The invention generally relates to a composite, comprising a layer sequence; wherein the layer sequence
a) comprises as layers
i) a first layer, comprising
A. a first ceramic, and
B. a first layer surface,

ii) a second layer,
A. comprising a second ceramic,
B. superimposing the first layer surface;

b) comprises
i) a hole, connecting through each layer of the layer sequence;
ii) a cermet;

wherein the cermet comprises a first part and a second part;
wherein the first part is comprised by the hole;
wherein the second part is comprised between the first layer and the second layer;
wherein the cermet is in one piece.
The invention further relates to a process for manufacturing a composite, comprising a cermet feedthrough; to a composite obtainable by said process; to a device comprising a composite according to the invention; and to a use of a plurality of ceramic green sheets and a composition to produce a composite according to the invention.