A method of forming one or more high temperature co-fired ceramic articles, comprising the steps of:—

a) forming a plurality of green compacts, by a process comprising dry pressing a powder comprising ceramic and organic binder to form a green compact;
b) disposing a conductor or conductor precursor to at least one surface of at least one of the plurality of green compacts to form at least one patterned green compact;
c) assembling the at least one patterned green compact with one or more of the plurality of green compacts or patterned green compacts or both to form a laminated assembly;
d) isostatically pressing the laminated assembly to form a pressed laminated assembly;
e) firing the pressed laminated assembly at a temperature sufficient to sinter the ceramic layers together.