What is Impedance Control?

To make sure the quality of signal in complex design, we need to control the resistance and reactance of an electrical circuit.
Such as single-ended impedance 50 ohm ±10%, differential impedance  100ohm ±10%.

If you know what you want and need impedance control, please enclose the impedance requirement document along with the gerbers and select Yes.

If you don't know or don't need impedance control, I hope you can have a chance to select Yes for this option someday. :)

Fusion Technical Support

  1. What is Gerber file?
  2. What are the PCB panelization rules?
  3. How to generate the Gerber (manufacturing) files?
  4. What is the correct way to draw the silkscreen on the bottom side?
  5. My PCB does not require Solder Mask, what should I do?
  6. My PCB does not require Drill Holes, what should i do ?
  7. Which layer should I use in EAGLE for milling?
  8. What is the depth and width of the v-cuts/grooves?
  9. I don't want silkscreen on my PCBs, how can I proceed with a PCB Assembly order?
  10. What are the dimensions for Dielectric Separation thickness?
  11. What is the thickness of the inner copper layers?
  12. What are Blind and Buried Vias?
  13. What is the The Min Track/Spacing for 1oz./2oz./3oz. Copper weight
  14. What are Plated Half-Holes/Castellated Holes?
  15. How do I design non-plated through holes?
  16. What PCB materials are available in Seeed Fusion?
  17. What is the thickness of Fusion PCB?
  18. What PCB surface finishes are offered in Seeed Fusion?
  19. What color options are available for the solder mask/resist?
  20. What is the PCB copper weight?
  21. What is Impedance Control?
  22. PCB quantity
  23. How to generate Gerber files from PCBE
  24. How to generate Gerber files from Eagle
  25. How to generate Gerber files in Altium Designer
  26. How to generate Gerber files from CircuitMaker
  27. How to generate Gerber files from KiCAD
  28. How to generate Gerber files from DipTrace
  29. How to generate Gerber files from Proteus
  30. How to generate Gerber files from DesignSpark
  31. How to convert drilling layer from Gerber to Excellon format in CAM350
  32. Recommend size for BGA
  33. Solder Mask Dam
  34. What is the difference between Fusion standard PCB and Fusion Advanced PCB?
  35. What should i do when my Gerber files over too big (over 4MB)?

Feedback and Knowledge Base