Electrically-conductive liquid for directly printing an electrical circuit component onto a substrate, and a method for making such a liquid

• US 5,622,652 A
• Filed: 06/07/1995
• Issued: 04/22/1997
• Est. Priority Date: 06/07/1995
• Status: Expired due to Term

• Current Assignee: Morgan Adhesives Company (Amcor Plc)
• Original Assignee: IMG Group Limited
• Inventors: Kucherovsky, Joseph, Isen, Irvin
• Primary Examiner(s): Lieberman, Paul
• Assistant Examiner(s): KOPEC, MARK T
• Application Number:
  US08/481,992
• Time in Patent Office: 685 Days
• Field of Search: 252/511, 252/512, 252/514, 252/518, 106/1.18, 106/1.19, 106/1.26
• US Class Current: 252/511
• CPC Class Codes: A61J 1/035 Blister-type containers blisters in general B65D75/36
• CPC Class Codes: A61J 7/0481 working on a schedule basis
• CPC Class Codes: B41M 1/10 Intaglio printing ; Gravure printing
• CPC Class Codes: B41M 3/006 Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles
• CPC Class Codes: G01V 15/00 Tags attached to, or associated with, an object, in order to enable detection of the object record carriers for use with machines having a detectable tag or marker G06K19/00
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• CPC Class Codes: H05B 2203/002 Heaters using a particular layout for the resistive material or resistive elements
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 2203/036 Heaters specially adapted for garment heating
• CPC Class Codes: H05B 3/34 flexible, e.g. heating nets or webs
• CPC Class Codes: H05K 1/0393 Flexible materials H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups
• CPC Class Codes: H05K 1/16 incorporating printed electric components, e.g. printed resistor, capacitor, inductor
• CPC Class Codes: H05K 1/165 incorporating printed inductors
• CPC Class Codes: H05K 1/167 incorporating printed resistors
• CPC Class Codes: H05K 2203/0113 Female die used for patterning or transferring, e.g. temporary substrate having recessed pattern
• CPC Class Codes: H05K 2203/0143 Using a roller; Specific shape thereof; Providing locally adhesive portions thereon
• CPC Class Codes: H05K 2203/0534 Offset printing, i.e. transfer of a pattern from a carrier onto the substrate by using an intermediate member
• CPC Class Codes: H05K 2203/1545 Continuous processing, i.e. involving rolls moving a band-like or solid carrier along a continuous production path
• CPC Class Codes: H05K 3/1275 by other printing techniques, e.g. letterpress printing, intaglio printing, lithographic printing, offset printing
• CPC Class Codes: H05K 3/227 : Drying of printed circuits
• CPC Class Codes: H05K 3/4664 : Adding a circuit layer by thick film methods, e.g. printing techniques or by other techniques for making conductive patterns by using pastes, inks or powders H05K3/4647 takes precedence
• CPC Class Codes: Y10S 428/901 : Printed circuit
• CPC Class Codes: Y10T 428/24917 : including metal layer

Abstract

An electrically-conductive liquid for directly printing an electrical circuit component onto a substrate includes between substantially 25 percent and substantially 85 percent by weight of a solvent or water. Between substantially 10 percent and substantially 40 percent by weight of solids are provided, the solids including (i) substantially 5 percent to substantially 30 percent of polymer resin, and (ii) substantially 3 percent to substantially 15 percent by weight of a conductive powder. Between substantially 1 percent and substantially 7 percent by weight of plasticizers are also included. A method of making such an ink includes the steps of premixing the above-referenced solids and the above-referenced plasticizers, and then mixing the premix with the above-referenced solvent or water.

Claims

1. An electrically-conductive gravure printing liquid for directly printing an electrical circuit component onto a substrate, comprising:

between substantially 55 percent and substantially 85 percent by weight of a solvent, said solvent comprising between substantially 60 percent and substantially 95 percent by weight esters, between substantially 3 percent and substantially 20 percent by weight glycols, and between substantially 3 percent and substantially 20 percent by weight ketones;

between substantially 10 percent and substantially 40 percent by weight of solids including (i) substantially 5 percent to substantially 90 percent by weight of polymer resin, and (ii) substantially 3 percent to substantially 80 percent by weight of a conductive powder; and

between substantially 1 percent and substantially 7 percent by weight plasticizers.

2. A liquid according to claim 1, wherein said solvent comprises between substantially 65 percent and substantially 80 percent by weight of the liquid, said solvent comprising:

between substantially 60 percent and substantially 95 percent by weight of esters;

between substantially 3 percent and substantially 20 percent by weight ether glycols; and

between substantially 3 percent and substantially 20 percent by weight ketones.

3. A liquid according to claim 2, wherein said conductive powders are substantially 5 to substantially 10 microns in diameter, and are selected from the group consisting of aluminum, graphite, gold, and silver.

4. A liquid according to claim 3, wherein said polymer resin comprises a polyester.

5. A liquid according to claim 4, wherein said plasticizers comprise dioctylphatalate.

6. A liquid according to claim 1, wherein said solvent comprises substantially 72 percent by weight of the liquid, said solids comprises substantially 25 percent by weight of the liquid, and said plasticizers comprise substantially 3 percent by weight of the liquid.

7. A method of making an electrically-conductive liquid for directly printing an electrical circuit component onto a substrate, comprising the steps of:

providing a solvent fluid having substantially 80 percent esters, 10 percent by weight ether glycols, and 10 percent by weight ketones, said solvent comprising substantially 72 percent by weight of the liquid;

adding to said solvent solids comprising substantially 72 percent by weight polymeric resin and substantially 28 percent by weight conductive powder, said solids comprising substantially 25 percent by weight of the liquid; and

adding to said solvent and solids plasticizers comprising substantially 3 percent by weight of the liquid.

8. An electrically-conductive gravure printing liquid for directly printing an electrical circuit component onto a substrate, comprising:

between substantially 55 percent and substantially 85 percent by weight of a solvent, said solvent comprising between substantially 60 percent and substantially 95 percent esters, between substantially 3 percent and substantially 20 percent by weight glycols, and between substantially 3 percent and substantially 20 percent ketones;

between substantially 10 percent and substantially 40 percent by weight of solids including (i) substantially 5 percent to substantially 90 percent by weight of polymer resin, and (ii) substantially 3 percent to substantially 80 percent by weight of a conductive powder said conductive powder comprising at least one of graphite and silver; and

between substantially 1 percent and substantially 3 percent by weight plasticizers.