PURPOSE: To reduce fluctuations in resistance value under high temperature with excellent junction with an AlN substrate by containing mainly the powder of conductive material and of a borosilicate zinc glass and by mixing a specified amount of powder which is specified to the main constituent.

CONSTITUTION: A thick-file resistor paste excellent in junction with an AlN substrate is formed by containing mainly the powder of a conductive material and of a borosilicate zinc glass and is mixed with the powder of at least MnO2,TiO2, Cr2O3, and MoO3 by 40wt.% or less to the main constituent. Using such a thick-file resistor paste allows the formation of thick-films excellent in junction with an AlN substrate in high reliability with small fluctuations in resistance value under high temperature and in electric characteristics with small TCR.