Specifications

1) Material: Matte PC (smooth), gloss PC + matte oil, gloss PC, PET, and PVC

2) Embossed keys: No embossed keys and domes, domes without embossed keys etc.

3) Adhesive: 3M9448, 3M9080, 3M467, 3M468,

4)Specialize in manufactuing membrane keyboard switch:
   Overlay+circuit+LED+metal dome or poly dome array+connector+double side tape 
   EL backlight+Rubber keys
   Aluminum plate+Rubber keys
   Metal domes
   Flat without Tactile Effect
   Embossing with Tactile Effect 
   Embossing with Metal Dome
   Membrane Switch with FPC

 Performance indicators:

 1. Electronic characteristics
     Circuit rating: 35V (DC), 100mA, 1W
     Contact resistance: 10Ω --500Ω (According the trace length and materials to comfirm)
     Insulation resistance: > 100MΩ 250V DC 
     Contact bounce: ≤ 5ms Dielectric withstand: 250VRms (50-60Hz 1min)
     Life expectancy: Flat type ≥ 500 million times, tactile type: ≥ 100 million times
2. Mechanical Properties Actuation force: Flat type 57-284g (2-10 Oz), tactile type 170-    397g (6-14 Oz) Switch stroke: Flat type 0.1-0.5mm, tactile type 0.6-1.5mm
3. Environmental parameters
    Operating Temperature: -40 - +80, Storage temperature: -40 - +85 
    Humidity: 40, 90% -95%, 240 hours