CERAMIC MULTILAYER WIRING BOARD AND METHOD OF PRODUCING SAME

摘要

The multi-layer ceramic substrate of this invention includes conductor layers and insulating layers disposed between the conductor layers. The insulating layers include the layers of a sintered body principally composed of mullite and the layers of a sintered body principally composed of alumina. This multi-layer ceramic substrate is produced by laminating the green sheets and sintering the laminate. The green sheets principally composed of mullite and the green sheet principally composed of alumina are prepared, and they are laminated and sintered.