The Necessary Files & Info for Assembly Orders

1.For BOM

Please fill in designators(references), quantity, package and part numbers. For resistors or capacitors, if there is no part number, then value and package information is needed. It’s also better list components as PTH or SMD.
We do not accept BOM files in pdf because it's not convenient for us to do component-sourcing and is also not easy to avoid mistakes in file conversion. Check our example BOM for reference.

2.Necessary information to assemble components with orientation and polarity

Please add polarity cathode or anode mark and pin 1 in silkscreen layer.
If you do not want this information to be printed on the board, please send an individual assembly drawing file including those information to us.If the direction is different from the PCBWay convention, it needs to be clarified with us. Otherwise, we need to confirm with you again during the assemble process, which will waste time.

Here are some common practices at PCBWay factory, for example:
a. LED:By default, we usually use a dot, bar mark "I", sharp corners or "匚" on the silk screen layer to represent the negative electrode of the LED.
b. Tantalum capacitors and aluminum electrolytic capacitors: If there is a color band marking or "+" marking, it indicates the positive electrode of the capacitor.
c. Inductors: If there is a dot or special mark on the inductor, it indicates the polarity.
d. Chips: Identify the 1st pin according to the special mark.


Our sales will contact you for confirmation if we meet any questions

3.Pick&place/centroid file

We need completed pick&place file/centroid file including all the designators/references same as the ones in BOM, THT designators can be excluded. And designators in pick&place file should match the designators in silkscreen layer or assembly drawing file.

4.PCBA material preparation specifications