Convert GBR to PCB

Understanding GBR and PCB file formats

GBR files, also known as Gerber files, are the industry standard for describing the printed circuit board (PCB) images: copper layers, solder mask, legend, and more. They are used to communicate design data to PCB manufacturers. PCB files, on the other hand, are editable design files used by PCB design software (such as KiCad, Altium Designer, or Eagle) to store the complete schematic and layout information of a circuit board project.

Why convert GBR to PCB?

Converting a GBR (Gerber) file to a PCB file is often necessary when you want to edit or reverse-engineer a PCB design from its manufacturing output files. Since Gerber files are not inherently editable, converting them back to a PCB design format allows for modifications, analysis, or further development.

How to convert GBR to PCB

Direct conversion from GBR to PCB is not straightforward, as Gerber files lack schematic and component information. However, specialized tools can reconstruct PCB layouts from Gerber files, though some manual work may be required.

Recommended software for GBR to PCB conversion

• GerbView: This tool can import Gerber files and export them to various formats, including some PCB design formats. However, editing capabilities are limited.
• KiCad: With the File → Import → Non-KiCad Board File feature, you can import Gerber files and attempt to reconstruct a PCB layout. Additional plugins like Gerber2PCB can assist in this process.
• Altium Designer: Offers advanced import tools for Gerber files, allowing you to create a new PCB project from Gerber data via File → Import Wizard.
• EasyEDA: An online tool that can import Gerber files and convert them into editable PCB projects.

Step-by-step conversion using KiCad

1. Open KiCad and create a new project.
2. Go to File → Import → Non-KiCad Board File and select your Gerber files.
3. Follow the prompts to map Gerber layers to PCB layers.
4. Review the imported layout and make manual adjustments as needed.
5. Save the project as a .kicad_pcb file.

Important considerations

• Gerber files do not contain schematic or netlist information, so the resulting PCB file may lack connectivity data.
• Manual editing is often required to restore component footprints and electrical connections.
• Always verify the converted PCB layout before manufacturing or further design work.

Conclusion

While converting GBR to PCB is possible with the right tools, it is a complex process that may require manual intervention. KiCad and Altium Designer are among the best options for this task, offering robust import and editing features.