Wiring board and its manufacturing method

摘要

In a compact wiring board of efficient cooling performance allowing a large current to flow, obtain a wiring board capable of preventing parts from slipping out only by inserting lead bases. The constitution comprises a step of individually preparing a metal plate having a wiring pattern and a provisional linking portion for linking the wiring pattern, and an insulating material sheet for reinforcement, a step of laminating and integrating them, and a step of cutting off and removing the provisional linking portion thereafter. <IMAGE>