With the acceleration of electronic product iterations, PCBA (Printed Circuit Board Assembly) as a core component, its storage conditions and preservation period directly affect product reliability. Hengtian Yi relies on years of electronic manufacturing experience, combined with industry standards and technical practices, to provide scientific PCBA storage solutions for enterprises.
Storage Period and Storage Standards for PCBA Products – Hengtian Yi’s Professional Solutions
1. Factors Affecting the Storage Period of PCBA Products
The storage period of PCBA is influenced by multiple factors and needs to be discussed categorically:
Surface Treatment Process
The differences in oxidation resistance among different processes are significant:
Gold Plating, Electroplated Gold: The longest storage period, under constant temperature and humidity (23±3℃, 55±10%RH) conditions can last up to 2-3 years.
Immersion Gold, Tin Spraying: The conventional storage period is 6 months, which can be extended to 9 months after applying a conformal coating.
OSP, Immersion Silver, Immersion Tin: The shortest storage period (about 3 months), needs to be used as soon as possible.
Environmental Conditions
Temperature: The ideal range is 20-25℃, extreme high temperatures (>35℃) or low temperatures (<15℃) will accelerate material aging.
Humidity: It is recommended to control at 40-70%RH, excessive humidity can lead to metal oxidation or delamination.
Cleanliness: Dust and corrosive gases can cause circuit short circuits or poor contact.
Protective Measures
Using conformal coatings (moisture-proof, dust-proof, oxidation-proof) can increase the storage period by 3-9 months; vacuum packaging combined with desiccants can isolate air and moisture, suitable for long-term storage.
2. Hengtian Yi’s PCBA Storage Management Standards
Based on ISO standards and industry practices, Hengtian Yi proposes the following storage requirements:
1. Environmental Control
·Temperature and Humidity Control: Use constant temperature and humidity equipment (such as Hengtian Yi HTY-800 series), stabilizing temperature at 23±3℃, humidity at 55±10%RH.
·Anti-static Measures: Storage racks must be grounded, PCBA must be packaged in anti-static bags, surface resistance value ≤1×10^9Ω.
·Air Purification: Warehouses must be equipped with fresh air systems, filtering PM2.5 and corrosive gases such as sulfides.
2. Packaging and Protection
·Short-term Storage (< 6 months): Use moisture-proof bags + bubble wrap packaging, with built-in humidity indicator cards.
·Long-term Storage (> 6 months): Must be vacuum packaged and coated with conformal coating, with batch and expiration date labeled.
·Sensitive Components: BGA and others must be stored separately, and must be used or re-dried within 12 hours after opening.
3. Inventory Management
·First In, First Out (FIFO) : Avoid overdue storage, regularly sample for oxidation and solder joint status.
·Revival Treatment: Moisture-affected PCBA must be baked at 120℃ for 8 hours, and can be used after drying.
3. Technical Advantages of Hengtian Yi’s Storage Equipment
Hengtian Yi’s self-developed intelligent storage system integrates multiple core technologies:
·Dynamic Temperature and Humidity Monitoring: Real-time feedback data to the central control platform, automatic alarm for deviations beyond limits.
·Modular Design: Supports partitioned storage, meeting the independent environmental needs of different process PCBAs.
·Energy Saving and Consumption Reduction: Using variable frequency compression and heat recovery technology, energy consumption is reduced by 30% compared to traditional equipment.
Through the above solutions, Hengtian Yi has helped multiple enterprises extend the PCBA storage period from the conventional 6 months to over 3 years, significantly reducing material waste rates.
4. The storage period of PCBA is not a fixed value and needs to be dynamically adjusted based on processes, environments, and protective measures. Hengtian Yi recommends enterprises:
Store classified by surface treatment process, prioritizing the use of OSP and other short-cycle boards;
Invest in constant temperature and humidity equipment and anti-static facilities to avoid hidden losses;
Establish a digital inventory management system for full lifecycle traceability.
Through scientific storage, the reliability of PCBA and enterprise benefits will be improved simultaneously. Hengtian Yi will continue to innovate, providing more efficient storage solutions for the electronic manufacturing industry.
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