PRINTED WIRING BOARD, METALLIC PART, AND ELECTRIC CONNECTION STRUCTURE

摘要

PROBLEM TO BE SOLVED: To make it possible to provide electrical connection surely with uniform contact at a plurality of points in a large area between a conductive pattern (for example, copper foil lands) and a metallic part on a printed wiring board, and to select each position and the number of a conductive projected parts freely with high degree of freedom in layout by eliminating the dipping of the printed wiring board in melted solder in a solder bathtub. SOLUTION: In an electric connection structure, a face of a conductive pattern 2 on a printed wiring board 21 and a flat face 25a of a metallic part 25 are put in parallel with each other and fixed with a bolt 26 which is passed through. A plurality of small projected conductive parts 23 with the same projection length are arranged dispersedly. Then, a screw is passed for screw fixing through the conductive pattern and the flat face part of the metallic part while the upper face of each small projected parts and the flat face of the metallic part are fitted under pressure.