Membrane keys are the basic structure of "key + membrane", so the feel and characteristics of keys depend on the design of membrane keys. Considering the reliability of switch contact separation and rebound, the thickness of the film is generally 0.125-0.2mm, which is too thin, weak rebound and insensitive to contact separation. The film button is too thick and slow to respond, increasing the operation force.

When the key body is large, such as the diagonal length of square key or the diameter of circular key is greater than 12mm, 0.15 or 0.2mm thick film shall be selected. The film is slightly thicker and rebounds strongly. After the key body is pressed for many times, the film relaxation tendency is small, so as to ensure the normal operation of the contact.

When the isolation layer is thinner, the film thickness of the circuit substrate should be thicker. Too thin film is prone to contact self continuity. It is allowed to select a thicker film material for the plane keys in the electronic assembly factory. Generally, the film used for circuit contact bubbling should be 0.125mm thick. A thicker film should be used only when the bubbling ball diameter is large and the chord height of the ball top is small.

Thin film key is a necessary component structure in electronic key products. It is the built-in conductive film of metal spring key products and conductive adhesive key products. The role of thin film key is to play the role of switch conductivity in key products. It is commonly used as a conductive sheet on PCB and FPC circuit board. The structure of the membrane key is very simple. After directly removing the contact key cover and key cap, you can see the membrane circuit and circuit board under the key.

If you choose the membrane switch or related products of electronic assembly manufacturers, you can see the product details provided by TEDA membrane switch manufacturers. You are welcome to call at any time.

Dongguan Taida membrane switch factory is a professional membrane switch factory, which is a supplier of membrane panels, silicone keys, nameplate labels, LCD, touch screen, PCBA and electronic project assembly and processing