Diode pickling machine

Abstract

The invention discloses a diode pickling machine in the diode manufacturing field, and the diode pickling machine comprises a pickling trough, a base and a pickling tank. The pickling trough is located at the upper end of the base, one side, where the pickling trough locates, of the base is provided with a vertical support, the pickling tank is fixed to one side, close to the pickling trough, of the support, the pickling tank is located above the pickling trough, and the bottom of the pickling trough is provided with a liquid supply pipe. The top of support is provided with a flow collecting cover, the top end of the flow collecting cover is provided with a drawing fan, and an exhaust pipe is connected to the drawing fan. The flow collecting cover locates above the pickling trough, the outer side wall at the lower end of the flow collecting cover is hinged with a rotary shaft, and transparent isolation cloth is fixed to the rotary shaft. Through arrangement of the flow collecting cover, the drawing fan, the isolation cloth and the like, acid mist volatilized in the diode pickling process is isolated and detached, the acid mist diffusing in a processing place is prevented from causing damage on a human body and pollutions on environment, the diode pickling machine is relatively environmental-friendly, and pickling environment of diodes is relatively healthy.

Description

technical field [0001] The invention relates to the field of diode manufacturing, in particular to a diode pickling machine. Background technique [0002] A diode is an electronic component, a device with two electrodes that only allows current to flow in one direction. The most common function of a diode is to only allow current to pass in a single direction (called forward bias), and to block it when it is reversed (called reverse bias). So a diode can be thought of as the electronic version of a check valve. [0003] In the existing production process of axial diodes, the process flow is: lead wire arrangement—chip screening—chip loading—welding—pickling—gluing—baking—plastic sealing—post curing— --Electroplating---Printing test--External inspection--Packaging. The existing diode surface pickling device generally includes a pickling plate and a pickling tank. The pickling plate is arranged on the pickling tank, and the pickling plate is provided with an acid leakage ho...

AI Technical Summary

Problems solved by technology

During the pickling process, chemical reagents such as mixed acid and hydrogen peroxide should be used to treat the surface of the diode. The mixed acid is usually mixed with nitric acid, sulfuric acid, hydrofluoric acid and acetic acid in a certain proportion. There will be a certain amount of acid during the pickling process. The acid solution volatilizes into the air. This type of acid solution has a high concentration and is highly corrosive. It will cause greater harm to the human body after volatilization in the air or contact with the human body, and greater pollution to the environment.

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