WO2019140809A1 - 一种蚀刻液组合物 - Google Patents

一种蚀刻液组合物 Download PDF

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Publication number
WO2019140809A1
WO2019140809A1 PCT/CN2018/086092 CN2018086092W WO2019140809A1 WO 2019140809 A1 WO2019140809 A1 WO 2019140809A1 CN 2018086092 W CN2018086092 W CN 2018086092W WO 2019140809 A1 WO2019140809 A1 WO 2019140809A1
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Prior art keywords
etching
acid
mass ratio
liquid composition
etching liquid
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French (fr)
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李嘉
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US16/074,777 priority Critical patent/US20190323129A1/en
Publication of WO2019140809A1 publication Critical patent/WO2019140809A1/zh
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    • 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
    • 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
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/16Acidic compositions
    • C23F1/18Acidic compositions for etching copper or alloys thereof
    • 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
    • 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
    • C23F1/10Etching compositions
    • 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
    • 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
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • 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
    • 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
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/16Acidic compositions
    • C23F1/26Acidic compositions for etching refractory metals
    • 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
    • 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
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/32Alkaline compositions
    • C23F1/34Alkaline compositions for etching copper or alloys thereof
    • 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
    • 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
    • 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
    • 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
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/32Alkaline compositions
    • C23F1/40Alkaline compositions for etching other metallic material

Definitions

  • the present invention relates to the field of display technologies, and in particular, to an etchant composition.
  • a microcircuit such as a semiconductor device, a TFT-LCD, or an OLED is uniformly coated on a conductive metal film such as aluminum, aluminum alloy, copper, or copper alloy formed on a substrate, or an insulating film such as a silicon oxide film or a silicon nitride film.
  • the photoresist is then imaged by light after being patterned, and the desired pattern photoresist is imaged, and the pattern is displayed on the metal film or the insulating film under the photoresist by dry etching or wet etching. After that, it is completed by stripping off a series of lithography processes such as unnecessary photoresist.
  • the copper alloy used for the gate of the large display and the data metal wiring has lower impedance and no environmental problems than the aluminum-chromium wiring in the prior art. Since copper has a low adhesion to a glass substrate and an insulating film and is easily diffused into a silicon oxide film, titanium, molybdenum or the like is generally used as the lower thin film metal.
  • the etching uniformity is difficult to control, and the characteristics such as etching cone angle, etching deviation, and etching straightness are lost, thereby affecting product quality.
  • An object of the present invention is to provide an etching liquid composition which can adjust an etching rate and avoid loss of characteristics such as etching cone angle, etching deviation, and etching straightness, thereby improving product quality.
  • the present invention provides an etchant composition, wherein the etchant composition comprises: hydrogen peroxide, an etch inhibitor, a chelating agent, an etch additive, a fluoride, a stabilizer, and water; wherein the etchant combination
  • the mass ratio of the hydrogen peroxide is 4%-25%, the mass ratio of the etching inhibitor is 6%-10%, and the mass ratio of the chelating agent is 0.01%-20%.
  • the mass of the etching additive is 0.01%-20%, the mass ratio of the fluoride is 0.01%-20%, and the mass ratio of the stabilizer is 0.01%-5%, the quality of the water.
  • the ratio is such that the total mass ratio of the etching liquid composition is 100%;
  • the etching inhibitor is one or more of a heterocyclic aromatic compound, a heterocyclic aliphatic compound, an aromatic polyhydric alcohol, an amine monohydrate, a quinoline, and a linear structural polyol; the stabilizer is ethylene One or more of alcohol, propylene glycol, polyethylene glycol, polypropylene glycol, ethanol, and isopropanol.
  • the mass ratio of the chelating agent may be 6% to 20% in the etching liquid composition.
  • the mass ratio of the etching additive may be 6% to 20% in the etching liquid composition.
  • the mass ratio of the fluoride may be 6% to 20% in the etching liquid composition.
  • the mass ratio of the stabilizer may be 3% to 5% in the etching liquid composition.
  • the etching additive is one or more of an organic acid, an inorganic acid, an organic acid salt, and a mineral acid salt.
