Structure: Made by FPC cooper foiled circuit

1.Top Layer: Autotype PET, textured PC, Gloss PC with matte finish, PVC

2:DOME Adhesive layer: 3M or other adhesive

3.Keys: embossed, rim emboss ,or flat Tactile type: 0.3-1.0mm

4.LED windows: clear or translucent ,colors transparent.
5.Button life time :100000 times to 1000000 times 

6.Dome: gold metal dome, very good tactile feeling( Nicomatic, nickel plated, gold plated).

7:Circuit layer: FPC(0.1mm-1.2mm),FPC circuit Thickness: 0.15mm-0.25mm

8.Backadhesive:3M467 or 3M468 or other 3M

9:Connerctor: ZIF connector or 2.54MM pin pitch female connector or FCI connector.

10.Total thickness:0.5mm-1.5mm, Also can be as per you request the thickness.

11:Customized designs are accepted

Electrical 
Maximum Circuit Rating 35V( DC)100mA 1W  

Rated current: 25-100mA, 0-30V DC

Rated voltage: <50V DC
Contact Resistance 10Ω~500Ω (depending on trace length & material used). 
Insulation Resistance 100MΩ at 100V DC 
Dielectric Withstand 250 V Rms (50~60 Hz 1 min.) 
Contact Bounce :5ms 

Insulation resistance:< 10mΩ, 250V DC
Life Expectancy Flat type     Five million closed  
Mylar type: 2 million closed

Mechanical features
Life expectancy: more than 1 million times
Actuation force: 120-350g
Tactile type:140-400g
Switch stroke: 0.5-1.0mm

Tail Flexibility : any angle within 360°

Environmental 
Operation Temperature Flat/metal dome: -40 °C to +80 °C 
Poly dome: -20 °C to +55 °C  
Storage Temperature Flat/metal dome: -40 °C to +85 °C  
Poly dome: -40 °C to +60 °C 
Humidity 40 °C , 90% ~ 95% for 240 hours 
Vibration 20 G's0 max(10-200 Hz,MIL-STD-202,M204,Condition B) 

Applications:

Medical Equipment

Telecommunications apparatus

Military industries

Household appliances

Security systems

Industrial controls and toys etc.