10 Layer Printed Circuit Board 1.6MM Thickness Green Solder Mask
Main Features:
1 10 Layer customized printed circuit board manufacturered based on
customer's gerber files.
2 Used in Motor areas.
3 Material is FR4 S1000-2 TG170.
4 The finished board thickness is 1.6MM.
5 The finished copper thickness is 35UM.
6 Surface treatment is ENIG 2U'.
7 Drilling: L1-L10 0.2MM
8 Lead time is around 20 working days.
FQA:
Q1: What is HASL - Hot Air Solder Leveling?
A1:
HASL (Hot Air Solder Leveling) is a metallic surface finishing
technique, which is performed on the outermost layer of the PCB
board to protect the exposed copper surfaces like tracks until the
component placement and soldering is completed.
The HASL coating is composed of Solder with 63% Tin and 37% Lead,
and during the assembly process, this coating gets dissolved with
the soldering material.
The HASL Coating is applied as per the steps below:
- The process starts with the immersion of the PCB board into a
molten tin/lead solution, where all exposed copper area is covered
by this solution.
- After that, a Hot Air Leveler (HAL) ensures the uniformity of
solder deposit by removing the excess solder from the PCB board,
using high pressure hot air knives. The purpose of this is to leave
a uniform and thin possible layer on the board.
- This coating protects the copper traces from corrosion until the
board goes in for the assembly process.
Advantages of HASL:
- Resistance to copper corrosion
- Excellent wetting capability during the soldering process
- Provides excellent quality solder joint (solderability) by making
component soldering more effective
- Economical
- Can be re-worked easily
- Suitable for Lead-free PCBs
- Reduce the chances of PCB failure
Limitations of HASL:
- It offers high thermal stress to the PCB, which results in defects.
- Due to the inconsistent thickness of HASL coating, it’s not a
feasible solution for SMT component placement.
- Not suitable for PTH (Plated Through Hole) components.
- Less environment-friendly
