Galvanic process for making printed conductive metal markings for chipless rfid applications

Patent metadata

Field	Value
Publication number	US-2016353579-A1
Application number	US-201615232710-A
Country	US
Kind code	A1
Filing date	Aug 9, 2016
Priority date	Nov 21, 2007
Publication date	Dec 1, 2016
Grant date	—

Abstract

A process for printing a metal wire pattern on a substrate, including: printing a first salt solution including a metal ion that will undergo a reduction half-reaction; printing a second salt solution containing an oxidizing agent that will undergo an oxidation half-reaction in contact with the first salt solution, resulting in the reduction of the metal ions of the first salt solution; and allowing the first and second salt solutions to react by a galvanic reaction, causing reduced metal ions of the first salt solution to precipitate as a solid, on the substrate.

First claim

What is claimed is:

1 . A system for printing a metal wire pattern on a substrate, comprising:
an inkjet printer for printing on the substrate; a first ink supply reservoir containing a first salt solution comprising a metal ion that will undergo a reduction half-reaction; and a second ink supply reservoir containing a second salt solution comprising an oxidizing agent that will undergo an oxidation half-reaction; wherein the first salt solution and second salt solution are printed in contact with one another, and allowed to react by a galvanic reaction; and the reduced metal ions of the first salt solution precipitate as a solid on the substrate and form a metal wire.

2 . The system according to claim 1 , wherein the first salt solution contains copper (II), and the second salt solution contains chromium (III).

Assignees

• Xerox Corp

Inventors

• Chopra Naveen
• Kazmaier Peter M
• Lalisse Dominique J
• Smith Paul F

Classifications

• H05K2203/013

  Inkjet printing, e.g. for printing insulating material or resist · CPC title

• H05K3/12

  using {thick film techniques, e.g.} printing techniques to apply the conductive material {or similar techniques for applying conductive paste or ink patterns} · CPC title

• B05C5/02

  {the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g.} from an outlet device in contact or almost in contact, with the work · CPC title

• H05K3/182

  characterised by the patterning method · CPC title

• H05K2203/1157

  Using means for chemical reduction · CPC title