PURPOSE: To provide the titled composition composed of specific ratios of ZnO, B2O3, SiO2, Al2O3, BaO, SnO2, etc., effective to improve the wettability of the conductor with solder, and giving a circuit resistor having small variation of the resistance.

CONSTITUTION: A mixture composed of 40W65wt% of ZnO, 15W27wt% of B2O3, 4W20wt% of SiO2, 2W8wt% of Al2O3, 1W10wt% of BaO, 0.05W2.0wt% of SnO2, 0.05W5.0wt% of MgO+CaO+SrO, and 0.05W3.0wt% of Li2O+Na2O+K2O is melted with heat, formed to a plate, and crushed to obtain a glass composition for insulation layer. A paste obtained by kneading the composition with a vehicle is applied to an insulation substrate having a circuit thereon, and baked at about 650°C to form an insulation layer.