Manufacturing method of shaft-type diode

Abstract

The invention discloses a manufacturing method of a shaft-type diode, which comprises the steps of 1, wafer cutting, 2, welding and assembling, 3, high-temperature welding, 4, plastic packaging and molding, 5, lead-free electroplating, 6, electrical property testing and braiding, 7, laser printing and 8, packaging. Due to the adoption of the laser printing mode for printing, the original 5H boiling required to be performed before lead-free electroplating is avoided. Meanwhile, it is unnecessary to purchase consumables such as ink and printing matrixes for ink printing any longer, thereby beingcapable of reducing the product cost. The manufacturing method improves the product appearance qualification rate and the product appearance quality level. The product appearance production qualification rate is improved by 1% or above, the product cost is reduced, the product appearance quality is greatly improved, and thus the product quality is improved.

Description

technical field [0001] The invention relates to a manufacturing method of an axial diode, which belongs to the technical field of electronic components. Background technique [0002] Diode, also known as crystal diode, referred to as diode (diode); it is an electronic device with unidirectional conduction current. There is a PN junction and two lead terminals inside the semiconductor diode. This electronic device has unidirectional current conductivity according to the direction of the applied voltage. Axial diode is a form of diode. It has a cylindrical body and round wires protruding from both ends. The diode chip is packaged inside the body. Its functions include rectification, voltage stabilization, voltage suppression, and light-emitting diodes. [0003] There are existing axial diode manufacturing methods, usually using the following process methods: [0004] Wafer cutting→welding assembly→high temperature welding→plastic sealing and molding→boiling for 5H→lead-free ...

AI Technical Summary

Problems solved by technology

[0005] This production process uses ink printing to print on the material body, but because the material body is epoxy resin molding glue, which contains wax, it needs to be boiled for 5 hours before lead-free electroplating to remove the wax contained in the body in order to print the ink. The printing is printed on the material body, and the 5-hour cooking operation not only increases the production process, but also the material body is easy to be boiled and discolored or the wax is not boiled, which will cause the printed ink characters to fall off easily during subsequent ink printing, resulting in a low appearance pass rate and customer failure. Appearance and printing complaints and other issues; at the same time, consumables such as ink printing inks and printing models also need to be purchased regularly, which increases product costs