Manufacturer datasheets (IPC-7351 standard recommended).
: The physical translation of the schematic. Designers place components on the board and route copper "traces" to establish connections. PCB Design
The history of PCB design mirrors the history of electronics itself. Before the advent of printed circuits, electronics were assembled using point-to-point wiring. This was labor-intensive, prone to failure, and resulted in bulky, unreliable devices. Manufacturer datasheets (IPC-7351 standard recommended)