Polymer thick film heating element on a glass substrate
First Claim
1. An apparatus for electrically heating a substrate, said apparatus comprising:
- a substrate having a surface, said substrate being a glass material;
a first conductor adhered to said surface;
a second conductor adhered to said surface;
a resistive film adhered to said surface, said resistive film in electrical contact with said first conductor, said resistive film in electrical contact with said second conductor;
a first terminal area in electrical contact with said first conductor; and
a second terminal area in electrical contact with said second conductor.
1 Assignment
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Accused Products
Abstract
Apparatus and methods for attaching a heating element to a glass substrate. The heating element is formed of a plurality of conductive polymer thick film inks screen printed on the substrate. The heating element includes a resistive strip or resistor, conductive strips or conductors, and terminal portions, which form part of an electrical circuit. Electrical power applied to the terminal portions causes current to flow through the resistive strip, which generates heat through resistive heating. The heat is transferred to the substrate. The method of applying the heating element to the substrate includes, in one embodiment, screen printing polymer thick film materials onto a surface of a glass substrate to form the circuit conductors and resistive elements and surface mounting other components of the circuit on the substrate.
16 Citations
20 Claims
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1. An apparatus for electrically heating a substrate, said apparatus comprising:
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a substrate having a surface, said substrate being a glass material;
a first conductor adhered to said surface;
a second conductor adhered to said surface;
a resistive film adhered to said surface, said resistive film in electrical contact with said first conductor, said resistive film in electrical contact with said second conductor;
a first terminal area in electrical contact with said first conductor; and
a second terminal area in electrical contact with said second conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for heating a substrate, said apparatus comprising:
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a substrate having a surface, said substrate being a glass material;
a first conductor adhered to said surface, said first conductor being formed from a conductive polymer thick film ink;
a second conductor adhered to said surface, said second conductor being formed from said conductive polymer thick film ink;
a resistive film in contact with said surface, said resistive film being formed from a first polymer thick film carbon ink having a specified conductivity, said resistive film in electrical contact with said first conductor, said resistive film in electrical contact with said second conductor;
a first terminal area in electrical contact with said first conductor;
a second terminal area in electrical contact with said second conductor. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus for heating a substrate, said apparatus comprising:
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a substrate having a surface, said substrate being a glass material;
a means for heating said substrate; and
a means for connecting said means for heating to an electrical power supply. - View Dependent Claims (14)
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15. A method of heating a substrate with a resistance heater printed on the substrate, said method comprising the steps of:
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(a) applying a conductive polymer thick film ink to a first selected portion of a surface of a glass substrate;
(b) applying a resistive polymer thick film ink to a second selected portion of said surface; and
(c) applying a voltage to said conductive polymer thick film ink. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification