Industrial Gold / Electronics
Also: Technology Gold, Electronics Gold, Industrial Gold
Industrial gold refers to gold used in technical applications – especially in the electronics industry – rather than for investment or jewellery.
Gold is commonly regarded as an investment and jewellery metal – yet around 7 to 8 percent of global gold demand goes to technical applications. Of these, the electronics industry dominates, deliberately exploiting the metal's unique physical properties: excellent electrical conductivity, absolute corrosion resistance and almost unlimited ductility. The current gold price largely determines how intensively manufacturers search for substitutes or turn to recycling.
Why Gold in Electronics?
Gold does not oxidise even under extreme conditions, forms no insulating surface layer, and thus ensures permanently reliable electrical contacts – a property no other economically available metal offers in the same way. The most important fields of use at a glance:
| Application | Form | Typical gold content |
|---|---|---|
| Circuit boards / PCB | Electroplated gold (contact surfaces) | 0.05–2 µm layer thickness |
| Bonding wire (chip connection) | Ultra-fine wire 99.99% Au | 15–50 µm wire diameter |
| Connectors / contacts | Plating or clad material | 0.1–5 µm |
| Semiconductor packaging | Solder alloys (Au-Sn, Au-Ge) | 80% Au in special alloys |
| Infrared reflectors / sensors | Vapour deposition, sputtering | microgram range |
Bonding Wire – the Most Important Single Segment
Gold bonding wire connects the integrated circuit (die) to the package frame. It must be extremely thin (from 15 µm), high-purity (999.9) and mechanically stable. Although the industry has increasingly switched to cheaper copper and silver bonding wires since the 2010s, gold remains the standard in high-reliability applications (automotive, medical technology, aerospace) – wherever failure is not an option.
Electroplated Gold (ENIG / HASL-Au)
On circuit boards, gold is usually applied as Electroless Nickel Immersion Gold (ENIG): a wafer-thin gold layer (approx. 0.05–0.12 µm) over a nickel barrier protects the solder contact surfaces from oxidation and ensures good solderability. The amount of gold per board is tiny – but across billions of circuit boards worldwide it is considerable.
Urban Mining: Recovery from Electronic Waste
Because the amounts of gold used per device are small, recovery only pays off on an industrial scale. Nevertheless, a tonne of old circuit boards contains an estimated 200 to 400 grams of gold – considerably more than a tonne of average gold ore (typically 1–5 g/t). This makes recycling from electronic waste (urban mining) an important secondary supplier.
Melt value of electronic scrap (simplified):
gold quantity [g] × current gold price [£/g] = metal value [£]
→ Calculator: /uk/calculator/melt-value/
The melt value can be calculated online once the gold content of the scrap is known – for example from an analysis report by the refinery.
Palladium and Platinum Group Metals as Companions
Alongside gold, palladium and other platinum group metals also play an important role in electronics: palladium is found in multi-layer ceramic capacitors (MLCCs), which are built into practically every electronic device. The price movements of both metals are therefore closely linked to global electronics production.
Price Influence and Substitution Effect
If the gold price rises sharply, manufacturers intensify the search for alternatives (copper or silver bonding wire, thinner layers) or reduce the gold content in alloys. This substitution pressure dampens industrial demand and distinguishes it from investment demand, which tends to increase at higher prices. The historical price trend illustrates how strongly this effect was pronounced in high-price phases (e.g. 2011–2012, 2020).
In Brief
Industrial gold in electronics is a small but technically indispensable segment of the gold market. The combination of corrosion resistance, conductivity and workability makes gold the first choice wherever reliability matters more than material cost. Through scrap gold recycling and urban mining, a growing share of the processed electronics gold flows back into the cycle.