Frequently Asked Questions

　　1、 Degreasing (temperature 60-65 ℃)

　　1. Too much foam: abnormal quality caused by too much foam: poor degreasing effect, caused by mismatched bath solution.

　　2. Composition of particulate matter: The reason for the composition of particulate matter is that the filter is broken, the high-pressure water washing of the grinding machine is insufficient, and dust is brought in from the outside.

　　3. Finger prints cannot be degreased: Finger prints cannot be degreased due to low degreasing temperature and incorrect dispensing of medication.

　　2、 Micro corrosion (NPS 80-120G/L H2SO4 5% temperature 25-35 ℃)

　　1. The copper surface of the board is slightly white: the reason is due to insufficient grinding, oil removal, or contamination, and low concentration of liquid medicine.

　　2. The copper surface of the board is black: it cannot be washed clean after oil removal and is contaminated by oil removal. A pink surface on copper indicates a normal effect of micro etching.

　　3、 Activation (the color of the tank liquid is black, the temperature cannot exceed 38 ℃, and air cannot be pumped)

　　1. Sedimentation and clarification of the tank liquid:

　　Reason for sedimentation of tank liquid:

　　(1) The concentration of palladium in the added water immediately changes and the content is low (pre impregnation solution should be used for normal replenishment level)

　　(2) The concentration of Sn2+is low, the content of Cl - is low, and the temperature is too high.

　　(3) Excessive air intake leads to palladium oxidation.

　　(4) Contaminated by Fe+.

　　2. A silver white film appears on the surface of the liquid medicine:

　　The reason for the appearance of a silver white film on the surface of the potion is the oxidation of Pd to produce oxides.

　　4、 Speed up (processing time 1-2 minutes, temperature 60-65 ℃)

　　1. No copper in the hole: Reason: The accelerated processing time is too long, and Pd is also removed while Sn is removed.

　　2. Pd is prone to detachment at high temperatures.