Copper inner electrode conductive paste for multilayer ceramic capacitor and application of copper inner electrode conductive paste

A technology of multi-layer ceramics and conductive paste, applied in the direction of fixed capacitor electrodes, laminated capacitors, capacitors, etc., can solve the problems of fast shrinkage, easy oxidation of copper paste, electron migration, etc., to prevent oxidation and improve the continuity of the copper layer , good conductivity
CN113178328AActive Publication Date: 2021-07-27大连海外华昇电子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
大连海外华昇电子科技有限公司
Publication Date
2021-07-27

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Abstract

The invention provides a copper inner electrode conductive slurry for a multilayer ceramic capacitor and an application of the copper inner electrode conductive paste. The conductive paste comprises the following raw materials in parts by mass: 40-50 parts of copper powder; 0.1 to 2 parts of tantalum powder; 1-5 parts of ceramic powder; 0.1-2 parts of a dispersant; 0.1 to 0.2 part of a stabilizing agent; and 22.1 to 43 parts of glue. The glue comprises the following substances: an organic solvent, resin and a thixotropic agent in a mass ratio of (80-98): (2-4): (0.1-0.2). According to the invention, tantalum powder and mixed ceramic powder are added into a copper paste formula, an appropriate dispersing agent is selected, and the surface of copper powder is coated with oleic acid, so that oxidation of the copper paste can be effectively prevented before the copper paste is formed, the copper powder is better dispersed in the subsequent processing process, and copper electron migration can be effectively prevented during sintering due to addition of the tantalum powder. And the mixed ceramic powder is added to effectively inhibit the shrinkage of the copper electrode, so that the continuity of the copper layer is good.
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Description

technical field

[0001] The present invention relates to the technical field of conductive paste, in particular to a kind of copper internal electrode conductive paste for multilayer ceramic capacitors and its application. Background technique

[0002] Multilayer ceramic capacitors (Multilayer Ceramic Capacitor, MLCC) is the most widely used type of chip components, with the characteristics of small size, high specific capacitance, and high precision, effectively reducing the size of electronic information terminal products (especially portable products) Volume and weight, improve product reliability.

[0003] At present, the internal electrode pastes used in the production of multilayer ceramic capacitors mainly include silver paste, silver-palladium paste, and copper paste. Due to the problems of easy oxidation, fast shrinkage and electron migration of copper paste itself, its large-scale use is limited. If the above problems can be solved, copper paste will be more widely...

Claims

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