Dome Arrayse - EMI Printing

For EMI printing dome array (dome sheet), on top of the Mayler which carries snap dome contacts, silver paste or silver carbon paste is printed as ESD (Electrostatic Discharge Control). This helps reduce electrostatic which might be harmful to other parts inside of mobile phones. Electrostatic is gathered on the printed silver paste or silver carbon paste and neutralized.

EMI Single layer
-- EMI is printed on top of single-layer dome arrays (dome sheets)
EMI Double layer
-- EMI is printed on top of double-layer dome arrays (dome sheets)

Characters of EMI Dome Array:

  1. Strong applicability to the changeable climate
  2. With the infiltration of static the effect of protecting the loop happened.
  3. EMI printing has been adopted on current snap dome switch, and the priority of EMI  printing lies in controlling the impedance of printing surface below 1.0, which result in effect of revention to Hertzian waves and electrometer, in this way, the tone can be dealt with on the surface.
  4. Manufacturing engineering can be more difficult compared with the exist snap dome.
Structure of Dome Array
EMI dome array
EMI dome array
double EMI dome array
double EMI dome array
Technical Parameter of Dome Array:
Total Height: 0.28-0.45 mm
Travel: 0.13-0.30 mm
Scope of Force: 100-400 gf
Tolerance of Force: ±25 gf
Click Ratio: >30%
Life Cycles: >1 Million Cycles
Salt and Fog Examination: v35±2°C, 5±0.1%, 48H
Working Temperature: -20°C-50°C
Working Humidity: Under 100%RH
Touch Resistance: <1 ohm
ESD Resistance: <3 ohm
Dimension Tolerance: ±0.05-±0.15mm