WO2020241338A1 - 電解めっき液用添加剤、電解めっき液、電解めっき方法及び新規化合物 - Google Patents
電解めっき液用添加剤、電解めっき液、電解めっき方法及び新規化合物 Download PDFInfo
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- WO2020241338A1 WO2020241338A1 PCT/JP2020/019591 JP2020019591W WO2020241338A1 WO 2020241338 A1 WO2020241338 A1 WO 2020241338A1 JP 2020019591 W JP2020019591 W JP 2020019591W WO 2020241338 A1 WO2020241338 A1 WO 2020241338A1
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- electrolytic plating
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- 0 C*(*)C(C)(C)**(C(C)(C)[N+](C)[O-])I Chemical compound C*(*)C(C)(C)**(C(C)(C)[N+](C)[O-])I 0.000 description 1
- SENLDUJVTGGYIH-UHFFFAOYSA-N NCCNC(CCN(CCC(NCCN)=O)CCN(CCC(NCCN)=O)CCC(NCCN)=O)=O Chemical compound NCCNC(CCN(CCC(NCCN)=O)CCN(CCC(NCCN)=O)CCC(NCCN)=O)=O SENLDUJVTGGYIH-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C237/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups
- C07C237/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton
- C07C237/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
- C07C237/10—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atom of at least one of the carboxamide groups bound to an acyclic carbon atom of a hydrocarbon radical substituted by nitrogen atoms not being part of nitro or nitroso groups
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/10—Agitating of electrolytes; Moving of racks
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/30—Electroplating: Baths therefor from solutions of tin
- C25D3/32—Electroplating: Baths therefor from solutions of tin characterised by the organic bath constituents used
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/46—Electroplating: Baths therefor from solutions of silver
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/12—Semiconductors
- C25D7/123—Semiconductors first coated with a seed layer or a conductive layer
Definitions
- the present invention relates to an additive for an electrolytic plating solution containing a compound having a specific structure, an electrolytic plating solution containing the additive for the electrolytic plating solution, an electrolytic plating method using the electrolytic plating solution, and a novel compound.
- Electroplating is one of the typical methods for embedding metal.
- electrolytic copper plating in which copper is embedded as a metal is widely known.
- an accelerator, an inhibitor, a smoothing agent, and the like are added to the electrolytic plating solution.
- Patent Document 1 discloses that a smoothing agent such as polyethyleneimine and polyvinylpyrrolidone is added to an electrolytic copper plating aqueous solution for embedding fine copper wiring.
- Patent Document 1 does not disclose or suggest the effect when the additive for the electrolytic plating solution of the present invention and the electrolytic plating solution containing the additive are used.
- the present invention is an additive for an electrolytic plating solution containing a compound represented by the following general formula (1).
- R 1 to R 3 each independently represent a group represented by the following general formula (2), A 1 represents an alkanediyl group having 2 to 4 carbon atoms, and n is 0 or 1. Represents.
- R 4 and R 5 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- a 2 and A 3 each independently represent an alkane diyl having 2 to 4 carbon atoms.
- m represents an integer from 1 to 4
- * represents a bond.
- the present invention is an electrolytic plating solution containing the above-mentioned additive for an electrolytic plating solution.
- the present invention is an electrolytic plating method using the above electrolytic plating solution.
- the present invention is a compound represented by the following general formula (3).
- R 11 to R 13 each independently represent a group represented by the following general formula (4), A 11 represents an alkanediyl group having 2 to 4 carbon atoms, and p is 0 or 1. Represents.
- R 14 and R 15 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- a 12 and A 13 each independently represent an alkanedyl having 2 to 4 carbon atoms. It represents a group, q represents an integer of 1 to 4, and * represents a bond. However, when A 11 is an alkanediyl group having 2 carbon atoms, q represents an integer of 2 to 4).
- an additive for an electrolytic plating solution capable of obtaining a metal layer having few defects on the side wall of the metal layer and having excellent surface flatness.
- the additive for an electrolytic plating solution of the present invention contains a compound represented by the above general formula (1).
