Electronics LCA: chip fabrication, critical raw materials and the use stage

Electronics is where mass intuition misleads most in life cycle assessment. Most of a laptop's mass is casing, battery and display; but the densest part of its embodied carbon sits in integrated circuits weighing a few grams.

The intensity of semiconductor fabrication

Chip fabrication runs to hundreds of steps requiring ultra-pure materials and an extremely controlled environment. Cleanroom ventilation runs continuously, ultra-pure water production takes energy, and some process gases have very high global warming potentials. Releasing those gases — perfluorocarbons, NF₃, SF₆ — without abatement can dominate a fab's footprint.

As a result, the production footprint of an advanced processor per gram is beyond almost any other industrial product. That also tells you where design decisions should focus in electronics: reducing component count and die area matters far more than changing the casing material.

Critical raw materials and resource indicators

Electronics draw on a wide span of the periodic table: indium, gallium, tantalum, cobalt, rare earths. Most come from low-grade ores, at high energy cost, from geographically concentrated sources. The GWP indicator does not capture that dimension; the abiotic resource depletion indicator exists for it.

• The resource depletion indicator does not rank the same as GWP — read them together
• Supply risk is a dimension separate from environmental impact, and LCA does not measure it
• Recovery rates remain very low for most critical elements
• Mining-related toxicity impacts vary widely by region
• Data quality is typically weak on these lines; uncertainty should be reported explicitly

The use stage: weight varies by device

The use stage's share varies widely with the device's power draw and lifetime. In a smartphone, production dominates because consumption is low. In a server or desktop workstation, years of continuous operation bring the use stage forward and the carbon intensity of the electricity mix becomes decisive.

The value of extending life

In a production-dominated product group, extending life is the single strongest abatement lever. Moving service life from four years to six cuts annualised production impact by a third — a gain no material optimisation can match. Repairability, software support duration and spare part availability are therefore environmental parameters.