source:Industry News release time:2021-09-13 Article author:sznbone Popular:pcb
Most engineers are accustomed to designing the PCB files and sending them directly to the circuit board factory for processing. However, the most popular method in the world is to convert the PCB files into GERBER files and drilling data and submit them to the circuit board factory. ?
High frequency PCB
Because electronic engineers and PCB engineers have different understanding of circuit boards, the GERBER file converted by the circuit board factory may not be what you want. For example, when you design the parameters of the components in the PCB file, you don’t want these The parameters are displayed on the finished PCB. You haven't explained them. The circuit board factory keeps these parameters on the finished PCB. This is just an example. If you convert the PCB file into a GERBER file, you can avoid such incidents.
The GERBER file is an international standard gerber file format. It contains two formats: RS-274-D and RS-274-X. RS-274-D is called the basic GERBER format, and it must be accompanied by a D code file. Describe a picture completely; RS-274-X is called the extended GERBER format, which itself contains D code information. Commonly used CAD software can generate these two format files.
Why does the PCB factory require gerber files?
Drilling data can also be generated by various CAD software, the general format is Excellon; of course, circuit boards cannot be made without drilling data.
Gerber file suffix meaning
GTL—top of toplayer
GBL—bottomlayer bottom layer
GTO—TopOverlay top silk screen layer
GBO—Bottomlayer bottom silk screen layer
GTP—TopPaste (for laser template)
GBP—BottomPaste bottom surface paste
GTS—Topsolder top solder mask (also called anti-tin layer/green oil, negative film)
GBS—BottomSolder bottom solder mask
G1—Midlayer1 internal wiring layer 1
G2—Midayerr2 internal wiring layer 2
...
GP1—InternalPlane1 internal plane 1 (negative film)
GP2—InternalPlane2 internal plane 2 (negative film)
...
GM1—Mechanical1 mechanical layer 1
GM2—Mechanical2 Mechanical layer 2
...
GKO—KeepOuter forbidden wiring layer
GG1—DrillGuide drilling guide layer
GD1—DrillDrawing drilling layer
GPT—ToppadMaster top main pad
GPB—BottompadMaster bottom main pad
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