| US 7,361,262 B2 | ||
| Acid plating bath and method for the electrolytic deposition of satin nickel deposits | ||
| Wolfgang Dahms, Berlin (Germany); Klaus-Dieter Schulz, Berlin (Germany); and Thomas Moritz, Berlin (Germany) | ||
| Assigned to Atotech Deutschland GmbH, Berlin (Germany) | ||
| Appl. No. 10/515,412 PCT Filed May 15, 2003, PCT No. PCT/EP03/05134 § 371(c)(1), (2), (4) Date Dec. 22, 2004, PCT Pub. No. WO03/100137, PCT Pub. Date Dec. 04, 2003. |
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| Claims priority of application No. 102 22 962 (DE), filed on May 23, 2002. | ||
| Prior Publication US 2005/0150774 A1, Jul. 14, 2005 | ||
| Int. Cl. C25D 3/12 (2006.01); C23C 18/00 (2006.01) | ||
| U.S. Cl. 205—276 [205/271; 106/1.27] | 14 Claims |
1. An acid plating bath for the electrolytic deposition of satin nickel deposits containing a nickel electrolyte, at least
one quaternary ammonium compound and at least one polyether, the at least one polyether having at least one strongly hydrophobic
side chain, wherein the at least one polyether has the following general chemical formula (I):
 R1 and R1′ are independently hydrogen or methyl and can be selected independently in each [(CH2CHR1O)]a—CHR1′—CH3 unit;
R3 is hydrogen or a linear chain or branched chain C1- to C18-alkyl;
a is an integer from 0 to 500;
Z is a grouping selected from the group consisting of a single bond, CH2, O, NR4, SO2, S, NR4SO2, COO, CO and NR4CO, wherein R4 is hydrogen or a linear chain or branched chain C1- to C-18-alkyl group;
R2 is a moiety selected from the group consisting of
 wherein the chains of the groups having the formulae (II) and (III) can be either linear or branched;
X is a single bond or O:
n and m are integers from 0 to 12, wherein n+m is at least 1;
o is either 0 or 1;
R5, R6, R7, R8, R9, R10 and R11 are selected independently and are each a moiety selected from the group consisting of hydrogen, a linear chain or branched
chain C1- to C18-alkyl and substituted or unsubstituted phenyl; and
instead of a hydrogen atom the hydrophobic side chain —Z—R2 is bound to a carbon atom of the unit —CH2—CHR1—O— or to a carbon atom of the end group —CHR1′—CH3.
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