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Fabless versus IDM: the old scorecard is incomplete
How ownership, outsourcing, and durable contracts distribute semiconductor manufacturing capital and risk.
Re-sourced edition. This explainer adapts the site’s educational material to the current claim registry. Material numbers appear only in the governed evidence cards below.
Three different questions
Fabless, foundry, and integrated-device-manufacturer labels describe organizational boundaries. They do not by themselves answer who finances scarce capacity, who has priority when supply tightens, or who absorbs inventory and commitment losses.
Reported CapEx is one lens
Owned PP&E and annual capital spending remain important. The research program adds commitments, prepayments, inventory, guarantees, and strategic investments without pretending those categories are economically identical.
Ownership is conditional
A competitive, utilized asset can create allocation, learning, and residual option value. An uncompetitive or underused asset can destroy value. The argument is about control of the right bottleneck, not ownership for its own sake.
Evidence
Claims supporting this explainer
The old CapEx-only proof of fabless capital efficiency is incomplete because material capacity exposure can appear as commitments, prepayments, inventory, guarantees, and investments.
Caveat. Do not state that every fabless company is more capital-intensive than every IDM.
The strongest semiconductor businesses own the bottleneck, finance it, or control it through contracts that survive scarcity.
Caveat. Editorial synthesis, not a quoted fact.
Purchase commitments are not automatically prepaid cash and should not be treated as economically identical to fab construction.
Caveat. Core caveat for all charts.
Intel is a caution, while TSMC is evidence that competitive, highly utilized manufacturing ownership can produce superior economics.
Caveat. Avoid claiming that all owned capacity creates value.