| 摘要 |
An aluminum etchant includes 3-30 wt % of hydrochloric acid, 4-20 wt % of sulfuric acid, 1-5 wt % of oxidizing agent, 0.5-2 wt % of surfactant, and water for the rest. The etchant can produce circuits of 200-25 μm wide on an aluminum foil or aluminum plate. The circuit has good quality. Therefore, the invention is suitable for miniaturized products that require higher precision.
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