A Analysis Method for Ceramic Grains of High-capacity MLCC
It holds significant research implications that size,shape and distribution of the ceramic grains in the dielectric layer of chip multilayer ceramic capacitor(MLCC)for improving the performance of ML-CC.In order to analyze the morphology of ceramic grains in dielectric layer of high capacity MLCC,in this paper,the metal electrode layer of MLCC profile was replaced by ferric chloride,put into a furnace for thermal corrosion,then observed and analyzed the sample by SEM.Using a combination of chemical corrosion and thermal corrosion,the result indicated that after the inner electrode was corroded by ferric chloride,the heating rate was 30℃/min in a box nitrogen atmosphere furnace,and the maximum tem-perature and holding time were controlled.The grain boundary of the corroded ceramic was clear and there was no metal electrode expansion shielding around them.The research result in this paper can be used to analyze the ceramic grains of MLCC dielectric layer.
multi layer ceramic capacitorsceramic grainsferric chloridebox atmosphere furnacethermal corrosion