The low temperature calcination porcelain constituent and the low temperature calcination porcelain and the wiring substrate null which uses

摘要

PROBLEM TO BE SOLVED: To provide a low-temperature firing ceramics composition suitable for an insulation board of a wiring board whose thermal expansion coefficient is high, dielectric loss is low and decrease in strength after heat cycle is little, the low-temperature fired ceramics and the wiring board using the above ceramics.;SOLUTION: The low-temperature firing ceramics composition contains Si, Ba, B, Al and Zr whose contents are 55-70 wt.% expressed in terms of SiO2, 20-40 wt.% expressed in terms of BaO, 1-8 wt.% expressed in terms of Al2O3 and 0 wt.% and ≤7 wt.% expressed in terms of ZrO2, respectively. The above composition which contains a quarts crystal of ≥30 wt.% is used as the insulation board 1 of the wiring board A.;COPYRIGHT: (C)2002,JPO