- R 1 to R 3 each independently represent a group represented by the above general formula (2)
- a 1 represents an alkanediyl group having 2 to 4 carbon atoms
- n represents 0 or 1.
- Examples of the alkanediyl group having 2 to 4 carbon atoms represented by A 1 include an ethylene group, a propylene group, and a butylene group.
- a 1 is preferably an ethylene group or a propylene group because a metal layer having more excellent surface flatness can be formed.
- R 4 and R 5 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- a 2 and A 3 independently represent 2 to 2 carbon atoms, respectively. It represents an alkanediyl group of 4
- m represents an integer of 1 to 4
- * represents a bond.
- Examples of the alkyl group having 1 to 4 carbon atoms represented by R 4 and R 5 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a tertiary butyl group. Can be mentioned.
- Examples of the alkanediyl group having 2 to 4 carbon atoms represented by A 2 and A 3 include an ethylene group, a propylene group, and a butylene group. Since a metal layer having more excellent surface flatness can be formed, R 4 and R 5 are preferably hydrogen atoms or methyl groups, and A 2 and A 3 are preferably ethylene groups.
- the compound represented by the above general formula (1) is not particularly limited by the production method thereof, and is produced by applying a well-known reaction.
- a compound represented by the above general formula (1) can be obtained by reacting methyl alkenate with an amine compound having a corresponding structure and then reacting an amine compound having another corresponding structure. it can. Specifically, for example, by reacting methyl acrylate with diethylenetriamine and then further reacting with ethylenediamine, compound No. 1 can be obtained.
- the surface of the substrate to be plated has a fine structure.
- the metal can be embedded in the grooves and holes with good surface flatness, defects with a depth of 10 ⁇ m or more are less likely to occur on the side wall, and a metal layer having excellent surface flatness can be formed.
- the step of forming a copper layer on the substrate to be plated by the electrolytic plating method using the electrolytic copper plating solution containing the additive for the electrolytic plating solution of the present invention is performed, defects generated on the side wall of the obtained copper layer are generated.
- the additive for electrolytic plating solution of the present invention is particularly suitable as an additive for electrolytic copper plating solution. Further, even if a metal layer is formed at high speed by an electrolytic plating method using an electrolytic plating solution containing an additive for an electrolytic plating solution of the present invention, a metal layer having few defects on the side wall and excellent surface flatness can be obtained. Can be formed.
- the electroplating solution of the present invention is an aqueous solution containing an additive for an electroplating solution containing the compound represented by the above general formula (1) as an essential active ingredient.
- the concentration of the compound represented by the above general formula (1) is preferably 0.01 mg / L to 100 mg / L in the electrolytic plating solution, preferably 0.1 mg. It is more preferably / L to 30 mg / L, and most preferably 0.5 mg / L to 10 mg / L.
- the electrolytic plating solution of the present invention contains at least one alcohol compound selected from methanol, ethanol, n-propanol, and isopropanol. It is preferable to contain it.
- methanol is preferable because it can form a metal layer having particularly excellent surface flatness.
- the alcohol compound is preferably blended in an amount of 1 g to 100 g, more preferably 5 g to 50 g, with respect to 1 g of the compound represented by the general formula (1).
- the electrolytic plating solution of the present invention contains metal salts and electrolytes, which are metal supply sources, as well as chloride ion sources and plating promotion, as components other than the above-mentioned electrolytic plating solution additives, like the conventionally known electrolytic plating solutions. It may contain an agent, a plating inhibitor, and the like.
- the metal of the metal salt used in the electroplating solution of the present invention is not particularly limited as long as it is a metal capable of forming a film by the electroplating method, and examples thereof include copper, tin, and silver.
- examples thereof include copper, tin, and silver.
- the electrolytic plating solution of the present invention is used as the electrolytic copper plating solution, a copper layer having excellent surface flatness can be formed.
- the copper salt blended in the electrolytic copper plating solution include copper sulfate, copper acetate, copper fluoroborate, and copper nitrate.