  • the chelating agent is iminodiacetic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, methylenephosphonic acid, hydroxyethylidene diphosphate, and One or more of diaminetetraacetic acid, diethylenetriamine, sarcosine, alanine, aminobutyric acid, glutamic acid, glycine, 1-diphosphonic acid, organic polyphosphonic acid, ethylenediaminetetraacetic acidkind.
  • the fluoride is a compound which decomposes fluoride ions.
  • the present invention provides an etchant composition
  • an etchant composition comprising: hydrogen peroxide, an etch inhibitor, a chelating agent, an etch additive, a fluoride, a stabilizer, and water; wherein, in the etchant composition
  • the mass ratio of the hydrogen peroxide is 4%-25%
  • the mass ratio of the etching inhibitor is 6%-10%
  • the mass ratio of the chelating agent is 0.01%-20%.
  • the mass of the etching additive is 0.01%-20%
  • the mass ratio of the fluoride is 0.01%-20%
  • the mass ratio of the stabilizer is 0.01%-5%
  • the mass ratio of the water is In order to make the total mass ratio of the etching liquid composition 100%.
  • the mass ratio of the chelating agent may be 6% to 20% in the etching liquid composition.
  • the mass ratio of the etching additive may be 6% to 20% in the etching liquid composition.
  • the mass ratio of the fluoride may be 6% to 20% in the etching liquid composition.
  • the mass ratio of the stabilizer may be 3% to 5% in the etching liquid composition.
  • the etching inhibitor is one of a heterocyclic aromatic compound, a heterocyclic aliphatic compound, an aromatic polyhydric alcohol, an amine monohydrate, a quinoline, a linear structural polyol or A variety.
  • the etching additive is one or more of an organic acid, an inorganic acid, an organic acid salt, and a mineral acid salt.
  • the chelating agent is iminodiacetic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, methylenephosphonic acid, hydroxyethylidene diphosphate, and One or more of diaminetetraacetic acid, diethylenetriamine, sarcosine, alanine, aminobutyric acid, glutamic acid, glycine, 1-diphosphonic acid, organic polyphosphonic acid, ethylenediaminetetraacetic acidkind.
  • the stabilizer is one or more selected from the group consisting of ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, ethanol, and isopropyl alcohol.
  • the fluoride is a compound which decomposes fluoride ions.
  • the etching liquid composition of the present invention comprises hydrogen peroxide, an etching inhibitor, a chelating agent, an etching additive, a fluoride, a stabilizer and water by adjusting the quality of each component in the etching liquid composition.
  • the ratio is increased to improve the uniformity of etching of the etching liquid composition, thereby avoiding loss of characteristics such as etching cone angle, etching deviation, and etching straightness, thereby improving product quality.
  • the etching liquid composition of the embodiment of the present invention can simultaneously etch a copper/molybdenum film or a copper/molybdenum alloy film.
  • copper/molybdenum film means a single film of a copper film and a molybdenum film
  • copper/molybdenum alloy film means a copper film and a molybdenum alloy film
  • the molybdenum alloy is an alloy of molybdenum and various metals, preferably with titanium
  • An alloy of ruthenium, chromium, iridium, nickel, indium or tin is more preferably an alloy with titanium.
  • the etching liquid composition of the embodiment of the present invention comprises: hydrogen peroxide, an etching inhibitor, a chelating agent, an etching additive, a fluoride, a stabilizer, and water.
  • the mass ratio of hydrogen peroxide is 4% to 25%
  • the mass ratio of the etching inhibitor is 6% to 10%
  • the mass ratio of the chelating agent is 0.01% to 20%.
  • the mass of the etching additive is 0.01%-20%
  • the mass ratio of the fluoride is 0.01%-20%
  • the mass ratio of the stabilizer is 0.01%-5%
  • the mass ratio of water is the ratio of the etching liquid.
  • the total mass of the matter is 100%.
  • hydrogen peroxide is used as the main oxidant of copper molybdenum or copper molybdenum alloy.
  • the mass ratio of hydrogen peroxide is 4% to 25%.
  • the mass ratio of hydrogen peroxide is less than 4%, the acidification of the copper-molybdenum alloy is insufficient, so that etching cannot be achieved; when the mass ratio of hydrogen peroxide exceeds 25%, the etching speed is too fast, thereby It is difficult to control the progress of the project.
