![]() No extra charge (Green, Red, Yellow, Blue) The most popular three types of PCB surface finish. HASL with lead HASL lead free Immersion gold In PCB silkscreen legends processing, 1:5 is the most suitable ratioĭesign Half-Holes greater than 0.6mm to ensure better connection between boards. Thermosetting Ink is used in the inexpensive paper-based boards.Ĭharacters of less than 0.15mm wide will be too narrow to be identifiable.Ĭharacters of less than 0.8mm high will be too small to be recognizable. Liquid Photo-Imageable is the mostly adopted. The finished hole diameter will be smaller than size of drill bits because of copper plating in the hole barrelsįor example, if the drill size is 0.6mm, the finished hole diameter ranges from 0.52mm to 0.68mm will be considered acceptable. Any holes greater than 6.3mm or smaller than 0.3mm will be subject to extra charges.įor pads with vias in the middle, Min width for Annular Ring is 0.15mm(6mil). ![]() Min drill size is 0.2mm, max drill is 6.3mm. Please contact us if you need copper weight greater than 1.5oz. ![]() Inner copper weight as per customer’s request for 4 and 6 layers. Please contact us if you need copper weight greater than 3oz. Min manufacturable spacing is 4mil(0.1mm), strongly suggest to design spacing above 6mil(0.15mm) to save cost.Īlso known as copper weight. Min manufacturable trace is 4mil(0.1mm), strongly suggest to design trace above 6mil(0.15mm) to save cost. Normally “+ Tolerance” will occur due to PCB processing steps such as electroless copper, solder mask and other types of finish on the surface. ![]() Please contact us if your board exceeds these. If you have any questions or want to discuss unique requirements, please call contact your customer service.įor orders above 10 layers, please contact our sales rep.įor Flex, Rigid-flex, Metal-based (Aluminum etc.,), HDI, Halogen-free, High Tg, etc., please contact sales rep.Īny sizes beyond this dimension, please contact us. Within these parameters, there is enough variation to allow us to manufacture the board and then also for it to work properly in your application. Adhering to these tolerances will allow for proper manufacturing of your PCBs. PCBWay provides you below with the required in-house tolerance guidelines to ensure quality manufacturing of your printed circuit boards. ![]()
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