When it comes to the contact resistance of silicone keys, many friends may not know what it is. In fact, it refers to the resistance value of conductive particles on the back of silicone keys,

For conventional conductive particles, it is normal within 500 Ω. Of course, it is OK if the requirements are lower. This needs to start from the conductive process of silicone key design.

At present, the conductive processes of silicone keys are divided into the following types: conductive ink, metal conductive particles (silver particles, gold particles, etc.), carbon particles, conductive silicone rubber (aluminum silver conductive particles, carbon nickel conductive particles). Among the above conductive processes, the most common conductive methods are conductive ink and carbon particles.

The contact resistance of silicone key conductive ink is within 500Ω, the contact resistance of carbon particles is within 100 Ω, while the contact resistance of metal conductive particles and conductive silicone rubber is within 1 Ω,