WO2020080178A1 - エッチング液組成物及びエッチング方法 - Google Patents
エッチング液組成物及びエッチング方法 Download PDFInfo
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- WO2020080178A1 WO2020080178A1 PCT/JP2019/039614 JP2019039614W WO2020080178A1 WO 2020080178 A1 WO2020080178 A1 WO 2020080178A1 JP 2019039614 W JP2019039614 W JP 2019039614W WO 2020080178 A1 WO2020080178 A1 WO 2020080178A1
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- etching
- silver
- acid
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23F—NON-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
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
- H05K3/067—Etchants
Definitions
- the present invention relates to an etching solution composition used for etching a silver-containing material, and an etching method using the same. More specifically, the present invention relates to an etching solution composition for silver-containing materials, which can satisfactorily etch fine-patterned circuit wiring without shape defects, and an etching method using the same.
- a printed wiring board (or film) with a circuit formed on the surface is widely used for mounting electronic parts, semiconductor elements, etc. Many of the wirings used in these printed wiring boards and the like use copper, but wiring using silver is also being actively studied. With the recent demand for miniaturization and high functionality of electronic devices, there has been a demand for thinner printed wiring boards and higher circuit wiring densities. As a method for forming high-density circuit wiring by wet etching, there are methods called a subtractive method and a semi-additive method.
- the side surface of the circuit wiring viewed from above should be straight, the cross section of the circuit wiring should be rectangular, and a high etching factor should be shown.
- the etching rate is fast, the wiring has a desired width, and there is no damage to the substrate or peripheral members.
- Patent Document 1 discloses an etching solution composition containing phosphoric acid, nitric acid, acetic acid, and water, which is used for etching a metal thin film containing silver as a main component.
- Patent Document 2 discloses an etching solution for silver-based thin films in which an aqueous medium contains iodine and iodide.
- Patent Document 3 discloses an etching solution for a silver thin film, which comprises an acidic aqueous solution containing ferric sulfate as an active ingredient.
- Patent Document 4 discloses a silver plating layer solution containing a carboxylic acid compound such as acetic acid and hydrogen peroxide. Note that Patent Document 4 discloses that the content of hydrogen peroxide is higher than that of acetic acid, and that the content of hydrogen peroxide is preferably 900 mL / L or more and 990 mL / L or less. .
- the problems were that the etching rate was slow and that the abdomen of the thin wire often had a large thinness. Further, the solution disclosed in Patent Document 4 needs to be handled with care because high-concentration hydrogen peroxide may explosively decompose. Further, the solution disclosed in Patent Document 4 has a problem that the fine width of the fine line is likely to be large, and thus it is difficult to form a fine pattern and the fine line is easily peeled off from the substrate.
- the present invention has been made to solve the above problems, and its object is to form a thin wire that can etch a silver-containing material at a faster rate and has a narrow abdominal width. Another object of the present invention is to provide an etching solution composition for a silver-containing material that can be obtained. Another object of the present invention is to provide an etching method using the above etching solution composition.
- an etching solution composition used for etching a silver-containing material comprising (A) hydrogen peroxide of 0.1 to 30% by mass and (B) organic carboxylate of 0.05.
- an etching solution composition containing -60% by mass and water and having a pH of 2.5 or more.
- an etching method including a step of etching a silver-containing material using the above etching solution composition.
- an etching solution composition for a silver-containing material that can etch a silver-containing material at a faster rate and that can form a fine line with a narrow abdominal width. it can. Further, according to the present invention, it is possible to provide an etching method using the above etching solution composition.
- etching means a plastic or surface processing technique that utilizes the corrosive action of chemicals or the like.
- Specific applications of the silver-containing material etching solution composition of the present invention include, for example, a removing agent, a surface smoothing agent, a surface roughening agent, a pattern forming agent, and a cleaning solution of a component adhering to a substrate in a trace amount. be able to.
- the etching solution for silver-containing material of the present invention has a high removal rate of a layer containing silver, and thus can be suitably used as a remover.
