KR102646005B1 - Etching solution composition for silver-containing layer, an array substrate for display device using the same and manufacturing method for the array substrate for display device - Google Patents

Etching solution composition for silver-containing layer, an array substrate for display device using the same and manufacturing method for the array substrate for display device Download PDF

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KR102646005B1
KR102646005B1 KR1020180139414A KR20180139414A KR102646005B1 KR 102646005 B1 KR102646005 B1 KR 102646005B1 KR 1020180139414 A KR1020180139414 A KR 1020180139414A KR 20180139414 A KR20180139414 A KR 20180139414A KR 102646005 B1 KR102646005 B1 KR 102646005B1
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silver
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conductive film
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장상훈
권오병
최형섭
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동우 화인켐 주식회사
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    • C09K13/00Etching, surface-brightening or pickling compositions
    • C09K13/04Etching, surface-brightening or pickling compositions containing an inorganic acid
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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    • C23F1/30Acidic compositions for etching other metallic material
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    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00Etching metallic material by chemical means
    • C23F1/44Compositions for etching metallic material from a metallic material substrate of different composition
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    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1259Multistep manufacturing methods
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    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/121Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs

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Abstract

본 발명은, 조성물 총 중량에 대하여, 인산 40.0 내지 60.0 중량%; 질산 5.0 내지 9.0 중량 %; 질산제이철 0.1 내지 4.0 중량%; 유기산염 0.1 내지 5.0 중량%; 및 잔량의 물을 포함하는 은 함유 박막의 식각액 조성물 및 이를 이용한 표시장치용 어레이기판 및 그 제조방법을 제공한다.The present invention, based on the total weight of the composition, 40.0 to 60.0% by weight of phosphoric acid; 5.0 to 9.0% by weight of nitric acid; 0.1 to 4.0% by weight of ferric nitrate; 0.1 to 5.0% by weight of organic acid salt; and an etchant composition for a silver-containing thin film containing a residual amount of water, an array substrate for a display device using the same, and a method for manufacturing the same.

Description

은 함유 박막 식각액 조성물 및 이를 이용하여 제조된 표시장치용 어레이기판 및 이의 제조방법{ETCHING SOLUTION COMPOSITION FOR SILVER-CONTAINING LAYER, AN ARRAY SUBSTRATE FOR DISPLAY DEVICE USING THE SAME AND MANUFACTURING METHOD FOR THE ARRAY SUBSTRATE FOR DISPLAY DEVICE}Silver-containing thin film etchant composition, array substrate for display device manufactured using the same, and method for manufacturing the same

본 발명은 은 함유 박막 식각액 조성물, 이를 이용하여 제조된 표시장치용 어레이기판 및 이의 제조방법에 관한 것이다.The present invention relates to a silver-containing thin film etchant composition, an array substrate for a display device manufactured using the same, and a method for manufacturing the same.

본격적인 정보화시대로 접어들게 됨에 따라 대량의 정보를 처리 및 표시하는 표시장치 분야가 급속도로 발전해 왔으며, 이에 부응하여 다양한 평판 디스플레이가 개발되어 각광받고 있다. 이러한 평판 표시장치 장치의 예로는 액정디스플레이장치(Liquid Crystal Display device: LCD), 플라즈마 디스플레이장치(Plasma Display Panel device:PDP), 전계방출디스플레이장치(Field Emission Display device: FED), 유기발광소자(Organic Light Emitting Diodes: OLED) 등을 들 수 있다.As we enter the information age, the field of display devices that process and display large amounts of information has developed rapidly, and in response to this, various flat panel displays have been developed and are in the spotlight. Examples of such flat panel display devices include Liquid Crystal Display device (LCD), Plasma Display Panel device (PDP), Field Emission Display device (FED), and Organic Light Emitting Device (Organic Light Emitting Device). Light Emitting Diodes (OLED), etc.

일례로서, OLED는 소자 자체적으로 빛을 발광하면서 저전압에서도 구동될 수있기 때문에 휴대기기 등의 소형 표시장치 시장에 빠르게 적용되고 있을 뿐만 아니라, 표시장치의 대화면화에 대한 트랜드에 따라 대형 TV 등에의 상용화를 목전에 둔 상황이다. 표시장치가 대화면화 되면서, 배선 등이 길어지게 되어 배선 저항이 증가하게 됨에 따라, 저항을 낮추어 표시장치의 대형화 및 고해상도 실현을 가능하게 하는 방법이 요구되고 있다.As an example, OLED is not only rapidly being applied to the small display device market such as portable devices because the device itself emits light and can be driven at low voltage, but is also being commercialized for large-sized TVs according to the trend toward larger screens in display devices. The situation is at hand. As display devices become larger screens, wiring becomes longer and wiring resistance increases. As a result, there is a need for a method of lowering resistance to enable display devices to become larger and have higher resolution.

저항 증가에 의한 신호 지연 등의 문제를 해결하기 위해서는, 상기 배선을 최대한 낮은 비저항을 가지는 재료로 형성할 필요가 있다. 그러한 노력의 일환으로다른 금속들에 비해 낮은 비저항과 높은 휘도, 전도도를 가지고 있는 은(Ag: 비저항 약 1.59μΩ㎝)막, 은합금막 또는 은막이나 은합금막을 포함한 다층막을 컬러필터의 전극, 배선 및 반사막 등에 적용하여 평판 표시장치장치의 대형화와 고해상도 및 저전력 소비 등을 실현하기 위한 노력이 경주되고 있으며, 이러한 재료에 적용하기 위한 식각액이 요구되고 있다.In order to solve problems such as signal delay due to increased resistance, it is necessary to form the wiring with a material having the lowest specific resistance as possible. As part of such efforts, silver (Ag: resistivity approximately 1.59μΩcm) film, silver alloy film, or multilayer film containing silver film or silver alloy film, which has low resistivity, high brightness, and conductivity compared to other metals, was used for color filter electrodes, wiring, and other materials. Efforts are being made to realize larger flat panel displays, higher resolution, and lower power consumption by applying reflective membranes, etc., and etchants for application to these materials are required.

