Membrane Switch Design

Membrane Switches is a overall sealed structure by using plane multi-layer combination. Membrane Keyboard is a kind of new electronic components with the technology of light, mechanic and electronics which seal together by the key switch, panel, marking, symbol display and liner.It is a set of key functions, indicating components, instrument panel,consisting of the panel, top circuit, isolation layer, floor circuit. When you press the membrane switch, the contact on the circuit downward deformation, contact with the floor circuit plate conduction; When releasing finger, the top circuit contacts bounce back, the circuit is disconnected, the circuit triggers a signal. 

Membrane Switches Panel is a kind of plastic which uses a rigid or flexible printed circuit board as the substrate, a feel or no touch keys on installation, and then covered with color printing decorative patterns. The switch circuit and the machine can be connected by welding or plug.

Membrane Switches & Membrane Keypad Advantages 
Good waterproof, dustproof, anti-oil, anti-harmful gas erosion, stable and reliable performance, light weight, small size, long life, easy assembly and the panel can be washed without damage. And membrane keyboard is in rich colors, nice.
Membrane Switch is a change in the appearance of fundamental structure of electronics, it can replace the conventional discrete components of the keys , more reliable implementation of the task of the operating system.

Structure of membrane keyboard            

It depends on the application requirement, a membrane

Graphic Overlay Materials for Membrane Switches & Keyboard

PVC Membrane Keyboard:                                                                             

shiny side; stability for acid, alkali and salt at room 

temperature. Good wear resistance, self-extinguishing flame,

muffler shock, electrical insulation. Thermal stability is poor. 

It is usually used in low common signs, panels.

PC Membrane Keyboard: 

shiny side;high transmittance , low water absorption, good 

dimensional stability, bending, tensile, excellent compressive 

strength, heat resistance, cold resistance, electricity Insulation 

and good resistance to atmospheric aging. Poor chemical 

resistance, and fatigue resistance, easy to produce stress open crack.

PET Membrane Keyboard:                                                                                

shiny side; good chemical resistance, insoluble in common               

organic solvents, not alkali resistance. Has excellent mechanical 

properties,electrical properties rigidity, hardness and the largest 

thermoplastic strength and toughness, low water absorption, 

excellent wear resistance ,friction resistance , high dimensional 

stability. Tensile strength can be comparable with the aluminum 

film, much higher than the PC, PVC. The PET has texture. It is 

more expensive. PET is the best substrate in producing membrane 

switching circuit . One of the textured PET is suitable for products 

which has higher requirement on products surface or have a liquid 

crystal display window.

There are two ways of forming surface characters

                            1. Silk Screen Printing.                                                    2. Laser Cutting.   

How to silk screen print membrane switches, membrane keyboard, membrane keypad graphic overlay.

Membrane Switches & Keyboard Applications