| 摘要 |
PURPOSE:To provide a composite material having satisfactory mechanical strength as a circuit board, a coefft. of thermal expansion close to that of silicon and a low dielectric constant, and capable of firing at a low temp. CONSTITUTION:This composite material contains cordierite-anorthite-boron powder and powder of a compd. selected from the group of MgO, CaO, Al2O3, SiO2, ZrO2 and compds. forming the oxides. |