은(Ag) 포함 박막을 이용하는 경우, 저해상도 표시장치에서 은의 재흡착의 발생이 문제되지 않았지만, 고해상도 표시장치 기술에서는 은의 재흡착 이 문제로 대두되고 있는 실정이다. 이와 관련하여 기존에 인산, 초산, 질산을 포함하는 식각액 조성물(한국 등록공보 제 10-0579421호)등으로 은을 포함하는 박막을 식각하는 방법이 개발되었지만, 초산을 포함할 경우 초산의 강한 휘발성에 의해 경시 안정성이 떨어지는 문제가 있었으며, 얼룩이 발생하는 문제 등이 발생하였다.When using a thin film containing silver (Ag), silver re-adsorption is not a problem in low-resolution display devices, but silver re-adsorption is emerging as a problem in high-resolution display technology. In relation to this, a method of etching a thin film containing silver has been developed using an etchant composition containing phosphoric acid, acetic acid, and nitric acid (Korean Registration Publication No. 10-0579421). However, when acetic acid is included, it is difficult to etch due to the strong volatility of acetic acid. As a result, there was a problem of poor stability over time and problems such as staining occurred.

한국 등록특허공보 제 10-0579421호Korean Patent Publication No. 10-0579421

본 발명은, 상기 종래 기술의 문제를 해결하기 위하여 안출된 것으로, 은을 포함하는 금속막의 식각시 경시 안정성 문제가 개선되며, 은 잔사 및 재흡착이 거의 없어 우수한 효과를 나타내며, 직진성이 우수한 은 함유 박막의 식각액 조성물을 제공하는 것을 목적으로 한다.The present invention was developed to solve the problems of the prior art, and improves the problem of stability over time when etching a metal film containing silver, exhibits excellent effects with almost no silver residue and re-adsorption, and contains silver with excellent straightness. The purpose is to provide a thin film etchant composition.

또한, 본 발명은 상기 식각액 조성물을 사용하여 제조된 표시 장치용 어레이기판 및 이의 제조 방법을 제공하는 것을 목적으로 한다.Another object of the present invention is to provide an array substrate for a display device manufactured using the etchant composition and a method for manufacturing the same.

본 발명은, 조성물 총 중량에 대하여, 인산 40.0 내지 60.0 중량%; 질산 5.0 내지 9.0 중량 %; 질산제이철 0.1 내지 4.0 중량%; 유기산염 0.1 내지 5.0 중량%; 및 잔량의 물을 포함하는 은 함유 박막의 식각액 조성물을 제공한다.The present invention, based on the total weight of the composition, 40.0 to 60.0% by weight of phosphoric acid; 5.0 to 9.0% by weight of nitric acid; 0.1 to 4.0% by weight of ferric nitrate; 0.1 to 5.0% by weight of organic acid salt; and a residual amount of water. It provides an etchant composition for a silver-containing thin film.

또한, 본 발명은 a) 기판 상에 게이트 배선을 형성하는 단계;In addition, the present invention includes the steps of a) forming a gate wiring on a substrate;

b) 상기 게이트 배선을 포함한 기판 상에 게이트 절연층을 형성하는 단계;b) forming a gate insulating layer on the substrate including the gate wiring;

c) 상기 게이트 절연층 상에 산화물 반도체층을 형성하는 단계;c) forming an oxide semiconductor layer on the gate insulating layer;

d) 상기 산화물 반도체층 상에 소스 및 드레인 전극을 형성하는 단계; 및d) forming source and drain electrodes on the oxide semiconductor layer; and

e) 상기 드레인 전극에 연결된 화소전극을 형성하는 단계; 를 포함하는 표시장치용 어레이 기판의 제조방법에 있어서,e) forming a pixel electrode connected to the drain electrode; In the method of manufacturing an array substrate for a display device comprising:

상기 e) 단계는 기판 상에 은(Ag) 함유 박막을 형성하고, 청구항 1 의 은 함유 박막의 식각액 조성물로 식각하여 화소전극 또는 반사막을 형성하는 단계를 포함하는 것을 특징으로 하는 표시장치용 어레이기판의 제조방법을 제공한다. Step e) includes forming a silver (Ag)-containing thin film on a substrate and etching it with the etchant composition for the silver-containing thin film of claim 1 to form a pixel electrode or a reflective film. Provides a manufacturing method.

또한, 본 발명은 상술한 식각액 조성물을 사용하여 식각된 표시장치용 어레이기판을 제공한다. Additionally, the present invention provides an array substrate for a display device etched using the above-described etchant composition.

본 발명은, 상기 종래 기술의 문제를 해결하기 위하여 안출된 것으로, 은을 포함하는 금속막의 식각시 경시 안정성 문제가 개선되며, 은 잔사 및 재흡착이 거의 없어 우수한 효과를 나타내며, 직진성이 우수한 은 함유 박막의 식각액 조성물을 제공하는 것을 목적으로 한다.The present invention was developed to solve the problems of the prior art, and improves the problem of stability over time when etching a metal film containing silver, exhibits excellent effects with almost no silver residue and re-adsorption, and contains silver with excellent straightness. The purpose is to provide a thin film etchant composition.

또한, 본 발명은 상기 식각액 조성물을 사용하는 표시 장치용 어레이기판의 제조 방법을 제공한다.Additionally, the present invention provides a method of manufacturing an array substrate for a display device using the etchant composition.

