A kind of circular dot silver paste and preparation method thereof

Abstract

The present invention belongs to the technical field of electronic materials, in particular to a circular silver paste and a method of preparation thereof. The weight of the silver paste is grouped into crystalline large particles silver powder 40%-45%, silver powder 40%-45%, organic carrier 5%-15%, glass or inorganic oxide 0.1% -3.0%, organic additive 0.5%-1%. Wherein, the particle size of the crystalline large particle silver powder is 2-3 microns, the particle size of the silver powder is 0.3-0.8 microns. The preparation method is to first batch the silver powder, organic carrier, inorganic additive, and organic additive according to the percentage by weight, and then mix it in a vacuum mixer, and finally grind it to 10.0 μm or less with a three-roll rolling mill. The circular point of silver paste is used in the MLCI wet process production line, the printing performance is good, the media pulp is delayed, the automatic point of display is round, and it is clear and uniform. After the sintering of the apparent point silver paste matches the shrinkage of the porcelain body, it plays a good role in connecting the upper and lower electrode layers. The final product has no short circuit, no circuit break defects, and excellent reliable performance and electrical performance.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a circular dot silver paste and a preparation method thereof. Background technique [0002] With the rapid development of electronic information industries such as mobile phones and computers, electronic components are constantly developing towards miniaturization, light weight, high performance and high reliability. In recent years, with the continuous development and maturity of the domestic technology of laminated inductors, their consumption and output have shown a trend of rapid development in China. As domestic manufacturers of stacked inductors continue to increase, domestic raw materials are gradually becoming mature. Zhaoqing Chenye, as the best supplier of inductor electrode materials in China, has successfully developed MLCI inner electrodes after several years of hard work. The paste for external electrodes has been supplied stably in batches...

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Problems solved by technology

[0004] At present, in the domestic MLCI production process, among the point electrode slurry products used, there is only a relatively mature product from FLU0R in the United States, and this product has been promoted in China for many years, and it can no longer meet the continuous miniaturization requirements of MLCI products.

Moreover, due to the relatively long geographical distance between foreign product suppliers and cultural differences, it is relatively inconvenient to communicate and the speed of improvement is slow. Therefore, for domestic inductor manufacturers, it is urgent to develop a new product together with material manufacturers. Newer and better point electrode paste products are used in smaller specification MLCI products to improve product qualification and enhance the competitive advantage of products in the international market

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