| 摘要 |
PURPOSE:To make possible cleaning by a solvent containing principally freon of a printed substrate safely after soldering by using rosin amine adding halogen acid as a flex. CONSTITUTION:At the soldering of a printed substrate, a flux for soldering which is principally rosin amine, and compounded amine halogen acid, halogen acid and stearate acid, palmitin acid, azipin acid and compounds of metallic salt therein are used. As the printed substrate after soldering is easily cleaned by solvent containing principally freon, soldering having high electrical insuration can be carried out. |
