A PCB or printed circuit board is the foundation that we use in designing electronic devices. As a PCB manufacturing company, we understand that PCB fabrication has two important roles, which are:
1. Granting mechanical support to the components in the electrical design
2. Connecting the component parts electrically by means of conductive pathways
In today’s world of electronics, the leveraging of a printed circuit board can lead to a simple, but compact electronic device design or the fabrication of high-scale integration designs that are essential in the construction of processing units and microcontrollers.
Manufacturing a PCB involves a series of complicated steps that we entirely follow so that the product can be used harmoniously in the design and creation of electronic devices.
Preparing the Board that will be the PCB
The kind of materials that we will use and the preparation of the board will depend on the quality of the product that you want to achieve as a designer and distributor of the electronic device. The first step in PCB fabrication is the creation of the laminate. We accomplish this by applying pressure on curing layers of paper or cloth with thermoset resin to build a final evenly thick panel.
The kind of material we use in the curing process will determine the classification of the laminate and the function it can do. The qualities considered in the classification include dielectric constant, tensile strength, shear strength, fire resistance, and loss factor.
This is an important step whose method varies according to the final product that you want. However, most of the procedures that we use in PCB assembly conceal the laminate using coppers on both sides of the board, and then continue to removing the copper from unnecessary places, which lead to the required fine copper traces. This is called the subtractive method, which is quite inexpensive to use but more harmful to the environment compared to the more complex additive method.
The additive method in PCB fabrication uses an electroplating procedure so that the copper traces in the laminate will form the necessary circuitry. It creates fewer residues and uses less copper, but it involves some more steps, which makes it a more complex method compared to the subtractive method.
Individual Technique in the Etching Process
In any etching process that we use, there are also other options when it comes to application method and some of the major ones are:
1. Small volume method
This technique involves using a photo mask and printing into a see-through film together with photosensitized boards. We etch using tiny end mill or CNC mill that has a spade shaped cutter or using laser resist ablation to remove the unnecessary copper traces from the laminate.
2. Large volume method
This etching procedure used in PCB fabrication involves the silkscreen printing method, which is the primary commercial method and the photographic alternative used when you need fine line widths.
3. Hobbyist method
In this method, we use laser print resistance technology to print to a transparent layer using a laser before we heat transfer it using bespoke laminator or iron to an exposed laminate, and then touch it up using a marker before we etch it. In this category, other methods are difficult to accomplish in mass productions.
Drilling Holes into the Board
The next step is to drill holes where the components need to go. This is done by using small diameter drill bits made from coated tungsten carbide. We use high-speed automatic drills in order to avoid tearing up and damaging the copper tracks.
The Best Approach
PCB fabrication needs a huge investment when it comes to knowledge and infrastructure. As such, you can consider outsourcing to us to avoid wasting your money in creating a system that may not be as productive as you would want it to be. Outsourcing your PCB services to a dependable company is the most economical approach for your business.
The printed circuit boards are one of the most important components in the world of electronics today. Click this website pcbnet for more idea about PCB.