PCB is an important electronic device, the support of electronic components, the carrier of electrical connection of electronic components, and the upstream foundation of the electronics industry, which determines the competitiveness of electronic products. At present, the global PCB industry accounts for over a quarter of the total output value of the electronic component industry, making it the industry with the largest proportion among various electronic component sub sectors
Detection method 1. Manual visual inspection is the most traditional detection method, which mainly uses a magnifying glass or microscope to observe the details of the board and subjectively judge defects. The most obvious drawback of manual visual inspection is its low efficiency, but the worst limitation is the subjectivity of defect judgment. Even with manual training, it is difficult to unify standards for determining defects during execution 2. Dimensional inspection mainly uses a two-dimensional image detector for detection, achieving automatic measurement and improving measurement efficiency and accuracy
3. Online testing Online testing uses electrical performance testing, resulting in lower testing costs for single boards. The disadvantage is that it requires the production of fixtures and programming debugging
4. Functional system testing Functional system testing is an early automated testing method that involves comprehensive testing of circuit board functional modules using specialized testing equipment in the middle and end stages of the production line. The disadvantage is that writing test programs is very complex and not commonly used on most production lines
5. Laser detection Laser detection is the latest development in PCB detection, and bare board practice has verified its feasibility. The disadvantage is that the cost is too high, and there is a certain threshold for maintenance and use 6. X-RAY detection mainly uses the differences in X-ray absorption rates of different substances to find defects, mainly used for ultra-fine spacing and ultra-high density circuit board detection 7. Optical detection Optical detection is currently the most commonly used detection method for appearance inspection, and is generally used before and after reflow and before electrical testing, which can effectively improve the repair efficiency of functional defects. Optical testing can detect and repair most defective circuit boards before conducting electrical testing, which greatly saves the cost of correction
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China