Nanometer silver paste for terminal electrode of multi-layer ceramic capacitor and method for preparing same

Abstract

The invention belongs to the technical field of electronic and micro-electronic materials, and particularly relates to a nanometer silver paste for a terminal electrode of a multi-layer ceramic capacitor and a method for preparing the same. The nanometer silver paste is prepared from the following components by mass percentage: 45 and 80 percent of silver powder of which the grain diameter is between 10 and 100nm, 10 to 40 percent of organic carrier, 1 to 10 percent of boron aluminum titanium silicate glass powder, 1 to 9 percent of dispersant, 0.5 to 9 percent of defoamer and 0.5 to 8 percent of surface active agent, wherein the organic carrier is an ethyl acetate or ethyl acetate system of polyacrylic resin, and the molecular weight of the polyacrylic resin is between 10,000 and 15,000. In the process of producing and processing the paste, no hazard exists, which facilitates environmental protection; the boron aluminum titanium silicate glass powder and the ceramic substrate of the corresponding multi-layer ceramic capacitor are almost the same or similar in physical property, so that the boron aluminum titanium silicate glass powder and the ceramic substrate of the corresponding multi-layer ceramic capacitor can be formed by co-sintering for one time.

Description

technical field [0001] The invention belongs to the technical field of electronics and microelectronic materials, in particular to a nano-silver paste used for terminal electrodes of multilayer ceramic capacitors and a preparation method thereof. Background technique [0002] With the rapid development of new materials, new processes and new science and technology, microelectronic materials have also been developed rapidly, and are getting closer and closer to people's daily life. As an indispensable part of microelectronic materials, thick film process technology forms integrated circuits or electronic components in the form of thick film screen printing with various components (such as micro resistors, micro capacitors, etc.) with different electrical properties. Thus forming microelectronic products with high integration, stable performance and low price. [0003] Electrode paste in electronic paste is a material for preparing functional electrodes of thick-film circuits...

AI Technical Summary

Problems solved by technology

However, most of the electrode pastes for multilayer ceramic capacitors in my country still rely on imports, and the preparation technology of electrode silver paste for domestic multilayer ceramic capacitor electrode pastes has not yet made a breakthrough, and the performance of the pastes is still comparable to that of foreign manufacturers. There is a certain gap, mainly due to the inability to solve the problem of the primary co-firing stability of silver electrode paste for multilayer ceramic capacitors and multilayer ceramic capacitors under the conditions of low sintering temperature and no harmful elements such as lead in the inorganic binder. , the yield rate of finished products is insufficient