Lam Research is a global supplier of wafer fabrication equipment and aftermarket services to semiconductor manufacturers worldwide. The company's core business revolves around three primary equipment categories—deposition systems that build material layers using techniques like chemical vapor and atomic layer deposition, etch systems that selectively remove materials to form chip features, and clean systems that remove particles and contaminants between manufacturing steps—along with a customer support business offering maintenance contracts, spare parts, upgrades, and productivity optimization solutions. Revenue comes from both equipment sales and aftermarket services, with customers comprising leading memory, foundry, and integrated device manufacturers serving end markets including cloud computing, artificial intelligence, and mobile devices. Lam differentiates through deep expertise in deposition, etch, and clean processes, close collaboration with customers, feedback from a broad installed base, and a diversified portfolio addressing technology trends such as 3D architecture and advanced packaging.