BINARY CRYSTALLIZABLE GLASS COMPOSITE FOR LOW-DIELECTRIC MULTILAYER CERAMIC SUBSTRATE

A binary crystallizable glass composite containing cordierite glass an d anorthite glass for applications in the area of low-dielectric multi layer ceramic packaging has been investigated. The initially amorphous glass composite forms crystalline phases of anorthite and cordierite during firing, and can be densified up to a relative sintered density greater than 97% at 875 degrees C for 15-60 min. The resultant composi tes have a dielectric constant in the range of 4.7-5.3 at 1 MHz and a linear thermal expansion coefficient of 3.7-5.1 x 10(-6) K-1 in the te mperature range of 20-200 degrees C.