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AI supply chain term

Reticle limit

The reticle limit is the maximum area a lithography tool can print in a single exposure, which caps how large a single chip die can be.

What it means

The reticle limit is a hard physical ceiling in chipmaking: a lithography scanner can only project a pattern onto a fixed maximum area — the reticle field — in one exposure. That area sets the largest possible size for a single monolithic die. As AI accelerators demand ever more transistors and memory bandwidth, designers keep bumping into this ceiling, because they cannot simply make one chip bigger than the reticle allows. The industry's answer is to split a design into multiple smaller dies, or chiplets, and stitch them together with advanced packaging such as interposers and 2.5D/3D stacking. In the AI supply chain, the reticle limit is why packaging has become as strategic as the transistor itself: it forces the shift from single giant chips toward assembled, multi-die systems.

Why it matters to investors

The reticle limit is a core reason advanced packaging and chiplet capacity have become bottlenecks in AI hardware, shifting value toward the foundries and packaging houses that can assemble multi-die systems. Firms that control packaging and large-field lithography sit at that chokepoint.

See Reticle limit in the AI value chainIts live model score, why it matters, and every company exposed to it.

Companies on this part of the chain

TSMCTSMASMLASMLSMIC (Semiconductor Manufacturing International Corp.)0981.HK

Named to show where the term sits in the AI supply chain — research, not advice, and never a recommendation to buy or sell.

Related terms

ChipletA chiplet is a small, specialized silicon die that is combined with other dies in one package instead of building a single large monolithic chip.Advanced packagingAssembling compute dies and memory into a finished, working chip — a real capacity bottleneck.CoWoS (Chip-on-Wafer-on-Substrate)Chip-on-Wafer-on-Substrate — the advanced packaging that fuses compute dies and memory into one accelerator.DieA die is the small rectangular piece of processed silicon, cut from a wafer, that forms the actual working chip.

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THE ENTITY is an educational read on the AI supply chain — research, not investment advice. It explains how the chain works and who sits where, never price targets or buy/sell calls.