PCB Files & Manufacturing
Gerber file names and layer mapping
Identify copper, mask, silkscreen, outline, paste and drill files without relying on a single filename convention.
File extensions describe conventions, not guarantees
Different CAD tools name the same manufacturing layer differently. Clear descriptive .gbr names and traditional layer extensions can both be useful. The file content and layer mapping must agree; renaming a native PCB project does not turn it into Gerber.
Common layer names
| Purpose | Common examples | Check |
|---|---|---|
| Top / bottom copper | .GTL / .GBL; F_Cu / B_Cu | Tracks, pads and filled zones |
| Inner copper | .G1, .G2; In1_Cu, In2_Cu | Actual order through the stackup |
| Solder mask | .GTS / .GBS; F_Mask / B_Mask | Openings exposing copper |
| Silkscreen | .GTO / .GBO; F_Silkscreen / B_Silkscreen | Text and component legend |
| Board outline | .GKO, .GM; Edge_Cuts | Closed profile and cutouts |
| Paste | .GTP / .GBP; F_Paste / B_Paste | Stencil apertures, not solder mask |
| Drilling | .DRL or Excellon .TXT | Hole sizes, coordinates and plating |
These examples are not a mandatory naming rule. A mechanical-layer file may contain notes instead of the outline. Numbered PCB Wizard files need their export report or an explicit mapping.
Add a short layer map when needed
For ambiguous names, include a README listing each filename and its function. For multilayer boards, list copper layers from top to bottom. Identify plated/non-plated holes, slots and any special drill span. Include the design revision and units used in supporting drawings.
Avoid ambiguous archives
- Do not combine different board revisions or multiple alternative exports.
- Do not rename files solely to make an automatic preview accept them.
- Keep the original CAD output names when they already describe the layers clearly.
- See the software-specific export links in the Gerber package checklist.
Upload to DIYIPCB
Open DIYIPCB PCB / PCBA Online Quote, upload the Gerber ZIP and choose the material, specifications and quantity. Verify the displayed dimensions and layer count against your design; the preview is a reference, not engineering approval.
For bare PCBs, the Gerber ZIP must also contain the drill data. For assembly, provide a matching BOM and placement file as well. Use the available cart or inquiry option for your selected service. See BOM and placement-file requirements.
Still need help?
Email service@diyipcb.com with your order or request reference and the details of your question.