Taiwan became an important OEM fabrication sites to every cell phone brand after 1995. The optical filter is necessary for cell phone optical components. The decorative coating also needed for cell phone name plate, window, and cover case. ETAFILM was built up in September 1999 at Jhongli city of Taiwan. The name of company ETAFILM was changed from 2022 to company KingXin Opto-Electronics. Form the beginning of Decorative coating, it induced thermal evaporation coaters to deposite decorative metallic thin film for cell phone display panel, case, plasitc cover....?