Express Circuits Ltd - Printed Circuit Board (PCB)

Finish Type

Thickness

Application Use

Lead Free HASL

5-15 Microns

Lead Free Soldering

Tin Lead HASL

5-15 Microns

Lead Based Soldering
Military, Aerospace

Immersion Silver

0.2-0.3 Microns

Lead Free Solder
Alum Wire Bond
Touch Pads

Electroless Ni/Au

3-5 Microns Ni
0.05 – 0.15 Microns Au

Lead Free Solder
Alum Wire Bond
Touch Pads

Electroless Nickel/Pd/Au

3-5 Microns Ni
0.2-0.6 Microns Pd
0.02-0.1 Microns Au

Lead Free Solder
Alum Wire Bond
Gold Wire Bond

Electro-Plate Nickel & Hard Gold

3-5 Microns Ni
< 1.5 Microns Au

Surface Friction Contact

Electro-Plated Hard Gold

2.5-5 Microns Au

Edge Connector Contact

Electro-plate Nickel

up to 25 Microns

Hard Wear Contacts

OSP (Organic Preservative)

0.3 Microns

Soldering

Conductive Carbon Ink

Spec Type / Thk’s TBA

Touch Pad Surface Contact