- examples of the inorganic acid which is an electrolyte used in the electrolytic plating solution of the present invention include sulfuric acid, phosphoric acid, nitric acid, hydrogen halide, sulfamic acid, boric acid, fluoroboric acid and the like.
- the electrolytic plating solution of the present invention contains copper sulfate as a metal salt and sulfuric acid as an electrolyte, it is preferable because a copper layer having very excellent surface flatness can be formed.
- the concentration of copper sulfate (as CuSO 4 ⁇ 5H 2 O), in the electrolytic plating solution is preferably 50g / L ⁇ 500g / L, 100g It is more preferably / L to 350 g / L, and the concentration of sulfuric acid in the electrolytic plating solution is preferably 20 g / L to 400 g / L, and more preferably 30 g / L to 150 g / L. ..
- a chloride ion source can be blended in order to form a uniform and smooth metal layer.
- concentration of the chloride ion source is preferably 5 mg / L to 200 mg / L, more preferably 20 mg / L to 150 mg / L in the electrolytic plating solution.
- the chloride ion source is not particularly limited, and examples thereof include hydrogen chloride and sodium chloride.
- the electrolytic plating solution of the present invention may contain a plating accelerator (brightening agent) such as an organic compound containing a sulfur element and a salt compound thereof.
- a plating accelerator such as an organic compound containing a sulfur element and a salt compound thereof.
- the plating accelerator include compounds represented by the following general formulas (5) to (7).
- R is an alkyl group which may be optionally substituted, preferably an alkyl group having 1 to 6 carbon atoms, and more preferably 1 to 6 carbon atoms.
- the alkyl group of 4 is an optionally substituted aryl group, eg, an optionally optionally substituted phenyl or naphthyl group, X is a counterion, eg, sodium or potassium. Is.
- R 21 and R 22 have a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, and a substituent having 1 to 3 carbon atoms. It is a good cycloalkyl group having 5 to 9 carbon atoms or an aryl group which may have a substituent having 1 to 3 carbon atoms, and M represents an alkali metal, ammonium or monovalent organic ammonium.
- n represents a number from 1 to 7)
- sodium 3,3'-dithiobis (1-propanesulfonic acid) (hereinafter, may be abbreviated as SPS) is used as a plating accelerator from the viewpoint of having a high effect of promoting the formation of a metal layer. preferable.
- the concentration of these plating accelerators is preferably 0.1 mg / L to 100 mg / L, more preferably 0.3 mg / L to 50 mg / L, and 0.5 mg / L in the electrolytic plating solution. Most preferably, it is L to 10 mg / L.
- a plating inhibitor to the electrolytic plating solution of the present invention.
- an oxygen-containing polymer organic compound can be used, and specifically, polyethylene glycol, polypropylene glycol, polyoxyethylene-polyoxypropylene random copolymer, polyoxyethylene-polyoxypropylene block copolymer. And so on.
- polyethylene glycol is preferable.
- the molecular weight of these oxygen-containing polymer organic compounds is preferably 500 to 100,000, more preferably 1,000 to 10,000.
- polyethylene glycol having a molecular weight of 1,000 to 10,000 is most preferable.
- the concentration of the oxygen-containing polymer organic compound is preferably 50 mg / L to 5,000 mg / L, more preferably 100 mg / L to 3,000 mg / L in the electrolytic plating solution. preferable.
- additives include anthraquinone derivatives, cationic surfactants, nonionic surfactants, anionic surfactants, amphoteric surfactants, alkane sulfonic acid, alcan sulfonate, alkane sulfonic acid ester, hydroxyalcan sulfone. Examples thereof include acids, hydroxyalcan sulfonates, hydroxyalcan sulfonic acid esters, and hydroxyalcan sulfonic acid organic acid esters.
- concentration of these other additives is preferably 0.1 mg / L to 500 mg / L, more preferably 0.5 mg / L to 100 mg / L in the electrolytic plating solution.
- electrolytic plating method using the electrolytic plating solution of the present invention will be described.