- the “silver-containing material” in the present specification may be any material containing silver, and examples thereof include metallic silver (silver simple substance); silver alloys such as silver-copper alloys and silver-tin alloys; silver nanowires; Examples thereof include silver nanoparticles, materials containing a conductive polymer and silver, silver chloride, silver oxide and the like.
- the silver-containing material is preferably a material containing 1% by mass or more of silver, and more preferably a material containing 5% by mass or more of silver.
- Examples of the conductive polymer include polymers containing carbon nanotubes, polypyrrole, poly [2-methoxy-5- (3 ′, 7′-dimethyloctyloxy) 1,4-phenylenevinylene] (MDMO-PPV) , 1- (3-methoxycarbonyl) -propyl-1-phenyl [6,6] C61 (PCBM), poly (3-hexyl-thiophene) polymer, poly (3,4-ethylenedioxythiophene) (PeDOT), Examples include poly (styrene sulfonate) (PSS), and combinations of these polymers.
- PCBM 3-methoxycarbonyl) -propyl-1-phenyl [6,6] C61
- PCBM poly (3-hexyl-thiophene) polymer
- PeDOT poly (3,4-ethylenedioxythiophene)
- PSS poly (styrene sulfonate)
- An etching solution composition which is an embodiment of the present invention, is a liquid composition used for etching a silver-containing material, and comprises (A) hydrogen peroxide of 0.1 to 30% by mass, and (B) an organic carbonate. It contains 0.05 to 60 mass% of an acid salt and water, and has a pH of 2.5 or more.
- the concentration of (A) hydrogen peroxide (hereinafter, also referred to as “(A) component”) in the etching liquid composition is 0.1 to 30 mass%. If the concentration of the component (A) is less than 0.1% by mass, the etching rate will be remarkably slow. On the other hand, when the concentration of the component (A) is more than 30% by mass, the etching rate becomes too fast, which makes it difficult to control the etching rate. It is preferable that the concentration of the component (A) is 0.5 to 15% by mass because the etching rate is high in a controllable range.
- the (B) organic carboxylic acid salt (hereinafter, also referred to as “(B) component”) contained in the etching solution composition may be a well-known general organic carboxylic acid salt.
- the component (B) include acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, olein.
- Aliphatic monocarboxylic acids such as acids, linoleic acid, linolenic acid, arachidonic acid, docosahexaenoic acid, eicosapentaenoic acid; oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, fumaric acid, maleic acid
- Aliphatic polycarboxylic acids such as acids; hydroxy acids such as lactic acid, malic acid, citric acid, glycolic acid, tartaric acid and gluconic acid; aromatic monocarboxylic acids such as benzoic acid, salicylic acid, gallic acid and cinnamic acid; phthalic acid , Isophthalic acid, terephthalic acid, trimellitic acid, pyromellitic acid, mellitic acid, biphenyldi
- salts of oxo acids such as pyruvic acid; carboxylic acid, bi
- Examples of the counter cation that constitutes the organic carboxylate include ammonium ions and metal ions, and ammonium ions and ions of alkali metals and alkaline earth metals can be preferably used. Of these, ammonium ion is preferable.
- organic carboxylic acid salts sodium salts of organic carboxylic acids such as monosodium citrate, disodium citrate, trisodium citrate, and sodium acetate; and hydrates thereof; ammonium acetate, triammonium citrate, hydrogen citrate
- organic carboxylic acid ammonium salts such as diammonium and diammonium citrate and hydrates thereof is preferable because the narrow width of the thin wire can be further reduced. Among them, ammonium acetate, triammonium citrate, diammonium hydrogen citrate, diammonium citrate and hydrates thereof are particularly preferable.
- the concentration of the component (B) in the etching liquid composition is 0.05 to 60% by mass. If the concentration of the component (B) is less than 0.05% by mass, the etching rate will be remarkably slowed. On the other hand, if the concentration of the component (B) exceeds 60% by mass, the salt may be difficult to dissolve. It is preferable that the concentration of the component (B) is 0.05 to 50% by mass, because the etching rate is high in a controllable range, and 0.1 to 30% by mass is particularly preferable.
