Production of a ceramic substrate comprises preparing a base body having a stack of layers containing non-sintered ceramic material, arranging and fixing a rigid constrained layer to the uppermost layer of the stack, and removing

摘要

Production of a ceramic substrate comprises: (a) preparing a base body (2) having a stack (2a) of layers (3) containing non-sintered ceramic material; (b) arranging a rigid constrained layer (4) on the upper surface (6) of the uppermost layer (7) of the stack; (c) fixing the constrained layer to the uppermost layer of the stack and sintering the stack; and (d) removing the constrained layer. Preferably sintering is carried out without using external forces. The constrained layer contains pores into which a sintering agent penetrates during sintering. The constrained layer is made from Al2O3. The sintering agent is made from glass.