- the electroplating method of the present invention may be carried out in the same manner as the conventional electroplating method except that the electroplating solution of the present invention is used as the electroplating solution.
- an electrolytic copper plating method for forming a copper layer on a substrate to be plated will be described.
- the electrolytic plating apparatus for example, a paddle stirring type plating apparatus may be used.
- the electrolytic copper plating solution of the present invention is filled in the plating tank of the electrolytic plating apparatus, and the substrate to be plated is immersed in the electrolytic copper plating solution.
- the substrate to be plated for example, a resist pattern formed on a Si substrate with a copper seed layer using a photoresist can be used.
- the temperature of the electrolytic copper plating solution is 10 ° C. to 70 ° C., preferably 20 ° C. to 60 ° C.
- the current density is 1 A / dm 2 to 70 A / dm 2 , preferably 5 A / dm 2 to. 50A / dm 2, more preferably in the range of 15A / dm 2 ⁇ 35A / dm 2.
- the method for stirring the electrolytic plating solution air stirring, rapid liquid flow stirring, mechanical stirring using a stirring blade or the like can be used.
- the plated products manufactured by using the electrolytic plating method of the present invention are not particularly limited, but for example, automobile industrial materials (heat sinks, carburetor parts, fuel injectors, cylinders, various valves, engine internals, etc.). , Electronic industry materials (contacts, circuits, semiconductor packages, printed circuit boards, thin film resistors, capacitors, hard disks, magnetic materials, lead frames, nuts, magnets, resistors, stems, computer parts, electronic parts, laser oscillators, optical memory elements , Thin film, filter, thermistor, heating element, high temperature heating element, varistor, magnetic head, various sensors (gas, temperature, humidity, light, speed, etc.), MEMS, etc.), precision equipment (copying machine parts, optical equipment parts, (Watch parts, etc.), aviation / ship materials (hydraulic equipment, screws, engines, turbines, etc.), chemical industry materials (balls, gates, plugs, checks, etc.), various molds, machine tools, vacuum equipment parts, etc.
- automobile industrial materials heat sinks, carb
- the electrolytic plating method of the present invention is preferably used for electronic industrial materials that require particularly fine patterns, and more particularly preferably used in the production of semiconductor packages and printed circuit boards represented by TSV formation, bump formation, and the like. Preferably, it is most preferably used in a semiconductor package.
- the novel compound of the present invention is a compound represented by the above general formula (3), and when added to an electrolytic plating solution, a metal layer having few defects on the side walls and good surface flatness can be obtained. Suitable as an additive for electrolytic plating solution. Further, the novel compound of the present invention has few defects on the side wall of the obtained copper layer when added to the electrolytic copper plating solution and has particularly good surface flatness. Therefore, the novel compound is particularly good as an additive for the electrolytic copper plating solution. Is suitable.
- R 11 to R 13 each independently represent a group represented by the above general formula (4), and A 11 represents an alkanediyl group having 2 to 4 carbon atoms, p. Represents 0 or 1.
- Examples of the alkanediyl group having 2 to 4 carbon atoms represented by A 11 include an ethylene group, a propylene group, and a butylene group.
- An ethylene group or a propylene group is preferable as A 11 because a metal layer having more excellent surface flatness can be formed.
- R 14 and R 15 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- a 12 and A 13 independently represent 2 to 2 carbon atoms, respectively. It represents an alkanediyl group of 4
- q represents an integer of 1 to 4
- * represents a bond.
- a 11 is an alkanediyl group having 2 carbon atoms
- q represents an integer of 2 to 4.
- Examples of the alkyl group having 1 to 4 carbon atoms represented by R 14 and R 15 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a tertiary butyl group. Can be mentioned.
- Examples of the alkanediyl group having 2 to 4 carbon atoms represented by A 12 and A 13 include an ethylene group, a propylene group, and a butylene group.
- a hydrogen atom or a methyl group is preferable as R 14 and R 15
- an ethylene group is preferable as A 12 and A 13 , because a metal layer having more excellent surface flatness can be formed.
