BigPatents India

The present invention relates to a method of manufacturing of tin dioxide coated ceramic insulating substrate. The product is useful for gas sensor applications. The process steps are: cleaning by known methods a ceramic insulating substrate, electroding by known methods the ends of the substrate by gold based electrode followed by lead attaching with gold wire, gold alloy wire or platinum wire by firing at a temperature in the rannge of 900-10000C, applying by rubbing characterized in that a fugitive conductive coating of a graphite clay mix onto the substrate, placing the substrate at the positive terminal of a conventional electrophoretic deposition set-up under a suspension containing SnO2 coating and finally firing the said coating at a temperature in the range of 500-10000c for 1-4 hours to obtain coated ceramic insulating substrate.