What is Gerber file?
Gerber files should be inside a .rar or.zip archive with standard file extensions:
Extension Layer
- pcbname.GTL Top Copper
- pcbname.GTS Top Soldermask
- pcbname.GTO Top Silkscreen
- pcbname.GBL Bottom copper
- pcbname.GBS Bottom Soldermask:
- pcbname.GBO Bottom Silkscreen:
- pcbname.TXT Drills
- pcbname.GML/GKO *Board Outline:
- 4 layer board also need
- pcbname.GL2 Inner Layer2
- pcbname.GL3 Inner Layer3
PCB Outline is required. Drawing board outline in Eagle (layer 20).
![Image: https://seeed.uservoice.com/assets/117582142/%E5%A4%96%E5%BD%A2.png](https://seeed.uservoice.com/assets/117582142/%E5%A4%96%E5%BD%A2.png)
Gerber file is used for the manufacturing process.
Below is a picture on how to compress the necessary files.
![Image: https://cdn.sparkfun.com/r/600-600/assets/d/d/3/7/c/520e9363757b7fa96f8b4573.png Zipping gerbers](https://cdn.sparkfun.com/r/600-600/assets/d/d/3/7/c/520e9363757b7fa96f8b4573.png)
![Image: https://seeed.uservoice.com/assets/121685074/order%20Now.jpg](https://seeed.uservoice.com/assets/121685074/order%20Now.jpg)