본 발명은, 조성물 총 중량에 대하여, 인산 40.0 내지 60.0 중량%; 질산 5.0 내지 9.0 중량 %; 질산제이철 0.1 내지 4.0 중량%; 유기산염 0.1 내지 5.0 중량%; 및 잔량의 물을 포함하는 은 함유 박막의 식각액 조성물에 대한 것으로, 은을 금속막의 식각시 경시 안정성 문제가 개선되며, 은 잔사 및 재흡착이 거의 없어 우수한 효과를 나타내며, 직진성이 우수한 은 함유 박막의 식각액 조성물을 제공한다.The present invention, based on the total weight of the composition, 40.0 to 60.0% by weight of phosphoric acid; 5.0 to 9.0% by weight of nitric acid; 0.1 to 4.0% by weight of ferric nitrate; 0.1 to 5.0% by weight of organic acid salt; and an etchant composition for silver-containing thin films containing a residual amount of water, which improves the problem of stability over time when etching silver metal films, exhibits excellent effects with almost no silver residue and re-adsorption, and provides excellent straightness for silver-containing thin films with excellent straightness. An etchant composition is provided.

본 발명에서, 은 함유 박막은 은 또는 은합금의 단일막 또는 상기 단일막과 투명전도막으로 구성되는 다층막을 포함할 수 있으며, 이에 제한되지 않는다.In the present invention, the silver-containing thin film may include a single film of silver or a silver alloy or a multilayer film composed of the single film and a transparent conductive film, but is not limited thereto.

본 발명에서, 투명전도막은 산화주석인듐(ITO), 산화아연인듐(IZO), 산화주석아연인듐(ITZO) 및/또는 산화갈륨아연인듐(IGZO)등으로 구성된 군에서 선택되는 1종 이상일 수 있으며, 이에 제한되지 않는다.In the present invention, the transparent conductive film may be one or more types selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), and/or gallium zinc indium oxide (IGZO). , but is not limited to this.

본 발명에서, 은합금은 은(Ag) 및, 니켈(Ni), 구리(Cu), 아연(Zn), 망간(Mn), 크롬(Cr), 주석(Sn), 팔라듐(Pd), 네오디늄(Nd), 니오븀(Nb), 몰리브덴(Mo), 마그네슘(Mg), 텅스텐(W), 프로트악티늄(Pa), 알루미늄(Al) 및 티타늄(Ti)으로부터 선택되는 1종 이상을 포함할 수 있으며, 이에 제한되지 않는다. In the present invention, the silver alloy is silver (Ag), nickel (Ni), copper (Cu), zinc (Zn), manganese (Mn), chromium (Cr), tin (Sn), palladium (Pd), and neodymium. (Nd), niobium (Nb), molybdenum (Mo), magnesium (Mg), tungsten (W), protactinium (Pa), aluminum (Al), and titanium (Ti). , but is not limited to this.

본 발명에서, 단일막과 투명전도막으로 구성되는 다층막은 투명전도막/은, 투명전도막/은 합금, 투명전도막/은/투명전도막 또는 투명전도막/은 합금/투명전도막일 수 있으며, 이에 제한되지 않는다. 상기 투명전도막/은/투명전도막은 a-ITO/AgX/a-ITO 일 수 있으며, 이에 제한되지 않는다. In the present invention, the multilayer film consisting of a single film and a transparent conductive film may be a transparent conductive film/silver, a transparent conductive film/silver alloy, a transparent conductive film/silver/transparent conductive film, or a transparent conductive film/silver alloy/transparent conductive film. , but is not limited to this. The transparent conductive film/silver/transparent conductive film may be a-ITO/AgX/a-ITO, but is not limited thereto.

본 발명의 투명전도막은 산화주석인듐(ITO), 산화아연인듐(IZO), 산화주석아연인듐(ITZO) 및 산화갈륨아연인듐(IGZO)인 것을 특징으로 한다.The transparent conductive film of the present invention is characterized by indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), and gallium zinc indium oxide (IGZO).

본 발명의 식각액에 포함되는 인산(H3PO4)은 주 해리제로 사용되는 성분으로서, 은(Ag)과 투명전도막을 산화시켜 습식 식각하는 역할을 수행한다. Phosphoric acid (H 3 PO 4 ) included in the etching solution of the present invention is a component used as a main dissociation agent and performs a wet etching function by oxidizing silver (Ag) and a transparent conductive film.

그 함량은 식각액 조성물 총중량에 대하여 40.0 내지 60.0 중량% 포함 될 수 있다. 인산의 함량이 40 중량% 미만인 경우에는 은의 식각 속도 저하와 식각 프로파일의 불량을 야기시킬 수 있으며 Ag 재흡착이 증가하게 되고, 60 중량%를 초과하는 경우에는 투명전도막의 식각 속도는 저하되고, 은의 식각 속도는 너무 빨라져 상하부 투명전도막의 팁(Tip)이 발생하게 되어 후속공정에 문제가 되는 불리한 점이 있다. The content may be 40.0 to 60.0% by weight based on the total weight of the etchant composition. If the phosphoric acid content is less than 40% by weight, it may cause a decrease in the etching rate of silver and a defective etching profile, and Ag re-adsorption increases. If the content exceeds 60% by weight, the etching rate of the transparent conductive film decreases and the silver etch rate decreases. The etching speed becomes too fast, causing tips on the upper and lower transparent conductive films, which has the disadvantage of causing problems in subsequent processes.

