What Makes a Keyboard Mechanical? | Switches Explained

For the full breakdown, see our best Customizable Mechanical Keyboard guide.

That single detail—one physical switch per key—separates a mechanical keyboard from a standard membrane board. When you press a key on a mechanical keyboard, a stem pushes down against a spring until metal contacts touch and the press registers. Each key works independently, which is why mechanical boards feel distinct, last longer, and behave differently than the flat typing surface most laptops ship with.

What Separates Mechanical From Membrane Keyboards?

Membrane keyboards use a single flexible rubber or silicone layer that sits beneath all the keys. Pressing any key pushes that layer down to complete a circuit on a sheet below. Mechanical keyboards instead mount a separate switch unit under every keycap, and each switch contains its own spring and set of metal contacts.

That construction difference drives everything else you notice:

• Feel: mechanical switches provide consistent feedback across the whole board; membrane keys can feel mushy, especially around the edges.
• Durability: individual switches are typically rated for tens of millions of presses, far more than a membrane sheet.
• Repairability: a faulty mechanical switch can be replaced on its own; a broken membrane layer usually means a new keyboard.

Most people can feel the difference within a few keystrokes. Mechanical boards respond with a crisp, uniform action no matter where your finger lands.

What Are the Main Mechanical Switch Types?

Three switch families dominate the market, and each changes the typing feel. The switch type is the core spec to check before you buy.

Linear switches travel smoothly from top to bottom with no bump. They are the quietest mechanical option and favored by gamers who want fast, consistent presses.

Tactile switches produce a noticeable bump near the actuation point, so you feel exactly when the key registers without pressing all the way down. Typists often prefer this feedback.

Clicky switches add an audible click on top of the tactile bump. They deliver the loudest, most pronounced response of the three types.

Cherry MX is the most widely known switch family, and its spec numbers show how these categories translate into real behavior:

Actuation force, measured in centinewtons, tells you how hard you must press. Lighter switches like the Red at 45 cN feel feathery; heavier ones like the Black at 60 cN resist your fingers more.

Are Optical and Hall Effect Switches Mechanical?

Not in the traditional sense. Optical switches use a light sensor to detect a keypress, and Hall effect switches use magnets with software-adjustable actuation height. Both are popular in gaming boards and are often sold under the broad mechanical umbrella, but neither relies on the metal-contact mechanism that defines a classic mechanical switch.

The distinction matters for buyers. A Hall effect board lets you adjust how far a key must travel to register, which is a genuine advantage, but it may not support the same keycap or switch-swapping options as an MX-style board. Check the product page carefully rather than assuming compatibility.

The label itself is applied loosely across the industry. Corsair’s guide to mechanical keyboards notes that the term covers a range of switch technologies, and Lenovo’s glossary explains the construction differences between mechanical and membrane designs. Since the definition is not universally standardized, always confirm what a specific product actually uses.

If you are ready to choose, our roundup of the best customizable mechanical keyboards breaks down the top options by switch type, build quality, and hot-swap compatibility, so you can match a board to the typing feel you want.