Patent ID: 6531181
Filing Date: 2003-03-11
Classification: C03C,H01B,H05K

Abstract:
A process for producing a conductive coating on a glass or enameled steel substrate, the method comprising:(a) applying to the substrate a layer of a paste, wherein the paste comprises: (i) a granular metal powder consisting essentially of aluminum powder having a d50 value in the range of 1 to 10 &mgr;m in a quantity of 40 to 80 wt. % and from 0 to 40 wt. % silver powder; (ii) one or more glass frits having an initial softening temperature in the range of 400 to 700Â° C. and a d50 value in the range of 1 to 10 &mgr;m in a quantity of 5 to 40 wt. %; (iii) a liquid or thermoplastic medium comprising one or more copolymers and/or solvents in a total quantity of 10 to 35 wt. %; and (iv) a sintering aid in pulverulent form in a quantity of 0 to 10 wt. %; and (b) heating the layer at a temperature in a range of from about 500 to about 750Â° C.