본 발명의 식각액에 포함되는 질산(HNO3)은 산화제로 사용되는 성분으로서, 은(Ag)과 투명전도막을 산화시켜 습식 식각하는 역할을 수행한다. 그 함량은 식각액 조성물 총중량에 대하여 5.0 내지 9.0 중량% 포함될 수 있다. 질산의 함량이 5.0 중량% 미만인 경우에는 은(Ag)과 ITO의 식각 속도 저하가 발생하며 이로써 기판내의 식각 균일성(Uniformity)이 불량해지므로 얼룩이 발생하며, 9.0 중량%을 초과하는 경우에는 상하부 투명전도막의 식각 속도가 가속화 되어 상하부 투명전도막의 언더컷 발생으로 후속 공정에 문제가 발생되는 불리한 점이 있다.Nitric acid (HNO 3 ) contained in the etching solution of the present invention is an ingredient used as an oxidizing agent, and performs a wet etching function by oxidizing silver (Ag) and a transparent conductive film. The content may be 5.0 to 9.0% by weight based on the total weight of the etchant composition. If the nitric acid content is less than 5.0% by weight, the etching speed of silver (Ag) and ITO decreases, and as a result, the etching uniformity within the substrate becomes poor and stains occur. If the nitric acid content exceeds 9.0% by weight, the top and bottom are transparent. There is a disadvantage in that the etching speed of the conductive film is accelerated and undercuts occur in the upper and lower transparent conductive films, causing problems in subsequent processes.

본 발명의 식각액 중의 질산제이철은 보조 산화제 및 Ag 리간드로 사용되는 성분으로서, 습식 식각 시 박막에 대한 Ag 재흡착을 감소시키고 또한 균일하게 식각되도록 식각 속도를 조절한다. 그 함량은 식각액 조성물 총중량에 대하여 0.1 내지 4.0 중량%으로 포함될 수 있다. 질산제이철 함량이 0.1 중량% 미만인 경우에는 기판 내의 식각 균일성(Uniformity)이 저하되고 또한 기판 내에 부분적으로 은 잔사가 생길 수 있으며, 4.0 중량%를 초과하는 경우에는 식각 속도가 저하되어 원하는 식각 속도를 구현할 수 없다.Ferric nitrate in the etching solution of the present invention is used as an auxiliary oxidizing agent and Ag ligand, and reduces Ag re-adsorption to the thin film during wet etching and also controls the etching rate to ensure uniform etching. The content may be 0.1 to 4.0% by weight based on the total weight of the etchant composition. If the ferric nitrate content is less than 0.1% by weight, the etching uniformity within the substrate may deteriorate and silver residues may partially form within the substrate, and if it exceeds 4.0% by weight, the etching rate decreases, making it difficult to achieve the desired etching rate. It cannot be implemented.

구체적으로 상기 유기산염은 초산, 부탄산, 시트르산, 포름산, 글루콘산, 글리콜산, 말론산, 옥살산, 펜탄산, 메탄술폰산, 설포벤조산, 설포석신산, 설포프탈산, 살리실산, 설포살리실산, 벤조산, 락트산, 글리세르산, 석신산, 말산, 타르타르산, 이소시트르산, 프로펜산, 이미노디아세트산 및 에틸렌디아민테트라아세트산의 칼륨염, 나트륨염 및 암모늄염에서 선택되는 하나 이상일 수 있으며, 초산 칼륨 또는 구연산암모늄인 것이 바람직하며, 초산 칼륨이 보다 바람직하다. Specifically, the organic acid salts include acetic acid, butanoic acid, citric acid, formic acid, gluconic acid, glycolic acid, malonic acid, oxalic acid, pentanoic acid, methanesulfonic acid, sulfobenzoic acid, sulfosuccinic acid, sulfophthalic acid, salicylic acid, sulfosalicylic acid, benzoic acid, and lactic acid. It may be one or more selected from the potassium, sodium and ammonium salts of glyceric acid, succinic acid, malic acid, tartaric acid, isocitric acid, propenoic acid, iminodiacetic acid and ethylenediaminetetraacetic acid, preferably potassium acetate or ammonium citrate. And potassium acetate is more preferable.

본 발명에서, 본 발명에서 사용되는 물은 탈이온수를 의미하며 반도체 공정용을 사용하며, 바람직하게는 18㏁/㎝ 이상의 물을 사용할 수 있다. 잔량의 물은 전체 조성물 총중량이 100 중량%가 되도록 포함된다.In the present invention, the water used in the present invention refers to deionized water and is used for semiconductor processing. Preferably, water of 18 MΩ/cm or more can be used. The remaining amount of water is included so that the total weight of the entire composition is 100% by weight.

본 발명은 초산을 포함하지 않음에도 우수한 직진성 효과를 가지며, 은 재흡착 문제가 개선될 뿐만 아니라, 초산을 포함함으로써 발생되는 문제인 경시 안정성이 저하되는 문제가 현저히 개선된 식각액 조성물을 제공한다.The present invention provides an etchant composition that has an excellent straightness effect even though it does not contain acetic acid, not only improves the silver re-adsorption problem, but also significantly improves the problem of decreased stability over time, which is a problem caused by the inclusion of acetic acid.

본 발명의 식각액은 은 또는 은 합금의 단일막 뿐만 아니라, 투명전도막/ 은, 투명전도막/은 합금의 이중막, 투명전도막/은/투명전도막으로 구성되는 3중막에 대해서도 일괄 에칭도 가능하며, 2 단계 에칭 상부 투명전도막을 다른 식각액으로 에칭 후 본 식각액으로 은(은합금) 및 하부 투명전도막을 에칭 가능하며, 3 단계 에칭 즉 상부 투명전도막을 다른 식각액으로 에칭 후 본 식각액으로 은(은합금) 에칭 후 다른 식각액으로 하부 투명전도막을 에칭하는 공정에서도 사용 가능하다.The etchant of the present invention can collectively etch not only a single film of silver or silver alloy, but also a triple layer consisting of a transparent conductive film/silver, a transparent conductive film/silver alloy double film, and a transparent conductive film/silver/transparent conductive film. This is possible, in 2-step etching, the upper transparent conductive film is etched with another etchant, and then the silver (silver alloy) and the lower transparent conductive film are etched with this etchant. In 3-step etching, that is, the upper transparent conductive film is etched with another etchant, and then the silver (silver alloy) is etched with this etchant. It can also be used in the process of etching the lower transparent conductive film with another etchant after etching (silver alloy).

