![]() ![]() These supersede the older RS-274-D format, which is no longer supported by its developer UCAMCO. To briefly review, what are the standard Gerber file formats, and what do they encode? The two Gerber file formats are the RS-274-X format (released in 1998) and the newer X2 format (released in 2014). Experienced designers and fabricators have probably decoded the various Gerber file extensions, so this is focused more on newer designers. We’ve discussed what is a Gerber file and the various Gerber formats in other articles on this blog, but we have yet to really dig into the various file extensions for each format. Gerber files are the de facto industry standard format for encoding a PCB layout data into a format that is usable by vector photoplotters. If you’ve ever wanted to decode Gerber file extensions and formats, keep reading to learn more. What might seem like black magic to new designers is secretly intuitive, and it’s not as if one Gerber file extension is objectively “better” than another. The key to building and using these Gerber viewer applications is to understand the various Gerber file extensions and Gerber file formats. Some applications can very nicely reproduce the look and feel of a PCB layout with just a few active layers, such as the Gerber image I’ve shown above from one of our example press-fit connector layouts. If you’ve ever used an external Gerber file viewer, or you’ve used some PCB design applications with a built-in Gerber viewer, you know there are different formats and file extensions for Gerber files.
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