# Lam Research One of the "Big 4" [[Semiconductor]] equipment makers — alongside [[ASML]], Applied Materials, and KLA Corporation — Lam Research dominates the etch and deposition steps of [[Semiconductor Fabrication]]. The company holds the number-one market share in etch equipment and a clear number-two position in deposition, making it indispensable to every advanced chip manufacturing process on earth. Every AI chip, every memory die, every leading-edge processor requires Lam's tools to carve and layer the nanoscale structures that define modern semiconductors. Founded in 1980 by David K. Lam and headquartered in Fremont, California, Lam Research employs approximately 19,700 people and invests $2.3 billion annually in R&D. The company reported record Q3 FY2026 revenue of $5.84 billion, contributing to annual revenue of $20.6 billion in calendar year 2025. President and CEO Timothy M. Archer has been bullish on 2027, citing demand driven by AI data center construction as the primary growth engine. ## Critical role in AI chip manufacturing Etch is the process of selectively removing material to create the intricate three-dimensional structures that make up a modern chip. Every [[NVIDIA]] GPU fabricated at [[TSMC]], every high-bandwidth memory stack from [[SK Hynix]] or [[Micron]], and every advanced logic chip from [[Intel]] or [[Samsung]] passes through Lam's etch chambers dozens or hundreds of times during manufacturing. As chip architectures grow more complex — more transistor layers, tighter pitches, novel 3D structures like gate-all-around — the number of etch steps per wafer increases, directly expanding Lam's addressable market. Deposition, Lam's second core competency, involves laying down the thin films of materials (metals, insulators, conductors) that form each layer of a chip. Combined, etch and deposition account for a larger share of total equipment spending than any other process step category, including lithography. Where [[ASML]] gets the headlines for its monopoly on EUV lithography, Lam quietly processes more wafer steps than any other equipment maker. ## Export controls exposure Like all US [[Semiconductor]] equipment companies, Lam Research is directly affected by [[Chip Export Controls]] restricting technology sales to China. China has historically been a significant revenue source for Lam, and tighter restrictions reduce the company's addressable market in the region. However, the same restrictions are accelerating capacity buildouts in allied nations — the US, Taiwan, Japan, and South Korea — partially offsetting the China headwind with demand driven by the [[CHIPS and Science Act]] and allied industrial policy. ## KB relevance Lam Research matters to the vault as one of the four equipment companies whose collective monopoly on semiconductor manufacturing tools gives the [[Chip Export Controls]] regime its enforcement power. Without Lam's etch and deposition tools, no fab can manufacture chips at scale. The company's revenue trends are a direct proxy for global chip manufacturing investment, and its geographic revenue split is a real-time measure of how export controls are reshaping the [[Semiconductor]] supply chain. Its growth trajectory, driven by AI data center demand, connects directly to the [[Defense Tech Ecosystem]] and [[Silicon Valley AI Ecosystem]] themes the vault tracks. ## See Also - [[ASML]] — fellow Big 4 equipment maker, lithography monopolist - [[Chip Export Controls]] — the restrictions reshaping Lam's market - [[TSMC]] — the foundry consuming the most Lam equipment - [[Semiconductor Fabrication]] — the manufacturing process Lam's tools enable - [[CHIPS and Science Act]] — the US policy driving domestic fab investment - [[Chipmakers Sector]] — the industry Lam serves