- Examples of the novel compound represented by the above general formula (3) of the present invention include the above-mentioned compound No. 5 to No. 8 and No. 13-No. 24 is mentioned.
- the novel compound represented by the above general formula (3) of the present invention is not particularly limited by the production method thereof, and is produced by applying a well-known reaction. For example, by reacting methyl alkenate with an amine compound having a corresponding structure and then reacting another amine compound having a corresponding structure, a novel compound represented by the above general formula (3) can be obtained. it can. Specifically, for example, by reacting methyl acrylate with tris (2-aminoethyl) amine and then further reacting with diethylenetriamine, compound No. 13 can be obtained.
- Example 1 Compound No. Synthesis of No. 5 A product was obtained under the same conditions as in Synthesis Example 1 except that diethylenetriamine was used instead of ethylenediamine. 1 As a result of 1 H-NMR and elemental analysis, the product obtained is Compound No. It was identified as 5. The results of these analyzes are shown below.
- Example 5 to 15 As an additive for the electrolytic plating solution, Compound No. 1, No. 2. No. 5, No. 9, No. 10, No. 13, No. 17 and No. 21 was used to prepare an electrolytic copper plating solution having the composition shown in Table 1.
- the solvent of the electrolytic copper plating solution was water, and the concentration of each component was adjusted with water.
- PEG4000 used in the examples is polyethylene glycol having a weight average molecular weight of 3,600 to 4,400.
- Comparative Examples 1 to 3 As the additives for the electrolytic plating solution, the following comparative compounds 1 and 2 were used to prepare an electrolytic copper plating solution having the composition shown in Table 2.
- the solvent of the electrolytic copper plating solution was water, and the concentration of each component was adjusted with water.
- PEG4000 used in the comparative example is polyethylene glycol having a weight average molecular weight of 3,600 to 4,400.
- a paddle stirring type plating device was used as the electrolytic plating device, and the electrolytic copper plating solutions of Examples 5 to 15 and Comparative Examples 1 to 3 were filled in the plating tank of the paddle stirring type plating device, respectively.
- the substrate to be plated was immersed in each electrolytic copper plating solution.
- a resist pattern shape: having an opening having a circular cross section, opening diameter: 200 ⁇ m
