Electronics are an essential part of our daily lives. Starting from cars to our smartphones includes electronic components. At the heart of these components is a printed circuit board (PCB). Most people recognize the panels when they see them. These are small green chips covered with copper components that you will find in the center of emptied electronic devices. Made of copper, fibreglass and other metal components, these panels are insulated with a welding mask and held together with epoxy.

Nevertheless, have you ever checked those boards with elements solidly stuck on? They shouldn’t be regarded as an adornment of a PCB board. A printed circuit board with components accelerated on is called assembled PCB, and the manufacturing process is called PCBA, also know as PCB assembly. These functions range from the easy to the complex, and yet the size of printed circuit boards can be little in size than a thumbnail.
The question that needs to be answered is, how are the components made? The process of assembling a board is simple, as it contains various automatic and manual steps. At each stage of the process, the PCB manufacturer has the option of choosing between an automatic and a manual option. To help you understand the PCB assembly process from the beginning

PCB manufacturing is the ability to assemble printed circuits used in computers and electronics. The layers of the card are linked together with a specific surface pattern so that they can be used in the manufacture of electronic products.

PCB Design Basics
The PCB assembly always starts with the essential unit of the printed circuit board: the base, which contains several layers, and each one plays an important role in the functionality of the final printed circuit board. The alternating layer are highlighted below: 

• Substrate: provide PCB with the right rigidity and it is a very important material of a PCB fabrication
• Copper: A thin layer of conductive copper foil is an addition to each operative side of the printed circuit board; it can be single-sided PCB on one side and double-sided PCB on both sides. It is termed the layer of copper traces. 
• Solder mask: the solder mask is on too of the copper more lay, which provides each PCB with its characteristic green colour. It insulates copper traces from coerced contacting other facilitative materials, which could affect in short. The solder also keeps everything in its place. Holes in the solder mask area where solder is applied to fix elements to the board. Solder mask is an important step for facilitating the manufacturing of PCB assembly since it stops soldering from taking place on parts with shorts escape.
• SilkscreenThis the final layer on a PCB board. This white silkscreen adds labels to the printed circuit board in the form of symbols and characters. It helps to show the functions of each element on the board

These elements and materials remain largely the same through all printed circuit boards, except the substrate. The substrate material of a PCB changes according to the specific qualities like cost — each designer is searching for in their finished product.