![]() Resistors are divided into two distinct groups based on their assembly. Nowadays, the larger sizes are rarely used due to their robust structure and their occupation of large board spaces. The PCB size requirements are getting smaller while the density of the components positioning in the single board increases. Therefore, the 0201 measures 2 x 1 hundredths of an inch. The figures refer to the dimensions in hundreds of an inch. On the other side, the resistors and capacitors are manufactured in a standardized manner. Therefore, there are no widely used standards regarding their manufacturing. Other components that present a minor part are crystals and coils, and due to specific requirements, they are often custom-made. Naturally, the capacitors and resistors are the main components of this group. Passive SMDs are electrical components that are used to adjust the voltage and amperage of the electric current. Passive SMD components - Capacitors and Resistors Regardless of size and shape differences, the SMD components are regularly classified based on their electronic functions. Surface-mounted devices (SMDs) are electronic components attached to printed circuit boards during the SMD assembly process. ![]() The innovation in terms of soldering under high temperatures challenged a material scientist to discover optimal materials that will be great insulators to electric components by having high thermal resistance values. The soldering under high temperatures where paste transforms in the solid became the standard technique for permanent mounting electronic components onto boards. Secondly, once appropriate materials were developed in the form of the solder paste, there was a need to design a process that will permanently fix SMDs to printed circuit boards. Besides containing metal powder that melts during the soldering phase, the solder paste must own adhesive property to hold components firmly before and during the soldering stage. Firstly, the discovery of materials suitable for connecting with pins that don't affect electric conductance and cause open circuits. The SMDs passed through many development phases until they fulfilled all electrical and mechanical properties requirements for successful SMD assembly.īesides SMDs structure, the two other factors were critical for successful SMD assembly. The SMD's specific design showed dominance upon traditionally used through-hole electronic packages that required large PCB space and manual mounting of lead into holes. It wouldn't even come into existence if the rise of surface-mounted devices (SMDs) didn't occur as well as the invention of their assembly. This technique is famous for its high efficiency and the wide range of flexible solutions it offers. Surface-mount technology is our favorite technique that we use here at Semecs production facilities. ![]()
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