Fabless Model

A business model where a semiconductor company designs chips but outsources their physical fabrication to specialized third-party foundries.

The fabless model is a business strategy in the semiconductor industry where a company designs and markets microchips but outsources the actual physical manufacturing (fabrication) to specialized third-party factories known as foundries. This separation of design and manufacturing allows fabless firms to avoid the immense capital expenditures required to build, equip, and maintain modern silicon fabrication plants, which can cost upwards of ten billion dollars each. By focusing exclusively on research, development, and intellectual property, fabless companies can operate with a highly flexible cost structure. They typically generate higher return on invested capital (ROIC) and stronger free cash flow during industry upturns compared to capital-intensive integrated device manufacturers (IDMs) that own their own factories. For investors, the primary appeal of the fabless model is its high operating leverage and asset-light nature. However, the model introduces significant supply-chain risks. Fabless companies are highly dependent on foundry capacity allocations, leaving them vulnerable to production bottlenecks, rising wafer pricing from dominant foundries, and geopolitical risks concentrated around manufacturing hubs.

Company A designs a new AI chip and contracts a third-party foundry to manufacture the wafers. The foundry charges Company A $5,000 per completed wafer. If each wafer yields 500 usable chips, Company A's manufacturing cost is $10 per chip ($5,000 / 500). Company A then sells each chip to device makers for $50, capturing a gross profit of $40 per chip without owning any factory equipment.