Electrical inspection is an important step in ensuring the performance and quality of PCBA boards.
I. Significance of Electrical Inspection
Electrical testing plays a vital role in PCBA processing. Its main purpose is to detect whether the electrical performance of the PCBA board meets the design requirements after the completion of the assembly, and to investigate potential defects and failures, so as to ensure the ultimate reliability and stability of the product. Electrical testing can effectively reduce the failure rate, improve product quality and enhance market competitiveness.
II. Common electrical testing methods
1. Flying probe test
Flying probe test is a non-contact test method, through the flying probe tester to detect PCB board conductivity, short circuit and other electrical properties. The advantage is that it is suitable for small batch production and complex circuit design, high test flexibility.
2. Function test
Function test is to simulate the PCBA board in the actual operating conditions of the operating state, measuring its functional performance such as signal transmission and data processing. Through the input signal or power supply, detect the parameters of the board to ensure its normal operation in a complex environment.
3. Burn-in test
Burn-in test is applicable to PCBA boards that require pre-written firmware. By writing the firmware into the chip, to verify the correctness of the program operation. This test can detect firmware-related problems in advance, avoiding failure due to software defects after the product is put into the market.
III. Key technologies and equipment
1. Automatic test equipment (ATE)
Automatic test equipment (ATE) through the integration of a variety of test methods to achieve comprehensive automated testing of PCBA boards, ATE can complete high-speed, accurate testing of complex electrical properties, improve testing efficiency and accuracy.
2. Image inspection equipment
Image inspection equipment through a high-resolution camera, the PCBA board appearance inspection, check the solder joints, lines, component location and other cosmetic defects. Image inspection is usually carried out before electrical performance testing to ensure physical and visual integrity.
IV. Common problems in electrical inspection
1. Flaw soldering and cold soldering
False soldering and cold soldering are common problems in PCBA electrical inspection. They can lead to poor circuit contact and affect the normal operation of the product. These defects can be quickly identified through flying probe testing and functional testing.
2. Short and open circuit
Short and open circuit problems can seriously affect the electrical performance of the PCBA board, and even lead to equipment damage. Flying probe test and ATE can effectively find and correct these electrical connection problems.
3. Parameter deviation
Parameter deviation refers to the difference between the actual measured value and the design value. This is usually caused by component quality or installation process. Through functional testing and burn-in testing, electrical parameters can be tuned and verified to ensure compliance with specifications.
V. Strategies for Optimizing Electrical Inspection
In order to improve the efficiency and effectiveness of the electrical inspection of PCBA processing, the following strategies can be used:
1. The introduction of automated systems
The use of automated test equipment to improve testing efficiency and reduce human error. The automated system is capable of autonomous testing and data recording, which helps to quickly locate and repair problems.
2. Strengthen quality control
Strengthen quality control in all aspects of PCBA processing to reduce the occurrence of defects. By optimizing the welding process, assembly process and component selection, improve the overall processing quality.
3. Training professionals
Through regular training to improve the technical level and testing capabilities of testers. The technical quality of professionals directly affects the accuracy and efficiency of testing.
Quick facts about NeoDen
1. Established in 2010, 200+ employees, 8000+ Sq.m. factory.
2. NeoDen products: Smart series PNP machine, NeoDen10, NeoDen9, NeoDen K1830, NeoDen4, NeoDen3V, NeoDen7, NeoDen6, TM220A, TM240A, TM245P, reflow oven IN6, IN12, Solder paste printer FP2636, PM3040.
3. Successful 10000+ customers across the globe.
4. 30+ Global Agents covered in Asia, Europe, America, Oceania and Africa.
5. R&D Center: 3 R&D departments with 25+ professional R&D engineers.
6. Listed with CE and got 50+ patents.
7. 30+ quality control and technical support engineers, 15+ senior international sales, timely customer responding within 8 hours, professional solutions providing within 24 hours.
Post time: Jul-19-2024