Nano-silver etchant, method for preparing patterned nano-silver conducting film and touch sensor

The invention provides a nano-silver etchant. The nano-silver etchant is specifically prepared from 0.01-50% of silver etchant, 50-99.9% of solvent and 0-10% of additive. The nano-silver etchant can react with silver to generate a non-conductive substance, so that nano-silver conducting film etching is achieved. By the adoption of the nano-silver etchant and technologies such as yellow light and ink-jet printing, a patterned nano-silver conducting film can be prepared, and a basis is provided for the application of the nano-silver conducting film in electronic industries such as touch sensors, wearable devices, semiconductor display and illumination and solar cell panels.