  • the etching inhibitor can adjust the etching speed of the copper molybdenum or copper molybdenum alloy to have an etching profile having an appropriate taper angle.
  • the mass of the etch inhibitor is 6% to 10%.
  • the mass ratio of the etching inhibitor is less than 6%, the performance of the adjustable cone angle is weakened; when the mass ratio of the etching inhibitor exceeds 10%, the etching speed is slowed, thereby affecting the engineering efficiency.
  • the etching inhibitor may be a heterocyclic aromatic compound, a heterocyclic aliphatic compound, an aromatic polyhydric alcohol, an amine monohydrate, a quinoline, or a linear structural polyol. One or more.
  • the heterocyclic aromatic compound may be furan, thiophene, pyrrole, oxazole, thiazole, pyrazole, triazole, tetrazole, benzofuran, phenyl thiophene, anthracene, benzothiazole, phenylimidazole , phenylpyrazole, aminotetrazole, methyl, etc.;
  • the heterocyclic aliphatic compound may be pyridazine, methylpyrazine, pyrrolidine, alloxan, etc.;
  • the aromatic polyol may be gallic acid, methyl The acid ester, ethyl ester, propoxide, butyl ester, etc.;
  • the linear structural polyol may be a polyol from glycerin, erythritol, sorbitol, mannitol, xylitol, and the like.
  • the chelating agent forms a chelate and deactivates the copper and molybdenum alloy ions during the etching, thereby suppressing the decomposition reaction of hydrogen peroxide in the etching solution. If no chelating agent is added to the etching liquid composition of the embodiment of the present invention, the acidified metal ions cannot be deactivated during the etching process, which promotes the decomposition reaction of hydrogen peroxide in the etching liquid composition. Can cause heat and explosion.
  • the mass ratio of the chelating agent is 0.01% to 20%; more preferably, the mass ratio of the chelating agent is 6% to 20%.
  • the mass ratio of the chelating agent is less than 0.01% in the etching liquid composition, the amount of inactivated metal ions is small, so that the effect of suppressing the decomposition reaction of hydrogen peroxide is weakened; if the chelating agent is When the mass ratio exceeds 20%, excessive sequestration is formed, and the effect of inactivating metal ions is not good, which affects engineering efficiency.
  • the chelating agent may be iminodiacetic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, methylenephosphonic acid, hydroxyethylidene Diphosphate, ethylenediaminetetraacetic acid, diethylenetriamine, sarcosine, alanine, aminobutyric acid, glutamic acid, glycine, 1-diphosphonic acid, organic polyphosphonic acid, ethylenediaminetetraacetic acid One or more.
  • an etching additive may be further included.
  • the etching additive may be a surfactant for improving etching performance.
  • the mass of the etch additive is 0.01% to 20%; more preferably, the etch additive has an intelligence ratio of 6% to 20%.
  • the etching additive may be one or more of an organic acid, an inorganic acid, an organic acid salt, and a mineral acid salt.
  • the organic acid may be acetic acid, formic acid, butyric acid, citric acid, glycolic acid, oxalic acid, malonic acid, valeric acid, propionic acid, tartaric acid, gluconic acid, glycine, succinic acid, succinic acid, alkyl dimethyl Sulfonic acid, alkylbenzenesulfonic acid, alkyldiphenyl ether disulfonic acid, alkylnaphthalenesulfonic acid, naphthalenesulfonic acid, naphthalenesulfonic acid, formaldehyde and naphthalenesulfonic acid polymer, acrylamide methylpropanesulfonic acid polymerization a sulfonic acid group or a sulfonate compound of acrylic acid or a vinylbenzenesulfonic acid polymer; the inorganic acid may be nitric acid, sulfuric acid, hydrochloric acid, hypochlorous acid,
  • the etching rate of the molybdenum alloy can be increased, the length of the tail can be reduced, and the molybdenum alloy residue generated during etching can be removed. If the tail of the molybdenum alloy is increased, the brightness will be lowered, and if the residue remains on the substrate and the lower film, electrical short-circuit, poor wiring, and reduced brightness will be caused, so the residue must be removed.
