One of the most critical stages in an electronic project is the point where the design enters production. A PCB that looks smooth on the screen can cause various problems in the typesetting stage. Inaccurate pad dimensions, too frequent placement of components or missing files are among the most common causes of these problems.
The majority of such errors are due to insufficient consideration of DFM, the design for manufacturability approach.
In this article, based on common situations in real production processes PCB typesetting We share in plain language what to pay attention to beforehand.
What is DFM and Why is it Important?
DFM aims to ensure that a design not only works, but can also be produced without problems.
In the PCB board typesetting process, this approach ensures that the board runs smoothly through the machines and post-production errors are kept to a minimum.
An error recognized at the design stage is solved quickly and at low cost. Errors carried into the production phase, on the other hand, slow down the process and increase costs significantly.
Files the Producer Expects from You
In order for a PCB to be typeset, complete data must be sent to the manufacturer. Basically the following files are requested:
- Gerber files
- BOM, component list
- Pick and place file
- Assembly notes if necessary
The most common cause of delay is missing or unverifiable part information in the BOM. If the part is unclear, the manufacturer has to look for alternatives and the process is prolonged.
Pad and Footprint Design
Pad dimensions must be suitable for the component package.
If too small a pad is used, the solder joint is weak. If too large a pad is used, solder overflows may occur.
Similarly, it is necessary to leave enough space between components. Overly dense layouts invite typesetting errors.
Using standard footprint libraries is the safest method at this point.
How Should Component Layout Be?
Layout is not just about fitting parts on the board. It directly affects production.
Placing polarity components in the same direction facilitates the control process.
Heat emitting components need to be positioned appropriately.
If necessary, a separate assembly process should be planned for sensitive parts.
A more organized layout reduces the risk of errors on both the machine and operator side.
Why Panel Design Matters?
Paneling provides a serious advantage in mass production.
Panel size must be suitable for the production line. Copper should not be left too close to the board edges. Also fiducial points need to be added for alignment.
These markings play a critical role, especially on boards with small components.
Solder Paste and Stencil Harmony
The correct amount of solder paste must be applied. The stencil design is decisive here.
In case of incorrect design, components may not fit properly, solder splashes or poor connections may occur.
Since this issue is more sensitive with small components, it is useful to check with the manufacturer.
Card Pre-typesetting Checklist
A quick check before submitting your file will speed things up:
- Are the Gerber files complete?
- Is the BOM complete and clear
- Is the pick and place file correct?
- Are component orientations clear
- Are there fiducial points
- Has the DRC check been done?
Thanks to these controls, the production process runs much more smoothly.
Conclusion
A prepared in accordance with DFM rules PCB board design, speeds up the production process and reduces costs. It also increases the probability of getting the right result on the first production run.
Elektroent we do DFM analysis on incoming designs and share critical points before production. You can check your design against this list before sending it or share it directly with us.
bilgi@elektroent.com | +90 (216) 466 46 37
