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Surface Mount Technology or an SMT is a method of manufacturing circuit boards. The alternative to this would be through-hole circuit boards with different circuit board designs. Most circuit boards that you see in mobile phones today are a bunch of small chips placed on top of a circuit board panel.

Surface Mount Technology

A circuit board with surface mount technology will not necessarily have holes inside. Instead, they are on top of copper pads and copper traces on the circuit board. This surface mount technology is a semi-automated process that allows manufacturers to build all the different circuit boards in-house for various products.

With the help of this technology, manufacturers can easily mount electronic components on the surface of printed circuit boards. This mounting technique is very different from the insertion technique that manufacturers conventionally use with holes.

In other words, it is an alternative to the older practices of developing circuit boards with the help of through holes. Since it is a newer rendition, it overcomes many shortcomings of the through-hole technology on the surface mount.


One of the critical characteristics of the surface mount technology is an SMD, otherwise called a surface mount device. When you browse the markets, you will find multiple range packages of SMD. These packages vary in different sizes and shapes.

SMD Passive Components

A large portion of the SMD resistors are either capacitors or resistors. The package sizes of these passive components come in sizes standard pack. Other surface mount device components include crystals and coils.

Resistors and capacitors generally vary in dimensions, shapes, and sizes. Other forms of SMD components that you can find include diodes and transistors. These are often very small in regards to shape and size. They connect within a circuit board with the help of leads.

Approximately three leads are included within these packages. Identifying which way the device must shift can help with the manufacture of the printed circuit board.

Integrated Circuits

You will find that there is a variety of packages that come in handy for integrated circuits. The use of the package depends entirely on the amount of interconnectivity that the component needs. For instance, a logic chip is only installed with 14 to 16 pins. On the other hand, other processors and chips can come with about 200 or more.

Since requirements can vary so greatly, there are a number of different packages that you can find. Like the packages, the processes in the SMT process also differ from the conventional through-hole PCB method.

Solder Paste Printing

One of the most distinctive processes of the SMT method involves solder paste printing. This refers to the place where you need components. The printed circuit board usually comes with a very fine and thin piece of metal.

On the circuit board, there are solder pads. In surface-mount technology, stencils and squeegees usually do the job of applying solder to the appropriate pads on the circuit board. This method of solder mask application is becoming very widely used and popular. This is especially the case in the subcontract sector.

To Conclude

As you can see, the surface mount technology has great significance today and is prevailing against the conventional through-hole method. The characteristics of the surface mount technology in the PCB manufacturing industry, along with its large-scale implementation are speeding up the manufacture of electrical appliances and technology. This, in turn is accelerating the world towards a prosperous future.