ELECTRIC CIRCUIT BOARD WITH THROUGH-HOLE ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive electric circuit board with through-hole electrodes while forming fine through-hole electrodes having excellent strength.SOLUTION: The electric circuit board with through-hole electrodes includes an electrode formed inside a through-hole by a vacuum impregnation method when the through-hole electrode is formed in a substrate before an electric circuit is formed at a first surface 07 and a second surface 08 where no electric circuit is formed.