guola
New Member
Hi,I have sent some PCB designs to factories for prototyping. The price, however, varies greatly. Some ask 200USD for a four-layer 5cm*10cm PCB prototyping. While some only ask for 50USD. I assume that there are differences between these two factories. However, I could not find the differences. Could I ask for some advice here?
My application:
My application:
- Mixed signal circuit, with precise analog circuit(10pA precision) with MCU runs at 168MHz with internal clock. It uses a 20MHz SPI.
- Long term stability is a concern.
- What are the criteria to choose an appropriate PCB manufacture?
- Should I care the plating? I noticed different processes using tin/gold/Pb and etc.
- What else kind of parameters should I check?
- How could I know the quality of a PCB?
- Thanks