GERBER file is an international standard optical format file, it contains RS-274-D and RS-274-X two formats, which RS-274-D is called the basic GERBER format, and to be accompanied by the D code file A complete description of a graphic; RS-274-X known as the extended GERBER format, which itself contains the D code information. Commonly used CAD software can generate these two formats.
How to check the correctness of the generated GERBER? All you need to do is import these GERBER and D-Code files in the freeware Viewmate V6.3 to see them on the screen or by using a printer.
Drilling data can also be generated by a variety of CAD software, the general format Excellon, Viewmate can also be displayed. No drilling data can not make PCB.
Converting a PCB file to a GERBER file and drilling data is very necessary for the PCB manufacturer.