The surface finish for PCB

HASL is an abbreviation of Hot Air Solder Level. The most common used and cheapest way.

Advantages of HASL
Excellent wetting during component soldering
Avoids copper corrosion.
Disadvantages of HASL
Low planarity on vertical levelers may make this surface finish unsuitable for use with fine pitch components. Improved planarity can be achieved using a horizontal leveler.
High thermal stress during process may introduce defects into PCB



HASL lead free
If you choose Hasl without lead. We will use the Halogen Free material(RoHs).  



ENIG is an abbreviation of Electroless Nickel/Immersion Gold which is also known as soft gold.
excellent surface planarity (particularly helpful for PCBs with large BGA packages), good oxidation resistance, and usability for untreated contact surfaces such as membrane switches and contact points.


Hard gold is often used for gold finger.Not good at soldering.

Fusion technical support

  1. What is Gerber file?
  2. What are the PCB panelization rules?
  3. How to export the drill files correctly?
  4. Can I use another software beside Eagle to generate the Gerber files?
  5. What is the correct way to draw the silkscreen on the bottom side?
  6. If my PCB does not require Solder Mask, what should I do?
  7. If my PCB do not require Drilling Holes, what should i do ?
  8. Which layer should I use in EAGLE for milling?
  9. What is the depth of the v- cut?
  10. If my PCB's do not have the silkscreen, how can I proceed with my PCBA order?
  11. Exporting manufacturing files from Altium Designer
  12. Export PCB gerber from Cam
  13. How to generate gerber from KiCAD?
  14. How to export the correct drilling layer from eagle
  15. What is the Minimum inner trace width for 4 layers?
  16. What is the minimum trace width?
  17. What are the dimensions for Dielectric Separation thickness?
  18. What is the inner layer copper thickness?
  19. What is the range for the drilling hole diameter?
  20. What is Blind/Buried Via?
  21. What is the The Min Track/Spacing for 1oz./2oz./3oz. Copper weight
  22. How to output drill file correctly ?
  23. Is the board outline could only be rectangle ?
  24. What is the layer?
  25. What is Half-cut/Castellated Holes.
  26. V-cut rules
  27. How can i do if i do not required to make plated through holes?
  28. Options of Fiducial
  29. What is the size of the Fiducial?
  30. How do plated through slots work on the Gerber ?
  31. The dimension for PCB
  32. The material for FR-4/Aluminum Board/FPC
  33. The thickness of PCB
  34. The surface finish for PCB
  35. The color of solder mask
  36. The copper weight for PCB
  37. What is Impedance Control?
  38. PCB quantity
  39. How to generate the gerber files from Altium Designer

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