| 摘要 |
PURPOSE:To suppress the generation of a solder ball, and to omit a cleaning process to be executed after soldering, by kneading fine particles of a solder alloy deformed aspherically by applying a mechanical pressure, and a flux, and forming a cream solder. CONSTITUTION:Solder particles 7 are put into a liquid in a pressure tank 6, it is pressed by a pressure member 8, and a desired solder powder is obtained. The pressure is applied by magnitude of the extent that the solder particles are deformed to an aspherical state. By mixing a flux in this amorphous solder powder, a cream solder is obtained. Since the solder powder is aspherical, it comes to scarcely flow by the flux, and scarcely becomes a solder ball. |
