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Printed circuit boards have evolved tremendously over the last few decades and most of them now have a compact size and accommodate several components and dense circuitry. Accurate mounting of components on a circuit board along with the wires is of paramount importance as incorrect mounting will not only hamper the functioning but also cause shorting of circuits. The components or surface mount devices (SMDs) must be chosen carefully. There are many SMD packages you can choose from based on size, dimensions, and other factors. This post discusses the details of surface mount device packages and how to choose the right one.
Surface mount devices are electronic components which are mounted onto a circuit board, usually using surface mount technology (SMT). There are other mounting methods too, such as thru-hole technology and soldering. However, SMT is popular as it offers accurate output and does not require drilling of holes. There are various SMD packages. In a single package, there are a specific type of devices or components, which are usually mass produced. These packages act as component categories which help recognize their type and physical characteristics. The nomenclature of these SMD packages is based on their dimensions and physical attributes. They need to comply with the EIA specifications and are defined by the JEDEC Solid State Technology Association. A major reason behind the popularity of SMT is that it supports automated processes, which means they can be transferred from one place to another by using pick and place automated tool. This makes it easy for the PCB manufacturer and assembler.
With the increasing demand for miniature devices, the size of the boards and that of the components has shrunk too. But the fact that the mounting of SMDs can be totally automated has made it convenient for manufacturers. Else, it would have been difficult to mount extremely small components and connecting them to the right wires. There are SMT packages for resistors, capacitors, integrated circuits, microprocessors, and so on. Here are some of the popular surface mount device packages.
While these packages have identical IC SMDs, there are some packages with multiple types of IC SMDs, which are gradually gaining traction. Some of these include thin small outline package (TSOP), shrink small outline package (SSOP), and very small outline package (VSOP).
If you are an OEM who requires a complex circuitry for your product to function, you can partner with an experienced PCB manufacturer and service provider. You may want to share your application requirements with the service provider and seek help in choosing the right materials, components, SMD packages, and so on for the PCBs. Sierra Assembly is a US-based manufacturer of PCBs and assemblies offering customized and end-to-end PCB assembly solutions.