What are the main design considerations when making a PCB?
October 29, 2018
Today, the largest use of PCBs around the world is like “motherboards” on computers that connect many of the computer’s critical electronics such as the CPU and memory unit, as well as providing connectors for hard, and other accessories.
There are three main elements:
A laminated board.
The components mounted on the board.
Traces that serve as “wires” connecting components and forming the circuit.
The actual components used depend entirely on the purpose of the circuit. Examine which components to use is best treated in a series. This leaves laminated boards and traces. The production costs, the working efficiency and the operational cost of the finished circuit depend on all these elements.
Copper is the most commonly used material for traits. Simple methods involve plating the entire plate with copper and then etching the unnecessary areas through a mask (stencil) to leave the required strokes. More complex methods allow traces to be added to a bare plate. Each approach has associated advantages and disadvantages.
Some boards require the use of gold for sensitive low voltage or lead free (RoHS) applications. Copper traces usually require the use of a layer of nickel barrier before bathing the gold. This prevents gold from migrating to copper. The indiscriminate use of nickel can result in huge impedance losses.
Today, as the computer’s memory needs increase, there is a great demand for PCB assembly services that many companies offer. The memory chips are placed on a separate printed circuit board to provide additional RAM (memory) for the computers. PCBs are also used as a power source in a wide variety of electronic devices, especially portable music equipment. Lastly, SIM cards and video or camera cards are actually both types of printed circuit boards.