A stripping process of solder resist/character ink
A process and character technology, applied in the field of stripping technology, can solve the problems of copper surface corrosion of printed circuit boards, high waste rate of character ink boards, and high production costs, and achieve the effects of improving yield, low preparation cost and low price.
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Embodiment 1
[0013] First configure the stripping agent aqueous solution 10wt.% of solder resist / character ink, wherein the stripping agent is NaOH 160g / L, NaOH 2 S 2 o 3 10g / L and TX-10 1ml / L; the alkalinity of the stripper aqueous solution is 4.0N, the specific gravity is 1.05, and the water in the stripper aqueous solution is deionized water. Use a 316 stainless steel heater to heat the 316 stainless steel stripping cylinder to 80°C, put the reworked printed circuit board 316 stainless steel insert into the 316 stainless steel stripping cylinder and soak for 1 hour. Take out the 316 stainless steel socket of the soaked reworked printed circuit board, rinse it with tap water or nylon brush at room temperature; and dry it at 100°C for 1 hour to transfer to the pre-treatment process of solder mask / character ink screen printing. Please refer to Table 1 for the quality performance of the 316 stainless steel frame after the stripping process.
[0014] Table 1
[0015] Test items...
Embodiment 2
[0018] First configure the stripping agent aqueous solution 16wt.% of solder resist / character ink, wherein the stripping agent is NaOH 160g / L, NaOH 2 S 2 o 3 10g / L and TX-10 1ml / L; the alkalinity of the stripper aqueous solution is 4.0N, the specific gravity is 1.25, and the water in the stripper aqueous solution is deionized water. Use a 316 stainless steel heater to heat the 316 stainless steel stripping cylinder to 85°C, put the reworked printed circuit board 316 stainless steel insert into the 316 stainless steel stripping cylinder and soak for 1 hour; soak the reworked printed circuit board Take out the PP frame, wash it with tap water or nylon brush at room temperature; and dry it at 100°C for 1 hour to transfer to the pre-treatment process of solder mask / character ink screen printing. Please refer to Table 2 for the quality performance of the 316 stainless steel frame after the stripping process.
[0019] Table 2
[0020] Test items
[0021] It can be se...
Embodiment 3
[0023] First configure the stripping agent aqueous solution 10wt.% of solder resist / character ink, wherein the stripping agent is NaOH 160g / L, NaOH 2 S 2 o 3 10g / L and; TX-10 1ml / L; the alkalinity of the stripper aqueous solution is 4.0N, the specific gravity is 1.053, and the water in the stripper aqueous solution is deionized water. Use a 316 stainless steel heater to heat the 316 stainless steel stripping cylinder to 83°C, put the reworked printed circuit board 316 stainless steel insert into the 316 stainless steel stripping cylinder and soak for 1 hour; soak the reworked printed circuit board The 316 stainless steel frame is taken out, rinsed with tap water or nylon brush at room temperature; and dried at 100°C for 1 hour to transfer to the pre-treatment process of solder mask / character ink screen printing. Please refer to Table 3 for the quality performance of the 316 stainless steel frame after the stripping process.
[0024] table 3
[0025] Test items ...
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