Summary： Identify the probable PCB layer type of a Gerber or drill file by its filename.
Gerber files are files that all circuit design software can produce. They are also called stencil data in the electronic assembly industry, and light painting files in the PCB manufacturing industry. It can be said that Gerber files are the most common and most widely used file formats in the electronics assembly industry. Therefore, for an electronics manufacturing company, it is very important to have a computer-aided manufacturing CAM software that can handle Gerber files. It has the effect of assisting in improving quality by arranging production preparation, manufacturing, and testing processes.
Gerber file is the standard format of EIA and is divided into RS274-D and RS274-X. RS274-X is an extension file of RS274-D. The production and manufacturing department shall, as far as conditions permit, require the user or the design department to provide the Gerber file of RS274-X, which is conducive to the production preparation of each process.
Below shows the Gerber extensions generated by different commonly used PCB design softwares.
CAD: kicad
Files:
board-F_Cu.gbr Top Copper Layer
board-F.Cu.gbr Top Copper Layer
board-F.Cu.gtl Top Copper Layer
board-F_Mask.gbr Top Soldermask
board-F.Mask.gbr Top Soldermask
board-F.Mask.gts Top Soldermask
board-F_SilkS.gbr Top Silkscreen
board-F.SilkS.gbr Top Silkscreen
board-F.SilkS.gto Top Silkscreen
board-F_Paste.gbr Top Solderpaste
board-F.Paste.gbr Top Solderpaste
board-F.Paste.gtp Top Solderpaste
board-B_Cu.gbr Bottom Copper Layer
board-B.Cu.gbr Bottom Copper Layer
board-B_Mask.gbr Bottom Soldermask
board-B.Mask.gbr Bottom Soldermask
board-B.Mask.gbs Bottom Soldermask
board-B_SilkS.gbr Bottom Silkscreen
board-B.SilkS.gbr Bottom Silkscreen
board-B.SilkS.gbo Bottom Silkscreen
board-B_Paste.gbr Bottom Solderpaste
board-B.Paste.gbr Bottom Solderpaste
board-B.Paste.gbp Bottom Solderpaste
board-In1_Cu.gbr Inner Copper Layer
board-Inner1.Cu.gbr Inner Copper Layer
board-Inner1.Cu.g3 Inner Copper Layer
board-Edge_Cuts.gbr Board Outline
board-Edge.Cuts.gbr Board Outline
board-Edge.Cuts.gm1 Board Mechanical Layer
board.drl Drill Layer
board-NPTH.drl Drill None Plated Layer
board-top.pos Gerber Drawing
board-bottom.pos Gerber Drawing
CAD: eagle
Files:
board.CMP Top Copper Layer
board.top Top Copper Layer
board.STC Top Soldermask
board.tsm Top Soldermask
board.PLC Top Silkscreen
board.tsk Top Silkscreen
board.CRC Top Solderpaste
board.tsp Top Solderpaste
board.SOL Bottom Copper Layer
board.bot Bottom Copper Layer
board.STS Bottom Soldermask
board.bsm Bottom Soldermask
board.PLS Bottom Silkscreen
board.bsk Bottom Silkscreen
board.CRS Bottom Solderpaste
board.bsp Bottom Solderpaste
board.LY2 Inner Copper Layer
board.ly3 Inner Copper Layer
board.DIM Board Outline
board.mil Mill Layer
board.gml Board Mechanical Layer
board.TXT Drill Layer
board.xln Drill Layer
board.exc Drill Layer
board.drd Drill Layer
CAD: altium
Files:
board.gtl Top Copper Layer
board.gts Top Soldermask
board.gto Top Silkscreen
board.gtp Top Solderpaste
board.gbl Bottom Copper Layer
board.gbs Bottom Soldermask
board.gbo Bottom Silkscreen
board.gbp Bottom Solderpaste
board.g1 Inner Copper Layer
board.gm3 Board Mechanical Layer
board.gko Board Outline
board.txt Drill Layer
CAD: orcad
Files:
board.TOP Top Copper Layer
board.SMT Top Soldermask
board.SST Top Silkscreen
board.SPT Top Solderpaste
board.BOT Bottom Copper Layer
board.SMB Bottom Soldermask
board.SSB Bottom Silkscreen
board.SPB Bottom Solderpaste
board.IN1 Inner Copper Layer
board.FAB Board Outline
board.TAP Drill Layer
CAD: geda-pcb
Files:
board.bottom.gbr Bottom Copper Layer
board.bottommask.gbr Bottom Soldermask
board.bottomsilk.gbr Bottom Silkscreen
board.fab.gbr Drill Layer
board.plated-drill.cnc Drill Layer
board.out.gbr Board Outline
board.top.gbr Top Copper Layer
board.topmask.gbr Top Soldermask
board.toppaste.gbr Top Solderpaste
board.topsilk.gbr Top Silkscreen
CAD: eagle
Files:
board-name.boardout.ger Board Outline
board-name.bottomlayer.ger Bottom Copper Layer
board-name.bottomsilkscreen.ger Bottom Silkscreen
board-name.bottomsoldermask.ger Bottom Soldermask
board-name.bcream.ger Bottom Solderpaste
board-name.drills.xln Drill Layer
board-name.internalplane1.ger Inner Copper Layer
board-name.internalplane2.ger Inner Copper Layer
board-name.toplayer.ger Top Copper Layer
board-name.topsilkscreen.ger Top Silkscreen
board-name.topsoldermask.ger Top Soldermask
board-name.tcream.ger Top Solderpaste
