PCBA coated area attentions

Currently there is no specific provisions for the PCBA coated area in the industry, and each customer's requirements are not necessarily the same.

Requirements for most products as follows

PCBA coated areacan not be:

1. The need for regional electrical connections, such as the gold pad, Goldfinger, metal vias, test holes and the like;

2. The batteries and battery holder;

3. The connector;

4. The fuse and housing;

5. The cooling device;

6. Jumper;

7. The lens of the optical device;

8. potentiometer;

9. The sensor;

10. No sealed switch;

11. The other regions will be affected by the coating performance or operation.

The area to be coated （PCBA coated area）:

In addition to the above-mentioned area, all other open solder joints, leg, conductor some components should be coated.

Three anti-paint sprayer machine helps a lot for PCBA coated area painting. The machine greatly improved the quality of the three anti-paint spraying and spraying efficiency for the enterprise to solve the recruitment difficulties (difficult to recruit professionals), and quality issue s. There is an operation manual is strongly recommended. Use sprayer is to bring a lot of convenience. But there are some problems that need attention:

1, spraying environmental requirements: All spraying operations should not be below 16 ℃and relative humidity less than 30% of the conditions. If the temperature is too low it can be heated in an oven at 40 degrees 30 minutes after the spraying, optimum temperature 30 C. High humidity is also using the same method and the same conditions heating.

2, PCB board requirements: to be sprayed PCB board subject to testing, testing, debugging qualified, and thoroughly carried out (solder, rosin, dust, oil, flux and residue) after the cleaning process clean. Do not allow spraying device, to provide a fast-drying and easy peel masking tape, protection-related components (these components include connectors, IC sockets, adjustable potentiometers, high power radiators, test point, the connection point) Cycling clothes.

3, workers protection requirements: workers should wear splash goggles and isolating gloves and wear protective masks.

4, PCB board coating area must be flat, use jigs and other tools, the spout from the target 20--30cm uniform coating, the coating is thin and uniform. Spray the surface to ensure complete coverage of the three anti-paint, spray can face and eyes in a plane to see whether complete spraying.

5, after the first pass three paint is completely dry (1 hour) for the second spraying, spraying refer to step 4.2.

It is very Important that this is not only the PCBA coating area quality assurance, but also a secure protection for the operator.

For more informations about PCBA