 2006-07-31
JP2006207637 2006-07-31
JP2007011147A JP5125112B2 (en) 2006-07-31 2007-01-22 Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them

Publications (2)

Publication Number Publication Date
JP2008057031A JP2008057031A (en) 2008-03-13
JP5125112B2 true JP5125112B2 (en) 2013-01-23

Family

ID=39240127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007011147A Expired - Fee Related JP5125112B2 (en) 2006-07-31 2007-01-22 Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them

Country Status (1)

Country Link
JP (1) JP5125112B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5541651B2 (en) * 2008-10-24 2014-07-09 三菱マテリアル株式会社 Sputtering target for wiring film formation for thin film transistors
JP5567042B2 (en) * 2012-02-10 2014-08-06 株式会社Shカッパープロダクツ Copper sputtering target material for TFT
WO2016072297A1 (en) * 2014-11-07 2016-05-12 住友金属鉱山株式会社 Copper alloy target

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003243325A (en) * 2002-02-20 2003-08-29 Mitsubishi Materials Corp Sputtering target for forming copper alloy wiring film and copper alloy wiring film little affected by heat and formed by using the same
JP2004193552A (en) * 2002-10-17 2004-07-08 Mitsubishi Materials Corp Copper alloy sputtering target for forming semiconductor device interconnect line seed layer
JP2004193553A (en) * 2002-10-17 2004-07-08 Mitsubishi Materials Corp Copper alloy sputtering target for forming semiconductor device interconnect line seed layer and seed layer formed using that target
AT7491U1 (en) * 2004-07-15 2005-04-25 Plansee Ag MATERIAL FOR CONCRETE ALLOY COPPER ALLOY
JP4330517B2 (en) * 2004-11-02 2009-09-16 株式会社神戸製鋼所 Cu alloy thin film, Cu alloy sputtering target, and flat panel display

Also Published As

Publication number Publication date
JP2008057031A (en) 2008-03-13

Similar Documents

Publication Publication Date Title
JP5420328B2 (en) Sputtering target for forming wiring films for flat panel displays
JP5541651B2 (en) Sputtering target for wiring film formation for thin film transistors
JP4840172B2 (en) Wiring and electrodes for liquid crystal display devices with no thermal defects and excellent adhesion
JP5339830B2 (en) Thin film transistor wiring film having excellent adhesion and sputtering target for forming this wiring film
KR20210029744A (en) Copper alloy sputtering target and manufacturing method of copper alloy sputtering target
JP5125112B2 (en) Wiring and electrode for liquid crystal display device free from thermal defect and sputtering target for forming them
JP5234306B2 (en) Wiring and electrode for flat panel display using TFT transistor with less surface defects and good surface condition, and sputtering target for forming them
JP2003243325A (en) Sputtering target for forming copper alloy wiring film and copper alloy wiring film little affected by heat and formed by using the same
JP5207120B2 (en) Wiring and electrodes for liquid crystal display devices with no thermal defects and excellent adhesion
JP2008051840A (en) Wiring and electrode for liquid crystal display free from occurrence of thermal defect and having excellent adhesiveness, and sputtering target for forming those
JP5099504B2 (en) Wiring and electrodes for liquid crystal display devices with excellent adhesion
JP4840173B2 (en) Laminated wiring and laminated electrode for liquid crystal display device having no thermal defect and excellent adhesion, and methods for forming them
JP2008107710A (en) Wiring and electrode for liquid crystal display device causing less heat defect and preferable surface state, and sputtering target for forming the same
JP2008203808A (en) Wiring and electrode for flat panel display using tft transistor free from thermal defect generation and having excellent adhesiveness and sputtering target for forming the same
JP6033493B1 (en) Copper-based alloy sputtering target
JP4962904B2 (en) Method for forming wiring or electrode for liquid crystal display device having no thermal defect and excellent adhesion
TWI619820B (en) Copper alloy sputtering target
JP2007328136A (en) Copper alloy thin film for wiring and electrode of liquid crystal display and sputtering target for forming thin film
KR20090112478A (en) Electromagnetic interference shielding Ag-based materials and films

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090331

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110627

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110728

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110921

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120403

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120514

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20121002

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121015

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 5125112

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151109

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees