| 摘要 |
PURPOSE:To provide a lead bending method by which leads can be bent without rubbing the mounting surfaces of the leads on a substrate. CONSTITUTION:In a pre-bending process, the front ends of leads 2 are formed in circular arc shapes. In a first bending process, the leads 2 are bent so that the center positions of the circular arcs can move toward a package 1 from the pre-bent positions while the leads 2 are returned to almost horizontal positions. In a second bending process, the leads 2 are bent downward to 45 deg. positions while the side faces of the leads 2 are pressed. In a third process, the leads 2 are turned to the package 1 side and bent to almost 90 deg. positions while the side faces of the leads 2 are pressed. In a fourth process, in addition, the leads 2 are bent until the front end sections of the leads 2 reach the rear surface of the package 1 while both edge sections of the circular arcs are pressed. |
