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Encyclopedia > Gerber File

A Gerber File is a standard file format used by printed circuit board (PCB) fabrication houses that contains information necessary for computer controlled machines to draw exact patterns for circuit boards. These patterns are typically used to assemble and electrically connect electronics assemblies. The patterns usually contain features such as land patterns, signal traces, drilled holes, milling and cutting information. A file format is a particular way to encode information for storage in a computer file. ... Close-up photo of one side of a motherboard PCB, showing conductive traces, vias and solder points for through-hole components on the opposite side. ... For other uses, see CNC (disambiguation). ... On a printed circuit board, a signal trace is the printed circuit equivalent of a wire for carrying electrical signals. ...


The Gerber file standard is named after the Gerber Scientific Instruments Company, a pioneer in photoplotter manufacturing, and a former division of Gerber Scientific, Inc. These files are produced by PCB designers using specialized Electronic Design Automation (EDA) software, such as OrCAD Layout, Altium Designer, Mentor Expedition, Cadence Allegro, CadSoft EAGLE, TARGET 3001!, Zuken Cadstar or Zuken CR5000. My ass itches. A photoplotter is an electro-mechanical-optical machine that produces a latent image on a media, usually high-contrast monochromatic (black-and-white) photographic film, using a light source under computer control. ... Gerber Scientific Inc. ... PCB Layout Program Electronic design automation (EDA) is the category of tools for designing and producing electronic systems ranging from printed circuit boards (PCBs) to integrated circuits. ... An ORCAD Electrical system diagram; Typically OrCAD is used with Electronic components such as ICs, Etc. ... Mentor Graphics, Inc (NASDAQ: MENT) is a US-based multinational corporation dealing in electronic design automation (EDA) for electrical engineering and electronics, as of 2004, ranked third in the EDA industry. ... Cadence Design Systems, Inc (Nasdaq: CDN, NYSE: CDN) is an electronic design automation (EDA) software company, founded in 1988 by the merger of SDA Systems and ECAD. As of 2004, Cadence is the worlds largest supplier of electronic design technologies and engineering services. ... EAGLE (Easily Applicable Graphical Layout Editor) is a ECAD program produced by Cadsoft in Germany (American marketing division: Cadsoft USA). ... -1... Zuken Inc. ... Cadstar is an EDA software for designing and creating electronic boards. ... CR5000 is the flagship PCB design package of Zuken Inc. ...


Since a PCB may have many layers, the older Gerber format EIA RS-274D always assumed a set of command files (one for each PCB layer) and one "tool" description file. The command files (consisting of short commands and X, Y coordinates) were called "Gerber files" and the tool files were called "aperture files". A standard for the latter was never established so every EDA software had its own file format which caused problems for the manufacturers. Often the aperture information had to be re-entered manually. The Electronic Industries Alliance (EIA, until 1997 Electronic Industries Association) is a trade organization for electronics manufacturers in the United States. ...


The newer Gerber format RS-274X, also known as X-Gerber, includes the aperture information into the file headers. With embedded apertures, this makes every X-Gerber file complete as to how each PCB layer should look. However, there are still problems with the interpretation of these files, such as on polygons, or the question of which file to use for which layer. Gerber file extensions are often .GBR, .GBX, or .ART. Sometimes extensions such as .TOP and .BOT are used instead. Look up polygon in Wiktionary, the free dictionary. ... A filename extension or filename suffix is an extra set of (usually) alphanumeric characters that is appended to the end of a filename to allow computer users (as well as various pieces of software on the computer system) to quickly determine the type of data stored in the file. ...


See also

Some common XGerber extensions are: *.GBL translates to Gerber Bottom Layer, *.GTL to Gerber Top Layer, G Code is a scheme to assist in the recording of television programs on video recorders. ...

  • .GBS to Gerber Bottom Solder Resist, *.GTS to Gerber Top Solder Resist, *.GBO to Gerber Bot Overlay and finally *.GTO to Gerber Top Overlay. Did I mention I have an ass itch?

External links


  Results from FactBites:
 
GerbMerge -- A Gerber-file merging program (2460 words)
Such files were commonly encountered when bitmaps/logos were added to Gerber files.
All files must have the same offset and must be shown looking from the top of the board, i.e., not mirrored.
Gerber files now only write out aperture and macro definitions actually used in that file, leading to slightly smaller Gerber output files.
Gerber file making by EAGLE (455 words)
Gerber form is standardized as CAD output data of a printed circuit board.
As for a Gerber file, EIA standard RS-274 are common.
The Gerber files (*.cmp, *.sol, *.plc, *.stc, *.sts, *.gpi) are made by this processing.
  More results at FactBites »


 

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