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Free DFM Check

As a value-added option for our Assembly services, we offer Free PCB File Check, also known as Free DFM, namely we help check your custom circuit board design file for possible issues that may affect manufacturability. If any issues were detected, we would get in touch immediately to solve the issue together, then schedule the PCB production accordingly.


The DFM will be carried out from 5 aspects: Drill Checks, Signal and Mixed Layer Checks, Power/Ground Checks, Solder Mask Checks, Silkscreen Checks. Read through the following paragraphs for more details.


1. Drill Checks


The Drill Checks action is intended to find potential manufacturability defects in drill layers (through, buried and blind via layers) and generate statistics on drill layers. It is intended to operate only on drill layers. It uses the drill layer, the top and bottom layers of its drill stack and any power or ground layer in the stack. The main checklist is displayed in the following Table 1.


Free DFM Checklist | PCBCart


2. Signal and Mixed Layer Checks


This function is intended to find potential manufacturability defects in Signal layers and mixed layers and generate statistics. The action can operate on any layer, but is mainly intended for signal layers. It uses the layer itself and any NC (drill or route) layer which pierces it. The main checklist is displayed in the following Table 2.


Free DFM Checklist | PCBCart


3. Power/Ground Checks


The Power/Ground Checks are intended to find potential manufacturability defects in power, ground and mixed layers. It uses different algorithms to diagnose negative and positive power and ground layers. The main checklist is displayed in the following Table 3.


Free DFM Checklist | PCBCart


3. Power/Ground Checks


The Power/Ground Checks are intended to find potential manufacturability defects in power, ground and mixed layers. It uses different algorithms to diagnose negative and positive power and ground layers. The main checklist is displayed in the following Table 3.


Free DFM Checklist | PCBCart


5. Silkscreen Checks


This function is intended to find potential manufacturing defects in silkscreen layers and generate statistics. The check operates only on silk screen layers because it relies on the job matrix to find the related external copper, solder mask and drill layers against which to check. The main checklist is displayed in the following Table 5.


Free DFM Checklist | PCBCart


Wanna take advantage of our Free DFM option? Start from sending a quote request for your custom PCB Assembly project to wonderful@wonderfulpcb.com Make sure you include your PCB design file, BOM and other specific requirements. Our agents will check your file and give a custom quotation within 1-2 working days.

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