The invention relates to a metal-ceramic substrate having a multilayer, plate-shaped ceramic material or substrate, which consists of an inner base layer of a silicon nitride ceramic and of at least one intermediate layer of an oxidic ceramic applied to a surface of the base layer, and having at least one metallisation which is connected to the intermediate layer, which is composed of the oxidic ceramic silicon dioxide (SiO2) in crystalline form in a random distribution or of magnesium silicate (MgSiO3/Mg2Si2O6) with zirconium silicate (ZrSiO4) and/or yttrium silicate (Y2Si2O3), the remainder being silicon dioxide (SiO2) in crystalline form and zirconium oxide (ZrO2), by direct bonding (DCB method).