A good start is to understand how much space vias should occupy and follow a set of PCB via size guidelines to help you decide where and when to utilize this asset.Īlthough vias are typically round and proceed vertically through the board structure-as opposed to horizontally, as copper traces do in most cases-they have the same objective. They can be both underused and overused, and designers must find the proper balance for their design. Vias come in various sizes and have different applications on circuit boards. However, the most important reason that the demand for smaller boards is able to be met is the increase in the use of multiple-layer stackups and vias. There have been a number of technological advancements that have made these changes possible, including more compact components, thinner on-board traces, and higher density interconnect (HDI) connectors. The challenge in achieving this objective has been how to improve or enhance functionality and capability while simultaneously reducing board size. The trends toward smaller circuit boards-and electronics products in general-over recent decades is undeniable. While some of us may believe in the “bigger is better” philosophy, one area where smaller or more compact is often preferred is PCBA development. What are the restrictions on PCB via size?
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January 2023
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