PCB cleaning before 塗層

PCB cleaning before 保形塗層 is a critical preparation step in PCB 組裝 和 SMT 組裝. It involves removing contaminants from the circuit board surface to ensure proper adhesion and long-term reliability of the coating.

Why PCB cleaning is important

期間 PCB 組裝, various residues can remain on the board, such as:

• Flux residues from soldering
• Dust and particles from the environment
• Oils or fingerprints from handling
• Ionic contaminants

If these contaminants are not removed, the 保形塗層 may not adhere properly, leading to:

• Delamination or peeling
• Reduced insulation performance
• Corrosion under the coating
• Electrical leakage or failure

Proper cleaning ensures the coating forms a uniform and reliable protective layer.

Common PCB cleaning methods

Solvent cleaning

Solvent cleaning uses chemical solvents to dissolve and remove contaminants.

• Fast and effective for flux removal
• Suitable for small to medium production in SMT 組裝
• Requires proper handling and ventilation

Aqueous (water-based) cleaning

Aqueous cleaning uses water combined with detergents.

• Environmentally friendly option
• Effective for removing ionic contamination
• Requires rinsing and thorough drying

This method is widely used in modern PCB 組裝 lines.

Ultrasonic cleaning

Ultrasonic cleaning uses high-frequency sound waves in a liquid solution.

• Removes contaminants from hard-to-reach areas
• Ideal for complex and densely populated PCBs
• Used for high-reliability electronics

Manual cleaning

Manual cleaning is done using brushes, wipes, or swabs.

• Suitable for rework or small batches
• Low cost and flexible
• Depends on operator skill

Drying after cleaning

After cleaning, PCBs must be completely dry before applying 保形塗層.

• Use hot air ovens or drying chambers
• Ensure no moisture is trapped under components

Moisture left on the board can cause corrosion and coating defects.

Cleanliness standards

To ensure quality in SMT 組裝, cleanliness is often verified using:

• Ionic contamination testing (e.g., ROSE test)
• Visual inspection under magnification
• Surface insulation resistance (SIR) testing

These checks confirm the PCB is ready for coating.

最後結論

PCB cleaning before 保形塗層 is essential to remove contaminants and ensure strong adhesion, electrical reliability, and long-term protection. In PCB 組裝 和 SMT 組裝, proper cleaning and drying directly determine the effectiveness of the coating and the overall performance of the electronic product.

取得保形塗層報價

需要保形塗層的專業支援？提交您的需求，並在 12 小時內獲得回應。.
將您的需求傳送給我們，並獲得我們工程團隊的快速回應。.

24 小時回應 ✔ 工程支援 ✔ 小型與大量生產

請啟用瀏覽器的 JavaScript，以完成此表格。.

名稱

名稱 檔案 電子郵件

電子郵件 *

WhatsAPP

首選材料

• 壓克力 (AR)
• 矽膠 (SR)
• 聚氨酯 (UR)
• 紫外線可固化 - UV
• 我不確定 / 需要建議

檔案上傳

拖放檔案、, 選擇要上傳的檔案 您最多可以上傳 8 檔案。.

請將所有 Gerber 檔案、Drill 檔案和 BOM 壓縮為單一的 .ZIP 或 .RAR 檔案，以加快處理速度。.

訊息

"「請列出不得塗覆的元件或區域（例如：連接器、測試點）」。如果您有特定的塗層材料要求（例如 HumiSeal），請在下面的訊息框中提及。.

提交

深圳市騰欣杰電子有限公司