A double-sided gold spraying device for thin film capacitor core

By using a spraying and blowing design for double-sided gold coating on thin-film capacitor cores, the welding problems caused by zinc-tin alloy dross and oxidation impurities were solved, resulting in a low-resistance, high-adhesion gold coating that improves the welding reliability and high-current carrying capacity of the capacitor.

CN122136190APending Publication Date: 2026-06-02SHENZHEN HOVERBIRD ELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN HOVERBIRD ELECTRONICS TECH CO LTD
Filing Date
2026-04-10
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing gold spraying equipment results in zinc-tin alloy dross and oxide impurities after spraying, which reduces the weld bond strength and conductivity stability, affecting the reliability of capacitors.

Method used

A double-sided gold-plating device for thin-film capacitor cores is used to simultaneously spray zinc-tin alloy layers and remove dross through spray pipes and air jets on the spray support block, forming external lead electrodes with low resistance and high adhesion, and ensuring the density of the gold-plated layer.

Benefits of technology

It achieves uniform current output, reduces contact resistance, improves high current carrying capacity, ensures the strength and reliability of welding, avoids delamination and overheating of capacitors under high frequency and high current conditions, and meets the requirements for long-term reliable use.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a double-sided gold spraying device for thin-film capacitor cores, belonging to the field of capacitor core gold spraying. The device includes two support plates forming a conveying channel, a fixed plate fixed to the outer wall of the support plates, a carrier plate capable of reciprocating up and down on the fixed plate, and a spraying support block slidably mounted on the carrier plate; a spraying pipe mounted on the spraying support block, with a material conveying pipe attached to the spraying pipe; an air jet pipe mounted on the spraying support block; and a spraying disc connected to the spraying pipe and the air jet pipe. This invention can quickly blow away and remove loose, unbonded metal dross and oxide impurities adhering to the end face of the thin-film capacitor core after gold spraying, leaving a dense and uniform gold layer on the end face. This avoids dross obstructing solder wetting and contact, thereby ensuring the firmness and reliability of subsequent soldering.
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