Keyboard PCB/PCBA - KingSheng PCBA

What is a Keyboard PCB?

The keyboard PCB (Printed Circuit Board) serves as the central nervous system of a mechanical keyboard.  Essentially, it is a thin electrical circuit board embedded within the keyboard that determines how the switches function and communicate with the computer.  The main role of a keyboard PCB is to log keystrokes and send this information in a format that the computer can understand, ensuring that each keypress is accurately reflected on the screen.

While membrane keyboards rely heavily on PCBs, it is particularly important for mechanical keyboards due to their more robust and customizable construction.  Most mechanical keyboard PCBs use a matrix design, which is grid-like and connects rows and columns of switches to identify which key has been pressed.  The type of PCB chosen can significantly affect the typing experience, especially in terms of customization options.

The effectiveness of a keyboard PCB enhances both the efficiency and overall user experience of a mechanical keyboard.  It also plays a crucial role in the feel and quality of the typing experience.  So, what is a keyboard PCB?

In simple terms, a keyboard PCB is the component used in mechanical keyboards to connect key switches and other elements to the computer.  It acts as an electrical pathway that facilitates communication between the keyboard and the computer.

Key switches are just one of the components found on a keyboard PCB.  Other features may include capacitors, resistors, and diodes.  These components contribute to various functionalities such as macro support, programmability, interpreting keystrokes, and LED lighting.

How do keyboard PCBs work?

Key switches on keyboard PCBs link mechanical keyboards to computers. This ensures smooth communication between the two entities. Metal contacts join the key switches to the PCB. These contacts close whenever a user presses the keys. Once the PCB notes the connection, it registers it as a keystroke. Then the digital signal goes to the computer.

How many layers is a keyboard PCB?

The number of layers will depend on the features of the keyboard PCB and its specific design. Basic keyboard PCBs have two layers. The uppermost layer has the traces and components, while the layer at the bottom has a ground plane. Many keyboards use this basic arrangement, allowing diodes, key switches, and all other essential components to fit perfectly.

Types of Keyboard PCB

Hot-Swappable Keyboard PCB: Hot-swappable keyboard PCB is literally a game-changer for those customization enthusiasts. This kind of PCB allows a user to replace switches without bothering to disassemble the keyboard or soldering. Whether the types are experimentally tried for tactile feedback or different mechanical switches based on mood, the PCB really makes the switch very convenient and stress-free.

Flex Keyboard PCB: These are different from other PCBs in design. They are flexible and can bend or fold to fit inside very compact or non-traditional keyboard designs. They are extremely resilient and resistant to vibrations, making them the ideal solution for portable or nonstandard keyboard PCB layouts. They are thus being widely used in industrial and commercial applications where durability is paramount.

Gaming/RGB Keyboard PCB: No-brainers for bright graphics, RGB-enabled gaming keyboard PCBs usually are LED-infused boards. They generate millions of colors and can be breathtakingly gorgeous in lighting effects, looking to amplify the feel of your game night. Most RGB keyboard PCB boards come along with software suites so that users can actually alter lighting patterns synchronized by the key strips and beats.


At KingshengPCBA, we are always ready to assist our clients in tackling their PCB and PCBA needs.  With years of experience in this industry, you are guaranteed nothing short of quality and outstanding services.