The printed circuit boards are made up of copper and depending upon the requirements of the board, the copper is plated to a substrate. To get a secure fit it needs to be lined and bonded together.
Designing the board is the most important step before you start with the manufacturing process. Based upon these blueprints you will be able to start with the designing. The design that is required for the various materials of the PCB manufacturing service will be done through software.
The design is printed
A special printer that is available at the PCB manufacturing service of GREATPCB SMT LIMITED will provide you providing the print. This will also provide you with a film where all the details of the board will be shown.
Preparing the Substrate
From this step, the formation of the structure will take place. The substrate is a material that will hold the structure along with the components. The copper is first pre-bonded on both the sides of the layer. Then it is etched so that the design is available from the printed films.
Print the inner layers
To laminate the body of the structure the design is first printed. A photo-reactive chemical that is used in the photosensitive film will start hardening when this will be exposed to an ultraviolet ray. The blueprint will help in the aligning process by drilling the holes.
After the alignment is done, the ultraviolet rays will harden the photoresist. The light will in carrying out the process. After it gets harden the board will then be washed in an alkaline solution so that the excess photoresist can be eliminated.
Remove the unwanted copper
The unwanted copper that is attached to the board needs to be removed. A chemical solution will help you in this process. They will take out the excess copper from the board and the photoresist remain at the same place.
The board is then checked for alignment and in this process, the holes will help. This will help in placing the inner as well as outer layers easily. A pin will help in keeping the layers together.
Lamination of the layers
As the layers are fused, the boards will try to take the shape. As the laminating process begins the metal clamps will help in laminating the layers. This is done with the help of copper foil and also with resin.
Pressing the Layers
To press the layers a mechanical press will be applied on the board and along with that, the pins are also punched so that it is properly aligned. These pins are removed depending upon the requirement if needed. If everything is proper then the board will go for the laminating press where pressure and heat will be applied.
The holes are drilled through the layers with the help of the computer-guided drill so that it can expose the inner panels as substrate and the extra copper has been shredded.
This is how the designing, as well as the manufacturing process, is carried out.