The invention discloses an aluminum-based circuit acidic
etching solution, which relates to the technical field of
etching, and comprises the following components by
mass concentration: 30-60 g / L of composite inorganic acid, 10-20 g / L of a
wetting agent, 5-15 g / L of a stabilizer, 5-15 g / L of an accelerator, 6-15 g / L of a brightener, 0.5-2.5 g / L of a composite anti-lateral
corrosion agent, and 2-4 g / L of a complexing agent. According to the
acid etching solution for the aluminum-based circuit, the lateral
etching rate of a 50-75-micron thin circuit can be lower than 30%, the
etching rate is stable, the etched appearance is bright and uniform, and the circuit does not have a burr phenomenon; the
wetting agent is added, so that the etching uniformity can be improved, the burr phenomenon can be prevented, the adsorption rate of inorganic acid can be increased for the burr part which is difficult to treat, and the
corrosion efficiency of the burr part can be improved; by adding the brightener, the phenomena of uneven partial etching and blackening of the surface after etching can be solved.