Apply HumiSeal conformal coating
Applying HumiSeal conformal coating, produced by Chase Corporation, requires controlled processes to ensure proper protection, adhesion, and reliability. In Сборка печатной платы, Сборка SMT, и Сборка печатных плат под ключ, correct application is critical to achieve consistent coating performance.

Surface preparation (most important step)
Перед применением Конформное покрытие, the PCB must be thoroughly prepared:
- Remove flux residues, oils, dust, and contaminants
- Use approved cleaning methods (solvent cleaning, ultrasonic, or deionized water)
- Ensure the board is completely dry
Poor cleaning is one of the main causes of coating defects in Сборка печатной платы.
Masking (protect no-coat areas)
Certain areas must not be coated:
- Разъемы и гнезда
- Test points
- Switches and contact surfaces
Use tapes, boots, or masking materials to protect these areas during Сборка SMT.
Choose the application method
HumiSeal coatings can be applied using several methods depending on production volume:
Spray coating (manual or automated)
- Most common method in Сборка печатной платы
- Provides uniform coverage
- Suitable for both low and high volumes
Селективное покрытие (автоматизированное)
- High precision using programmable machines
- Ideal for Сборка печатных плат под ключ производственные линии
- Снижает требования к маскировке
Нанесение покрытия методом погружения
- PCB is immersed in coating liquid
- Ensures full coverage
- May result in thicker coating
Покрытие кистью
- Used for small batches or rework
- Less consistent than automated methods
Контроль толщины покрытия
Maintain proper thickness (typically 25–75 µm):
- Avoid too thin (insufficient protection)
- Avoid too thick (risk of cracking or heat issues)
Thickness control is essential for consistent quality in Сборка SMT.
Процесс отверждения
After application, the coating must be cured:
- Сушка воздухом (common for acrylic coatings)
- Термоотверждение (for urethane or epoxy)
- УФ-отверждение (for UV-curable HumiSeal coatings)
Follow manufacturer specifications for time and temperature to ensure full curing.
Инспекция и контроль качества
After curing, inspect the coating:
- Use UV light to verify coverage (if UV tracer is present)
- Check for bubbles, voids, or missed areas
- Ensure no overcoating on masked areas
Inspection ensures coating quality in Сборка печатных плат под ключ.
Лучшие практики
- Maintain clean working environment
- Control humidity and temperature during application
- Use proper equipment calibration
- Train operators on coating techniques
Заключение
Applying HumiSeal conformal coating involves careful surface preparation, proper masking, controlled application, and thorough curing. In Сборка печатной платы, Сборка SMT, и Сборка печатных плат под ключ, following these steps ensures optimal protection, improved reliability, and long-term performance of electronic products.
We support HumiSeal and equivalent conformal coating solutions for your PCBA projects.
Получить цитату о конформном покрытии
Обеспечьте долговременную надежность ваших печатных плат с помощью наших решений по нанесению покрытий. Начните здесь.
Отправьте нам свои требования и получите быстрый ответ от нашей команды инженеров.
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Shenzhen Tengxinjie Electronics Co., Ltd.


