abstract |
(57) [Summary] [Purpose] To remove the ionic components that remain in the flux residue after soldering, which cause corrosion and decrease in insulation resistance, and make a reliable soldered part. [Structure] After soldering, 100 to 1 items to be soldered By reheating to a temperature of 80 ° C., the ionic components remaining in the flux residue are volatilized by heat. |