The dome is also called the button shrapnel. The button shrapnel is made of ultra-thin (0.05mm-0.1mm thickness) and ultra-thick (generally higher hardness) stainless steel 301 or 304 materials. The button shrapnel is an important part of many switches, but with the development of science and technology, the use of the dome has also been applied to more fields. Bank POS equipment and ATM applications.

The dome sheet is generally used as the raw material of stainless steel plate sus301, and some users use the raw material of 304. The operating force is generally not less than 100gf, otherwise it is impossible to operate, and there is a certain rebound force, which can rebound as soon as it is pressed. The service life is generally 100,000 to 700,000 times. If the service life is exceeded, the spring sheet will be destroyed and lose its resilience, resulting in the inability to perform regular work.

In order to better improve the user's tactile feeling, Dergo has developed a unique function key for dome slices in order to integrate the needs of the customer's product structure. It can make the function keys of the dome and the product cover more precise, and the customer's experience of all equipment and its tactile value and comfort will be better.