Page "Keyboard technology" Paragraph 11

A special case of the computer keyboard dome-switch is the scissor-switch.

The keys are attached to the keyboard via two plastic pieces that interlock in a " scissor "- like fashion, and snap to the keyboard and the key.

It still uses rubber domes, but a special plastic ' scissors ' mechanism links the keycap to a plunger that depresses the rubber dome with a much shorter travel than the typical rubber dome keyboard.

Typically scissor-switch keyboards also employ 3-layer membranes as the electrical component of the switch.

They also usually have a shorter total key travel distance ( 2 mm instead of 3. 5 – 4 mm for standard dome-switch keyswitches ).

This type of keyswitch is often found on the built-in keyboards on laptops and keyboards marketed as ' low-profile '.

These keyboards are generally quiet and the keys require little force to press.