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Amkor Technology, Inc. provides outsourced semiconductor packaging and test services in the United States, Japan, Europe, the Middle East, Africa, and the Asia Pacific. It offers turnkey packaging and test services, including semiconductor wafer bump, wafer probe, wafer back-grind, package design, packaging, system-level and final test, and drop shipment services; flip chip scale package products for smartphones, tablets, and other mobile consumer electronic devices; flip chip stacked chip scale packages that are used to stack memory digital baseband, and as applications processors in mobile devices; flip-chip ball grid array packages for various networking, storage, computing, automotive, and consumer applications; and memory products for system memory or platform data storage. The company also provides wafer-level CSP packages for power management, transceivers, sensors, wireless charging, codecs, radar, and specialty silicon; wafer-level fan-out packages used in power management, transceivers, radar, and specialty silicon; silicon wafer integrated fan-out technology that replaces a laminate substrate with a thinner structure; leadframe packages for electronic devices and mixed-signal applications; and substrate-based wirebond packages used to connect a die to a substrate. In addition, it offers micro-electro-mechanical systems packages that are miniaturized mechanical and electromechanical devices; and advanced system-in-package modules used in radio frequency and front end modules, basebands, connectivity, fingerprint sensors, display and touch screen drivers, sensors and MEMS, and NAND memory and solid-state drives. Further, the company provides wafer, package, and system level test services, as well as burn-in test and test development services. It serves integrated device manufacturers, fabless semiconductor companies, original equipment manufacturers, and contract foundries. The company was founded in 1968 and is headquartered in Tempe, Arizona.

IPG Photonics Corporation develops, manufactures, and sells various high-performance fiber lasers, fiber amplifiers, and diode lasers used in various applications primarily in materials processing worldwide. Its laser products include hybrid fiber-solid state lasers with green and ultraviolet wavelengths; fiber pigtailed packaged diodes and fiber coupled direct diode laser systems; high-energy pulsed lasers, multi-wavelength and tunable lasers, and single-polarization and single-frequency lasers; and high-power optical fiber delivery cables, fiber couplers, beam switches, chillers, scanners, and other accessories. The company also offers integrated laser systems; LightWELD, a handheld laser welding system; 2D compact flat sheet cutter systems and multi-axis systems for fine welding, cutting, and drilling; welding seam stepper and picker, a fiber laser welding tool; high precision laser systems; specialized fiber laser systems for material processing applications; robotic and multi-axis workstations for welding, cutting and cladding, flatbed cutting systems, and diode markers; and laser and non-laser robotic welding and automation solutions. It serves materials processing, communications, medical procedures, and advanced applications and communications markets. The company markets its products to original equipment manufacturers, system integrators, and end users through direct sales force, as well as through agreements with independent sales representatives and distributors. IPG Photonics Corporation was founded in 1990 and is headquartered in Marlborough, Massachusetts.

Power Integrations, Inc. designs, develops, manufactures, and markets analog and mixed-signal integrated circuits (ICs), and other electronic components and circuitry used in high-voltage power conversion worldwide. The company provides a range of alternating current to direct current power conversion products that address power supply ranging from less than one watt of output to approximately 500 watts of output for mobile-device chargers, consumer appliances, utility meters, LCD monitors, main and standby power supplies for desktop computers and TVs, LED lighting, and various other consumer and industrial applications, as well as power conversion in high-power applications comprising industrial motors, solar and wind-power systems, electric vehicles, and high-voltage DC transmission systems. It also offers high-voltage diodes; InnoSwitch IC for electric vehicles; high-voltage gate-driver products used to operate high-voltage switches, such as insulated-gate bipolar transistors and silicon-carbide MOSFETs under the SCALE and SCALE-2 product-family names; and SCALE-iDriver for use in powertrain and charging applications for electric vehicles. In addition, the company provides motor-driver ICs for use in refrigerator compressors, ceiling fans, and air purifiers, as well as pumps, fans, and blowers used in consumer appliances, such as dishwashers and laundry machines. It serves communications, computer, consumer, and industrial markets. The company sells its products to original equipment manufacturers and merchant power supply manufacturers through direct sales staff, as well as a network of independent sales representatives and distributors. Power Integrations, Inc. was incorporated in 1988 and is headquartered in San Jose, California.

Wolfspeed, Inc. operates as a powerhouse semiconductor company focuses on silicon carbide and gallium nitride (GaN) technologies in Europe, Hong Kong, China, rest of Asia-Pacific, the United States, and internationally. It offers silicon carbide and GaN materials, including silicon carbide bare wafers, epitaxial wafers, and GaN epitaxial layers on silicon carbide wafers to manufacture products for RF, power, and other applications. The company also provides power devices, such as silicon carbide Schottky diodes, metal oxide semiconductor field effect transistors (MOSFETs), and power modules for customers and distributors to use in applications, including electric vehicles comprising charging infrastructure, server power supplies, solar inverters, uninterruptible power supplies, industrial power supplies, and other applications. In addition, it offers RF devices comprising GaN-based die, high-electron mobility transistors, monolithic microwave integrated circuits, and laterally diffused MOSFET power transistors for telecommunications infrastructure, military, and other commercial applications. The company was formerly known as Cree, Inc. and changed its name to Wolfspeed, Inc. in October 2021. Wolfspeed, Inc. was incorporated in 1987 and is headquartered in Durham, North Carolina.