Microstmcture Technology For Anti-counterfeiting

With the popularizing of the high accuracy printer and scanner, the Anti-Counterfeitingprinting is more difficult day by day. The counterfeiting of banknotes and other financialtransaction documents as well as visas, passports, ID cards, other official Governmentsecurity papers has long been an active area of criminal activity. The counterfeiting ofsoftware, pharmaceuticals and brand name products is also a significantly growing area oforganized crime. Now, a great amount of fake and shoddy commodities bring the enormousdestruction for the brand enterprise and the name brand commodity, caused the enterpriseand the consumer has suffered the massive loss. I proposed that one kind simple, effective,practical forgery-proof plan appears very essential. Firstly, I elaborate holographicanti-counterfeiting technology in the article, and propose a practical microstructureanti-counterfeiting plan. The fabrication of geometric shapes including micro-mirrors hasbeen achieved by using the technique of graytone lithography. Two different images wereencoded into two alternating channels, then when we change angle of viewing, we canobserve optically variable effects between the images; Secondly, we introduce nanoimprinttechnique which can produces submicrometer scale periodic gratings to obtain diffractiveoptically variable image; Finally, we generate a full coloured image with a tactile quality bylaser ablating multiple layered coloured ink which have been printed upon ordinary plasticfilm. The aim of the work is to investigate the characteristics and feasibility of the manner.