  • the mass ratio of the fluoride is from 0.01% to 20%; more preferably, the mass ratio of the fluoride is from 6% to 20%. When the mass ratio of the fluoride is less than 0.01%, the residue of the molybdenum alloy cannot be effectively removed; when the mass ratio of the fluoride exceeds 20%, the lower film is etched.
  • the fluoride in the embodiment of the present invention is a compound that decomposes fluoride ions, and may be cesium fluoride, sodium fluoride, potassium fluoride, aluminum fluoride, borofluoric acid, ammonium fluoride, ammonium hydrogen fluoride, sodium hydrogen fluoride, One or two or more kinds of the above-mentioned fluorides may be used together with potassium fluorohydride, ammonium fluoroborate or the like.
  • the stabilizer acts to control the decomposition of hydrogen peroxide when the etching process is repeated and the metal ion content in the etching liquid is high.
  • the amine compound suppresses the decomposition reaction of hydrogen peroxide which occurs with an increased concentration of metal ions in an etching process, and has an effect of maintaining etching characteristics for a long period of time.
  • the etching stabilizer used in the present invention has a large hydrophilicity and has an effect of suppressing the occurrence of metal residue.
  • the etchant combination species has a mass ratio of the stabilizer of 0.01% to 5%; more preferably, the mass ratio of the stabilizer is 3% to 5%.
  • the stabilizer may be one or more of ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, ethanol, and isopropyl alcohol.
  • a copper/molybdenum alloy film for an electrode such as a TFT-LCD display or an OLED can be etched, and when etching a copper/molybdenum film or a copper/molybdenum alloy film, even when the etching process is repeated, even Increasing the concentration of metal ions in the etching solution can also stabilize the metal ions, control the decomposition reaction of hydrogen peroxide, increase the number of