PCB Tech - PCBA selection items and related anti-static methods

With the continuous development of science and technology, PCBA has gradually become known to people. It is an important electronic component, a support for electronic components, and a provider of electronic component circuit connections. It is very common in current cities. What else do you do not know about the role? Let's take a closer look at "PCBA selection items and related anti-static methods".

[Key Points of PCBA Selection]

PCBA is the core of electronic products, just like the position of the Chinese army in the battle of the three armies. Product reliability, ease of use and stability are closely related to PCBA quality. Therefore, in the process of purchasing PCBA, we need to pay attention to PCBA quality control points urgently, and use a professional eye to examine whether each PCBA board meets the application requirements of electronic products.

1. The reliability of PCBA components welding

The reliability of the soldering of PCB circuit boards and components directly determines the performance of electronic products during use. With the in-depth use of products, the circuit boards suffer from oxidation, heat radiation, drop, and overload use, which will cause them to leave the factory. OK's PCBA board began to show welding problems, and the product failed.

In addition, in PCBA processing, whether to use brand original components is also very important to the quality of electronic products. Many second-hand or counterfeit components will explode in failure during long-term use. The same is true for PCB circuit boards. According to the application environment of the product, to prevent the deformation of the PCB and the influence of heat, these factors need to be taken into account when purchasing the PCBA and undergo rigorous testing.

2. PCBA aging test performance report

In large quantities, strict aging tests are required. Test the stability and reliability of the PCBA board under extremely strict conditions of use. In order to save costs, many companies omit this step. As a result, batch products are defective in the hands of customers, causing greater losses. Therefore, when purchasing PCBA, it is recommended to put forward aging test requirements for batch products, configure aging test fixtures and require suppliers to provide aging test performance reports.

3. PCBA assembly process management

The assembly process of PCBA board, housing, and packaging is also more important. Improper operation of many assembly processes can also cause damage to the soldered components on the PCBA board that is tested OK, and cause defects after assembly. The PCBA supplier's assembly process needs to have strict operating instructions and supervise the workers to complete them in accordance with the procedures.

4. Cleanliness of PCBA board surface

The cleanliness of the PCBA board surface is very important. If a lot of hand-soldering tin slag, flux, etc. remain on the PCBA surface, it will cause unpredictable risks in the use of electronic products in the future. Therefore, PCBA manufacturers must be required to perform professional ultrasonic cleaning on all batches of PCBA panels and prevent fingers from contaminating the panels.

5. Purchasing after-sales service capabilities of PCBA suppliers

When purchasing PCBA, evaluation of the supplier's after-sales service capability is also very important. A wise man must make a mistake when he thinks about it. With the deepening of mass manufacturing, undesirable phenomena will definitely occur. At this time, the ability of PCBA manufacturers to respond quickly and cooperate in a timely manner is particularly important.

6. Give manufacturers a little more profit when purchasing PCBA

With the increasing development of the circuit board and PCBA processing industries, the price of PCBA is extremely transparent. As long as a little comparison or calculation, the possibility of being slaughtered can be avoided. Profit is the driving force for a company to serve customers. Only with profit can there be service and standard quality control. In view of this, in the process of purchasing PCBA, it is necessary to abandon the thought of always bargaining prices and give PCBA manufacturers appropriate profits, which will help the perfect manufacturing of their own products and realize self-interest.

[Anti-static skills during PCBA processing]

When processing PCBA, processing personnel will strictly follow the bill of materials, PCB silk screen and outsourcing processing requirements to insert or mount components, but electronic components often generate more or less static electricity without paying attention. These static electricity will emit electromagnetic pulses during discharge, which will cause errors in computer calculations. In severe cases, they will also cause damage to devices and circuits. Only by taking anti-static measures can you protect machines and components. PCBA processing should be How to prevent static electricity?

The anti-static precautions are as follows:

1. All personnel who come into contact with components and products wear anti-static clothes, anti-static bracelets, and anti-static shoes.

2. The anti-static system must have a reliable grounding device. The anti-static ground wire must not be connected to the power neutral wire or shared with the lightning protection ground wire.

3. All components are treated as electrostatic sensitive devices.

4. During the operation, use an anti-static work surface, and use anti-static containers for the components and semi-finished products.

5. The welding equipment is grounded reliably, and the electric soldering iron is of anti-static type, which must be tested before use.

6. Warehouse management personnel should wear anti-static gloves when sending materials and IQC testing, use the meter to be grounded reliably, and the work surface is covered with anti-static rubber pads.

7. Periodically inspect the above-mentioned anti-static tools, settings and materials to confirm that they are in the required conditions.