Thin-layer metal film

• US 20050019502A1
• Filed: 05/26/2004
• Published: 01/27/2005
• Est. Priority Date: 01/25/2002
• Status: Abandoned Application

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Kawamura, Koichi, Kano, Takeyoshi
• Application Number:
  US10/853,215
• Publication Number:
  US 20050019502A1
• Time in Patent Office: Days
• US Class Current: 427/532
• CPC Class Codes: C08F 8/42 Introducing metal atoms or metal-containing groups
• CPC Class Codes: C23C 18/1658 with two steps starting with metal deposition followed by addition of reducing agent
• CPC Class Codes: C23C 18/2086 with use of organic or inorganic compounds other than metals, first
• CPC Class Codes: C23C 18/36 using hypophosphites
• CPC Class Codes: C23C 18/44 using reducing agents
• CPC Class Codes: G11B 5/858 Producing a magnetic layer by electro-plating or electroless plating

Abstract

A thin-layer metal film that is high in productivity, can be prepared in a simple step, has a high density, and is superior in durability. The thin-layer metal film is obtained by reducing a metal salt on a surface of a substrate where a metal salt-containing hydrophilic graft polymer chain is present. The thin-layer metal film is obtained by reducing a metal ion adsorbed on a hydrophilic functional group of the hydrophilic graft polymer chain with a reducing agent to deposit a metal.

Claims

1. A process for forming a metal film, comprising the steps of:

coating a photo-polymerizable composition on a surface of a substrate;

bringing an aqueous radical-polymerizable compound into contact with the photo-polymerizable composition to form a hydrophilic graft polymer chain on the surface of the substrate by irradiation with light;

introducing a metal salt to the hydrophilic graft polymer chain; and

reducing the metal salt.

7. The process for forming a metal film according to any one of claims 1 to 3, wherein the metal salt-containing hydrophilic graft polymer chain is one in which a metal ion is adsorbed on an acid group-containing graft polymer.

8. The process for forming a metal film according to any one of claims 1 to 3, wherein the metal salt-containing hydrophilic graft polymer chain is one in which a metal salt is impregnated in a graft polymer having strong affinity with metal salts.

9. The process for forming a metal film according to any one of claims 1 to 3, wherein the metal salt-containing hydrophilic graft polymer chain is obtained by dipping the substrate, on which a hydrophilic graft polymer is present, in a metal salt solution to thereby adsorb the metal salt solution on the graft polymer.

10. The process for forming a metal film according to any one of claims 1 to 3, wherein end terminals of the graft polymer chain are bound to the surface of the substrate or to a layer comprising the photo-polymerizable composition coated on the surface of the substrate, and a functional graft moiety that exhibits specific physical properties is not substantially crosslinked.

11. The process for forming a metal film according to any one of claims 1 to 3, wherein the hydrophilic graft polymer chain has a weight-average molecular weight in a range from 500 to 5,000,000.

16. The process for forming a metal film according to claim 7, wherein the acid group-containing graft polymer is selected from the group consisting of polyacrylic acid, polymethacrylic acid, polystyrenesulfonic acid, poly-2-acrylamide-2-methyl-propanesulfonic acid, salts of these acids, polyacrylamide, and polyvinylacetamide.

17. The process for forming a metal film according to any one of claims 1-3, wherein the metal salt is a salt of a metal selected from the group consisting of Ag, Cu, Al, and Ni.

18. The process for forming a metal film according to any one of claims 1-3, wherein the metal salt is a salt of a metal selected from the group consisting of Pd, a Pd-Ag alloy, a Pd—

Y alloy, a Pd—

Gd alloy, a Pd—

Ag—

Y alloy, and a Pd—

Au alloy.

19. The process for forming a metal film according to any one of claims 1-3, wherein the reduction is carried out with a solution selected from the group consisting of a hypophosphite solution, a tetrahydroborate solution, a hydrazine solution, and a formalin solution.

2. A process for forming a metal film, comprising the steps of:

reacting a polymer having a functional group reactive with a substrate in end terminals or side chains thereof with a functional group on a surface of the substrate to form a hydrophilic graft polymer chain on the surface of the substrate;

introducing a metal salt to the hydrophilic graft polymer chain; and

reducing the metal salt.

3. A process for forming a metal film, comprising the steps of:

treating a surface of a substrate with plasma or electron beams to generate radicals;

reacting the activated surface with a hydrophilic functional group-containing monomer to form a hydrophilic graft polymer chain on the surface of the substrate;

introducing a metal salt to the hydrophilic graft polymer chain; and

reducing the metal salt.

4. A process for forming a metal film, comprising the steps of:

coating a photo-polymerizable composition on a surface of a substrate;

bringing an aqueous radical-polymerizable compound into contact with the photo-polymerizable composition to form a functional graft polymer chain on the surface of the substrate by irradiation with light;

introducing a metal salt to the functional graft polymer chain; and

reducing the metal salt.

12. The process for forming a metal film according to any one of claims 4-6, wherein an end terminal of the functional graft polymer chain is bound to the surface of the substrate or to a surface layer of the substrate, and a functional graft moiety that exhibits specific physical properties is not substantially crosslinked.

13. The process for forming a metal film according to any one of claims 4-6, wherein the functional graft polymer chain has a weight-average molecular weight in a range from 500 to 5,000,000.

14. The process for forming a metal film according to claims 4-6, wherein the functional graft polymer chain is bound to the surface of the substrate or to a layer comprising the photo-polymerizable composition coated on the surface of the substrate.

15. The process for forming a metal film according to any one of claims 4-6, wherein the functional graft polymer chain is introduced into a polymer crosslinked film structure.

5. A process for forming a metal film, comprising the steps of:

reacting a polymer having a functional group reactive with a substrate in end terminals or side chains thereof with a functional group on a surface of the substrate to form a functional graft polymer chain on the surface of the substrate;

introducing a metal salt to the functional graft polymer chain; and

reducing the metal salt.

6. A process for forming a metal film, comprising the steps of:

treating a surface of a substrate with plasma or electron beams to generate radicals;

reacting the activated surface with a functional group-containing monomer to form a functional graft polymer chain on the surface of the substrate;

introducing a metal salt to the functional graft polymer chain; and

reducing the metal salt.