- the etching liquid composition is an aqueous solution containing component (A), component (B), and water, and has a pH of 2.5 or higher.
- a pH of the etching solution composition of 3.5 to 10 is more preferable because the effect of suppressing peeling of fine lines after etching is higher, and a pH of 4 to 9 is particularly preferable. If the pH of the etching solution composition is less than 2.5, the fine wire may be peeled off from the substrate.
- the etching solution composition further contains (C) an organic carboxylic acid (hereinafter, also referred to as “(C) component”).
- the component (C) has the effect of slowing the etching rate. Therefore, by including the component (C), the etching rate can be adjusted, and a very precise fine line can be formed.
- the organic carboxylic acid As the organic carboxylic acid, the same ones as the specific examples of the organic carboxylic acid constituting the component (B) (organic carboxylic acid salt (B)) can be exemplified.
- the component (C) may be the same as or different from the organic carboxylic acid constituting the component (B).
- the concentration of the component (C) in the etching liquid composition is preferably 0.1 to 30% by mass. When the concentration of the component (C) is less than 0.1% by mass, the effect of slowing the etching rate may not be obtained. On the other hand, even if the concentration of the component (C) exceeds 30% by mass, the effect obtained by blending the component (C) is not improved.
- the etching liquid composition contains water.
- water can be used as a solvent, and the etching solution composition can be in the form of an aqueous solution.
- the content of water in the etching liquid composition is preferably the balance depending on the concentrations of the above-mentioned components (A) to (C).
- the content of water in the etching liquid composition is preferably the balance depending on the concentrations of the components (A) to (C) and the additives.
- the etching liquid composition may further contain well-known additives as long as the effects of the present invention are not impaired.
- a reducing agent, a surfactant, a stabilizer for the etching liquid composition, a solubilizer for each component a defoaming agent, a specific gravity adjusting agent, a viscosity adjusting agent, a wettability improving agent, an oxidizing agent, a polyalkylene.
- examples thereof include glycol compounds, azole compounds, pyrimidine compounds, thiourea compounds, alkylpyrrolidone compounds, polyacrylamide compounds, and persulfates.
- concentrations of these additives are generally in the range of 0.001 to 50% by weight, respectively.
- polyalkylene glycol compound examples include polyethylene glycol; polyethylene glycol dimethyl ether; polydiols obtained by block- or random-adding ethylene oxide and propylene oxide to diols such as ethylene glycol, propylene glycol, 1,3-butanol and 1,4-butanol. Mention may be made of alkylene glycols.
- surfactant for example, fluoroalkyl betaine, fluoroalkyl polyoxyethylene ether, and other fluorine-based amphoteric surfactants; nonionic surfactants other than the above polyalkylene glycol compounds can be mentioned.
- azole compound examples include alkylimidazoles such as imidazole, 2-methylimidazole, 2-undecyl-4-methylimidazole, 2-phenylimidazole, and 2-methylbenzimidazole; benzimidazole, 2-methylbenzimidazole, Benzimidazoles such as 2-undecylbenzimidazole, 2-phenylbenzimidazole, and 2-mercaptobenzimidazole; 1,2,3-triazole, 1,2,4-triazole, 5-phenyl-1,2,4 -Triazole, 5-amino-1,2,4-triazole, 1,2,3-benzotriazole, 1-aminobenzotriazole, 4-aminobenzotriazole, 1-bisaminomethylbenzotriazole, 1-methyl-benzotriazo , Triltriazole, 1-hydroxybenzotriazole, 5-methyl-1H-benzotriazole, 5-chlorobenzotriazole and other triazoles; 1H-t
- pyrimidine compounds include diaminopyrimidine, triaminopyrimidine, tetraaminopyrimidine, and mercaptopyrimidine.
- thiourea compounds include thiourea, ethylenethiourea, thiodiglycol, mercaptan and the like.
- alkylpyrrolidone compounds include N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-propyl-2-pyrrolidone, N-butyl-2-pyrrolidone, N-amyl-2-pyrrolidone, N -Hexyl-2-pyrrolidone, N-heptyl-2-pyrrolidone, N-octyl-2-pyrrolidone and the like can be mentioned.
