PCBA manufacturers refer to enterprises specialized in circuit board assembly and component installation. In the process of PCBA processing, the detection of circuit board components is a very important link, which is directly related to the quality and stability of the entire product. This article will explain in detail the testing skills of circuit board components to help PCBA manufacturers improve product quality.
1、 Appearance inspection
Appearance inspection is the first step of circuit board component inspection, which is mainly to observe whether the appearance of components is complete, free of damage, oxidation, etc. Common appearance problems include component corrosion, solder joint oxidation, pin bending, back solder joint, etc. Magnifier or microscope shall be used for appearance inspection to ensure the accuracy of inspection.
2、 Dimensional inspection
Dimension inspection is to check whether the dimensions of components meet the requirements, mainly through measurement ADM3202ARNZ-REEL7 The length, width, height and other dimension parameters of components. Dimension inspection can be carried out with micrometer, vernier caliper and other tools, and the measurement accuracy is required to be high to avoid errors.
3、 Welding spot inspection
Solder joint inspection is to check whether the welding between components and circuit board is firm and correct. The quality of solder joints directly affects the reliability and stability of circuit boards. Welding spot inspection mainly includes whether the welding is complete, whether the position of welding spot is correct, and whether the welding is even. The inspection of solder joints can be carried out with a microscope and other tools. For small size solder joints, a microscope or a magnifying glass can be used for observation.
4、 Electrical performance test
Electrical performance testing is to detect the working condition of components in the circuit, mainly including the measurement of voltage, current, power and other parameters. Electrical performance test can be carried out with multimeter, oscilloscope and other instruments. For complex circuit boards, professional test equipment can be used for comprehensive electrical performance testing.
5、 Environmental adaptability test
Environmental adaptability test is to detect the working conditions of components under different environmental conditions, mainly including the test of temperature, humidity, vibration, impact and other parameters. The environmental adaptability test can be carried out with temperature and humidity test chamber, vibration test bench and other equipment.
6、 Reliability test
Reliability test is to detect the stability and reliability of components in long-term operation. Reliability test mainly includes life test, high temperature aging test, low temperature aging test, etc. The reliability test can be carried out with professional test equipment.
7、 X-ray testing
X-ray testing is a non-contact testing method, which can detect the internal structure and welding of components, and can detect hidden solder joints and welding defects. X-ray testing can be carried out using professional X-ray testing equipment.
summary
The detection of circuit board components is a very important link in the process of PCBA processing, which is directly related to the quality and stability of products. When testing components, attention should be paid to appearance inspection, dimension inspection, solder joint inspection, electrical performance inspection, environmental adaptability inspection, reliability test and X-ray inspection. The quality and stability of circuit board components can be effectively improved by reasonable use of various testing tools and equipment.
