Printed Circuit boards are boards containing alternate layers of non-conductive and conductive material. Components vital to any electronic device, such as the diodes, resistors, conductors, semiconductors, etc., are all mounted on and communicate through the printed circuit board.
Types of printed circuit boards
Single-sided PCBs only have one side to mount electrical components as they only contain one conductive layer. They’re inexpensive but rarely seen in industrial devices. Double-sided/double-layer PCBs have conductive material on both sides. Components on either side of the board can be connected with through-holes. Multi-layer PCBs have three or more layers, all of which are conductive. They’re primarily used in complex electronic applications like GPS systems, data storage, etc. Rigid PCBs are made of tougher material (fibreglass) to prevent twisting. Flexible PCBs can fit into irregular or small enclosures. Rigid-flex PCBs combine the prod of flexible and rigid PCBs.
Components and material of a PCB
Each component of a PCB is made up of different materials depending on its purpose. The base material can be flexible or rigid according to the design of the PCB. Fibreglass is used for rigid sections, and flexible sections contain plastics such as polyimide or PEEK. Conductive pathways are made of copper and can be laminated on one or both sides. The solder mask, an insulating material, covers the conductive and substrate pathways to protect from accidental contact with other conductors. Although it is generally green, solder masks are also available in different colours such as white, red, and purple.
PCB mounting types
Threaded mounting types are the standard. It’s held in place with a nut and fixed into a thread, providing a better connection. Snap-fit is a type that quickly pushes into a hole or panel and provides secure mounting that can save you quite a bit of time during installation. Snap lock follows a similar mechanism but is easier to remove. Press-fit/blind-hole type has fins that hold on to bind holes. It is easier to use on applications that have space restrictions. Adhesive base type contains adhesive tape; it saves time, space, and effort by eradicating the need for mounting holes.
Points to keep in mind
No matter what type of printing circuit board you ultimately select, it is essential to heed some general aspects. Ensure the PCB fits the dimensions you’re looking for; some manufacturers provide custom sizing so you can get the exact size you require. Look out for the positioning of the holes and make sure that they’re appropriately drilled. Lastly, make sure board warping is at a minimum. All these features are what marks a PCB of high quality.
Categories Simillar to Printed Circuit Boards includes Breadboards