CIRCUIT BOARD AND PRODUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To prevent the disconnection of a conductive path in a circuit board and a production method therefor. SOLUTION: This circuit board is provided with a substrate 1 composed of the mixture of a fine metal oxide powder, a thermosetting resin and a pregel, conductive patterns 2 respectively provided on the front and rear faces of the substrate 1, and a through hole 4 electrically connecting the conductive patterns 2 on the front and rear faces through the substrate 1.