Ceramic substrate used for fabricating electric or electronic circuit

摘要

A ceramic substrate is used for an electric or electronic circuit comprises a ceramic plate (11) formed of a substance mainly composed of aluminum nitride, and conductive islands (12/13) formed of aluminum or an aluminum alloy and bonded to one surface of said ceramic plate for providing conductive paths to circuit components (16/17) connected thereto, wherein the aluminum or aluminum-alloy islands decrease the total weight of the ceramic substrate and enhance a resistance against repetition of a thermal stress.