PCB PADS  |  DOUBLE-SIDED PCB


What Type of Plating?
A variety of plating options are available depending on your specific application. Plating may vary depending on your requirements (life, contact resistence, etc). Contact Snaptron with questions about plating in your specific applications. ... more 
 
Snaptron’s sophisticated processes allow us to create custom domes and arrays with short lead times and minimal engineering charges.
Double-Sided Contact Pad (Suitable for all domes except oblong)


* Via hole offset to maximize center contact area                         *  Pattern shown is a keep-out area for any solder masks or films This drawing represents one of many possible layouts. Snaptron conveys this information for customer support with the intent that the customer will be responsible for final design of P.C.B. layout.
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Double-Sided PCB Pad (suitable for all dome styles except Oblong)
Metric Domes (in millimeter)

 Diameter  "D"  "I"  "P"  "F"
 4mm  4.76  3.00  1.70  0.32
 5mm  5.76  4.00  2.03  0.41
 6mm  6.76  5.00  2.54  0.41
 7mm  8.25  5.45  2.86  0.60
 8mm  9.27  6.73  3.20  0.60
 8.5mm  9.78  6.98  3.81  0.89
 9mm  10.27  7.48  3.81  0.89
 10mm  11.28  8.49  4.08  0.89
 12mm  13.27  10.18  4.90  0.89
 12.2mm  13.47  10.38  4.90  0.89
 12.7mm  13.97  10.83  4.90  0.89
 14.1mm  15.27  12.06  5.70  0.89
 20.2mm  21.90  18.09  7.00  0.89

    Standard Domes (in inches)

 Diameter  "D"  "I"  "P"  "F"
 .156"  .186  .126  .080  .016
 .220"  .260  .180  .100  .024
 .270"  .320  .220  .100  .024
 .350"  .400  .300  .150  .035
 .425"  .475  .375  .200  .035
 .500"  .550  .450  .200  .035
 .625"  .675  .575  .250  .035
 .750"  .825  .675  .300  .035
 1.00"  1.10  .900  .350  .035