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 Assemblaggio di PCB, Assemblaggio SMT, e Assemblaggio di PCB chiavi in mano 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.
Vantaggi principali
Alta precisione
- Coating is applied only where needed
- Protects critical components without affecting connectors
Riduzione del mascheramento
- Minimal use of tapes or boots
- Saves time and labor in Assemblaggio di PCB
Qualità costante
- Uniform coating thickness (typically 25–75 µm)
- High repeatability in Assemblaggio SMT
Risparmio di materiale
- Less coating waste compared to dip or full spray methods
Faster production
- Ideal for high-volume Assemblaggio di PCB chiavi in mano linee
Applicazioni tipiche
Selective coating with HumiSeal is used in:
- Elettronica per autoveicoli
- Sistemi di controllo industriale
- LED lighting PCBs
- Elettronica di consumo
- Aerospace and medical devices
These applications require both protection and precision.
Selective coating vs traditional methods
- Rivestimento selettivo → precise, automated, minimal masking
- Rivestimento a spruzzo → broader coverage, requires masking
- Rivestimento per immersione → full coverage, less control
- Rivestimento a pennello → manual, used for rework
Selective coating is considered the most advanced method in Assemblaggio 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
Conclusione
Selective coating with HumiSeal is a high-precision, automated method that applies conformal coating only where needed. In Assemblaggio di PCB, Assemblaggio SMT, e Assemblaggio di PCB chiavi in mano, it offers superior efficiency, consistency, and cost control compared to traditional coating methods.
We support HumiSeal and equivalent rivestimento conformale solutions for your PCBA projects.
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Shenzhen Tengxinjie Electronics Co., Ltd.