- copper was embedded in the resist opening by an electrolytic copper plating method under the following plating conditions to form a copper layer on the substrate to be plated.
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Abstract
Description
本発明の電解めっき液用添加剤は、上記一般式(1)で表される化合物を含有する。
次に、本発明の電解めっき液について説明する。本発明の電解めっき液は、上記一般式(1)で表される化合物を含有する電解めっき液用添加剤を必須の有効成分として含有する水溶液である。本発明の効果をより向上させる観点から、上記一般式(1)で表される化合物の濃度は、電解めっき液中において、0.01mg/L~100mg/Lであることが好ましく、0.1mg/L~30mg/Lであることがより好ましく、0.5mg/L~10mg/Lであることが最も好ましい。
次に、本発明の電解めっき液を用いた電解めっき方法について説明する。本発明の電解めっき方法は、電解めっき液として本発明の電解めっき液を使用する他は従来の電解めっき方法と同様に行えばよい。ここでは、被めっき基体上に銅層を形成する電解銅めっき方法について説明する。
200mLの3つ口フラスコに、メタノール(24.2g)及びアクリル酸メチル(12.8g)をAr雰囲気下で加え、十分混合した。この溶液を0℃に冷却した後、ジエチレントリアミン(2.6g)とメタノール(23.9g)との混合物を、Ar雰囲気下で滴下した。室温で48時間撹拌後、減圧下、オイルバス60℃にてメタノール及び未反応物を除去し中間体を得た。300mLの3つ口フラスコに、メタノール(48.2g)及びエチレンジアミン(41.1g)をAr雰囲気下で加え、十分混合した。この溶液を0℃に冷却した後、上記中間体(5.0g)とメタノール(24.0g)との混合物を、Ar雰囲気下で滴下した。室温で72時間撹拌後、減圧下、オイルバス60℃にてメタノール及び未反応物を除去し生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.1と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.25ppm(10H、t)、2.82ppm(10H、t)、2.72ppm(10H、t)、2.63ppm(8H、s)、2.45ppm(10H、t)
(2)元素分析(理論値)
C:51.9質量%(51.69質量%)、H:9.2質量%(9.42質量%)、N:27.2質量%(27.02質量%)、O:11.7質量%(11.87質量%)
エチレンジアミンの代わりにN,N-ジメチルエチレンジアミンを用いたこと以外は合成例1と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.2と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.32ppm(10H、t)、2.80ppm(10H、t)、2.61ppm(8H、s)、2.51ppm(10H、t)、2.42ppm(10H、t)、2.25ppm(30H、s)
(2)元素分析(理論値)
C:57.8質量%(57.53質量%)、H:10.0質量%(10.28質量%)、N:22.4質量%(22.36質量%)、O:9.8質量%(9.83質量%)
エチレンジアミンの代わりにジエチレントリアミンを用いたこと以外は合成例1と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.5と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.32ppm(10H、t)、2.82ppm(10H、t)、2.68ppm(38H、m)、2.44ppm(10H、t)
(2)元素分析(理論値)
C:52.8質量%(52.68質量%)、H:9.7質量%(9.98質量%)、N:28.3質量%(28.35質量%)、O:9.2質量%(9.00質量%)
ジエチレントリアミンの代わりにトリス(2-アミノエチル)アミンを用いたこと以外は合成例1と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.9と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.25ppm(12H、t)、2.82ppm(12H、t)、2.72ppm(12H、t)、2.64ppm(12H、s)、2.45ppm(12H、t)
(2)元素分析(理論値)
C:52.3質量%(52.03質量%)、H:9.2質量%(9.46質量%)、N:27.0質量%(26.96質量%)、O:11.5質量%(11.55質量%)
エチレンジアミンの代わりにN,N-ジメチルエチレンジアミンを用いたこと以外は合成例3と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.10と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.32ppm(12H、t)、2.80ppm(12H、t)、2.62ppm(12H、s)、2.50ppm(12H、t)、2.42ppm(12H、t)、2.24ppm(36H、s)
(2)元素分析(理論値)
C:57.9質量%(57.68質量%)、H:10.0質量%(10.29質量%)、N:22.4質量%(22.42質量%)、O:9.7質量%(9.60質量%)
エチレンジアミンの代わりにジエチレントリアミンを用いたこと以外は合成例3と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.13と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.32ppm(12H、t)、2.82ppm(12H、t)、2.67ppm(48H、m)、2.44ppm(12H、t)
