Basic requirements and quality judgment of electronic component welding

Date：2022-08-24 18:30:51Views：1005

Welding is an important process in the assembly process of electronic components, and even the quality of welding directly affects the working performance of electronic components. And a bad solder joint will affect the reliability of the whole product. In order to help you understand deeply, this paper will summarize the basic requirements of electronic component welding and the relevant knowledge of quality inspection. If you are interested in what this article is about to cover, read on.

Quality requirements for welding joints

How to ensure the working performance of electronic components, the good conductivity of solder joints is an essential factor. The key lies in the mutual diffusion and infiltration of the atoms between the solder and the metal surface of the welded part to form an alloy completely. If the two are simply stacked and mixed, there will be false welding and false welding. So that the solder joint is not conductive.

In addition, the solder joint should have a certain mechanical strength. We can increase the area of the solder pad or use the bending of the electronic component solder foot is also an effective measure to increase the mechanical strength. In addition, the surface is bright and smooth, without gaps and burrs, which is also one of the criteria for measuring whether the welding joints meet the requirements.

Suitable welding temperature

Temperature is an essential condition for welding, so that the temperature can rise to a suitable range, so that the component pins and pads can generate metal alloys.

Precautions for testing the welding quality of electronic components

1. Inspection of solder joint quality: when inspecting the solder joints of SMD components, check whether the moisture of the solder joints is good, whether the solder is spread evenly and continuously on the surface of the solder joints, and the connection angle shall not be greater than the height of the solder joints of 9000 SMD components. The maximum limit is to exceed the solder pad or press it to the top of the solderable end of the metal coating, but not to contact the components themselves.

When inspecting the welding quality of the SMD components, if the solder of the pin extends to the bending of the component pin during the SMD processing, but does not affect the normal operation of the SMD components, it can also be considered as a normal welding operation.

2. Inspection of solder joint position when inspecting the pin welding part of SMT components, it is necessary to focus on whether the pin of the component in SMT chip is consistent with the pad. If the pin welding part of the component is separated from the pad, but there is a certain area of overlap, the welding position of the SMT component can still pass.

The above is the basic requirements and quality judgment of electronic component welding compiled by Chuangxin testing group. I hope it can help you. Our company has professional engineers and industry elite teams, and has three standardized laboratories with an area of more than 1800 square meters. It can undertake various test projects such as electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, functional testing, factory incoming material inspection and tape weaving.