Thick film resistor composition.

摘要

To provide a thick film resistor composition which gives a small length effect on the TCR and also small variations in the resistance values and the TCR on firing the overcoat glass. A thick film resistor composition comprising an electrically conducting component, ruthenium oxide and/or glass binder comprising a mixture of a first glass comprising 30-60% by weight of SiO2, 5-30% by weight of CaO, 1-40% by weight of B2O3, 0-50% by weight of PbO and 0-20% by weight of Al2O3 in which the total of SiO2, CaO, B2O3, PbO and Al2O3 amounts to at least 95% by weight thereof; and a second glass comprising a PbO-SiO2 type glass with the PbO amounting to at least 50% by weight thereof, wherein the ratio of said electrically conducting component of said thick film resistor composition is 10-50% by weight, that of the first glass is 5-35% by weight and that of the second glass is 5-40% by weight.