Method of preparing electrical circuit

• US 20040173781A1
• Filed: 03/22/2004
• Published: 09/09/2004
• Est. Priority Date: 02/14/2002
• Status: Abandoned Application

• Current Assignee: Conalisa M. Murphy, Daniel P. Lawrence
• Original Assignee: Conalisa M. Murphy, Daniel P. Lawrence
• Inventors: Lawrence, Daniel P., Murphy, Conalisa M.
• Application Number:
  US10/805,986
• Publication Number:
  US 20040173781A1
• Time in Patent Office: Days
• US Class Current: 252/500
• CPC Class Codes: C09D 11/52 Electrically conductive inks
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/0775 arrangements for connecting the integrated circuit to the antenna
• CPC Class Codes: H05K 1/095 for polymer thick films, i.e. having a permanent organic polymeric binder
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24917 including metal layer

Abstract

A conductive ink composition comprising a carboxylic acid- or anhydride-functional aromatic vinyl polymer, a conductive particulate material, and/or a conductive flake material (any material with an aspect ratio of at least about 5:1) may be printed in a thickness of five microns or less to provide sufficient conductivity for RFID tag antenna and other printed conductive and semi-conductive structures. Printing the ink by flexographic or gravure printing offers advantages over other printing methods previously used.

Claims

1. A method of preparing an electrical circuit, comprising a step of printing a conductive ink comprising a carboxylic acid- or anhydride-functional aromatic vinyl polymer and a conductive material selected from the group consisting of conductive particulate materials, conductive flake materials, and combinations thereof to produce a conductive element of said circuit,

wherein said printing is carried out by a gravure printing or flexographic printing.

2. A method of preparing an electrical component, comprising a step of providing a part of said component by gravure printing or flexographic printing of a conductive ink comprising a carboxylic acid- or anhydride-functional aromatic vinyl polymer and a conductive material selected from the group consisting of conductive particulate materials, conductive flake materials, and combinations thereof.

3. A method according to claim 2, wherein the electrical component is a member selected from the group consisting of resistors, capacitors, inductors, batteries, antennae, and circuitry.