Selective coating with HumiSeal
Selective coating with HumiSeal conformal coating, developed by Chase Corporation, is an automated process that applies coating only to specific areas of a PCB, rather than covering the entire board. It is widely used in modern Сборка печатной платы, Сборка SMT, и Сборка печатных плат под ключ for precision and efficiency.

How selective coating works
Selective coating systems use programmable equipment to control exactly where the coating is applied:
- CAD data or teaching programs define coating paths
- Robotic valves or spray heads dispense HumiSeal precisely
- The machine avoids connectors, test points, and sensitive areas
- Coating is applied in controlled patterns and thickness
This eliminates the need for extensive manual masking.
Ключевые преимущества
Высокая точность
- Coating is applied only where needed
- Protects critical components without affecting connectors
Уменьшение маскировки
- Minimal use of tapes or boots
- Saves time and labor in Сборка печатной платы
Неизменное качество
- Uniform coating thickness (typically 25–75 µm)
- High repeatability in Сборка SMT
Экономия материалов
- Less coating waste compared to dip or full spray methods
Faster production
- Ideal for high-volume Сборка печатных плат под ключ линии
Типичные применения
Selective coating with HumiSeal is used in:
- Автомобильная электроника
- Промышленные системы управления
- LED lighting PCBs
- Потребительская электроника
- Aerospace and medical devices
These applications require both protection and precision.
Selective coating vs traditional methods
- Селективное покрытие → precise, automated, minimal masking
- Напыление → broader coverage, requires masking
- Нанесение покрытия методом погружения → full coverage, less control
- Покрытие кистью → manual, used for rework
Selective coating is considered the most advanced method in Сборка SMT.
Important process considerations
- Proper PCB cleaning before coating
- Correct viscosity settings for the machine
- Accurate programming of coating paths
- Post-coating curing (UV, thermal, or moisture)
- Inspection for coverage and defects
Заключение
Selective coating with HumiSeal is a high-precision, automated method that applies conformal coating only where needed. In Сборка печатной платы, Сборка SMT, и Сборка печатных плат под ключ, it offers superior efficiency, consistency, and cost control compared to traditional coating methods.
We support HumiSeal and equivalent конформное покрытие solutions for your PCBA projects.
Получить цитату о конформном покрытии
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