ASML

Lam Research

Applied Materials

Teradyne

Entegris

IPG Photonics

Kulicke and Soffa Industries

Axcelis Technologies

Photronics

Aehr Test Systems

KLA designs, manufactures, and markets process control, process-enabling, and yield management solutions for the semiconductor and related electronics industries worldwide. It operates through four segments: Semiconductor Process Control; Specialty Semiconductor Process; PCB, Display and Component Inspection; and Other. The company offers integrated circuit (IC) manufacturing products that comprises wafer inspection and review, and metrology; wafer and substrate defect inspection and metrology; reticle defect inspection and metrology; chemical/materials quality analysis; in situ process management and wafer handling diagnostics for IC and original equipment manufacturer (OEM) manufacturing; software products to provide run-time process control, defect excursion identification, process corrections, and defect classification; and refurbished and remanufactured products. It also provides specialty semiconductor manufacturing, benchtop metrology, surface characterization, and electrical property measurement services for general purpose/ lab applications; etch, plasma dicing, deposition, and other wafer processing technologies and solutions for the semiconductor and microelectronics industry. In addition, the company offers direct imaging, inspection, optical shaping, additive printing, and computer-aided manufacturing and engineering solutions for the PCB market; inspection and electrical testing systems to identify and classify defects, as well as systems to repair defects for the display market; and inspection and metrology systems for quality control and yield improvement in advanced and traditional semiconductor packaging markets. The company was formerly known as KLA-Tencor Corporation and changed its name to KLA in July 2019. KLA was incorporated in 1975 and is headquartered in Milpitas, California.