repetitions of the etching process, increase the etching capacity, and maintain the etching cone angle, etching deviation, and etching straightness. Etching characteristics, thereby reducing the amount of etching solution used in the etching process, can greatly reduce the manufacturing cost of TFT-LCD, OLED, and the like.

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  • General Chemical & Material Sciences (AREA)
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Abstract

一种蚀刻液组合物,包含:过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水;其中,过氧化氢的质量占比为4%-25%,蚀刻抑制剂的质量占比为6%-10%,螯合剂的质量占比为0.01%-20%,蚀刻添加剂的质量占比为0.01%-20%,氟化物的质量占比为0.01%-20%,稳定剂的质量占比为0.01%-5%,水的质量占比为使蚀刻液组合物的总质量占比为100%;蚀刻抑制剂为杂环芳香族化合物、杂环脂肪族化合物、芳香族多元醇、一水合胺、喹啉、直链结构多元醇中的一种或多种;稳定剂为乙二醇,丙二醇,聚乙二醇,聚丙乙稀二醇,乙醇,异丙醇中的一种或多种。

Description

一种蚀刻液组合物 技术领域
本发明涉及显示技术领域,尤其涉及一种蚀刻液组合物。
背景技术
半导体装置、TFT-LCD、OLED 等微电路是通过在基板上形成的铝、铝合金、铜及铜合金等导电性金属膜或二氧化硅膜、氮化硅薄膜等绝缘膜上,均匀地涂抹光刻胶,然后通过刻有图案的薄膜,进行光照射后成像,使所需的图案光刻胶成像,采用干式蚀刻或湿式蚀刻,在光刻胶下部的金属膜或绝缘膜上显示图案后,剥离去除不需要的光刻胶等一系列的光刻工程而完成的。
大型显示器的栅极及数据金属配线所使用的铜合金,与以往技术中的铝铬配线相比,阻抗低且没有环境问题。铜存在与玻璃基板及绝缘膜的贴附性较低,易扩散为氧化硅膜等问题,所以通常使用钛、钼等作为下部薄膜金属。
但是,现有的蚀刻液在蚀刻过程中,其蚀刻的均一性很难把控,从而导致蚀刻锥角、蚀刻偏差及蚀刻直线度等特性失去,进而影响产品品质。
技术问题
本发明的目的在于提供一种蚀刻液组合物,可以调节蚀刻速度,避免蚀刻锥角、蚀刻偏差及蚀刻直线度等特性失去,进而提高产品品质。
技术解决方案
为实现上述目的,本发明提供的技术方案如下:
本发明提供一种蚀刻液组合物,其中,所述蚀刻液组合物包含:过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水;其中,在所述蚀刻液组合物中,所述过氧化氢的质量占比为4%-25%,所述蚀刻抑制剂的质量占比为6%-10%,所述螯合剂的质量占比为0.01%-20%,所述蚀刻添加剂的质量占比为0.01%-20%,所述氟化物的质量占比为0.01%-20%,所述稳定剂的质量占比为0.01%-5%,所述水的质量占比为使所述蚀刻液组合物的总质量占比为100%;
所述蚀刻抑制剂为杂环芳香族化合物、杂环脂肪族化合物、芳香族多元醇、一水合胺、喹啉、直链结构多元醇中的一种或多种;所述稳定剂为乙二醇,丙二醇,聚乙二醇,聚丙乙稀二醇,乙醇,异丙醇中的一种或多种。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述螯合剂的质量占比还可以为6%-20%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述蚀刻添加剂的质量占比还可以为6%-20%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述氟化物的质量占比还可以为6%-20%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述稳定剂的质量占比还可以为3%-5%。
在本发明的蚀刻液组合物中,所述蚀刻添加剂为有机酸、无机酸、有机酸盐、无机酸盐中的一种或多种。
