Preparation method of resistivity self-adapting regulated conductive copper paste

Abstract

This invention discloses a method for preparing conductive copper paste with adaptive resistivity control, relating to the field of electronic conductive materials technology. The invention involves in-situ polydopamine coating of copper powder in a multi-level pH gradient buffer system to prepare an antioxidant copper powder premix; simultaneously, it synthesizes thermally responsive conductive microspheres with a core-shell structure; subsequently, the two are compounded and dispersed with an organic carrier to obtain an uncured slurry; microscopic characteristic data of the slurry are collected, and the initial curing process is intelligently predicted using a deep belief network with an attention mechanism and an improved sparrow search algorithm; closed-loop correction is performed through micro-trial and error and an improved particle swarm optimization algorithm to finally determine the optimal curing parameters for curing the main slurry. This invention not only solves the problem of easy oxidation of copper paste but also achieves accurate and adaptive control of the resistivity of a single-formulation slurry, improving batch deviation control rate and product consistency and reliability.

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