| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring substrate having as an insulating substrate a porcelain which can be sintered at 800 to 1,000 deg.C, has a low dielectric constant in a high-frequency region, a low dielectric loss, a high strength and a thermal expansion coefficient similar to that of a printed substrate, and can be mounted in high reliability. SOLUTION: This wiring substrate comprises an insulating substrate and ball-like terminals disposed on the bottom surface of the insulating substrate. The insulating substrate comprises a porcelain which is obtained by molding a mixture and then sintering the molded article, and has a diopside type oxide crystal phase (DI) as a main crystal phase. The mixture comprises 50 to 95 wt.% of a glass containing SiO2, Al2O3, MgO and CaO and capable of depositing the diopside type oxide crystal phase (DI), 5 to 49.9 wt.% of quartz and/or amorphous silica, and 0.1 to 20 wt.% (converted into MgO) of at least one of MgO, MgCO3, Mg(OH)2 and an Mg-Si complex oxide. |
