Resistive paste for the formation of electrically heat-generating thick film
AssigneeDaejoo Fine Chemical Co., Ltd.
InventorsKi-Woong Lee, Jong-Hyun Park, Kyung-Won Chung
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Abstract
A resistive paste composition comprising 5 to 75% by weight of ruthenium(Ru) metal or ruthemium oxide particles having a specific surface area of 5 to 30 m2/g, 5 to 75% by weight of silver(Ag) metal or its compound particles having an average particle size of 0.1 to 3 μm and a maximum particle size of 8 μm or less, 5 to 40% by weight of a glass frit having a softening point of 400 to 550° C. and 5 to 45% by weight of an organic binder can be coated by a conventional screen-printing or dipping method on a substrate and then calcined at a low temperature of about 500 to 600° C. to form an electrically heat-generating thick film layer having good stability, uniformity and heat-up characteristics.
Claims11
A resistive paste composition for the formation of an electrically heat-generating layer, which comprises (a) 5 to 75% by weight of particles of ruthenium(Ru) metal or an oxide thereof having a specific surface area of 5 to 30 m2/g, (b) 5 to 75% by weight of particles of silver(Ag) metal or a compound thereof having an average particle size of 0.1 to 3 μm;
- the maximum particle size not exceeding 7 μm, (c) 5 to 40% by weight of a glass frit powder having a softening point of 400 to 550° C. and (d) 5 to 45% by weight of an organic binder, the glass frit comprising 40 to 90 wt % of Bi2O3, 5 to 30 wt % of SiO2, 5 to 30 wt % of B2O3, and 2 to 40 wt % of BaO.
Dependencies are inferred from the claim text.