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 組裝, SMT 組裝, 以及 交鑰匙 PCB 組裝 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.

主要優勢

高精度

• Coating is applied only where needed
• Protects critical components without affecting connectors

減少遮蔽

• Minimal use of tapes or boots
• Saves time and labor in PCB 組裝

品質穩定

• Uniform coating thickness (typically 25–75 µm)
• High repeatability in SMT 組裝

節省材料

• Less coating waste compared to dip or full spray methods

Faster production

• Ideal for high-volume 交鑰匙 PCB 組裝 線路

典型應用

Selective coating with HumiSeal is used in:

• 汽車電子
• 工業控制系統
• LED lighting PCBs
• 消費性電子產品
• Aerospace and medical devices

These applications require both protection and precision.

Selective coating vs traditional methods

• 選擇性塗層 → precise, automated, minimal masking
• 噴塗 → broader coverage, requires masking
• 浸塗 → full coverage, less control
• 刷塗 → manual, used for rework

Selective coating is considered the most advanced method in SMT 組裝.

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

總結

Selective coating with HumiSeal is a high-precision, automated method that applies conformal coating only where needed. In PCB 組裝, SMT 組裝, 以及 交鑰匙 PCB 組裝, it offers superior efficiency, consistency, and cost control compared to traditional coating methods.

We support HumiSeal and equivalent 保形塗層 solutions for your PCBA projects.

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