CONDUCTIVE SHEET AND MANUFACTURING METHOD THEREOF

• US 20080292826A1
• Filed: 04/10/2008
• Published: 11/27/2008
• Est. Priority Date: 05/25/2007
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: TANABE, Koji, Matsumoto, Kenichi
• Application Number:
  US12/100,641
• Publication Number:
  US 20080292826A1
• Time in Patent Office: Days
• US Class Current: 428/48
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: H05K 2203/1105 Heating or thermal processing not related to soldering, firing, curing or laminating, e.g. for shaping the substrate or during finish plating
• CPC Class Codes: H05K 2203/1142 Conversion of conductive material into insulating material or into dissolvable compound
• CPC Class Codes: H05K 2203/1163 Chemical reaction, e.g. heating solder by exothermic reaction
• CPC Class Codes: H05K 3/02 in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
• CPC Class Codes: Y10T 428/164 Continuous two dimensionally sectional layer

Abstract

A conductive sheet includes a film-like substrate, conductive patterns, and an insulator. The conductive patterns provided on the substrate are made of a synthetic resin dispersed with silver therein. The insulator made of a synthetic resin dispersed with silver chloride therein is provided on the substrate so as to separate the conductive patterns from each other. Followings are the manufacturing method of the conductive sheet. First, a conductive layer including the synthetic resin dispersed with silver therein is formed on the substrate. Next, a solution including a chloride capable of reacting with silver is coated on a predetermined portion of the conductive layer. Finally, the solution coated on the position on the conductive layer is heated to change silver into silver chloride chemically, thereby forming the insulator so as to form the conductive patterns.

Claims

1. A conductive sheet, comprising:

a film-like substrate;

conductive patterns made of a synthetic resin dispersed with silver therein, the conductive patterns being provided on the substrate; and

an insulator made of a synthetic resin dispersed with silver chloride therein, the insulator being provided on the substrate so as to separate the conductive patterns from each other.

2. The conductive sheet according to claim 1, wherein the silver is needle-like in shape.

3. A manufacturing method of a conductive sheet, comprising:

forming a conductive layer including a synthetic resin dispersed with silver therein on a film-like substrate;

coating a solution including a chloride capable of reacting with the silver;

and

forming conductive patterns by forming an insulator by changing the silver in a position coated with the solution on the conductive layer into silver chloride chemically by heating for drying.

4. The manufacturing method of the conductive sheet according to claim 3, wherein the chloride includes at least one of ammonium chloride, ferric chloride and cupric chloride.

5. The manufacturing method of the conductive sheet according to claim 3, wherein the solution includes a thickener.