| 摘要 |
PROBLEM TO BE SOLVED: To prevent the breaking of an internal circuit conductor due to abnormal shrinkage and to improve reliability at a low cost by incorporating Al2 O3 , SiO2 , B2 O3 , MgO, CaO and BaO. SOLUTION: This dielectric material contains, by weight, 3.0-8.0% Al2 O3 , 9.0-29.0% SiO2 , 7.0-10.5% B2 O3 , 20.0-30.5% MgO, 4.5-24.0% CaO and 16.0-24.5% BaO. |
