Research On The Preparation Of Interlayer In Glass Frit Bonding Based On Electrostatic Spray Deposition

As an emerging method for the preparation of micro-nano film at domestic and overseas,Electrostatic Spray Deposition(ESD)technique is a method in which the electrified liquid is broken under high-voltage electrostatic field and then the particles are deposited on the grounded collector.ESD has been widely used in various fields and has made ideal progress.In this paper,ESD technology is applied to the preparation process of the intermediate layer in glass frit bonding,and a sleeve type auxiliary electrode is introduced to restrain the electrical jet to realize the precise deposition of the jet,and suppress the movement of the jet in the horizontal direction,thereby the deposition area can be decreased.The deposition mechanism during the ESD process is explored.It is found that an appropriate distance between the needle and the collector can ensure the uniformity of the deposition layer and reduce the deposition area;the supply speed of liquid and the moving speed of collector need to be matched with each other to affect the surface morphology of the deposited layer.The charge-to-mass ratio will reduce with the decrease of the applied voltage while the stability of the jet is improved.After optimization,the find determination of the experimental parameters in the paper:the distance between needle and collector is 2 mm,the supply speed of the solution is 300?l/h,the speed of the collector is 20 mm/s,the applied voltage 2kV.Which provides the experimental basis to the preparation of glass frit film.The COMSOL software is utilized to analyze the principle of auxiliary electrode on focusing the electrical field and the effect of the process parameters on the electric field.The ESD system with auxiliary electrode was optimized by the simulation results to restrain the electrical jet further.Then the simulation results are verified by the ESD experiments with auxiliary electrode.The line width of the glass frit film can be reduced from 794?m to 330?m with the auxiliary electrode.The horizontal movement of the electrical jet is restrained by the auxiliary electrode,which helps to reduce the deposition area and guides the accurate deposition of the electrical jet.Complex patterns such as the pentagonal star pattern and the mesh pattern are successfully printed by the ESD system with auxiliary electrode.The superimposition behavior is studied in detail,and the relationship between the thickness and the deposition time is y = 3.045x-3.1333.Finally,the glass frit film with thickness of 55.6 ?m is successfully fabricated.After the research in this paper,the influence of various factors in the ESD process on the deposition results and the constraint effect of the sleeve type auxiliary electrode on the electrical jet are determined.The precise control of ESD and the deposition of glass frit film pattern were achieved,which provides the theoretical and experimental basis for the application of ESD in glass frit bonding.