Applications of Electronic PCB Boards
PCBs are the essential building blocks for a broad range of electronic devices and systems. From consumer electronics like laptops and tablets to sophisticated medical devices and aerospace technology, printed circuit boards are an indispensable component of modern life.
A PCB is a piece of non-conductive material with copper traces and pads on it that form interconnections between the multiple electronic components soldered onto them. The traces can be single-sided, double-sided or multi-layered. The copper traces can be covered by a layer of non-conductive material called solder mask or left bare. The edges of the board are often drilled holes or cut with a tool to provide access for components to be connected to them and may have various features such as finger, v-score and mouse bites.
The basic construction of a electronic pcb board starts with a base, usually FR-4 fiberglass or a similar rigid board. It’s then coated with a layer of non-conductive epoxy or polyimide called solder mask to protect it from the chemicals used during etching and ensure that only the copper needed for the circuit is exposed.
Common Applications of Electronic PCB Boards
During the etching process, the copper is removed from areas where the circuit will not exist using an acidic solution such as alkaline. The mask is then soaked in a hot bath, leaving the copper behind that will eventually become part of the circuit. A pattern of dots called gridlines is usually left in places where no planes or traces exist to reduce the difficulty of etching, as it requires less time in the chemical bath. Depending on the complexity of the circuit, the copper traces may be made up of either continuous paths or interrupted by junctions.
Most home electronics such as televisions, stereo sets, DVD players and games consoles use PCBs. So do many office and workplace gadgets, such as computers and printers. Modern cars have PCB-based dashboards that connect the car to its music and radio equipment as well as passenger movie screens.
PCBs also play a critical role in aviation and aerospace technology. Fly-by-wire commercial aircraft, helicopter avionics, weapons targeting computers and flight control systems all depend on printed circuit boards to oversee operations and passenger safety. Avionics-grade applications require stringent weight, environmental and interference hardening specifications. They must operate under extreme shock and vibration conditions and endure decades-long dormant periods before activation to prevent failures that could jeopardize lives or geopolitical stability.
The military and defense industry relies on precision and fast communication. To support this mission, their equipment needs to be accurate and sensitive to changes in the environment, small and light enough for easy transport. They must also function reliably for decades in harsh deployment environments, withstand high levels of electromagnetic interference and be robust against abrasion. PCBs are essential for military-grade equipment, from ballistic hardware to encrypted communications infrastructure and image processing payloads. They also facilitate the delivery of vital information to field experts via mobile walkie-talkies, satellite navigation systems and other devices.
