5 Cool Facts about Printed Circuit Boards That You are NOT Aware of!


  • Who invented PCB?

The PCB was invented by Paul Eisler, an Austrian inventor. Eisler developed the first PCB when working on a radio set in 1936. Although, the mass use of PCBs was not popular until after the 1950s, and their popularity increased tremendously from there.


  • PCBs designed using CAD

A lot of people are not aware that PCBs are designed using CAD, or computer-aided design. Technicians use CAD programs to design both the schematic and the layout of the PCB. It also makes it feasible for testing of the board possible while checking that all the traces are properly connected before the printed circuit boards (PCBs) are physically made.


  • Surface mount technology

Surface mount technology (or SMT) is the most commonly used manufacturing technique to make modern PCBs. SMT became widely used in the 1980s and quickly replaced older the through-hole method. SMT components sit on top of solder paste (with the consistency of butter) upon copper pads on the PCB’s surface. Solder paste is turned into a solder joint by reflowing (heating and melting) the tin paste into a solid metallic connection.


  • PCBs are getting smaller

With the evolution of technology, manufacturers were determined to produce smaller electronics as well as printed circuit boards (PCBs). Surface mount designed PCBs are up to one-tenth of the size of through-hole circuits. The reduction in the size of the PCB is going to continue.


  • The technology is always changing

PCB technology is always evolving. PCBs are never static; the technology is always developing. With transient technology, size of PCBs has become smaller & smaller. The most recent innovation is “Biodegradable PCB”. Completely biodegradable printed circuit boards (PCBs) have been developed using biocomposites made from natural cellulose fibers extracted from banana stems and wheat gluten, which are normally considered as agricultural wastes or coproducts.