AEHR vs ONTO

Aehr Test Systems

Aehr Test Systems primarily designs, engineers, manufactures, and sells test and burn-in equipment for use in the semiconductor industry in the United States, Asia, and Europe. It provides full wafer contact test systems, test during burn-in systems, test fixtures, and related accessories. The company offers Advanced Burn-in and Test System family of packaged part burn-in and test systems, which perform test during burn-in of complex devices, such as digital signal processors, microprocessors, microcontrollers, and systems-on-a-chip, as well as individual temperature control for high-power advanced logic devices. It also provides FOX systems, which are full wafer contact parallel test and burn-in systems designed to make contact with various pads of a wafer simultaneously; WaferPak contactor that includes a full-wafer probe card for use in testing wafers in FOX systems; DiePak carrier, a reusable and temporary package that enables integrated circuit (IC) manufacturers to perform test and burn-in of singulated bare die or very small multi-IC modules; and test fixtures that hold the devices undergoing test or burn-in and electrically connect the devices under test to the system electronics. In addition, the company offers WaferPak Aligner, which performs automatic alignment of the customer's wafer to the WaferPak contactor; and DiePak Loader that performs automatic loading of the customer's modules to the DiePak carrier. Further, Aehr Test Systems provides customer service and support programs, including system installation, system repair, applications engineering support, spare parts inventory, customer training, and documentation services. It markets and sells its products to semiconductor manufacturers, semiconductor contract assemblers, electronics manufacturers, and burn-in and test service companies through a network of distributors and sales representatives. Aehr Test Systems was founded in 1977 and is headquartered in Fremont, California.

Onto Innovation Inc.

Onto Innovation Inc. engages in the design, development, manufacture, and support of process control tools that performs macro defect inspection and metrology, lithography systems, and process control analytical software worldwide. It offers process and yield management solutions, and device packaging and test facilities through standalone systems for macro-defect inspection, packaging lithography, probe card test and analysis, and transparent and opaque thin film measurements; and process control software portfolio that includes solutions for standalone tools, groups of tools, or factory-wide suites. The company also provides spare parts and software licensing services. Its products are used by semiconductor wafer and advanced packaging device manufacturers; silicon wafer; light emitting diode; vertical-cavity surface-emitting laser; micro-electromechanical system; CMOS image sensor; power device; RF filter; data storage; and various industrial and scientific applications. The company was formerly known as Rudolph Technologies, Inc. Onto Innovation Inc. was founded in 1940 and is headquartered in Wilmington, Massachusetts.