PCB of mechanical gaming keyboard
This article tells you some knowledge about mechanical gaming keyboard internal PCB, helps you distinguish what a good PCB is.
What is PCB? PCB is abbreviation of “Printed Circuit Board”, which is an important electronic assembly and a carrier of electronic circuit with electronic components and parts . Because PCB is manufactured by electronic printing technology, so it is called “printed” circuit board.
Most of mechanical keyboard‘s PCB are double-sided, single-sided and multi-layer circuit boards are relatively less-frequently used for mechanical keyboard. How to distinguish among these PCB? a simple judging method is to see circuit traces on the PCB surfaces, single-sided PCB is with circuit traces on only one side while double-sided PCB is with circuit traces on both of its
two sides. As to multi-layer PCB, it’s impossible to be recongnized by only viewing the surface.
Single-sided PCB are the most basic PCB with circuit traces on only one side, single-sided PCB restricts some designs, circuit traces are not permitted to intersect each other. It’s applied in some early designs.
Double-sided PCB is with circuit wiring on both sides, circuit is connected between the two sides by vias, vias are those small holes which are full of metal or are surface-coated with metal, vias make the two sides of PCB electrically connected. Compare with a same size single-sided PCB, Double-sided PCB has double area for circuit wiring and solved the problem of wire-
intersecting restriction. Double-sided PCB is widely used for complex circuit now.
Multi-layer PCB is used to enlarge circuit wiring area, at present, double-sided PCB is widely applied in most mechanical keyboards, but there are still some companies use single-sided PCB for their cheap mechanical keyboards to save the cost. In fact, mechanical keyboard must depend on double-sided PCB to get high quality, excellent performance and advanced functions, for
example, it’s difficult to realize anti ghosting for all keys on mechanical keyboard with single-sided PCB.
You may see different colors of PCB, green PCB are popular in early time, and thereafter, blue PCB, brown PCB, black PCB and red PCB appeared. Different color of solder mask on the surface makes out different viewing color of PCB, solder mask nearly doesn’t matter PCB’s electrical performance, if there were some custom requirements about PCB color, manufacturers may use the solder mask with custom color on PCB accordingly.
There are many welding spots on PCB, a good welding spot should be conical and rich to ensure a stable electrical contact.
If the amount of solder tin on the welding spot were not enough, may be some problems would occur on mechanical keyboard when transporting or using. Empty solder or false solder may cause the welding spot not good-looking and be easy to loose or even induce problems of electrically poor contact.
Mechanical keyboard’s switches and LED lamps are assembled on the PCB, getting basic knowledge about PCB would help you maintain or reform your mechanical keyboard, for example, you may do it yourself when you need to remove and change the mechanical switches or LED lamps.