在本发明的蚀刻液组合物中,所述螯合剂为亚氨基二乙酸、次氨基三乙酸、乙二胺四醋酸、二乙烯三胺五乙酸、亚甲基磷酸、羟基乙叉二磷酸,乙二胺四乙酸,二乙三胺,肌氨酸,丙氨酸,氨基丁酸,谷氨酸,甘氨酸,1-二膦酸,有机多元膦酸,乙二胺四乙酸中的一种或多种。
在本发明的蚀刻液组合物中,所述氟化物是离解出氟离子的化合物。
本发明提供一种蚀刻液组合物,所述蚀刻液组合物包含:过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水;其中,在所述蚀刻液组合物中,所述过氧化氢的质量占比为4%-25%,所述蚀刻抑制剂的质量占比为6%-10%,所述螯合剂的质量占比为0.01%-20%,所述蚀刻添加剂的质量占比为0.01%-20%,所述氟化物的质量占比为0.01%-20%,所述稳定剂的质量占比为0.01%-5%,所述水的质量占比为使所述蚀刻液组合物的总质量占比为100%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述螯合剂的质量占比还可以为6%-20%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述蚀刻添加剂的质量占比还可以为6%-20%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述氟化物的质量占比还可以为6%-20%。
在本发明的蚀刻液组合物中,在所述蚀刻液组合物中,所述稳定剂的质量占比还可以为3%-5%。
在本发明的蚀刻液组合物中,所述蚀刻抑制剂为杂环芳香族化合物、杂环脂肪族化合物、芳香族多元醇、一水合胺、喹啉、直链结构多元醇中的一种或多种。
在本发明的蚀刻液组合物中,所述蚀刻添加剂为有机酸、无机酸、有机酸盐、无机酸盐中的一种或多种。
在本发明的蚀刻液组合物中,所述螯合剂为亚氨基二乙酸、次氨基三乙酸、乙二胺四醋酸、二乙烯三胺五乙酸、亚甲基磷酸、羟基乙叉二磷酸,乙二胺四乙酸,二乙三胺,肌氨酸,丙氨酸,氨基丁酸,谷氨酸,甘氨酸,1-二膦酸,有机多元膦酸,乙二胺四乙酸中的一种或多种。
在本发明的蚀刻液组合物中,所述稳定剂为乙二醇,丙二醇,聚乙二醇,聚丙乙稀二醇,乙醇,异丙醇中的一种或多种。
在本发明的蚀刻液组合物中,所述氟化物是离解出氟离子的化合物。
有益效果
本发明的有益效果是:本发明蚀刻液组合物包含过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水,通过调整各组分在该蚀刻液组合物中的质量占比以提高该蚀刻液组合物蚀刻的均一性,从而可以避免蚀刻锥角、蚀刻偏差及蚀刻直线度等特性失去,进而提高产品品质。
本发明的最佳实施方式
本发明实施例的蚀刻液组合物可同时蚀刻铜/钼膜或铜/钼合金膜。这里的“铜/钼膜”是指铜膜和钼膜单一膜;“铜/ 钼合金膜”是指铜膜和钼合金膜,钼合金是钼和多种金属的合金,优选为与钛、钽、铬、钕、镍、铟或锡的合金,更优选为与钛的合金。
本发明实施例的蚀刻液组合物包含:过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水。其中,在该蚀刻液组合物中,过氧化氢的质量占比为4%-25%,蚀刻抑制剂的质量占比为6%-10%,螯合剂的质量占比为0.01%-20%,蚀刻添加剂的质量占比为0.01%-20%,氟化物的质量占比为0.01%-20%,稳定剂的质量占比为0.01%-5%,水的质量占比为使蚀刻液组合物的总质量占比为100%。
在本发明实施例的蚀刻液组合物中,过氧化氢作为铜钼或铜钼合金的主要氧化剂。优选的,在该蚀刻液组合物中,过氧化氢的质量占比为4%-25% 。当过氧化氢的质量占比不足4%时,就会对铜钼合金的酸化不够充分,从而无法实现蚀刻;当过氧化氢的质量占比超出25% 时,蚀刻速度就会过快,从而难以控制工程的进度。
本发明实施例的蚀刻液组合物中,蚀刻抑制剂可以调节铜钼或铜钼合金蚀刻速度,使其成为具有适当锥角的蚀刻轮廓。优选的,在该蚀刻液组合物种,蚀刻抑制剂的质量占比为6%至10% 。当蚀刻抑制剂的质量占比不足6% 时,可调节锥角的性能就会减弱;当蚀刻抑制剂的质量占比超过10%时,蚀刻速度就会变慢,进而影响工程效率。
进一步的,在本发明实施例的蚀刻液组合物中,蚀刻抑制剂可以为杂环芳香族化合物、杂环脂肪族化合物、芳香族多元醇、一水合胺、喹啉、直链结构多元醇中的一种或多种。具体地说,该杂环芳香族化合物可以为呋喃,噻吩,吡咯,恶唑,噻唑,吡唑,三唑,四唑,苯亚呋喃,苯亚噻吩,吲哚,苯亚噻唑,苯亚咪唑,苯亚吡唑,氨基四唑,甲基等;该杂环脂肪族化合物可以为呱嗪,甲基呱嗪,吡咯烷,四氧嘧啶等;该芳香族多元醇可以为五倍子酸,甲基酸脂,乙酯,丙醇盐,丁基脂等;该直链结构多元醇可以为多元醇从甘油,赤藓糖醇,山梨糖醇,甘露醇,木糖醇等。
