| 摘要 |
PURPOSE:To prevent a damage and a breakdown of a substrate and parts caused by the influence of preheating by a means for varying strong and weak distributions of power density of a laser light, and executing preheating to an object to be worked in a distribution area in which power density is weak. CONSTITUTION:A laser beam emitting part 1 is fixed to a robot hand 3 by an angle lock 2, and in a power density distribution of a laser beam 100 which is emitted, a weak part (a) and a strong part (b) of power density are generated. Subsequently, a robot arm 4 for holding a robot hand 3 is moved in the direction as indicated with an arrow A, and in the weak part (b) of power density, preheating of a lead 51 of a flat pack IC 5 of an object to be worked and paste solder 7 is executed, and in the strong part (a) of power density, the lead 51 of the flat pack IC 5 is soldered onto a substrate 6. In such a way, the automatization of a laser soldering work can be realized easily without damaging the substrate and parts. |
