Alumina ceramic multilayer substrate and manufacturing method thereof

摘要

The present invention relates to an alumina ceramic multi-layered engine and a method of manufacturing the same. The multi-layer substrate is characterized in that an alumina ceramic layer is laminated so that the mixing ratio of the alumina ceramic and the low-purity alumina ceramic is inclined. The method comprises the steps of mixing a high-purity alumina sintered compact composition and a low-purity alumina sintered compact composition with an organic solution to form a ceramic sludge; Mixing at least a high purity alumina sintered body composition and a low purity alumina sintered body composition at a predetermined ratio to form at least one composite alumina ceramic sludge having different mixing ratios; Forming respective green sheets having interconnections formed by a green sheet lamination method using each alumina ceramic sludge formed; And a step of laminating the formed green sheets so as to form an inclined composition from high purity to low purity and then sintering the same by a co-firing method to form a multilayered engine.;Therefore, in the present invention, wiring can be easily performed while preventing delamination or microcracking due to thermal stress, and thus a compact and high-density mounting is possible.