(2)元素分析(理論値)
C:53.2質量%(52.92質量%)、H:9.6質量%(9.99質量%)、N:28.1質量%(28.28質量%)、O:9.1質量%(8.81質量%)
ジエチレントリアミンの代わりにジプロピレントリアミンを用いたこと以外は合成例1と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.17と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.24ppm(10H、t)、2.80ppm(10H、t)、2.72ppm(10H、t)、2.46ppm(18H、m)、1.65ppm(4H、m)
(2)元素分析(理論値)
C:53.2質量%(53.04質量%)、H:9.5質量%(9.62質量%)、N:26.0質量%(25.94質量%)、O:11.3質量%(11.40質量%)
ジエチレントリアミンの代わりにトリス(3-アミノプロピル)アミンを用いたこと以外は製造例1と同様の条件で生成物を得た。1H-NMR及び元素分析の結果、得られた生成物は化合物No.21と同定された。これらの分析結果を以下に示す。
(1)1H-NMR(D2O)
3.24ppm(12H、t)、2.80ppm(12H、t)、2.72ppm(12H、t)、2.46ppm(24H、m)、1.63ppm(6H、m)
(2)元素分析(理論値)
C:53.8質量%(53.64質量%)、H:9.5質量%(9.70質量%)、N:25.6質量%(25.67質量%)、O:11.1質量%(10.99質量%)
電解めっき液用添加剤として、化合物No.1、No.2、No.5、No.9、No.10、No.13、No.17及びNo.21を用いて、表1に示す組成で電解銅めっき液を調製した。なお、実施例5~15において、電解銅めっき液の溶媒は水であり、各成分の濃度は水で調整した。また、実施例で用いたPEG4000は、3,600~4,400の重量平均分子量を有するポリエチレングリコールである。
電解めっき液用添加剤として、下記比較化合物1及び2を用いて、表2に示す組成で電解銅めっき液を調製した。なお、比較例1~3において、電解銅めっき液の溶媒は水であり、各成分の濃度は水で調整した。また、比較例で用いたPEG4000は、3,600~4,400の重量平均分子量を有するポリエチレングリコールである。
電解めっき装置として、パドル攪拌式めっき装置を用い、パドル攪拌式めっき装置のめっき槽に実施例5~15及び比較例1~3の電解銅めっき液をそれぞれ充填した。それぞれの電解銅めっき液中に、被めっき基体を浸漬した。被めっき基体には、銅シード層付きSi基板上に、フォトレジストを用いて、レジストパターン(形状:断面円形状の開口部を有する、開口径:200μm)を形成したものを用いた。次いで、下記めっき条件で各々電解銅めっき方法により、レジスト開口部に銅を埋め込み、被めっき基体上に銅層を形成した。
(めっき条件)
(1)ホール径:200μm
(2)電流密度:20A/dm2又は25A/dm2
(3)液温:45℃
(4)めっき時間:銅層の最小高さ(LMin)が200μmになるまでの時間
図1に示すように、評価例1~22及び比較評価例1~6によって、被めっき基体2の表面に形成された銅層1の断面をレーザ顕微鏡(キーエンス社製、型番:VK-9700)で観察することで、銅層1の最小高さ(LMin)及び最大高さ(LMax)を測定し、以下の式によりΔLを算出した。また、銅層1の側壁において深さ10μm以上の凹みが観察された場合、この凹みを欠陥とし、欠陥の深さを測定した。評価結果を表3に示す。
ΔL=LMax-LMin
Claims (11)
- 電解銅めっき液用添加剤である請求項1に記載の電解めっき液用添加剤。
- 請求項1又は2に記載の電解めっき液用添加剤を含有する電解めっき液。
- メタノール、エタノール、n-プロパノール、及びイソプロパノールから選択される少なくとも1種のアルコール化合物を含有する請求項3に記載の電解めっき液。
- 前記一般式(1)で表される化合物1gに対して、1g~100gの前記アルコール化合物を含有する請求項4に記載の電解めっき液。
- 金属塩と、電解質とを含有する請求項3~5のいずれか一項に記載の電解めっき液。
- 前記金属塩が硫酸銅であり、前記電解質が硫酸である請求項6に記載の電解めっき液。
- 塩化物イオン源を含有する請求項3~7のいずれか一項に記載の電解めっき液。
- 前記塩化物イオン源が塩化水素である請求項8に記載の電解めっき液。
- 請求項3~9のいずれか一項に記載の電解めっき液を用いる電解めっき方法。
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JP2018100260A (ja) * | 2016-12-21 | 2018-06-28 | 株式会社日本触媒 | 疎水変性デンドリマーを含む抗菌剤 |
WO2019044651A1 (ja) * | 2017-08-31 | 2019-03-07 | 株式会社Adeka | 電解めっき液用添加剤、該電解めっき液用添加剤を含有する電解めっき液及び該電解めっき液を用いた電解めっき方法 |
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JP2018100260A (ja) * | 2016-12-21 | 2018-06-28 | 株式会社日本触媒 | 疎水変性デンドリマーを含む抗菌剤 |
WO2019044651A1 (ja) * | 2017-08-31 | 2019-03-07 | 株式会社Adeka | 電解めっき液用添加剤、該電解めっき液用添加剤を含有する電解めっき液及び該電解めっき液を用いた電解めっき方法 |
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