- polyacrylamide compounds examples include polyacrylamide and t-butylacrylamide sulfonic acid.
- persulfates examples include ammonium persulfate, sodium persulfate, and potassium persulfate.
- the etching method according to one embodiment of the present invention includes a step of etching a silver-containing material using the above-mentioned etching solution composition.
- the method of etching the silver-containing material is not particularly limited, and a general etching method may be adopted.
- an etching method such as a dip type, a spray type and a spin type can be mentioned.
- the silver-containing material that is the material to be etched include silver alloys such as silver-copper alloy and silver. Of these, silver is preferred.
- the etching method and conditions are not particularly limited, and various well-known general methods such as a batch method, a flow method, an oxidation-reduction potential of an etchant, a specific gravity, and an auto-control method based on an acid concentration can be adopted.
- the silver-containing material to be etched is usually formed as a film on the substrate.
- the substrate one formed of a material generally used in this technical field can be used. Examples of the material of the substrate include glass, silicon, PP, PE, PET and the like.
- a wiring pattern made of various fine lines can be formed by etching a film formed of a silver-containing material on a substrate with an etching solution composition.
- the etching solution composition according to one embodiment of the present invention can be collectively etched when etching a laminated film. Therefore, it is not necessary to perform selective etching in which the type of the etching solution composition is changed for each layer constituting the laminated coating, and the etching process can be simplified.
- a wiring pattern can be formed by forming a resist pattern corresponding to the wiring pattern on the film and peeling the resist pattern after etching.
- the type of resist is not particularly limited, and a photoresist such as a dry film resist can be used.
- the etching conditions in the dip-type etching method are not particularly limited, and may be set arbitrarily according to the shape of the substrate (etching object), the film thickness, and the like.
- the etching temperature is preferably 10 to 40 ° C., more preferably 20 to 40 ° C.
- the temperature of the etching solution composition may increase due to the heat of reaction. Therefore, if necessary, the temperature of the etching solution composition may be controlled by known means so as to maintain the temperature within the above range.
- the etching time is not particularly limited as long as it is a time sufficient to complete the etching. For example, if the film thickness is about 1 nm to 100 ⁇ m, etching may be performed for about 10 seconds to 1 hour in the above temperature range.
- the etching conditions in the spray-type etching method are not particularly limited, and may be set arbitrarily according to the shape and film thickness of the object to be etched.
- the spraying condition can be selected from the range of 0.01 to 1.0 MPa, preferably 0.02 to 0.1 MPa, and more preferably 0.03 to 0.08 MPa.
- the spray pressure is in the range of 0.03 to 0.08 MPa, the difference between the upper width and the lower width of the thin wire formed is reduced. It is particularly preferable because it can be made very small.
- the etching temperature is preferably 10 to 60 ° C, more preferably 20 to 40 ° C.
- the temperature of the etching solution composition may increase due to the heat of reaction. Therefore, if necessary, the temperature of the etching solution composition may be controlled by known means so as to maintain the temperature within the above range. Further, the etching time is not particularly limited as long as it is a time sufficient to complete the etching. For example, if the film thickness is about 1 nm to 100 ⁇ m, etching may be performed for about 10 seconds to 1 hour in the above temperature range.
- the etching method according to one embodiment of the present invention preferably further has a step of adding a replenishing solution to the etching solution composition in order to recover deterioration of the etching solution composition due to repeated etching.
- a replenishing liquid if a replenishing liquid is set in the etching device in advance, the replenishing liquid can be appropriately added to the etching liquid composition.
- the replenishing liquid for example, an aqueous solution containing the component (A), the component (B), and water, an aqueous solution containing the component (B) and water, and the like can be used.
- the concentration of each component may be about 3 to 20 times the concentration of each component in the etching solution composition.
- the above-mentioned respective components contained in the etching liquid composition as an essential component or as an optional component may be added to the replenishing liquid as required.
