As the center of command, PCBs are the most important part in electronic circuits and equipment. Without a sound and well-founded PCB design or PCB layout, any PCB and the device it powers is most certainly bound to fall flat.

We can say that PCB(Printed circuit board ) are the brain of almost all electronic and mechanical devices. 

1.1Gerber files

Gerber files are the CAD file generated from a PCB design software like Eagle and Altium that a PCB manufacturer can refer with to build the PCB layer structure. The most commonly support Gerber file format is RS-274X.

1.2Schematic Capture or Schematic Entry

Schematic capture or entry is the step in the PCB design cycle where the electronic diagram or schematic of the designed electronic circuit is made using a schematic capture tool or a schematic editor. Normally, a manual hand sketch of the circuit design precedes schematic capture.

A schematic capture tool allows you to design a document that represents electronic component symbols and the interconnections between them in a graphical way. Before a PCB is generated, the symbols are mapped to component footprints, while the symbol interconnections are converted into a netlist that details the connections between the component footprints in the layout process.

1.3 Circuit Simulation

Once an electronic circuit is designed, circuit simulation is done to analyze and test the initial design. Most schematic capture tools allow you to perform interactive circuit simulation with the same schematic circuit representation used for layout, which is rather convenient.

1.4 NC Drill File

A numerically controlled (NC) file specifies the size and position of holes used for unplated holes, plated through-holes, and holes for vias.

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