PCB板OSP表面處理工藝原理及介紹
2020-08-10
View:941
Author:ipcb
p>1 工藝流程:脫脂-水洗-微蝕刻-水洗-酸洗-純水沖洗-OSP-純水沖洗-乾燥.
2 OSP資料類型:松香, 活性樹脂和唑. 深連接電路中使用的OSP資料是現時廣泛使用的唑OSP.
What is the surface treatment process of PCB board OSP
3. 特點:平整度好, OSP膜和PCB墊銅之間未形成IMC, allowing solder and PCB copper to be directly welded (good wettability), 低溫加工技術, low cost (lower than HASL), 加工過程中能耗更低, 等. 它不僅可用於低科技PCB, 而且也在高密度晶片封裝基板上. PCB打樣Eugest板點數不足:1. 外觀檢查困難, and it is not suitable for multiple reflow soldering (three times are generally required); 2. OSP膜表面易劃傷; 3 存儲環境要求高; 4 儲存時間短.
4. Storage method and time: vacuum packaging for 6 months (temperature 15.-35 degree Celsius, humidity RH â ¤ 60%).
5. SMT現場要求:1. the OSP circuit board must be stored in low temperature and low humidity (temperature 15-35 degree Celsius, humidity RH â ¤ 60%) and avoid exposure to the environment full of acid gas. OSP的組裝應在開箱後48小時內開始; 2 建議在單側加載後48小時內使用, 建議存放在低溫櫃中,不要真空包裝; 3 建議在SMT兩側完成後24小時內完成dip.