Logic Need recommend the "intelligent" file formats like "IPC-2581 ver. B"  file format over the old formats (Gerber RS-274X artwork files / Excellon drilling files) to ensure superior manufacturability, quality, reliability and consistency.

1-	Open your PCB Design file on Altium Designer software, check integrity of the files. Here we used the file name "MyPCB.PcbDoc " as an example file.  Select the menu "File", then left-click "Fabrication Outputs",  and select "IPC-2581"
2-	In the "IPC-2581 Configuration" dialog, follow and select the parameters as shown here: (We use a light-green colored blocks for marking the required selections)  In the IPC2581 version field you MUST select Version B (we don't support version A).
3-	The XML-based IPC-2581 file will be exported to the location defined in the Output Path field, on the Options tab of the Project Options dialog.(by default the same location as your design files) It will be named using the format <PCBDocumentName>.cvg.   Place the exported *.cvg file only into an archive file (ZIP or RAR). Now, you are done. (We recommend that you give the file a quick check using any IPC-2581 viewer software. To download IPC-2581 Free Viewers click here )

▪	For more information about  IPC-2581 file format  [click here]