Device equipped with planar heater

• US 20080237219A1
• Filed: 03/17/2008
• Published: 10/02/2008
• Est. Priority Date: 03/29/2007
• Status: Active Grant

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Takeuchi, Kesatoshi
• Granted Patent: US 8,263,913 B2
• Time in Patent Office: Days
• US Class Current: 219/522
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 3/84 Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields

Abstract

The planar heater includes an insulating substrate, an electric conductive film disposed on the substrate, a plurality of electrodes both attached to one side of the electric conductive film, and an insulating film covering the electric conductive film. The electric conductive film is preferably formed of material having a resistance temperature coefficient of 420 ppm/° C. or higher at normal temperature.

Claims

1. A device comprising a planar heater, the planar heater including:

an insulating substrate;

an electric conductive film disposed on the substrate;

a plurality of electrodes both attached to one side of the electric conductive film; and

an insulating film covering the electric conductive film,

wherein the electric conductive film is formed of material having a resistance temperature coefficient of 420 ppm/°

C. or higher at normal temperature.

2. The device of claim 1, wherein the electric conductive film is formed of material having resistance of 4.8 μ

Ω

-cm or higher at normal temperature.

3. The device of claim 2, wherein the electric conductive film is formed of tungsten.

4. The device according to claim 1, wherein the planar heater is transparent.