CPC H01C 17/30 (2013.01) [G03G 15/2039 (2013.01); G03G 15/2057 (2013.01); H05B 3/02 (2013.01); H05B 3/12 (2013.01); H05B 3/283 (2013.01); H05B 2203/01 (2013.01); H05B 2203/013 (2013.01); H05B 2203/017 (2013.01); H05B 2203/02 (2013.01); Y10T 29/49099 (2015.01)] | 8 Claims |
1. A method of making a heater, comprising:
on an aluminum nitride base having equal to or less than 1% impurities, firing the base before layering any layers on the base;
layering on a topside and backside of the base a conductor layer from a conductive paste and letting dry the conductor layer on each side of the base;
firing the base having the conductor layers on each side of the base;
layering a resistive layer from a resistor paste on the base such that the resistive layer connects to the conductor layer on the topside of the base and letting dry the resistive layer;
firing the base having the resistive layer and the conductor layers on each side of the base; and
layering at least four layers of glass over the resistive layer, each instance of said layering the at least four layers of glass including layering a glass, drying the glass and firing the base including the glass said layered.
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