표시 장치의 제조 시, 배선 및 반사막으로 사용되는 은(Ag) 또는 은합금으로 이루어진 단일막 및 기 단일막과 투명전도막으로 구성된 다층막 대해 본 발명의 식각액 조성물을 사용하는 경우, 패턴부의 배선 및 반사막에 대한 미세 식각 균일성을 나타내고 Pad부 Data배선의 손상으로부터 발생하는 Ag 재흡착 문제도 개선할 수 있다. When manufacturing a display device, when the etchant composition of the present invention is used for a single film made of silver (Ag) or a silver alloy used as a wiring and reflective film, and a multilayer film made of a basic single film and a transparent conductive film, the wiring and reflective film of the pattern portion are used. It shows fine etching uniformity and can also improve the Ag re-adsorption problem that occurs from damage to the pad data wiring.

본 발명은, a) 기판 상에 게이트 배선을 형성하는 단계; b) 상기 게이트 배선을 포함한 기판 상에 게이트 절연층을 형성하는 단계; c) 상기 게이트 절연층 상에 산화물 반도체층을 형성하는 단계; d) 상기 산화물 반도체층 상에 소스 및 드레인 전극을 형성하는 단계; 및 e) 상기 드레인 전극에 연결된 화소전극 또는 반사막을 형성하는 단계; 를 포함하는 표시장치용 어레이 기판의 제조방법에 있어서, 상기 e) 단계는 기판 상에 은(Ag) 함유 박막을 형성하고, 상술한 본 발명의 은 함유 박막의 식각액 조성물로 식각하여 화소전극 또는 반사막을 형성하는 단계를 포함하는 것을 특징으로 하는 표시장치용 어레이기판의 제조방법을 제공한다. The present invention includes the steps of a) forming gate wiring on a substrate; b) forming a gate insulating layer on the substrate including the gate wiring; c) forming an oxide semiconductor layer on the gate insulating layer; d) forming source and drain electrodes on the oxide semiconductor layer; and e) forming a pixel electrode or a reflective film connected to the drain electrode; In the method of manufacturing an array substrate for a display device comprising, step e) forms a silver (Ag)-containing thin film on the substrate, and etches it with the etchant composition for the silver-containing thin film of the present invention described above to form a pixel electrode or a reflective film. It provides a method of manufacturing an array substrate for a display device, comprising the step of forming a.

또한, 본 발명은 상술한 식각액 조성물을 이용하여 제조된 표시장치용 어레이기판을 제공한다.Additionally, the present invention provides an array substrate for a display device manufactured using the above-described etchant composition.

본 발명에서, 상술한 제조방법 및 상술한 식각액 조성물을 이용하여 제조되는 표시장치용 어레이기판은 유기발광소자용(OLED) 및/또는 액정표시장치(LCD)용으로 사용될 수 있으며, 이에 제한 되지 않는다.In the present invention, the array substrate for a display device manufactured using the above-described manufacturing method and the above-described etchant composition may be used for an organic light emitting device (OLED) and/or a liquid crystal display (LCD), but is not limited thereto. .

이하, 본 발명을 실시예 및 비교예를 이용하여 더욱 상세하게 설명한다. 그러나 하기 실시예는 본 발명을 예시하기 위한 것으로서 본 발명은 하기 실시예에 의해 한정되지 않으며, 다양하게 수정 및 변경될 수 있다. 본 발명의 범위는 후술하는 특허청구범위의 기술적 사상에 의해 정해질 것이다.Hereinafter, the present invention will be described in more detail using examples and comparative examples. However, the following examples are for illustrating the present invention, and the present invention is not limited by the following examples and may be modified and changed in various ways. The scope of the present invention will be determined by the technical spirit of the claims described later.

<실시예 및 비교예> 은 식각액 조성물 제조<Examples and Comparative Examples> Preparation of silver etchant composition

하기 표 1 및 표 2에 나타낸 조성 및 함량에 따라 실시예1 내지 실시예10 및 비교예1 내지 비교예8 각각의 식각액 조성물 10㎏을 제조하였으며, 식각액 조성물 총 중량이 100 중량%가 되도록 잔량의 물을 포함하였다.10 kg of each etchant composition of Examples 1 to 10 and Comparative Examples 1 to 8 was prepared according to the composition and content shown in Tables 1 and 2 below, and the remaining amount was added so that the total weight of the etchant composition was 100% by weight. Contains water.

단위:중량%Unit: weight% 인산phosphoric acid 질산 nitric acid 질산제이철Ferric nitrate 유기산염organic acid water 초산칼륨potassium acetate 구연산암모늄ammonium citrate 실시예Example 1One 4343 77 22 22   잔량remaining amount 22 4040 77 22 22   잔량remaining amount 33 6060 77 22 22   잔량remaining amount 44 4343 55 22 22   잔량remaining amount 55 4343 99 22 22   잔량remaining amount 66 4343 77 0.10.1 22   잔량remaining amount 77 4343 77 44 22   잔량remaining amount 88 4343 77 22 0.10.1   잔량remaining amount 99 4343 77 22 55   잔량remaining amount 1010 4343 77 22   22 잔량remaining amount

단위:중량%Unit: weight% 인산phosphoric acid 질산 nitric acid 질산제이철Ferric nitrate 유기산염organic acid water 초산칼륨potassium acetate 비교예Comparative example 1One 3939 77 22 22 잔량remaining amount 22 6161 77 22 22 잔량remaining amount 33 4343 44 22 22 잔량remaining amount 44 4343 1010 22 22 잔량remaining amount 55 4343 77 -- 22 잔량remaining amount 66 4343 77 55 22 잔량remaining amount 77 4343 77 22 -- 잔량remaining amount 88 4343 77 22 66 잔량remaining amount

<실험 예> <Experiment example>

기판 상에 유기 절연막을 증착하고, 그 위에 ITO/Ag/ITO 삼층막을 75 Å / 1000 Å / 50 Å 의 두께로 증착한 것을 다이아몬드 칼을 이용하여 500×600mm로 절단하여 시편 준비를 하였다. An organic insulating film was deposited on the substrate, and an ITO/Ag/ITO trilayer film was deposited on it to a thickness of 75 Å / 1000 Å / 50 Å and cut to 500 × 600 mm using a diamond knife to prepare a specimen.

상기 실시예 1 내지 10 및 비교예 1 내지 8의 식각액 조성물을 사용하여 하기와 같이 성능 테스트를 진행하였다.A performance test was conducted as follows using the etchant compositions of Examples 1 to 10 and Comparative Examples 1 to 8.

실험 예 1: Ag Side etch 평가Experimental Example 1: Ag Side etch evaluation

분사식 식각 방식의 실험장비(모델명: 5.5 ETCHER, 프로웨트 사) 내에 상기 실시 예 1 내지 10 및 비교 예 1 내지 8의 은 식각액 조성물을 각각 넣고, 온도를 40℃로 설정하여 가온 한 후, 온도가 40±0.1℃에 도달하였을 때 상기 시편의 식각 공정을 수행하였다. 총 식각 시간은 85초로 실시하였다. 기판을 넣고 분사를 시작하여 85초의 식각 시간이 다 되면 꺼내어 탈이온수로 세정한 후, 열풍건조장치를 이용하여 건조하고, 포토레지스트 박리기(PR stripper)를 이용하여 포토레지스트를 제거하였다. 세정 및 건조 후 전자주사현미경(SEM; 모델명: SU-8010, HITACHI사 제조)을 이용하여 식각이 된 후 분석을 진행하였고, 하기의 기준으로 평가하였으며, 그 결과를 하기 표 3 및 4에 나타내었다. The silver etchant compositions of Examples 1 to 10 and Comparative Examples 1 to 8 were placed in a spray-etching experiment equipment (model name: 5.5 ETCHER, Prowet Co., Ltd.), and the temperature was set to 40°C and heated. When the temperature reached 40 ± 0.1°C, the etching process of the specimen was performed. The total etching time was 85 seconds. The substrate was placed and spraying was started, and when the etching time of 85 seconds was over, it was taken out, washed with deionized water, dried using a hot air dryer, and the photoresist was removed using a photoresist stripper (PR stripper). After cleaning and drying, it was etched using a scanning electron microscope (SEM; model name: SU-8010, manufactured by HITACHI) and then analyzed. It was evaluated based on the following criteria, and the results are shown in Tables 3 and 4 below. .

[Ag 식각량 평가 기준][Ag etch amount evaluation criteria]

◎ : 매우 우수 (Side Etch : ≤ 0.1㎛)◎: Very good (Side Etch: ≤ 0.1㎛)

○ : 우수 (Side Etch : ≤ 0.2㎛, > 0.1㎛)○: Excellent (Side Etch: ≤ 0.2㎛, > 0.1㎛)

△ : 양호 (Side Etch : ≤ 0.3㎛, > 0.2㎛)△: Good (Side Etch: ≤ 0.3㎛, > 0.2㎛)

Ⅹ : 불량 (Side Etch : > 0.3㎛)Ⅹ: Defective (Side Etch: > 0.3㎛)

실험예 2: 얼룩 평가Experimental Example 2: Stain evaluation

분사식 식각 방식의 실험장비(모델명: 5.5 ETCHER, 프로웨트 사) 내에 상기 실시 예 1 내지 10 및 비교 예 1 내지 8의 은 식각액 조성물을 각각 넣고, 온도를 40℃로 설정하여 가온 한 후, 온도가 40±0.1℃에 도달하였을 때 상기 시편의 식각 공정을 수행하였다. 총 식각 시간은 85초로 실시하였다. 기판을 넣고 분사를 시작하여 85초의 식각 시간이 다 되면 꺼내어 탈이온수로 세정한 후, 열풍건조장치를 이용하여 건조하고, 포토레지스트 박리기(PR stripper)를 이용하여 포토레지스트를 제거하였다. 세정 및 건조 후 광학현미경을 이용하여 식각이 된 후 분석을 진행하였고, 하기의 기준으로 평가하였으며, 그 결과를 하기 표 3 및 4에 나타내었다.The silver etchant compositions of Examples 1 to 10 and Comparative Examples 1 to 8 were placed in a spray-etching experiment equipment (model name: 5.5 ETCHER, Prowet Co., Ltd.), and the temperature was set to 40°C and heated. When the temperature reached 40 ± 0.1°C, the etching process of the specimen was performed. The total etching time was 85 seconds. The substrate was placed and spraying was started, and when the etching time of 85 seconds was over, it was taken out, washed with deionized water, dried using a hot air dryer, and the photoresist was removed using a photoresist stripper (PR stripper). After cleaning and drying, the product was etched using an optical microscope and then analyzed, evaluated based on the following criteria, and the results are shown in Tables 3 and 4 below.

