PCB Facts

AMAZING FACTS ABOUT PCBS THAT YOU PROBABLY DIDN’T KNOW!

They say, experience is knowledge and elders are probably some of the most knowledgeable people in the world. With over 20 years’ experience (RUSHPCB) in PCB design, assembly and manufacturing, we have experienced tremendous changes in the PCB world and realized some interesting facts about PCBs that very few manufacturers or scholars will talk about. Please join us as we discuss some of the amazing facts about Printed Circuit Boards that people know little about.  You can learn more about PCB design, manufacturing, design and fabrication from our blog .

The first invention of the PCB

The PCB technology was started by an Australian inventor by the name Paul Eisler, who made a radio using the printed circuit board which was able to work effectively. He invented this radio in the year 1942 though he began his experiments using the PCB in the year 1936. Since then, continuous improvements have been made in PCB production. Mass production and usage of the PCB got rampant from the 1950s up to the present age where PCBs are being widely used and applied in many areas of the electronic industry.

The most important steps in the design of a PCB

After a particular need that requires to be implemented by use of a PCB has been identified and its concept realized, the design process goes through the following six steps; drawing of the schematic, realization of the board-level block diagram, Component placement, First-pass routing, Routing verification and testing. Of all this steps, the most important step is the PCB routing procedure .It basically involves the connection of the placed components together so as to form an electrical connection. It is a complex process since very many connections have to be made while ensuring that the requirements of the routing process are not violated. These requirements are like; ensuring that there are no cross overs between traces, that coupling does not occur etc. If the six steps of designing a PCB are not met the process has to be redone until the designed output is obtained.

Resistance of the conductors

Engineers are quite familiar with the law of resistance that goes by the scientific name Ohm’s Law. Hence in making high precision PCB circuits they have to account for the resistance of the traces because they can have degrading effects. Copper which is the most widely used conductor in making the PCB traces is not a superconductor. The process of designing and manufacturing PCBs is dictated by the Ohm’s Law

Reason why most PCBs are green in color

Most printed circuit boards that are been produced are green in color since they are made from glass-epoxy that is naturally green and also because they are coated using a solder mask which is usually green in color. Glass-epoxy is a composite material made from a combination of woven glass fabric surfaces and epoxy synthetic resin. The solder mask which is also green in color is for insulating and protecting the underlying copper traces from environmental factors such as humidity, for preventing short circuits during wave soldering and also preventing the oxidation of the copper traces. Although the solder mask can be of any color, green is the most recognized and commonly accepted standard industrial color that is used by many PCB manufacturers.

There are two general methods of assembling PCBs

These two methods are the Through Hole Construction and the Surface Mount Assembly. The first one which is a bit traditional is the Through Hole Construction method. This method basically involves inserting pin-through hole (PTH) components into holes drilled into the printed circuit boards (PCBs) and fixing the ends or leads to pads on the other side with metal solder. This method was designed to replace the point to point construction. The other method of PCB assembly which is a bit newer is the Surface Mount Assembly method. This method involves placing or mounting components directly to the surface of the PCB. It has replaced the Through Hole technology though the two methods may still be used interchangeably on the same circuit board, such a case may occur when a large transformer needs to be mounted on a PCB.

A PCB can consist of more than one layer

A PCB can be single sided, double sided or multiple sided. The single sided PCBs have been in the market for a very long time, they date back to the 1950s when production of PCBs on large scale started. They are easily designed and manufactured since they only require one layer of copper. The double sided PCBs were an improvement from the single sided PCBs and consist of two layers of copper. The other type is the multi-layer PCB. It is a development of the double sided PCB. Use of multi-layer PCB enables higher component concentration. Different layers in a double sided and multi-layer PCB are separated from each other by use of dielectric material which may be FR4 Fiber glass Laminate or B stage PrePreg Fiberglass material. The conductors on the different layers of the multi-layer PCB are connected using plated-through holes called vias.

Analogue and digital circuits are located on different sections of the PCB

During manufacture of the printed circuit board, the analogue and digital circuits should be physically separated as much as possible. High level analogue signal are usually separated from other low level analogue signals and both are kept away from digital signals. This practice is observed so as to ensure that noise from the digital portion does not interfere with the sensitive analogue circuits. When the PCB is partitioned into digital and analogue regions the task of separation is simplified.

It is possible to get a personalized PCB

Nowadays it is possible for one to get his or her own custom made PCB by just making an order. By just giving the specifications of the PCB that one can acquire his customized PCB. A company such as RUSHPCB UK specializes in making PCB and one can place an order for a personalized PCB through our website https://www.rushpcb.co.uk/. We have a user friendly manufacturing cost and deliver their products on time.

PCB technology is evolving and more improvements are being made

Since the first PCB board was made by Paul Eisler in the year 1942, a lot of improvements have been made since then. These transformations have been seen in the increase in the layers of a PCB, development of better PCB materials, development of new PCB assembly methods, etc. In our current world, more research is being conducted so as to develop and improve the quality of the PCBs. This evident in the current trends in the PCB industry such the goal of miniaturizing the PCB, the desire to increase the complexity and performance of the PCB, the need for more efficient PCB materials, and many more.

With vast experience in delivering quality PCB prototypes, we are dedicated to improving the design, assembly and prototyping process from the design engineers to delivery. As leaders in the PCB industry, we boast of an on-time delivery a rate of over 99%. Moreover, our technical support is readily available (24/7/365) and ready to provide you all the necessary assistance. Visit us at https://www.rushpcb.co.uk/ and place your quote today .