Nowadays, precise components is widely used in some advanced electronics devices, such as fine pitch FPGA component from Xilinx. But this take extra challenge to PCB designer and PCB manufacturing capability accordingly.
Today, we simply discuss the PCB design guideline for 0.4mm fine pith BGA component to facilitate in PCB manufacturing.
Standard guideline points:
- No circuit track allowed between BGA PADs.
2. Minimum PAD size 0.127mm with 0.1mm laser hole drilled on (this could save space for PCB layout and reduce final PCB size). And suggest to use stack up: 0.8mm type or 1.2mm type.
3. The minimum spacing between track and holes：0.15mm(refer below picture)
4. Recommend to use Via in PAD design for BGA area holes.
Advanced technology limitations for 0.4mm pitch BGA PCB design
1.2mm stack up guideline (only for 4L):
0.8mm stack up guideline (only for 4L):
If you need stack up for 6L PCB board and have more questions to us please contact us by firstname.lastname@example.org.