US 11,862,366 B2
Making an aluminum nitride heater
Makoto Aoki, Ishikawa (JP); and Jerry Wayne Smith, Irvine, KY (US)
Assigned to LEXMARK INTERNATIONAL, INC., Lexington, KY (US)
Filed by LEXMARK INTERNATIONAL, INC., Lexington, KY (US)
Filed on Jan. 12, 2023, as Appl. No. 18/096,275.
Application 18/096,275 is a division of application No. 16/782,287, filed on Feb. 5, 2020, granted, now 11,676,746.
Prior Publication US 2023/0154656 A1, May 18, 2023
Int. Cl. H01C 17/30 (2006.01); H05B 3/28 (2006.01); G03G 15/20 (2006.01); H05B 3/02 (2006.01); H05B 3/12 (2006.01)
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
OG exemplary drawing
 
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.