Part 2 - COMMON PCB FABRICATION SPEC
1oz (COMMON Copper Thickness)
1 oz copper refers to the thickness of the thin copper layer on the top and bottom of the 2 layer PCB board. The etching of this copper layer will form the copper trace that helps connect your electronic circuit IC chips, active and passive components. Traces that carry signal do not carry much current, therefore the copper layer thickness is usually not a concern. 1oz copper will meet most of the electronic circuit application.
For power circuits or high current design, you may need more copper area to conduct the current. If you have enough space on your PCB layout, you can design your trace to be wider. The wider the trace, the more current it can carry without generating obvious heat on the trace. If space is tight for your high current trace, you may like to consider making the copper layer thicker on the PCB board.
There is a number of standard copper oz available.
Common copper oz:
0.5 oz, 1 oz, 2 oz
1oz is a safe choice. If your circuit carries 2A or more, you may like to consider a 2oz copper. There are a lot type of apps for oz trace resistance calculator to calculate the resistance and heat that generated from your PCB layout design.
Green Mask (COMMON Solder Mask Colour)
Green solder mask is the main thing that makes most PCB boards look green. The solder mask is basically a layer of coating to resist against the molten solder.
You can choice colour for your PCB board, other than green. The advantage of doing the typical green mask is that the printed trace can easily be seen, which helps troubleshooting and maintenance work. Green is good for eyes, another reason to use a green mask. Trace that uses white or black colour mask makes it less visible to our eye. If you want to make it slightly tougher for people to study or reverse engineer your board, it can be a good choice.
White SilkScreen (COMMON PCB Labeling Colour)
White silkscreen is the typical white labelling printed on the PCB board. The labelling allows us to identify the component’s position, orientation, value. It is also commonly used to print out the model product, version and other manufacturing information.
The White colour is a safe colour and is a suitable contrast against a wide variety of PCB base colour (mask colour), except for white base colour.
HASL (PCB Finishing)
HASL stands for Hot Air Solder Leveled. It is a cost effective process to prevent the copper surface (unmask area or the soldering copper pad) from getting oxidise. Copper surface when it is left out in the air without proper storage will get oxidise on the copper surface. The oxidisation will make solder more difficult. Even if soldering is possible, the joint may not be good. HASL basically coat a layer of solder on the surface of the copper pad to prevent the surface from oxidising. HASL is the most widely used and effective finishing.
In order to let our user experience on using our service, we offer FREE PCB Board Fabrication on COMMON PCB specification in 5pcs quantities and X & Y edge of board should =<100mm each.
Remember don’t design board in ODD shape!!!
** Term and condition applied.