Usually, PCB fabricators publish some maximum aspect ratios that are manufacturable, which can serve multiple processes like microvias and through small holes. This leads to broken nets when it has to do with a via hole, and assembly failure when it has to do with a plated thru hole. Higher aspect ratios or when the ratio increases than the highest possible which a fabricator can support may lead to insufficient hole plating. ![]() When the PCB aspect ratios are smaller, then there is a higher probability that the copper plating stays consistent all through the hole’s length. Particularly, aspect ratios are important in making sure that they achieve reliable plating process. What Does PCB Aspect Ratio Mean and What is its Significance?Īspect ratio can be defined as the ratio between the hole diameter and the material’s thickness through which it pierces through. Also, we will explain how to verify this aspect ratio, how to eliminate uncertainties surrounding PCB aspect ratios, and more. In this article, we will be answering this question by explaining what PCB aspect ratio is and its importance. However, how do you know that your specific design will meet the manufacturer’s capability of the PCB aspect ratio? This is very important for HDI (high density interconnect) boards. There are some that even go an extra mile to publish their highest aspect ratio for each hole type. ![]() Most PCB fabricators usually publish the production capability of their PCB aspect ratio.
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