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 PCB 어셈블리, SMT 어셈블리, 및 턴키 PCB 어셈블리 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.
주요 이점
높은 정밀도
- Coating is applied only where needed
- Protects critical components without affecting connectors
마스킹 감소
- Minimal use of tapes or boots
- Saves time and labor in PCB 어셈블리
일관된 품질
- Uniform coating thickness (typically 25–75 µm)
- High repeatability in SMT 어셈블리
재료 절약
- Less coating waste compared to dip or full spray methods
Faster production
- Ideal for high-volume 턴키 PCB 어셈블리 라인
일반적인 애플리케이션
Selective coating with HumiSeal is used in:
- 자동차 전자 제품
- 산업용 제어 시스템
- LED lighting PCBs
- 가전 제품
- Aerospace and medical devices
These applications require both protection and precision.
Selective coating vs traditional methods
- 선택적 코팅 → precise, automated, minimal masking
- 스프레이 코팅 → broader coverage, requires masking
- 딥 코팅 → full coverage, less control
- 브러시 코팅 → manual, used for rework
Selective coating is considered the most advanced method in SMT 어셈블리.
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
결론
Selective coating with HumiSeal is a high-precision, automated method that applies conformal coating only where needed. In PCB 어셈블리, SMT 어셈블리, 및 턴키 PCB 어셈블리, it offers superior efficiency, consistency, and cost control compared to traditional coating methods.
We support HumiSeal and equivalent 컨포멀 코팅 solutions for your PCBA projects.
컨포멀 코팅 견적 받기
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