Why is PCB storage so important?

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Why is PCB storage so important? [Copy link]

In daily life, we usually go shopping in shopping malls or large supermarkets. We will see that most products have a shelf life. The shelf life of these products is provided by the manufacturer and marked on the products with limited use. During the shelf life, the manufacturer of the product is directly responsible for the quality of the product meeting the relevant standards or the quality conditions of the express guarantee. The seller can sell these products with confidence and consumers can use them safely. So, now as an editor who has been focusing on the PCB industry for many years, I would like to tell you about the key points of PCB preservation.

Circuit boards are not like other products we buy. They have strict requirements for contact with air and water. First of all, the PCB board cannot be damaged in vacuum. When packaging, a layer of bubble film should be placed around the box, because the bubble film has good water absorption, which plays a good role in moisture-proofing. Some moisture-proof beads can also be placed to achieve the purpose of moisture-proofing to a certain extent. After sealing the box, the products should be stored off the ground in a dry and ventilated place and avoid direct sunlight. Secondly, the temperature and humidity of the factory warehouse should also be controlled within the specified standard range.

The specific storage time of PCB circuit boards is not only related to the production capacity and production process of the PCB manufacturer, but also has a lot to do with the region where it is located. For the storage time, baking time and temperature of PCB boards, specific problems must be analyzed specifically. It is necessary to make specific decisions based on the production capacity, process, region and season of different PCB circuit board manufacturers on the basis of PCB control specifications. For PCB boards that are not used for a long time, it is best for circuit board manufacturers to apply a layer of three-proof paint on them. The function of the three-proof paint can prevent moisture, dust and oxidation. In this way, the storage life of the PCB board will be increased to 9 months. For example, PCBs made by OSP anti-oxidation process and pure immersion gold process generally have a shelf life of 6 months after packaging. Baking is generally not recommended for OSP process.

In fact, the storage time of PCB circuit boards is related to the surface treatment. Immersion gold and electroplated gold have the longest storage time. Under constant temperature and humidity conditions, they can be stored for two to three years. Doing a good job in PCB storage can better extend the service life of the circuit board, which is an issue that cannot be ignored. Jieduobang PCB has always insisted on superb technical strength, excellent production equipment, perfect testing methods, product quality that exceeds industry standards, and warm and thoughtful service, winning praise and welcome from global merchants and users.

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For PCB boards that are not used for a long time, it is best for the circuit board manufacturer to apply a layer of three-proof paint on them. The three-proof paint can prevent moisture, dust and oxidation.

How to deal with conformal coating when reused?

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PCB bare board will not be painted with three-conformal paint, otherwise it will cause welding failure. All components are welded and then sprayed with three-conformal paint.