在本发明实施例的蚀刻液组合物中,螯合剂与在蚀刻过程中产生铜及钼合金离子形成螯合,并使其非活性化,从而抑制蚀刻液中过氧化氢的分解反应。若本发明实施例的蚀刻液组合物中不添加螯合剂,那么在蚀刻进行过程中,被酸化的金属离子无法实现非活性化,其可促进蚀刻液组合物中的过氧化氢进行分解反应,可导致发热及爆炸。优选的,在该蚀刻液组合物中,螯合剂的质量占比为0.01 %- 20%;更优选的,螯合剂的质量占比为6%至20%。若在该蚀刻液组合物中,螯合剂的质量占比不足0.01% 时,可进行非活性化的金属离子量很少,从而使其抑制过氧化氢进行分解反应的效能减弱;若螯合剂的质量占比超出20%时,就会形成多余的螯合,使金属离子非活性化的效果不佳,影响工程效率。
进一步的,在本发明实施例的蚀刻液组合物中,螯合剂可为亚氨基二乙酸、次氨基三乙酸、乙二胺四醋酸、二乙烯三胺五乙酸、亚甲基磷酸、羟基乙叉二磷酸,乙二胺四乙酸,二乙三胺,肌氨酸,丙氨酸,氨基丁酸,谷氨酸,甘氨酸,1-二膦酸,有机多元膦酸,乙二胺四乙酸中的一种或多种。
在本发明实施例的蚀刻液组合物中,为了提高其蚀刻性能,还可以包含一种蚀刻添加剂。该蚀刻添加剂可为用于提高蚀刻性能的表面活性剂。优选的,在该蚀刻液组合物种,蚀刻添加剂的质量占比为0.01%至20% ;更优选的,蚀刻添加剂的智力占比为6%至20%。具体地,该蚀刻添加剂可以为有机酸、无机酸、有机酸盐、无机酸盐中的一种或多种。其中,有机酸可以为醋酸、甲酸、丁酸、柠檬酸、乙醇酸、草酸、丙二酸、戊酸、丙酸、酒石酸、葡萄糖酸、甘氨酸、琥珀酸、丁二酸、烷基二甲基磺酸、烷基苯磺酸,烷基二苯醚二磺酸、烷基萘磺酸、萘磺酸、,奈二磺酸、甲醛与萘磺酸聚合物、丙烯酰胺甲基丙烷磺酸聚合物、丙烯酸、乙烯基苯磺酸聚合物的磺酸基或磺酸盐化合物等;无机酸可以为硝酸、硫酸、盐酸、次氯酸、高锰酸、磷酸、硼酸、次硫酸、高氯酸、过一硫酸、过二硫酸、过二碳酸等。
本发明实施例的蚀刻液组合物中,氟化物在铜钼合金同时蚀刻时,可提高钼合金的蚀刻速度,减少尾巴长度,去除在蚀刻时所产生的钼合金残渣。钼合金的尾部若增加则会降低明暗度,残渣若余留在基板及下部膜上的话,则会导致电短路、配线不良及明暗度降低,所以一定要去除残渣。优选的,在该蚀刻液组合物中,氟化物的质量占比为0.01%至 20% ;更优选,氟化物的质量占比为6%至20%。当氟化物的质量占比不足 0.01% 时,钼合金的残渣不能有效去除;当氟化物的质量占比超出20% 时,就会蚀刻下部膜。
进一步的,本发明实施例的氟化物是离解出氟离子的化合物,可为氟化铪、氟化钠、氟化钾、氟化铝、硼氟酸、氟化铵、氟化氢铵、氟化氢钠、氟氢化钾及氟硼酸铵等,也可以同时使用一种或两种以上的上述氟化物。
在本发明的蚀刻液组合物中,稳定剂是在反复进行蚀刻工程,蚀刻液内部的金属离子含量较高时,起到用以控制过氧化氢分解的作用。胺类化合物可抑制在蚀刻工程中,随着所增加的金属离子浓度而发生的过氧化氢分解反应,具有长期维持蚀刻特性的效果。在本发明中所使用的蚀刻稳定剂,其亲水性较大,具有抑制金属残渣发生的效果。优选的,该蚀刻液组合物种,稳定剂的质量占比为0.01%至5% ;更优选的,稳定剂的质量占比为3%至5%。
进一步的,该稳定剂可以为乙二醇,丙二醇,聚乙二醇,聚丙乙稀二醇,乙醇,异丙醇中的一种或多种。
利用本发明的蚀刻液组合物,可蚀刻用于 TFT-LCD 显示器或 OLED 等电极的铜/钼合金膜,在蚀刻铜/钼膜或铜/钼合金膜时,在蚀刻工程反复进行时,即使蚀刻液内的金属离子的浓度增加,也可使金属离子稳定,控制过氧化氢的分解反应,增加蚀刻工程的反复次数,增加蚀刻容量,同时也可以维持蚀刻锥角、蚀刻偏差及蚀刻直线度等蚀刻特性,从而减少蚀刻工程中的蚀刻液的用量,可大幅度减少 TFT-LCD、OLED 等的制造费用。
综上所述,虽然本发明已以优选实施例揭露如上,但上述优选实施例并非用以限制本发明,本领域的普通技术人员,在不脱离本发明的精神和范围内,均可作各种更动与润饰,因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种蚀刻液组合物,其中,所述蚀刻液组合物包含:过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水;其中,在所述蚀刻液组合物中,所述过氧化氢的质量占比为4%-25%,所述蚀刻抑制剂的质量占比为6%-10%,所述螯合剂的质量占比为0.01%-20%,所述蚀刻添加剂的质量占比为0.01%-20%,所述氟化物的质量占比为0.01%-20%,所述稳定剂的质量占比为0.01%-5%,所述水的质量占比为使所述蚀刻液组合物的总质量占比为100%;
