A degreasing method in the surface treatment process of rolled copper foil

Abstract

The invention discloses a degreasing method adopted in the rolled copper foil surface treatment process. Rolled copper foil is subjected to cathode electrolytic degreasing and anode electrolytic degreasing in sequence, and anode electrolytic degreasing is added compared with the prior art, so that the rolled copper foil is subjected to degreasing treatment performed through hydrogen and oxygen in sequence. Obviously, both the total molar weight and the total kinetic energy of hydrogen and oxygen are larger than the molar weight and the kinetic energy of single hydrogen, the removing degree of remaining grease is remarkably increased, the grease remaining amount of the degreased surfaces of the rolled copper foil is reduced, the single-face grease remaining amount of the rolled copper foil can be reduced by 3 mg / m<2>, normal operation of the following electroplating process such as roughing treatment is facilitated, and the surface quality, the inner quality, the mechanical performance, the electrochemical performance and the like of the rolled copper foil produced after the following electroplating process such as roughing treatment are further guaranteed or improved.

Description

technical field [0001] The invention relates to the technical field of rolled copper foil processing, in particular to a degreasing method in the surface treatment process of rolled copper foil. Background technique [0002] Rolled copper foil is made by smelting and processing copper into ingots, then hot-rolling, rough rolling and finishing rolling to make 0.1mm ~ 0.15mm copper foil base material, and finally rolled repeatedly by copper foil rolling mill. Formed, its thickness is usually 6 μ m ~ 70 μ m. Therefore, the crystalline structure of rolled copper foil is a sheet structure, which is superior to electrolytic copper foil in terms of strength and toughness. In addition, the calendered copper foil has a higher density and a smoother surface, which is more conducive to the rapid transmission of signals behind the circuit board. It is widely used in printed circuit boards with high-frequency high-speed transmission and fine lines. [0003] Rolled copper foil is made b...

AI Technical Summary

Problems solved by technology

[0006] At present, the electrolytic degreasing process is usually used in the prior art to degrease the rolled copper foil. However, after the electrolytic degreasing treatment, the residual oil on the surface of the rolled copper foil is 5mg / m 2 ~10mg / m 2 , the amount of residual oil is still high, and it will still have a significant negative impact on the normal progress of the electroplating process such as subsequent roughening treatment; and in the current electrolytic degreasing method, the rolled copper foil is directly electrically connected to the negative pole of the DC power supply, as The reduction reaction at the cathode produces hydrogen gas, which enters the rolled copper foil by infiltration, etc., which can easily cause "hydrogen embrittlement" of the rolled copper foil

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