| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed board capable of surface mounting by directly soldering a coin type battery in a simplicity, a low cost and a space saving. SOLUTION: The printed has a wiring for electrically connecting a land or components each for solder mounting various components to an insulating substrate 1, setting a circular area of a diameter equal with a diameter of a negative electrode surface of the coin type battery on one side of the insulating substrate, forming a through hole including an inner surface conductive layer 3a and a negative electrode land 5a in the inner of the circular area, forming a positive electrode land away by a distance corresponding to a radius of an upper circular of the positive electrode of the coin type battery from a center of the circular area and a positive electrode wiring 7 coupled with the positive electrode land in the outer of the circular area, and forming a negative electrode wiring 8a coupled with another end circular of the inner surface conductive layer 3a in another surface of the insulating board. |
