Diode chip pickling equipment

Abstract

The invention discloses pickling equipment for diode chips, which comprises a working chamber, a pickling box, a pickling plate, a temperature control device, a spray head and a controller. The pickling tank and the pickling tray are distributed in the working chamber, the temperature control device includes a cooling and heating coil, a compressor external unit and a temperature sensor, and the cooling and heating coil is installed in the acid It is inside the washing box and is connected with the compressor external machine arranged outside the working chamber, and the temperature sensor is arranged in the pickling box. The spray head is arranged on one side of the pickling tray and connected to the pickling tank through a connecting pipe, and a solenoid valve is arranged on the connecting pipe. The controller is installed on the working chamber and is electrically connected with the temperature control device and the solenoid valve for control. Through the setting of the temperature control device, the present invention can monitor the temperature, cool and heat the pickling box in real time, keep the temperature of the acid in the pickling box constant, and ensure the pickling quality of the diode chip.

Description

technical field [0001] The invention relates to the technical field of diode production, in particular to pickling equipment for diode chips. 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 alignment - chip screening - chip loading - welding - pickling - gluing - baking - plastic sealing - post curing - electroplating - printing test - external inspection - Package. However, when pickling, the concentration and temperature of the acid need to be constant. The conventional method is to transport the acid of a certain concentration and temperature int...

AI Technical Summary

Problems solved by technology

However, when pickling, the concentration and temperature of the acid need to be constant. The conventional method is to transport the acid of a certain concentration and temperature into the pickling box, and spray pickling by connecting the nozzles on the pickling box. The outer surface is provided with an insulating interlayer, and the interlayer is provided with insulating water to insulate the acid in the pickling tank. However, the effect of the above thermal insulation method is not good, and the acid has a corrosive effect on the pickling tank, which is easy to cause The heat preservation water in the interlayer enters the pickling box, resulting in the dilution of the acid concentration. Therefore, due to the dilution of the acid concentration and the unstable temperature, the pickling of the diode cannot meet the requirements.

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