    所述蚀刻抑制剂为杂环芳香族化合物、杂环脂肪族化合物、芳香族多元醇、一水合胺、喹啉、直链结构多元醇中的一种或多种;所述稳定剂为乙二醇,丙二醇,聚乙二醇,聚丙乙稀二醇,乙醇,异丙醇中的一种或多种。
  2. 根据权利要求1所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述螯合剂的质量占比还可以为6%-20%。
  3. 根据权利要求1所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述蚀刻添加剂的质量占比还可以为6%-20%。
  4. 根据权利要求1所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述氟化物的质量占比还可以为6%-20%。
  5. 根据权利要求1所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述稳定剂的质量占比还可以为3%-5%。
  6. 根据权利要求1所述的蚀刻液组合物,其中,所述蚀刻添加剂为有机酸、无机酸、有机酸盐、无机酸盐中的一种或多种。
  7. 根据权利要求1所述的蚀刻液组合物,其中,所述螯合剂为亚氨基二乙酸、次氨基三乙酸、乙二胺四醋酸、二乙烯三胺五乙酸、亚甲基磷酸、羟基乙叉二磷酸,乙二胺四乙酸,二乙三胺,肌氨酸,丙氨酸,氨基丁酸,谷氨酸,甘氨酸,1-二膦酸,有机多元膦酸,乙二胺四乙酸中的一种或多种。
  8. 根据权利要求1所述的蚀刻液组合物,其中,所述氟化物是离解出氟离子的化合物。
  9. 一种蚀刻液组合物,其中,所述蚀刻液组合物包含:过氧化氢、蚀刻抑制剂、螯合剂、蚀刻添加剂、氟化物、稳定剂以及水;其中,在所述蚀刻液组合物中,所述过氧化氢的质量占比为4%-25%,所述蚀刻抑制剂的质量占比为6%-10%,所述螯合剂的质量占比为0.01%-20%,所述蚀刻添加剂的质量占比为0.01%-20%,所述氟化物的质量占比为0.01%-20%,所述稳定剂的质量占比为0.01%-5%,所述水的质量占比为使所述蚀刻液组合物的总质量占比为100%。
  10. 根据权利要求9所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述螯合剂的质量占比还可以为6%-20%。
  11. 根据权利要求9所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述蚀刻添加剂的质量占比还可以为6%-20%。
  12. 根据权利要求9所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述氟化物的质量占比还可以为6%-20%。
  13. 根据权利要求9所述的蚀刻液组合物,其中,在所述蚀刻液组合物中,所述稳定剂的质量占比还可以为3%-5%。
  14. 根据权利要求9所述的蚀刻液组合物,其中,所述蚀刻抑制剂为杂环芳香族化合物、杂环脂肪族化合物、芳香族多元醇、一水合胺、喹啉、直链结构多元醇中的一种或多种。
  15. 根据权利要求9所述的蚀刻液组合物,其中,所述蚀刻添加剂为有机酸、无机酸、有机酸盐、无机酸盐中的一种或多种。
  16. 根据权利要求9所述的蚀刻液组合物,其中,所述螯合剂为亚氨基二乙酸、次氨基三乙酸、乙二胺四醋酸、二乙烯三胺五乙酸、亚甲基磷酸、羟基乙叉二磷酸,乙二胺四乙酸,二乙三胺,肌氨酸,丙氨酸,氨基丁酸,谷氨酸,甘氨酸,1-二膦酸,有机多元膦酸,乙二胺四乙酸中的一种或多种。
  17. 根据权利要求9所述的蚀刻液组合物,其中,所述稳定剂为乙二醇,丙二醇,聚乙二醇,聚丙乙稀二醇,乙醇,异丙醇中的一种或多种。
  18. 根据权利要求9所述的蚀刻液组合物,其中,所述氟化物是离解出氟离子的化合物。
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CN112647079A (zh) * 2020-12-03 2021-04-13 湖北兴福电子材料有限公司 一种金属钨和铜的选择性蚀刻液
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CN115852372A (zh) * 2022-11-23 2023-03-28 江阴江化微电子材料股份有限公司 一种液晶面板铜钛蚀刻液及蚀刻方法
CN116288351B (zh) * 2023-03-23 2025-10-21 艾森半导体材料(南通)有限公司 一种蚀刻液组合物及其应用
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