Conducting particle and preparation method thereof

Abstract

A conducting particle comprises a center insulation particle, conductive microparicles, a nickel layer, a metal coating layer, first insulation particles and second insulation particles. The center insulation particle is made of an organic insulation material. The conductive microparicles are dispersed in the center insulation particle. The center insulation particle is covered with the nickel layer. The nickel layer is covered with the metal coating layer. The first insulation particles are dispersed in the metal coating layer and cover the nickel layer. The second insulation particles are dispersed in the periphery of the metal coating layer. The conducting particle has good conductivity and insulation reliability, and after the conducting particle is used for a period of time, the insulation resistance of all conducting particles is not reduced, and good conductivity is still kept. The conductivity of the conducting particle is not obviously reduced after a moisture absorption experiment.

Description

technical field [0001] The invention relates to the field of electricity, in particular to a conductive particle and a preparation method thereof. Background technique [0002] The conductive particles can be mixed with a binder resin, and used as a so-called circuit connection material for connecting circuit electrodes in electronic products such as semiconductor elements and liquid crystal displays. [0003] In recent years, with the high-definition liquid crystal display, the protrusions of the circuit electrodes of the IC driving the liquid crystal have been narrowed in pitch and narrowed in area, so the following problems have arisen. Particles flow out between adjacent circuit electrodes, causing a short circuit. [0004] In addition, if the conductive particles flow out between the adjacent circuit electrodes, there will be a problem that the conductive particles in the anisotropic conductive adhesive supplemented between the bump and the glass panel will decrease, a...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the high-definition liquid crystal display, the protrusions of the circuit electrodes of the IC driving the liquid crystal have been narrowed in pitch and narrowed in area, so the following problems have arisen. Particles flow out between adjacent circuit electrodes, causing a short circuit

[0004] In addition, if the conductive particles flow out between the adjacent circuit electrodes, there will be a problem that the conductive particles in the anisotropic conductive adhesive supplemented between the bump and the glass panel will decrease, and the gap between the opposing circuit electrodes will be reduced. The contact resistance increases, causing poor contact

[0005] At the same time, in recent years, although there are technologies to improve the conductivity and reduce the short-circuited conductive particles, after a period of use, the insulation reliability has declined to a large extent.

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