If the wood pulp paper or cotton pile paper with low density is used as the base material, it can overcome or reduce the punching white ring and cutting board edge. If the design of the tool is not suitable and the edge is not sharp enough, the punching white ring and cutting board edge will appear.
In the early days, because the lines of the PCB board were relatively wide, the line pattern was also relatively simple. Some simple lines were punched by FR- 4 copper clad laminate. Because the strength of glass cloth is very high, it is easy to appear punching white ring situation. If you use CEM- 3, because its core is using cellophane, the situation is much better. But with the development of printed circuit to high density and fine line, high precision printed circuit board is processed by NC drilling.( order custom 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: email@example.com