DE1165962B - Acid baths for the production of leveling copper coatings - Google Patents

Acid baths for the production of leveling copper coatings

Info

Publication number
DE1165962B
DE1165962B DER21343A DER0021343A DE1165962B DE 1165962 B DE1165962 B DE 1165962B DE R21343 A DER21343 A DE R21343A DE R0021343 A DER0021343 A DE R0021343A DE 1165962 B DE1165962 B DE 1165962B
Authority
DE
Germany
Prior art keywords
thiourea
leveling
production
formaldehyde
copper coatings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DER21343A
Other languages
German (de)
Inventor
Dipl-Chem Gregor Michael
Dipl-Chem Dr Emil Roth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Riedel and Co
Original Assignee
Riedel and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DER20796A external-priority patent/DE1152863B/en
Application filed by Riedel and Co filed Critical Riedel and Co
Priority to DER21343A priority Critical patent/DE1165962B/en
Publication of DE1165962B publication Critical patent/DE1165962B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/38Electroplating: Baths therefor from solutions of copper

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Description

BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY

DEUTSCHESGERMAN

PATENTAMTPATENT OFFICE

AUSLEGESCHRIFTEDITORIAL

Internat. KL: C 23 bBoarding school KL: C 23 b

Nummer: Aktenzeichen: Anmeldetag: Auslegetag:Number: File number: Registration date: Display day:

Deutsche Kl.: 48 a-5/20German class: 48 a-5/20

R 21343 VIb/48 a
14. Juni 1957
19. März 1964
R 21343 VIb / 48 a
June 14, 1957
March 19, 1964

Gegenstand der Hauptpatentanmeldung sind saure Bäder zur Herstellung von einebnenden Kupferüberzügen unter Verwendung von Vorkondensaten von Thioharnstoff mit Formaldehyd zusammen mit Grundglänzern.The main patent application relates to acidic baths for the production of leveling copper coatings using precondensates of thiourea with formaldehyde together with Basic gloss.

Es wurde gefunden, daß die Eigenschaften solcher sauren Bäder weitgehend verbessert werden können, wenn zur Vorkondensation zusammen mit Thioharnstoff ein anderer, mindestens zwei NH2-Gruppen enthaltender Stoff verwendet wird. Solche Verbindungen müssen ebenso wie Thioharnstoff mindestens zwei H2N-Gruppen aufweisen, um »eine Brücke« zwischen zwei Formaldehydmolekülen zu bilden.It has been found that the properties of such acidic baths can be largely improved if another substance containing at least two NH 2 groups is used for the precondensation together with thiourea. Like thiourea, such compounds must have at least two H 2 N groups in order to form “a bridge” between two formaldehyde molecules.

So entstehen Ketten bzw. zwei- oder dreidimensional vernetzte Gebilde, die im einfachen Fall etwa folgende Struktur annehmen können:This creates chains or two- or three-dimensional networked structures, which in the simple case are roughly the following Structure can assume:

V-CH2-NH-C-NH-CH2-NH-R-NH-CH2-Zn wo — R — einen Benzol-, Naphthalin-, Diphenyl-, Anthracen-, Phenanthren-, Pyren-, Triazin- oder einen anderen heteroxyklischen aliphatischen oder einen cycloaliphatischen Rest bedeutet. Die Kondensation tritt bei etwa 110 bis 1300C ein. Das Molverhältnis zwischen Thioharnstoff und der mindestens zwei H2N-Gruppen enthaltenden Verbindung, z. B. Melamin, liegt optimal bei 1:1; doch können auch andere Verhältnisse gewählt werden, z.B. 1:2. Damit wird die aggressive Wirkung des Thioharnstoffes abgeschwächt und seine Inhibition für den beschriebenen Zweck günstig abgestimmt.V-CH 2 -NH-C-NH-CH 2 -NH-R-NH-CH 2 -Zn where - R - a benzene, naphthalene, diphenyl, anthracene, phenanthrene, pyrene, triazine or means another heteroxyclic aliphatic or a cycloaliphatic radical. The condensation occurs at about 110 to 130 0 C. The molar ratio between thiourea and the compound containing at least two H 2 N groups, e.g. B. melamine, is optimally 1: 1; however, other ratios can also be chosen, for example 1: 2. This weakens the aggressive effect of the thiourea and its inhibition is favorably matched for the purpose described.

