PCBA Tech - PCBA coating design and performance characteristics

PCBA is a control process. The coating of the PCBA board can protect the circuit board. The advantages of the coating are high corrosion resistance and low friction coefficient. The characteristic of PCBA is that after APP control, remote control, intelligent timing, scene setting and other operations can be carried out, and it can be switched on and off anytime and anywhere. Let's learn more about "PCBA coating design and performance characteristics" below.

With the continuous development of electronic technology and people continue to pursue more convenient enjoyment, mobile phones are constantly innovating to provide people with novel services. However, some seemingly basic technologies, such as battery life, enclosure protection, etc. For example, the water resistance of mobile phones, this feature often only appears on some specific models. So people want to crack, develop, modify, etc. to change this situation.

1. PCBA board coating innovation

The coating protection of the PCBA board is not only dripping and splashing, but also the ability to protect from immersion, allowing consumers and industries to use electronic devices wherever they are worn. It has the following advantages:

1. Free pinhole and conformal coating;

2. Hydrophobic performance;

3. Highly resistant to corrosion;

4. Good compatibility with objects;

5. Improve the ability of various materials;

6. Including metal, plastic, rubber, etc.;

7. Effective barrier against moisture, acid and more;

8. Completely homogeneous surface;

9. Low friction coefficient;

10. Equivalent to IPX7 water protection performance.

2. Comparison of advantages and disadvantages of several nano waterproof coatings

The current nano waterproof and anticorrosive materials for electronic products on the market are roughly divided into the following three types:

01. Vacuum spray type waterproof coating for coating machine

This technology uses a vacuum coating machine to spray the waterproofing agent into the product from the gaps in the appearance of the product under vacuum conditions in the form of a spray. The purpose is to allow the waterproofing agent to contact the circuit part more widely, but due to the variety of products The appearance and structure are different, and the sealing performance is also inconsistent. Therefore, the coating formed by the water repellent inside the product is often incomplete after spraying.

advantage

Multiple devices can operate at the same time to speed up efficiency.

shortcoming

It is necessary to purchase a certain amount of equipment, and the equipment is also uneven, which is largely restricted by the performance of the equipment, and the spray coverage of the PCBA product is not complete, and the yield rate is not guaranteed.

02. Surface spray nano waterproof coating

In the form of surface spray, a nano-film is formed on the surface of the mobile phone or tablet computer, thereby preventing the entry of moisture from the outside and achieving a waterproof effect.

advantage

easy to use

shortcoming

The anti-wear ability is weak. After all, the coating is on the shell part of the product. The shell is the part where various items are in close contact. In the face of too many complicated use environments, the damage rate will be greatly accelerated, and the appearance of the product during use The risk of deformation, once deformed, the influence of moisture on the internal circuit board cannot be guaranteed.

03, PCBA immersion nano waterproofing agent

According to Coating Online, this technology is currently a trending approach. The most important thing is that the quality of the nano-liquid used must pass the test, and it can meet the product quality requirements of the international market. This technology is simple to operate. No need to increase equipment investment.

advantage

Simple operation, no need to increase equipment investment, no need for vacuum environment, uniform coating, only need to soak PCBA in nano waterproof liquid for a few seconds, after coating, it will not affect the electrical conductivity of the connector, and it can resist acid, alkali and salt. Corrosion, because it is directly coated on the PCB board, the deformation and damage of the product appearance will not have a significant impact on the PCB. Because it is based on PCBA dip coating, it is suitable for almost all electronic products.

shortcoming

At present, it is not possible to achieve waterproof level 6 or higher by PCB nano coating alone, and it is only suitable for life waterproofing.

Recommendation: The choice of nano waterproofing liquid is very important. There is a big price gap between the various nano waterproof coatings on the market, and of course the performance gap is also large. This requires our manufacturers to test more products of the same type, compare performance, and finally choose excellent quality Of nano coatings.

[PCBA performance characteristics and use]

1. APP development remote control: After connecting to WIFI, the mobile phone APP can be used to remotely control the power supply, switch the device anytime and anywhere, so that ordinary household appliances can become smart;

2. APP development smart timing: APP interactive interface is simple and easy to operate, user-friendly timing switch function, one-key setting of electrical time for household appliances, and multiple timing tasks can be set;

3. APP development power statistics: every kilowatt of electricity consumed by home appliances, smart sockets can be accurately measured in real time, and mobile phones can monitor the operating status of the equipment at any time;

4. APP development electricity consumption record: The mobile phone APP can also understand the historical electricity consumption of the device, record electricity consumption habits, and allow users to better plan electricity consumption behavior;

5. APP development scene setting: through the mobile phone APP, and other smart home products interconnection, users can DIY various wonderful scenes through product matching.