Finishes
| Finish |
Thickness / µm |
Typical uses |
|---|---|---|
| Electroless Nickel / Immersion Gold | 3-5 Ni 0.1 max Au |
Soldering Aluminium wire bond Touch pads |
| Electroless Nickel / Electroless Palladium / Immersion Gold (Super or Universal finish) | 3-5 Ni 0.2-0.6 Pd 0.02-0.1 Au |
Soldering Aluminium wire bond Gold wire bond Touch pads Pogo pin contacts |
| Electroplated Hard (Tab) Gold | 2.5 pore free Au | Edge friction contacts All over friction contacts |
| Electroplated Soft Gold | 2.5 pore free Au | Soldering Aluminium wire bond Gold wire bond Touch pads Pogo pin contacts |
| HASL (63:37) | 15 | Soldering |
| Organic Solderability Preservative | 0.3 | Soldering |
| Electroless Nickel / Electroplated Hard Gold | 3-5 Ni 0.8 min Au |
Edge friction contacts All over friction contacts |
| Electroless Nickel / Electroplated Soft Gold | 3-5 Ni 1 min soft Au |
Soldering Aluminium wire bond Touch pads Gold wire bond Pogo pin contacts |
| Immersion Sterling Silver (Macdermid) | 0.2-0.3 Ag | Soldering Aluminium wire bond Touch pads |
| Immersion Tin (Atotech Stannatech) | >1 | Soldering |
| Carbon Key Pads | ||
| Palladium (with or without Silver or Nickel undercoat) | 4 pore free (1 if undercoated) |
Soldering Aluminium wire bond |
| Mixed finishes (enquire) | ||
N.B. Nickel finish is not suitable for circuits that are flexed or require press fit connectors, due to its brittle nature.