Fuse Type Write-Once-Read-Many Memory Based On Silver Nanowires And System Application

Smart packaging record the relevant parameters of items during the process of transportation,so that the consumer can know the state of the goods in the logistics in the distance.Anti-fake is the most important requirement in logistics monitoring.Therefore,the security storage information and verification has become a research focus in the field of smart packaging.With the rapid development of electronic commerce in recent years,a large number of commodities are delivered to customers through express or other type of logistics,and various anti-fake methods has been applied to express parcels and packaging.However,anti-fake method stagnate in anti-counterfeiting packaging structural design,the optical properties of label or bar codes,two-dimensional code and other information service.Obviously,these methods are inconvenient and easy to counterfeit,which cannot meet the requirement of convenience and reliability of the anti-fake information service.Therefore,a more convenient and reliable method is needed for the storage and discrimination of anti-counterfeit information.Based on this demand,fusing printed memory in printing electronics is becoming a potential direction because of its superior performance and customizable writing mode.But the realization of fusing printed memory in smart packaging still faces challenges.On the one hand,the higher working current which needs to be further reduced to meet the low power requirements of the circuit.On the other hand,the existing work is only suitable for small-scaledevice fabrication in laboratory.It is difficult to meet the requirements of mass production in terms of process method and technology cost.New technologies are needed to solve these problems.Based on consideration and analysis of optimizing the performance of fusing printed memory for the smart packaging,this paper design and fabricate fusing printed memory using silver nanowires(AgNWs)to realize the fusing function and polytetrafluoroethylene(Teflon)for encapsulation.In the process,the AgNWs was coated with low cost and simple bar-coating method,which had better directional arrangement.By optimizing the material and coating process,the working current of the fusing printed memory prepared in this paper was reduced with the data writing time shortened in the meantime.The devices also presented high durability and bending resistance performance,which meets requirements for practical application.Based on the fabricated printed memory,a system consist of 4-bit memory label and near field communication(NFC)data acquisition circuit was constructed.A software developed in Android is run in the mobile phone to control the date writing and reading.The software in the mobile phone could control output voltage of the chip to realize the conversion of data writing mode and reading mode in this system.In the last part of the paper,the system was demonstrated in smart packaging to control the security data writing and reading through the NFC.The software has friendly customer interface,and operates is absolutely clear.It enables users to write passwords and check passwords conveniently and quickly,and improves the traditional anti-counterfeiting way.Furthermore,in order to verify the reliability of the system,this paper also carried out repeated reading tests of multiple devices.And after thousands of repeated reading,the components with different data writing was still showing the correct results,which fully proved the good reliability of the system.