We have certainly come a long way in the field of technology. In the early days people were hardly concerned about the design part of the device. Neither size nor appearance was important. Nowadays, both the features are equally important. These days size of every electronic product is decreasing but the features in these products are increasing. Computer, to laptop, to mobiles in small pocket sizes. One of the reasons for the change is use of Surface mount devices (SMD).  Now question arrives what is SMD?As technology grows the demand for less weight and smaller size component increases. This leads to new improved technology known as surface mount technology (SMT). Surface mount components are similar to plated through hole as far as there electrical function is concerned but the key difference is in their size.