What Kind of Pcba Board is Good?

To ensure the high quality and reliability of assembled PCBs, PCB manufacturers and assemblers must inspect boards at different stages of the manufacturing and assembly process to eliminate surface defects. In addition, timely and professional inspection can lead to defects exposed prior to electrical testing and facilitate the accumulation of data for statistical process control (SPC).

First, in order to improve the conformity rate of the product

With the improvement of product qualification rate, the product passing rate will be greatly improved. PCBA inspection is a part of the whole production process of PCBA processing, which is an important means to control product quality.

Second, in order to get a better user experience

If the conditions allow, every product needs basic tests, such as ICT, FCT, some tests, such as fatigue test, stress test under harsh environment, aging test, can only test a sample of products, our heart will have a bottom. Only products that can withstand the test will be loved by users. If problems are found in the testing process, we can also correct and adjust in time to make the whole product more complete and avoid serious consequences after the product is launched.

Third, the PCBA circuit board inspection conditions

1. In order to prevent parts from being contaminated, you must choose EOS/ESD fully protective gloves or fingertips and wear static rings. The light source is white or fluorescent light. Light intensity must be higher than 100 lux and can be clearly analyzed and visible within 10 seconds.

2. Inspection method: Place the product about 40 cm from the eyes, about 45 degrees up and down, and inspect visually or with a triple magnifying glass.

3. Inspection standard: (according to QS9000 level, sampling = 0, AQL = 0.4%; special customer requirements, determined by customer acceptance standards)

4. Sampling program: secondary standard single sampling

5. Judgment test standard: serious defects (CR) AQL 0%

6. Major Defect (MA) AQL 0.4%

7. A minor defect (MI) AQL 0.65%

Fourth, PCBA board inspection standards

1、Serious defects (expressed as CR): any defects sufficient to cause injury or endanger life safety to people or machines, for example: non-compliance with safety regulations/machine burnout/electric shock.

2、Major flaws (indicated by MA): flaws that may cause damage to the product, abnormal function or affect the service life of the product due to the material.

3、Minor shortcomings (expressed as MI): not affecting the function and service life of the product, defective appearance, slight defects or differences in the mechanism assembly.

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