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The server board is the core component of the server, responsible for connecting and managing various parts and components of the server. Compared to conventional PCB boards, server boards have stronger processing capabilities and higher reliability to meet the high-performance and continuous operation requirements of servers. The application of PCB in servers mainly includes acceleration boards, motherboards, power backboards, hard disk backboards, network cards, Riser cards, etc. Its characteristics are mainly reflected in the high number of layers, high aspect ratio, high density, and high transmission speed.

With the evolution of server platforms, server PCBs continue to develop towards higher layer boards. From initially using 8-12 layer PCB motherboards on the Purely server platform of PCIe 3.0, it has evolved to 20-24 layers or even more.
The main difficulty for drilling lies in the high number of layers and high copper content