embrane switch is a type of keyboard, which can be

touched lightly. It is a newly developed type of

electronic device. It has both the advantages of the

electronic machine products and the controlling system

of the electronic device. Membrane switch has many

characteristics, such as light and slim, dust-proof,

insulation, anti-shock and easy assembly. By virtue of

those features, membrane switch are extensively applied

in medical device, industrial control, home electronics,

and prec instrument industries etc.