Statt Melamin können auch andere, mindestens zwei H2N-Gruppen enthaltende Substanzen gewählt werden, z. B. Diamino-azobenzol, Diamino-diphenylamin, Diamino-diphenylharnstoff, Diamino-stilben, Harnstoff, o-Dianisidin, o-Tolidin, Phenylendiamine, 2,4'-Diamino-diphenyl, Parafuchsin, Kongorot, Benzidin, Guanidin, Benzidin-2,2'-disulfonsäure, Diaminostilben-disulfonsäure, l,5-Naphthylendiamin-3,7-disulfonsäure, Naphthylendiamine.Instead of melamine, other substances containing at least two H 2 N groups can also be selected, e.g. B. diamino-azobenzene, diamino-diphenylamine, diamino-diphenylurea, diamino-stilbene, urea, o-dianisidine, o-tolidine, phenylenediamines, 2,4'-diamino-diphenyl, parafuchsin, congo red, benzidine, guanidine, benzidine-2 , 2'-disulfonic acid, diaminostilbene disulfonic acid, l, 5-naphthylenediamine-3,7-disulfonic acid, naphthylenediamines.

In Mischkondensationsprodukten, z. B. im Thioharnstoff-Formaldehyd-Naphthylendiamin-Kondensat, ist die »Aktivität« des Thioharnstoffes durch die Anwesenheit von wenig aktiven Gruppen weitgehend abgeschwächt. Außerdem entstehen beim teilweisen Ersatz der Thioharnstoffmoleküle durch Naphthylendiaminmoleküle größere Kondensationsmoleküle, die sich für die Einebnung.und deren Konstanz auch bei höheren Temperaturen besonders eignen.In mixed condensation products, e.g. B. in thiourea-formaldehyde-naphthylenediamine condensate, the "activity" of the thiourea is largely due to the presence of less active groups weakened. In addition, when the thiourea molecules are partially replaced by naphthylenediamine molecules larger condensation molecules, which are responsible for leveling. and their constancy also for particularly suitable for higher temperatures.

Neben einer Steigerung der Einebnung durch diese Kondensationsprodukte wird außerdem eine AusSaure Bäder zur Herstellung von einebnenden
Kupferüberzügen
In addition to an increase in leveling through these condensation products, an acid bath is also used for the production of leveling
Copper plating

Zusatz zur Anmeldung: R 20796 VI b / 48 a —
Auslegeschrift 1152 863 -
Addition to registration: R 20796 VI b / 48 a -
Interpretation document 1152 863 -

Anmelder:Applicant:

Riedel & Co., Bielefeld, Wiesenstr. 23Riedel & Co., Bielefeld, Wiesenstr. 23

Als Erfinder benannt:
Dipl.-Chem. Gregor Michael, Bielefeld,
Dipl.-Chem. Dr. Emil Roth,
Brackwede bei Bielefeld
Named as inventor:
Dipl.-Chem. Gregor Michael, Bielefeld,
Dipl.-Chem. Dr. Emil Roth,
Brackwede near Bielefeld

breitung der Einebnung auch im Bereich niedriger Stromdichten, eine bessere Toleranz gegenüber den Konzentrationsveränderungen des Einebners im Bade und eine Erhöhung der Temperaturgrenzen für die Einebnung und den Glanz erzielt.Broadening of the leveling also in the range of low current densities, a better tolerance towards the Changes in the concentration of the leveler in the bath and an increase in the temperature limits for the Leveling and shine achieved.

Es ist bekannt, daß das Kupfer, insbesondere bei hohen Temperaturen, sich sehr schlecht inhibieren läßt. Nach der Erfindung kann die Inhibition durch entsprechend große Inhibitormoleküle mit bestimmtem Kondensationsgrad unter Beibehaltung seiner »aktiven« Eigenschaften, bedingt durch = N —-C = S-Gruppen, verstärkt werden. Die so aufgebauten sauren Kupferbäder liefern noch bei 35 bis 400C glänzende, ausgezeichnete einebnende Kupferüberzüge, dagegen arbeiten die gleichen Bäder auf Formaldehyd-Thioharnstoff-Basis nur bis 25 0C.It is known that copper is very difficult to inhibit, especially at high temperatures. According to the invention, the inhibition can be increased by means of correspondingly large inhibitor molecules with a certain degree of condensation while retaining its "active" properties, due to = N - C = S groups. The acidic copper baths built up in this way deliver brilliant, excellent leveling copper coatings even at 35 to 40 ° C., whereas the same baths based on formaldehyde-thiourea only work up to 25 ° C.

BeispieleExamples

1. In dem Bad folgender Zusammensetzung:
210 g/l CuSO4 · 4 H2O,
1. In the bath of the following composition:
210 g / l CuSO 4 4 H 2 O,

60 g/l konzentrierte H2SO4,
5 g/l Alkylpolyglykolnetzer,
0,1 g/l Diäthyldithiocarbaminbuttersäure,
0,1 g/l HCl,
60 g / l concentrated H 2 SO 4 ,
5 g / l alkyl polyglycol wetting agent,
0.1 g / l diethyldithiocarbamic butyric acid,
0.1 g / l HCl,

0,03 g/l Thioharnstoff- Formaldehyd -Diaminodiphenylharnstoff-Kondensat, 0.03 g / l thiourea formaldehyde diaminodiphenylurea condensate,

erhält man bei Stromdichten von 1 bis 6 A/dm2 und 15 bis 35°C auf 26 μ starken Kupferschichten Glanz und eine gute Einebnung, die die Schleifriefen des O-Schliffes vollkommen zum Verschwinden bringt.At current densities of 1 to 6 A / dm 2 and 15 to 35 ° C on 26 μ thick copper layers, gloss and good leveling are obtained, which completely make the grinding grooves of the O-cut disappear.

