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 Montering av kretskort, SMT-montering, och Nyckelfärdig PCB-montering 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.
Viktiga fördelar
Hög precision
- Coating is applied only where needed
- Protects critical components without affecting connectors
Reducerad maskering
- Minimal use of tapes or boots
- Saves time and labor in Montering av kretskort
Konsekvent kvalitet
- Uniform coating thickness (typically 25–75 µm)
- High repeatability in SMT-montering
Materialbesparingar
- Less coating waste compared to dip or full spray methods
Faster production
- Ideal for high-volume Nyckelfärdig PCB-montering linjer
Typiska tillämpningar
Selective coating with HumiSeal is used in:
- Elektronik för fordonsindustrin
- Industriella styrsystem
- LED lighting PCBs
- Konsumentelektronik
- Aerospace and medical devices
These applications require both protection and precision.
Selective coating vs traditional methods
- Selektiv beläggning → precise, automated, minimal masking
- Spraybeläggning → broader coverage, requires masking
- Doppbeläggning → full coverage, less control
- Beläggning med pensel → manual, used for rework
Selective coating is considered the most advanced method in SMT-montering.
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
Slutsats
Selective coating with HumiSeal is a high-precision, automated method that applies conformal coating only where needed. In Montering av kretskort, SMT-montering, och Nyckelfärdig PCB-montering, it offers superior efficiency, consistency, and cost control compared to traditional coating methods.
We support HumiSeal and equivalent konform beläggning solutions for your PCBA projects.
Få en offert på Conformal Coating
Letar du efter tillförlitliga lösningar för konform beläggning för ditt PCBA-projekt? Klicka nedan för att få en snabb offert.
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Shenzhen Tengxinjie Electronics Co, Ltd.


