If you don't pay attention to the PCB circuit board production, and touch the pad of the circuit board with fingers, especially the immersion gold / immersion silver / gold-plated circuit board, it will be oxidized and when soldering the components, it will easily cause the PCB circuit board to fall off and be scrapped. Because finger prints are sweat stains, ingredients are some inorganic salt and fat and so on, it is easy to cause circuit board paralysis. What are the dangers of fingerprint?
In a very short period of time, the bare object touches the board and causes the copper surface to oxidize. Some time later, it will show obvious fingerprint after electroplating and uneven coating.
The touching before doing soldermask, resulting in the bad adhesion of green oil, which will bubble and fall off in HASL.
If the PCB board has fingerprint before the wet film,silk screen line or pressed film, which can easily cause the adhesion of dry / wet film to decrease, and it lead to the separation of plating and coating during electroplating. The gold plate is easy to cause the pattern of plate surface, and after the completion of welding resistance, the plate surface is oxidized,there will be 2 different colors.( hdi pcb)
Process of pcb manufacturing:
Our Company is UL,ISO9001,ROHS and GJB9001B certified.
Packing and Shipping:
1. How to Get a quotation?
For PCBs,pls send us the Gerber File.For PCBA,pls send us the Gerber file and BOM(Bill of Materials)
2. What is the MOQ?
No MOQ.1 pcs is ok.
3.What is the lead time?
For PCB orders,the lead time is 2 to 10 days.For PCBA orders,the lead time will be 15 to 30 days.
4.Will the boards be tested before shippment?
Yes,all PCBs will be tested by Flying Probe or E-test.For PCBA,we will have AOI,X-ray,and functional test
Email us to get a quote: firstname.lastname@example.org