- the above-mentioned etching solution composition and etching method it is possible to form a precise circuit wiring having a fine pattern. Therefore, the above-mentioned etching solution composition and etching method can be applied to a printed wiring board for forming electrodes for a touch sensor, a substrate for a package requiring a fine pitch, a subtractive method for COF and TAB applications, and a semi-conductive method. It can be suitably used for the additive method.
- etching liquid composition (1) (Examples 1 to 13)
- the components were mixed so as to have the composition shown in Table 1 to obtain etching liquid compositions (Example compositions Nos. 1 to 13).
- the components other than the component (A) and the component (B) are water added so that the total amount of the etching liquid composition is 100% by mass.
- Example 14 to 26 A resist pattern having a width of 60 ⁇ m and an opening of 60 ⁇ m is formed using a positive type dry film resist on a substrate on which a laminated film (thickness 80 to 100 nm) of metallic silver, silver nanowires, and silver alloy layers is formed on a glass substrate. did.
- the substrate on which the resist pattern was formed was cut into 50 mm ⁇ 50 mm to obtain a test piece.
- Example composition No By using Nos. 1 to 13 and performing etching treatment by a dip method at 35 ° C. under agitation for a time until a residue between wirings cannot be visually confirmed, the evaluation pattern No. 1 to 13 were formed.
- Example composition no Comparative patterns 1 to 6 were formed in the same manner as in Examples 14 to 26 described above, except that Comparative compositions 1 to 6 were used instead of 1 to 13, respectively.
- etching liquid composition (2) (Examples 27 to 31)
- the components were mixed so as to have the composition shown in Table 5 to obtain etching solution compositions (Example compositions Nos. 14 to 18).
- the components other than the component (A), the component (B), and the component (C) are water blended so that the total of the etching liquid composition is 100% by mass.
- Example composition no. Example Composition No. 1 instead of Nos. 1 to 13 Evaluation pattern No. 14 was obtained in the same manner as in Examples 14 to 26 except that the etching liquid compositions of Nos. 14 to 18 were used. 14-18 were formed.
- Examples 37 to 49 A substrate was prepared by laminating, on a glass substrate, a conductive polymer that is a composite of poly (3,4-ethylenedioxythiophene) and polystyrene sulfonic acid and metal silver and silver nanowires. A resist pattern having a width of 60 ⁇ m and an opening of 60 ⁇ m was formed on the prepared substrate using a positive type dry film resist. The substrate on which the resist pattern was formed was cut into 50 mm ⁇ 50 mm to obtain a test piece. About the obtained test piece, Example composition No. By using Nos. 1 to 13 and performing etching treatment by a dip method at 35 ° C. under agitation for a time until a residue between wirings cannot be visually confirmed, the evaluation pattern No. 19 to 31 were formed.
