Metal domes, also known as tactile domes or snap domes, are small metal components used in electronic devices and switches. They are typically made of stainless steel or other conductive metals and are designed to provide a tactile feedback or “click” sensation when pressed.

Metal domes have a dome-shaped structure with a dimple or convex top, and they are placed underneath the key or button of a device. When the key is pressed, the metal dome collapses, and the dimple in the center of the dome flattens. This action creates tactile feedback and an audible click sound, providing users with confirmation that the button press has been registered.

Metal domes are widely used in various applications, including mobile phones, remote controls, automotive controls, medical devices, and more. They are popular due to their durability, excellent electrical conductivity, and consistent tactile response. The size, shape, and actuation force of metal domes can vary based on the specific requirements of the application.