◎ : 발생 無_양호 ◎: No occurrence_good

Ⅹ : 발생 有_불량Ⅹ: Occurrence_defect

실험 예 3: Ag 재흡착 평가 (패드 부 분석)Experimental Example 3: Ag resorption evaluation (pad analysis)

분사식 식각 방식의 실험장비(모델명: 5.5 ETCHER, 프로웨트 사) 내에 상기 실시 예 1 내지 10 및 비교 예 1 내지 8의 은 식각액 조성물을 각각 넣고, 온도를 40℃로 설정하여 가온 한 후, 온도가 40±0.1℃에 도달하였을 때 상기 시편의 식각 공정을 수행하였다. 총 식각 시간은 85초로 실시하였다. 기판을 넣고 분사를 시작하여 85초의 식각 시간이 다 되면 꺼내어 탈이온수로 세정한 후, 열풍건조장치를 이용하여 건조하고, 포토레지스트 박리기(PR stripper)를 이용하여 포토레지스트를 제거하였다. 세정 및 건조 후 전자주사현미경(SEM; 모델명: SU-8010, HITACHI사 제조)을 이용하여 식각이 된 후, 주로 데이터 배선 등 이종 금속이 노출 된 부분이나 굴곡 현상에 의해 마찰이 발생할 수 있는 특정 부위에 식각된 은(Ag)이 흡착되어 있는 현상을 전면 관찰을 통해 분석을 진행하였고, 하기의 기준으로 평가하였으며, 그 결과를 하기 표 3 및 4에 나타내었다.The silver etchant compositions of Examples 1 to 10 and Comparative Examples 1 to 8 were placed in a spray-etching experiment equipment (model name: 5.5 ETCHER, Prowet Co., Ltd.), and the temperature was set to 40°C and heated. When the temperature reached 40±0.1°C, the etching process of the specimen was performed. The total etching time was 85 seconds. The substrate was placed and spraying was started, and when the etching time of 85 seconds was over, it was taken out, washed with deionized water, dried using a hot air dryer, and the photoresist was removed using a photoresist stripper (PR stripper). After cleaning and drying, it is etched using a scanning electron microscope (SEM; model name: SU-8010, manufactured by HITACHI), mainly in areas where dissimilar metals are exposed, such as data wiring, or in specific areas where friction may occur due to bending. The phenomenon of adsorption of etched silver (Ag) was analyzed through overall observation and evaluated based on the following criteria, and the results are shown in Tables 3 and 4 below.

[Ag 재흡착 평가 기준][Ag resorption evaluation criteria]

◎ : 매우 우수 (50개 이하)◎: Very good (50 or less)

○ : 우수 (80개 이하)○: Excellent (80 or less)

△ : 양호 (100개 이하)△: Good (100 or less)

Ⅹ : 불량 (100개 초과)Ⅹ: Defective (exceeding 100)

경시변화(6시간)Change over time (6 hours) 경시변화(12시간)Change over time (12 hours) Ag side etchAg side etch 얼룩stain Ag재흡착Ag resorption Ag side etchAg side etch 얼룩stain Ag 재흡착Ag resorption 실시예Example 1One 22 33 44 55 66 77 88 99 1010

경시변화(6시간)Change over time (6 hours) 경시변화(12시간)Change over time (12 hours) Ag site etchAg site etch 얼룩stain Ag 재흡착Ag resorption Ag site etchAg site etch 얼룩stain Ag 재흡착Ag resorption 비교예Comparative example 1One 22 33 44 55 66 77 88

본원발명의 구성 및 함량을 전부 포함하는 실시예 1 내지 10의 경우, side etch 값이 우수하였고, 얼룩이 발생하지 않았으며, Ag 재흡착 문제가 우수하거나 매우 우수하여 개선된 효과를 보였으며, 경시변화에 따른 식각액 조성물의 효과가 거의 변하지 않음을 확인 하였다. 한편, 본원발명의 구성 및 함량을 만족하지 않는 비교예 1 내지 8은 side etch, 얼룩, 재흡착 효과가 떨어짐을 확인 하였다.In the case of Examples 1 to 10 containing all the composition and content of the present invention, the side etch value was excellent, no staining occurred, the Ag re-adsorption problem was excellent or very excellent, showing an improved effect, and the change over time It was confirmed that the effect of the etchant composition was almost unchanged. On the other hand, it was confirmed that Comparative Examples 1 to 8, which did not satisfy the composition and content of the present invention, had poor side etching, staining, and re-adsorption effects.

Claims (9)

