Home > SMT Assembly News

Gerber files in PCB Manufacturing

The basic purpose of a printed circuit board (PCB) is to provide signal flow paths to the appropriate components, as well as provide mechanical support of the PCB's components. A PCB is a silicon board with tracks of conductive material (e.g., copper) placed on it that connect the various components.

A PCB without any components placed is termed a "bare" PCB, which is commonly made by stacking layers of insulating material and conductive material. The generally used conductive material is copper whereas the most common insulating material is FR-4. Some other types of fiber glass are also used. Various materials can be used based on specific requirements of better strength, dielectric or thermal conductivity. Although there are many different methods of making a PCB, the most common method will be discussed here. The subtractive process of PCB manufacturing starts with composite material sheets, which are copper plated on one or both sides completely. Tracks or traces are developed once the copper layer is selectively removed from the board; this leaves required tracks on the finished boards. Gerber files provide a picture of the remaining copper tracks after the subtractive process is completed.

copper remains on every layer with black representing copper and the rest being clear
It refers to a picture of how and where copper remains on every layer with black representing copper and the rest being clear. It's not just copper on a PCB because copper tends to get oxidized easily when exposed to air making it difficult to adhere with solder. Generally, there is a solder mask, green in colour over the copper as well as the legend, silkscreen or nomenclature, which is comprised of white letters. Gerber files also provide information regarding holes, cutouts in a stencil, solder mask paint and the silkscreen.

Manufacturers typically receive about 9 files for every basic 2-layer PCB. These files include:
  • Top layer image of copper conductor on the PCB
  • Bottom layer image of copper tracks on the PCB
  • Image of the solder mask for the top layer
  • Image of the bottom layer solder mask
  • Image for the silkscreen on top layer
  • Image for the silkscreen on bottom layer
  • Information regarding holes (their locations, properties and descriptions). Mostly NPTH (mentioned later) and PTH are two separate files.
  • Internal cut-outs and various machining operation (e-g: slots, scoring) which are the outline of a board are included
  • A file with information regarding name and purpose of each and every of the above mentioned files, mostly named as README.


SMT Reflow Oven, Lead free Reflow Oven, Reflow Oven Manufacturer, LED reflow oven, PCB Reflow Oven, Nitrogen Reflow Oven, Dual Rail Reflow Oven, China Reflow Oven, wave soldering machine, Dual Rail Wave Soldering Machine, Nitrogen Wave Soldering Machine, Wave Soldering Machine Manufacturer.

Flason Electronic Co.,ltd provide a full SMT assembly line solutions, including SMT Reflow OvenWave Soldering MachinePick and Place MachineSMT Stencil PrinterSMT AOI SPI MachineSMT Reflow OvenSMT Peripheral EquipmentSMT Assembly lineSMT Spare Parts  etc any kind SMT machines you may need, please contact us for more information: wechat whatsapp:+8613691605420, Skype: flasonsmt, Email: sales@flason-smt.com
1) This is the first time I use this kind of machine, is it easy to operate?
There is English manual or guide video that show you how to use machine.
If you still have any question, please contact us by e-mail / skype/ phone /trademanager online service.
2) If machine have any problem after I receive it, how can I do ?
Free parts send to you in machine warranty period.
If the part is less than 0.5KG, we pay the postage.
If it exceeds 0.5KG, you need to pay the postage.
3) MOQ ?
1 set machine, mixed order is also welcomed.
4) How can I buy this machine from you? ( Very easy and flexible !)
A. Consult us about this product on line or by e-mail.
B. Negotiate and confirm the final price , shipping , payment methods and other terms.
C. Send you the proforma invoice and confirm your order.
D. Make the payment according to the method put on proforma invoice.
E. We prepare for your order in terms of the proforma invoice after confirming your full payment.
And 100% quality check before shipping.
F.Send your order by air or by sea.
5)Why choose us ?
A. Gold supplier on Alibaba !
B. Trade assurance to US$54,000 !
C. Best price & Best shipping & Best service !


Contact: Mr Tommy

Phone: +86 13691605420

Tel: +86 -755-85225569

Email: sales@flason-smt.com

Add: No.94,Guangtian Road,Songgang Street,Bao an District Shenzhen China