COMPOSITE LAMINATE AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To inexpensively provide a composite laminate suitable for an application as a multilayer circuit board capable of advantageously forming an external conductive film finely patterned on a main surface by providing the surface having good surface roughness. SOLUTION: The composite laminate is provided by preparing a raw laminate 1 having a first sheet layer 4 containing a glass powder 3 and a second sheet layer 6 provided to give at least one main surface brought into contact with the layer 4 and containing a ceramic powder 5, heat treating the laminate 1 at a temperature capable of melting the powder 3 while sintering the powder 5 to fix the layer 4 by the molten glass 9 and impregnating the layer 5 with the powder 5 so as to fix the powder 5 to one another. Surface roughness of the main surface is influenced by a particle size of the powder 5 contained in the layer 6. Good surface roughness can be obtained by finely granulating only the powder 5.