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Abstract
Description
有機カルボン酸塩のなかでも、クエン酸一ナトリウム、クエン酸二ナトリウム、クエン酸三ナトリウム、酢酸ナトリウムなどの有機カルボン酸ナトリウム塩及びこれらの水和物;酢酸アンモニウム、クエン酸三アンモニウム、クエン酸水素二アンモニウム、クエン酸二アンモニウムなどの有機カルボン酸アンモニウム塩及びこれらの水和物を用いると、細線の細り幅をより小さくすることができるために好ましい。なかでも、酢酸アンモニウム、クエン酸三アンモニウム、クエン酸水素二アンモニウム、クエン酸二アンモニウム及びこれらの水和物が特に好ましい。
(実施例1~13)
表1に示す配合となるように各成分を混合してエッチング液組成物(実施例組成物No.1~13)を得た。表1中、(A)成分及び(B)成分以外の成分は、エッチング液組成物の合計が100質量%となるように配合した水である。
表2に示す配合となるように各成分を混合してエッチング液組成物(比較例組成物1~6)を得た。表2中、(A)成分及び(B)成分以外の成分は、エッチング液組成物の合計が100質量%となるように配合した水である。
(実施例14~26)
ガラス基板上に金属銀、銀ナノワイヤー、及び銀合金層の積層膜(厚み80~100nm)を形成した基体上に、ポジ型ドライフィルムレジストを用いて幅60μm、開口部60μmのレジストパターンを形成した。レジストパターンを形成した基体を50mm×50mmに切断してテストピースを得た。得られたテストピースについて、実施例組成物No.1~13を用いて、配線間の残渣が目視で確認できなくなるまでの時間、35℃、撹拌下でディップ式によるエッチング処理を行うことで、評価用パターンNo.1~13を形成した。
実施例組成物No.1~13に代えて、比較例組成物1~6をそれぞれ用いたこと以外は、前述の実施例14~26と同様にして、比較用パターン1~6を形成した。
(評価1)
レーザー顕微鏡を使用して、細線の剥がれ、及びレジストパターンの幅と細線の幅とのズレを評価した。細線の剥がれについては、細線に剥がれが確認されたものを「-」と評価し、細線に剥がれが確認されなかったものを「+」と評価した。また、レジストパターンの幅と細線の幅とのズレについては、下記式(A)から、エッチング処理前のレジストパターンの幅と、形成された細線上部の幅との差の絶対値「L1」を算出して評価した。「L1」の値が「0」である場合は、エッチング処理前のレジストパターンの幅と、形成された細線の幅が同じであり、所望とする幅の細線が形成されたことを意味する。一方、「L1」の値が大きいほど、エッチング処理前のレジストパターンの幅と、形成された細線の幅との差が大きく、所望とする幅の細線が形成されなかったことを意味する。評価結果を表3に示す。
|(エッチング処理前のレジストパターンの幅)-(形成された細線上部の幅)|
・・・(A)
評価1の結果が良好であった評価用パターンNo.3、4、及び8、並びに剥がれが確認されたもののL1が比較的小さい値だった比較用パターン4について、エッチングに要した時間S(配線間の残渣が目視で確認できなくなるまでの時間(秒))を評価した。配線間の残渣が目視で確認できなくなるまでの時間が短いほど、生産性よく細線を形成することができると判断することができる。評価結果を表4に示す。
(実施例27~31)
表5に示す配合となるように各成分を混合してエッチング液組成物(実施例組成物No.14~18)を得た。表5中、(A)成分、(B)成分、及び(C)成分以外の成分は、エッチング液組成物の合計が100質量%となるように配合した水である。
(実施例32~36)
実施例組成物No.1~13に代えて、実施例組成物No.14~18のエッチング液組成物を用いたこと以外は、前述の実施例14~26と同様にして、評価用パターンNo.14~18を形成した。
(評価3)
評価用パターンNo.14~18について、前述の評価1及び評価2と同様の評価を行った。結果を表6に示す。
(実施例37~49)
ガラス基板上に、ポリ(3,4-エチレンジオキシチオフェン)及びポリスチレンスルホン酸からなる複合物である導電性ポリマーに、金属銀及び銀ナノワイヤーを配合した材料を積層した基体を用意した。用意した基体上に、ポジ型ドライフィルムレジストを用いて幅60μm、開口部60μmのレジストパターンを形成した。レジストパターンを形成した基体を50mm×50mmに切断してテストピースを得た。得られたテストピースについて、実施例組成物No.1~13を用いて、配線間の残渣が目視で確認できなくなるまでの時間、35℃、撹拌下でディップ式によるエッチング処理を行うことで、評価用パターンNo.19~31を形成した。
(評価4)
評価用パターンNo.19~31について、前述の評価1と同様にして、エッチング処理前のレジストパターンの幅と、形成された細線上部の幅との差の絶対値「L1」を算出して評価した。評価結果を表7に示す。
Claims (3)
- 銀含有材料をエッチングするために用いられるエッチング液組成物であって、
(A)過酸化水素0.1~30質量%、
(B)有機カルボン酸塩0.05~60質量%、及び
水を含有し、
pHが2.5以上であるエッチング液組成物。 - さらに、(C)有機カルボン酸0.1~30質量%を含有する請求項1に記載のエッチング液組成物。
- 請求項1又は2に記載のエッチング液組成物を用いて銀含有材料をエッチングする工程を有するエッチング方法。
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- 2019-10-08 WO PCT/JP2019/039614 patent/WO2020080178A1/ja active Application Filing
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