The Gerber file format(RS274X) is the de facto standard for Printed Circuit Board (PCB). It is the standard file used by printed circuit board (PCB) industry software to describe the printed circuit board layers: copper layers, solder mask, legend, etc.
Gerber files should be inside a .zip archive with standard file extensions.
Certain CAD Tools generates files with different extensions even though it follows RS274X format.In such case it can be renamed to match the layers as shown below.
Board Outline file(.GKO) is a must as it is used for routing(cutting) the board edge.This file defines the outline of the board including any inner slots or cutouts.It should only contain the outline data and no other data should be present.
Drill file should be in Excellon format.Non-Plated Drills can be mentioned either in board outline or in a second drill file which contains text "NPTH" in the filename
|Board Dimension||No minimum size|
|Board Layers||1,2,4 Layers.
*4 Layer Boards On request
|Board Copper Weight||1 oz (35mm),2 oz (70mm)|
|Board Thickness Tolerance||± 10%|
|Minimum trace spacing/width|
|Minimum distance between Trace and Copper Pour||
For 1oz ≥ 8mil
For 2oz ≥ 12mil
|Circuit to edge|| |
|Minimum distance between Vias (plated holes)|| |
|Minimum distance between Silk Screen and Solder Pad|| |
|Width of Solder Mask Dam||
|Minimum distance between Via(plated holes) and trace|| |
|Drill Hole Diameter(Mechanical)||0.2 - 6.3mm|
|Minimum silkscreen height/trace width||
height ≥ 0.5842mm /23mil
trace width ≥ 0.1016mm /4mil