조성물 총 중량에 대하여,
인산 40.0 내지 60.0 중량%;
질산 5.0 내지 9.0 중량 %;
질산제이철 0.1 내지 4.0 중량%;
유기산염 0.1 내지 5.0 중량%; 및
잔량의 물을 포함하며,
초산을 포함하지 않는, 은 함유 박막의 식각액 조성물로,
상기 식각액 조성물은 12시간 경시 후, 75Å/1000Å/50Å 두께의 ITO/Ag/ITO 삼층막을 40±1℃에서 85초 식각시 사이드 에치량이 0.2㎛ 이하인,
은 함유 박막의 식각액 조성물.
With respect to the total weight of the composition,
40.0 to 60.0% by weight of phosphoric acid;
5.0 to 9.0% by weight of nitric acid;
0.1 to 4.0% by weight of ferric nitrate;
0.1 to 5.0% by weight of organic acid salt; and
Contains a residual amount of water,
An etchant composition for silver-containing thin films that does not contain acetic acid,
The etchant composition has a side etch amount of 0.2㎛ or less when etching an ITO/Ag/ITO trilayer film with a thickness of 75Å/1000Å/50Å for 85 seconds at 40±1°C after 12 hours of aging.
Etching solution composition for silver-containing thin films.
청구항 1에 있어서, 상기 유기산염은 초산, 부탄산, 시트르산, 포름산, 글루콘산, 글리콜산, 말론산, 옥살산, 펜탄산, 메탄술폰산, 설포벤조산, 설포석신산, 설포프탈산, 살리실산, 설포살리실산, 벤조산, 락트산, 글리세르산, 석신산, 말산, 타르타르산, 이소시트르산, 프로펜산, 이미노디아세트산 및 에틸렌디아민테트라아세트산의 칼륨염, 나트륨염 및 암모늄염으로 이루어진 군에서 선택되는 1종 이상인 것인, 은 함유 박막의 식각액 조성물.
The method according to claim 1, wherein the organic acid salt is acetic acid, butanoic acid, citric acid, formic acid, gluconic acid, glycolic acid, malonic acid, oxalic acid, pentanoic acid, methanesulfonic acid, sulfobenzoic acid, sulfosuccinic acid, sulfophthalic acid, salicylic acid, sulfosalicylic acid, Silver, which is at least one selected from the group consisting of potassium salts, sodium salts and ammonium salts of benzoic acid, lactic acid, glyceric acid, succinic acid, malic acid, tartaric acid, isocitric acid, propenoic acid, iminodiacetic acid and ethylenediaminetetraacetic acid. Etching solution composition for thin films containing
청구항 1에 있어서, 상기 은 함유 박막은 은 또는 은합금의 단일막 또는 상기 단일막과 투명전도막으로 구성되는 다층막을 포함하는 것을 특징으로 하는 은 함유 박막 식각액 조성물.
The silver-containing thin film etchant composition according to claim 1, wherein the silver-containing thin film comprises a single film of silver or a silver alloy or a multilayer film composed of the single film and a transparent conductive film.
청구항 3에 있어서, 상기 투명전도막은 산화주석인듐(ITO), 산화아연인듐(IZO), 산화주석아연인듐(ITZO) 및 산화갈륨아연인듐(IGZO)중 에서 선택되는 1종 이상인 것을 특징으로 하는 은 함유 박막 식각액 조성물.
The method of claim 3, wherein the transparent conductive film is one or more types selected from indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), and gallium zinc indium oxide (IGZO). Containing thin film etchant composition.
청구항 3에 있어서, 상기 은합금은 은(Ag); 및 니켈(Ni), 구리(Cu), 아연(Zn), 망간(Mn), 크롬(Cr), 주석(Sn), 팔라듐(Pd), 네오디늄(Nd), 니오븀(Nb), 몰리브덴(Mo), 마그네슘(Mg), 텅스텐(W), 프로트악티늄(Pa), 알루미늄(Al) 및 티타늄(Ti)으로 이루어진 군에서 선택되는 1종 이상을 포함하는 것을 특징으로 하는 은 함유 박막의 식각액 조성물.
The method according to claim 3, wherein the silver alloy is silver (Ag); and nickel (Ni), copper (Cu), zinc (Zn), manganese (Mn), chromium (Cr), tin (Sn), palladium (Pd), neodymium (Nd), niobium (Nb), and molybdenum (Mo). ), magnesium (Mg), tungsten (W), protactinium (Pa), aluminum (Al), and titanium (Ti).
청구항 3에 있어서, 상기 단일막과 투명전도막으로 구성되는 다층막은 투명전도막/은, 투명전도막/은 합금, 투명전도막/은/투명전도막 또는 투명전도막/은 합금/투명전도막인 것을 특징으로 하는 은 함유 박막의 식각액 조성물.
The method of claim 3, wherein the multilayer film consisting of a single film and a transparent conductive film is a transparent conductive film/silver, a transparent conductive film/silver alloy, a transparent conductive film/silver/transparent conductive film, or a transparent conductive film/silver alloy/transparent conductive film. An etchant composition for a silver-containing thin film, characterized in that:
a) 기판 상에 게이트 배선을 형성하는 단계;
b) 상기 게이트 배선을 포함한 기판 상에 게이트 절연층을 형성하는 단계;
c) 상기 게이트 절연층 상에 산화물 반도체층을 형성하는 단계;
d) 상기 산화물 반도체층 상에 소스 및 드레인 전극을 형성하는 단계; 및
e) 상기 드레인 전극에 연결된 화소전극을 형성하는 단계; 를 포함하는 표시장치용 어레이 기판의 제조방법에 있어서,
상기 e) 단계는 기판 상에 은(Ag) 함유 박막을 형성하고, 청구항 1 의 은 함유 박막의 식각액 조성물로 식각하여 화소전극 또는 반사막을 형성하는 단계를 포함하는 것을 특징으로 하는 표시장치용 어레이기판의 제조방법.
a) forming gate wiring on the substrate;
b) forming a gate insulating layer on the substrate including the gate wiring;
c) forming an oxide semiconductor layer on the gate insulating layer;
d) forming source and drain electrodes on the oxide semiconductor layer; and
e) forming a pixel electrode connected to the drain electrode; In the method of manufacturing an array substrate for a display device comprising:
Step e) includes forming a silver (Ag)-containing thin film on a substrate and etching it with the etchant composition for the silver-containing thin film of claim 1 to form a pixel electrode or a reflective film. Manufacturing method.
청구항 7에 있어서,
상기 표시장치용 어레이기판은 액정표시장치(LCD)용 또는 유기발광소자(OLED)용인 것을 특징으로 하는 표시장치용 어레이기판의 제조방법.
In claim 7,
A method of manufacturing an array substrate for a display device, characterized in that the array substrate for a display device is for a liquid crystal display (LCD) or an organic light emitting device (OLED).
청구항 1 내지 6 중 어느 하나의 식각액 조성물을 사용하여 식각된 표시장치용 어레이기판.An array substrate for a display device etched using the etchant composition of any one of claims 1 to 6.
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