Nitrogen containing polymers as levelers

Patent metadata

Field	Value
Publication number	US-2016237579-A1
Application number	US-201315021075-A
Country	US
Kind code	A1
Filing date	Nov 6, 2013
Priority date	Nov 6, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

Polymers of reaction products of polyamines and nitrogen containing cyclic compounds are included in metal electroplating compositions to provide level metal deposits on substrates.

First claim

What is claimed is:

1 . A polymer comprising a reaction product comprising one or more polyamines and one or more nitrogen containing compounds having formula:

wherein A is a substituted or unsubstituted 5-6 membered aromatic heterocyclic ring, a substituted or unsubstituted 5-6 membered aromatic carbocyclic ring or a substituted or unsubstituted fused heterocyclic ring system of a five membered heterocyclic ring to a six membered carbocyclic or heterocyclic ring, R is a covalent bond, linear or branched (C 1 -C 12 )alkyl, —NH—, —R 2 NH— or —R 2 NHR 3 — joining the carbon atom or heteroatom of ring A or an atom of a substituent group on ring A to the —C(O)—O—R 1 , n is an integer of 2 or greater, R 2 and R 3 are the same or different and are linear or branched (C 1 -C 12 )alkyl, and with the proviso that there is at least one nitrogen atom in either ring A, a substituent group on ring A or in R, and R 1 is hydrogen or linear or branched (C 1 -C 12 )alkyl, optionally the nitrogen compounds have a net positive charge.

2 . A metal electroplating composition comprises: one or more sources of metal ions, an electrolyte, and one or more polymers, the polymers comprise a reaction product of one or more polyamines and one or more nitrogen containing compounds having formula:

wherein A is a substituted or unsubstituted 5-6 membered aromatic heterocyclic ring, a substituted or unsubstituted 5-6 membered aromatic carbocyclic ring or a substituted or unsubstituted fused heterocyclic ring system of a five membered heterocyclic ring to a six membered carbocyclic or heterocyclic ring, R is a covalent bond, linear or branched (C 1 -C 12 )alkyl, —NH—, —R 2 NH— or —R 2 NHR 3 — joining the carbon atom or heteroatom of ring A or an atom of a substituent group on ring A to the —C(O)—O—R 1 , n is an integer of 2 or greater, R 2 and R 3 are the same or different and are linear or branched (C 1 -C 12 )alkyl, and with the proviso that their is at least one nitrogen atom in ring A, a substituent group on ring A or in R, and R 1 is hydrogen or linear or branched (C 1 -C 12 )alkyl, optionally the nitrogen compounds have a net positive charge.

3 . The metal electroplating composition of claim 2 , wherein the one or more polymers are included in the composition in amounts from 0.01 ppm to 5,000 ppm.

4 . The metal electroplating composition of claim 2 , wherein the one or more sources of metal ions are chosen from copper and tin salts.

5 . The metal electroplating bath of claim 2 , further comprising one or more accelerators and suppressors.

6 . A method comprising:
a) contacting a substrate to be plated with a metal electroplating composition comprising:
one or more sources of metal ions, an electrolyte, and one or more polymers, the one or more polymers comprise a reaction product of one or more polyamines and one or more nitrogen containing compounds having formula:

wherein A is a substituted or unsubstituted 5-6 membered aromatic heterocyclic ring, a substituted or unsubstituted 5-6 membered aromatic carbocyclic ring or a substituted or unsubstituted fused heterocyclic ring system of a five membered heterocyclic ring to a six membered carbocyclic or heterocyclic ring, R is a covalent bond, linear or branched (C 1 -C 12 )alkyl, —NH—, —R 2 NH— or —R 2 NHR 3 — joining the carbon atom or heteroatom of ring A or an atom of a substituent group on ring A to the —C(O)—O—R 1 , n is an integer of 2 or greater, R 2 and R 3 are the same or different and are linear or branched (C 1 -C 12 )alkyl, and with the proviso that their is at least one nitrogen atom in ring A, a substituent group or ring A or in R, and R 1 is hydrogen or linear or branched (C 1 -C 12 )alkyl, optionally the nitrogen compounds have a net positive charge;

b) applying a current; and
c) depositing a metal on the substrate.

7 . The method of claim 6 , wherein the one or more sources or metal ions are chosen from copper salts and tin salts.

8 . The method of claim 6 wherein the substrate is a printed circuit board.

Assignees

• Rohm & Haas Elect Mat
• Dow Global Technologies Llc

Inventors

• Duan Lingli
• Niazimbetova Zuhra I
• Chen Chen
• Sun Tong
• Rzeznik Maria

Classifications

• H05K3/10

  in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern · CPC title

• C25D3/38

  of copper · CPC title

• C08G73/0616 Primary

  with only two nitrogen atoms in the ring · CPC title

• C25D3/32 Primary

  characterised by the organic bath constituents used · CPC title

• C25D7/00

  Electroplating characterised by the article coated · CPC title