什么是共形涂料
保形涂料是一种聚合物保护膜，涂在 PCB 组件上可防止其受到化学损害和环境因素的影响。使用保形涂料可以在电路板和潜在污染物之间形成一道屏障，从而提高 PCBA 的可靠性和使用寿命。
The main benefit of applying a conformal coat is moisture protection. Moisture can lead to issues such as short circuits, corrosion, and degradation of electrical performance. By applying a conformal coat, the PCBA is shielded from moisture, reducing the risk of these problems.
Conformal coatings also serve to protect the PCBA from exposure to corrosive substances. These substances can be present in the environment or may come into contact with the PCBA during its operation. The conformal coat acts as a barrier, preventing the corrosive substances from reaching the sensitive components of the PCBA and causing damage.
Additionally, conformal coatings modify the dielectric strength in the layer surrounding the board, providing protection against electrostatic discharge (ESD). ESD can occur when there is a sudden flow of electricity between objects with different electrical potentials, and it can damage electronic components and affect the overall functionality of the PCBA. The conformal coat helps dissipate the electrical energy from an ESD event, reducing the risk of damage.
Conformal coatings are particularly crucial in industries that require components to withstand extreme conditions, such as the aerospace industry. However, with the advancement of technology and the widespread use of electronic devices, the conformal coating process has become commonplace in many applications, including those used by the general public, such as mobile devices.
常见问题
硅树脂和丙烯酸保形涂料有什么区别
说到保形涂料的类型，丙烯酸涂料和有机硅涂料之间存在一些差异。丙烯酸涂料以其硬度著称，而有机硅涂料则更具柔韧性和更好的抗机械冲击性。此外，有机硅涂料还能承受更恶劣的使用环境，具有更好的憎液性和耐化学性。总之，有机硅涂料质地柔软，但坚韧耐用，是各种应用的最佳选择。
共形涂料中产生气泡的原因
保形涂料中的气泡是由于溶剂或空气夹杂在涂层材料中造成的。这些气泡会导致产品可靠性方面的各种长期问题，如形成导电通路桥、暴露区域腐蚀，以及由于温度波动、冲击或振动导致涂层开裂。
共形涂层是否必要
在印刷电路板上使用保形涂料以保护其免受有害环境和污染物的影响至关重要。湿气会加速分解、降低绝缘电阻并导致导体腐蚀，因此保形涂料是一项重要的保护措施。
共形涂层印刷电路板有多厚
通常，印刷电路板上的保形涂层厚度为 1 至 5 密耳（25 至 127 微米），在某些情况下甚至可以更薄。如果涂层超过这个范围，则很可能是封装或浇注化合物，它们具有更大的质量和厚度，可增强对电路板的保护。
能否通过共形涂层进行焊接
为了去除保形涂层和聚对二甲苯涂层，可以直接进行焊接。通常情况下，焊接后的表面效果会令人满意。
保形涂料出现橘皮的原因是什么？
保形涂料中的桔皮现象主要出现在溶剂型保形涂料中，如丙烯酸、聚氨酯和合成橡胶。这是由于涂层表面干燥不均匀造成的。
How Do You Protect PCB From Corrosion
One effective method to safeguard a PCB from corrosion is by applying a protective coating on the exposed copper sections. Various types of coatings, such as epoxy coatings, aerosol spray coatings, and solder masks, can be utilized for this purpose. Additionally, it is crucial to minimize the presence of humidity around the PCBs.
保形涂料和灌封有什么区别
保形涂层一般较薄，从 25 微米到 250 微米不等，因此与 PCB 灌封相比，保形涂层更轻。此外，它占用的空间也更小。保形涂料能有效防止腐蚀和微粒物质等潜在风险。此外，它还具有防水功能，可防止受潮。
共形涂料与非共形涂料的区别是什么？
Conformal coating provides protection to the board while allowing for convenient board repairs. On the other hand, a non-conformal coating, also known as potting or encapsulating, is significantly thicker than a standard conformal coat.
保形涂料是否防水
While conformal coatings can provide a layer of protection against moisture, it is important to note that they are not completely waterproof. Most coatings are semi-permeable, meaning they allow some moisture to pass through. However, conformal coating can effectively prevent current leakage and corrosion caused by ambient moisture.
What if Conformal Coating Is Too Thick
Excessively thick conformal coatings can lead to residual stress, which may result in damage to the electronic device being coated. In such cases, it is necessary to address the issue by either removing and reapplying the coating or grinding it down. The appropriate method to be employed will vary depending on the specific type of coating being used.
Chinese 
English 
German 
French 
Spanish 
Portuguese 
Korean 
Indonesian