Improvement in salt-water durability of Ag thin films deposited by magnetron sputtering using argon and nitrogen mixed gas

► Ag thin films were deposited by magnetron sputtering. ► Salt-water durability was improved using argon and nitrogen mixed gas. ► Meanwhile reflectance exhibited almost same values despite nitrogen concentration. ► Surface roughness and crystallite size decreased by nitrogen addition. ► Those microstructure change should brought improvement of durability.