2. Das Bad folgender Zusammensetzung:2. The bath of the following composition:

• 409 539/436• 409 539/436

Claims (1)

3 43 4 g/1 CuSO4 · 5 H2O, Patentanspruch:g / 1 CuSO 4 5 H 2 O, claim: 90 g/l konzentrierte H2SO4, Saure Bäder zur Herstellung von einebnenden90 g / l concentrated H 2 SO 4 , acidic baths for the production of leveling 8 g/l Alkylpolyglykolnetzer, Kupferüberzügen unter Verwendung von Grund-8 g / l alkyl polyglycol wetting agent, copper coatings using basic 0,4 g/l Pyrazin-3,5-Dithioglykolsäure, glänzern und einem Vorkondensationsprodukt aus0.4 g / l pyrazine-3,5-dithioglycolic acid, shine and a precondensation product 0,04 g/l Thioharnstoff-Formaldehyd-Diamino- 5 Thioharnstoff und Formaldehyd nach Patent-0.04 g / l thiourea-formaldehyde-diamino- 5 thiourea and formaldehyde according to patent diphenylamin-Kondensat, anmeldung R 20796 VI/48a, dadurch^ gekennzeichnet, daß sie ein Vorkonden-diphenylamine condensate, registration R 20796 VI / 48a, characterized ^, that they have a pre-condensing zeigt bei Stromdichten von 1 bis 6 A/dm2 im Tempe- sationsprodukt aus Thioharnstoff, Formaldehydshows formaldehyde at current densities of 1 to 6 A / dm 2 in the temperature product of thiourea raturintervall 15 bis 40° C glänzende, gut einebnende und einer Verbindung mit mindestens zwei NH2-temperature interval 15 to 40 ° C shiny, well leveling and a compound with at least two NH 2 - Kupferüberzüge. io Gruppen enthalten.Copper coatings. io groups included. 409 539/436 3.64 ® Bundesdruckerei Berlin409 539/436 3.64 ® Bundesdruckerei Berlin
DER21343A 1957-03-16 1957-06-14 Acid baths for the production of leveling copper coatings Pending DE1165962B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER21343A DE1165962B (en) 1957-03-16 1957-06-14 Acid baths for the production of leveling copper coatings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DER20796A DE1152863B (en) 1957-03-16 1957-03-16 Acid baths for the production of leveling copper coatings
DER21343A DE1165962B (en) 1957-03-16 1957-06-14 Acid baths for the production of leveling copper coatings

Publications (1)

Publication Number Publication Date
DE1165962B true DE1165962B (en) 1964-03-19

Family

ID=25991179

Family Applications (1)

Application Number Title Priority Date Filing Date
DER21343A Pending DE1165962B (en) 1957-03-16 1957-06-14 Acid baths for the production of leveling copper coatings

Country Status (1)

Country Link
DE (1) DE1165962B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278164B (en) * 1965-07-30 1968-09-19 Unilever Nv Device for stripping and heading the cabbage roses from a Brussels sprout plant in a single operation
WO2006094755A1 (en) 2005-03-11 2006-09-14 Atotech Deutschland Gmbh Polyvinylammonium compound, method of manufacturing same, acidic solution containing said compound and method of electrolytically depositing a copper deposit
US7872130B2 (en) 2002-12-20 2011-01-18 Atotech Deutschland Gmbh Mixture of oligomeric phenazinium compounds and acid bath for electrolytically depositing a copper deposit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278164B (en) * 1965-07-30 1968-09-19 Unilever Nv Device for stripping and heading the cabbage roses from a Brussels sprout plant in a single operation
US7872130B2 (en) 2002-12-20 2011-01-18 Atotech Deutschland Gmbh Mixture of oligomeric phenazinium compounds and acid bath for electrolytically depositing a copper deposit
WO2006094755A1 (en) 2005-03-11 2006-09-14 Atotech Deutschland Gmbh Polyvinylammonium compound, method of manufacturing same, acidic solution containing said compound and method of electrolytically depositing a copper deposit
US8114263B2 (en) 2005-03-11 2012-02-14 Atotech Deutschland Gmbh Polyvinylammonium compound, method of manufacturing same, acidic solution containing said compound and method of electrolytically depositing a copper deposit

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