Nanosilver Conductive Ink Sintered At Low Temperature And Research For Inkjet Printing

Recently,more and more attention has been paid to the fabrication of semiconductor devices and conductive circuits by utilizing printed electronics technology and inkjet printing as one of the essential parts of this technology also aroused widespread concern.The main work of this paper was to prepare the silver nanoparticles(Ag NPs)with stable performanceand uniform shape,which could be configured as inkjet ink.Moreover,single-layer and multi-layer conductive line printing experiments were carried by using of inkjet ink.Then,we optimized the conditions of experimental and printer paramete to get the outstanding performance of the printed Ag line.First,Ag NPs prepared with two kinds of protective agents were fabricated,and characterized by different methods.The diameter of Ag NPs were about 20 nm when used polyacrylic acid as protective agent and about 50 nm when used laurylamine as protective agent.Because polyacrylic acid was water-soluble material,weakly adsorped on the surface of Ag NPs,and easily removed,which was propitious to bechoosen as the protective agent.Then related additives were added to the conductive ink to improve the performance of inkjet.Meanwhile,epoxy resin plate,photo paper and polyethylene terephthalate were selected as the substrate for printing experiment,and surface modification of the substrate was carried out to improveboth printing line's adhesion and resolution of conductive pattern.The formation of film with epoxy resin as substrate was analyzed as well as experimental conditions to overcome the effect of coffee ring.We also studied the conduction mechanism and the relationship between sintering temperature,printing layer,sintering time and sample resistivity.Photo paper as substrate,sintering at 110 ? for 1 h,Ag wire with a resistivity of 8 ??·cm was obtained.Finally,combined the two technologies-the spin coating and inkjet printing,used polyethylene terephthalate as substrate,polymethyl methacrylate as insulation layer,to actualize experimental exploration for multi-layer circuit,which provides the prospect for further research.