DO NOT provide actual milling layers for PCB contour or internal cut-outs or slots as it is production dependent as we cannot use this data if provided.PTH and NPTH indication (if these are not supplied in separate drill data file).The exact position and size of any internal slots or cut-outs, ideally with dimensions (mm or inch).The exact PCB contour (profile), ideally with dimensions (mm or inch).It must contain at least the following information: The Mechanical Layer should contain the mechanical information necessary to produce your PCB. 10-If found accurate and forward to the manufacturer.Generating the Mechanical Layer Data file.9- Recheck and verify the file types using any gerber viewer software tool.8- Preferably produce time and date stamped Gerber files so that they would be back traced for any query.7- Layer PCB stackup: Before generating gerber files add layer stackup information in any enabled mechanical layers so that manufacturer can use information about PCB material such as base material thickness, pre-preg thickness type etc.6- Dimensional Information: PCB Dimensions information should be added on top overlay or mechanical or keepout layer of PCB design file before generating gerber files.5- Enable Top Overlay and Bottom Overlays which have information of components designators and PCB name, number, nomenclature debug information and test signal details etc.

However, they can have some information about mechanical parameter like PCB cutting or, 3D PCB footprints information, assembly and fixing in enclosures etc. A mechanical layer does not have any electrical information like in signal layer or plane layers. 4- Enable required mechanical layers in gerber setup.The keepout can also be asked to manufacturer for cutting boundary. 3- Enable Keepout layer, it is usually electrical boundary of the board.These are printed as negative image of layer. 2- Enable all plane layers which are solid copper and distribute power to the circuit on PCB.1- Enable all signal layers which have been used for routing in PCB design or those which have electrical signals routing should be enabled to re-produce in gerber format.In a gerber file following layers and information should be added: Request PCB Manufacturing & Assembly Quote Now 3.

Altium designer add mechanical layer