Patent ID: 8680187
Filing Date: 2014-03-25
Classification: B23K

Abstract:
1. A method of soldering components on a printed circuit board, the method comprising: applying a modified rosin mildly activated flux on a substrate of the printed circuit board, wherein the modified rosin mildly activated flux comprises a rosin mildly activated (RMA) flux material and a randomizing additive, wherein the rosin mildly activated flux is capable of being cleaned using an aqueous solution, and the randomizing additive is selected from the group consisting of castor bean oil, corn oil, grape seed oil, olive oil, soybean oil, sunflower seed oil, walnut oil, avocado oil, flax seed oil, glycerin, jojoba, hemp oil, lanolin, tea tree oil, wheat germ oil, benzo-alkyl dials, ethylene adipates, and combinations thereof; soldering at least one component to the substrate of the printed circuit board; removing the modified rosin mildly activated flux from the printed circuit board using an aqueous solution; and after removing the modified rosin mildly activated flux from the printed circuit board, rinsing the printed circuit board in de-ionized water heated to a temperature ranging from about 80 to about 90° C., and drying the circuit board.