PCB-PTH (Printed Circuit Board-Plated Through Hole) line hole conditioning and activation ultrasonic device and method

Abstract

The invention discloses a PCB-PTH (Printed Circuit Board-Plated Through Hole) line hole conditioning and activation ultrasonic device and method. The device comprises a hole conditioning or activation solution tank, an ultrasonic generator, a wire and an ultrasonic host, wherein the ultrasonic generator is mounted in the activation solution tank, and the ultrasonic generator is connected with the ultrasonic host via the wire. The PCB-PTH line hole conditioning and activation flow comprises the steps of charging, bulking, recovery, double water washing, glue residue removal, recovery, high neutralization water washing, high double water washing, neutralization, double water washing, hole conditioning, hot water washing, double water washing, microetching, double water washing and the like. According to the invention, ultrasonic energy with the capabilities of compression and expansion can effectively penetrate through fine gaps and small holes due to inertial thrust of liquid, and liquidity of solution in the holes is improved; the difference between colloid particle numbers on a liquid level and at the bottom of the tank can be reduced; palladium colloid molecular dispersion is good; the uniformity of activation of points of a plated board in the tank is improved; the ultrasonic energy generates a micro-stirring force and a temperature difference driving potential which contribute to improving Brownian movement of colloids; and adhesion of hole walls is increased.

Description

technical field [0001] The invention belongs to the field of circuit board printing, and in particular relates to a PCB-PTH line hole-setting and activating ultrasonic device and method. Background technique [0002] The traditional PTH line hole and the flow of liquid medicine in the activation tank mainly rely on the up and down vibration and left and right swing of the PCB hanger. This production method has the following disadvantages: 1. The ability of the liquid to penetrate the small hole and the cleaning ability of the fine seam are relatively low. Poor, it is easy to cause poor adhesion of the palladium colloid in some places; 2. The activator is easy to make the colloid aggregate into a large colloid, resulting in uneven distribution of the palladium colloid in the medicine tank. 3. Adsorption in a static equilibrium state must use a higher concentration of tin-palladium colloid to increase the probability of collision. Contents of the invention [0003] The purp...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a PCB-PTH wire hole-making and activation ultrasonic device and method, aiming at solving the problem that the traditional PTH wire hole-making and activation tank liquid medicine flow mainly depends on the up and down vibration and left-right swing of the PCB hanger, which is easy to cause palladium The colloid is poorly attached in some places, and the distribution of palladium colloid in the medicine tank is uneven, so a higher concentration of tin-palladium colloid is required

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