What is a Topre switch?
The Topre switch is a hybrid between a mechanical spring based switch, a rubber dome switch, and a capacitive sensor. Keypresses are sensed electrically without any physical circuit closure, which helps eliminate key bounce.
When a key is pressed, it connects with the capacitor pads and changes the capacitance at that specific point, which the keyboard identifies and registers as the exact keystroke. Keyboards with the Topre switch require only a gentle push to register a keystroke and offer satisfying 'bouncy' feel.