Deposition of etching solution in printed Circuit

Deposition of etching solution in printed Circuit


Reasons:

(1) Ammonia content is too low

(2) Water dilution excess

(3) Solution specific gravity


Solutions:

(1)Adjust the PH value to reach the specified value of the process or appropriately reduce the exhaust volume.

(2)Adjust strictly in accordance with the requirements of the process or properly reduce the amount of air extraction.

(3)According to the process requirements, some solutions with high specific gravity are discharged and added with ammonium chloride and ammonia solution after analysis, so that the specific gravity of the etching solution is adjusted to the range permitted by the process.