Communication PowerPC main control board PCB design case

[board type]

Communication PowerPC main control board

[Contacts]

14030 needle

[Floor]

16th floor

[highest signal rate]

10Gb / s

[difficult]:

1. Layout and wiring space is very tight

2. The cycle is tight, it takes 3 weeks to complete

3. A lot of power, are independent chip conversion, and the power chip package is larger. Filter capacitor design is very conservative, each power supply has a lot of filter capacitors

[Our countermeasures]:

1. Intensive layout

2. Wiring: Power planning has been completed at the time of layout. After fanning out, start wiring from the highest speed signal. The optical port 10G signal covers 14 layers. STUB meets the requirements without having to consider back drilling. Then there are other high speed signal lines.

3. Then plan the low speed signal. High-speed signals above 5G on the board are optimized according to high-speed signal processing:

1, empty drum through the hole

2, AC coupling capacitors do adjacent layer hollow

3, differential internal control within 5mil

4, routing arc optimization

5, walking in the best layer, the upper and lower layers are more power chips on the GND board