# Aehr Test Systems **Source:** https://geo.sig.ai/brands/aehr-test-systems **Vertical:** Semiconductor Equipment **Subcategory:** Semiconductor Test **Tier:** Emerging **Website:** aehr.com **Last Updated:** 2026-04-14 ## Summary Aehr Test Systems (AEHR) reported ~$80M revenue in FY2024. Provides wafer-level burn-in and test systems for silicon carbide semiconductors used in EV powertrains and solar inverters. HQ: Fremont, CA. ## Company Overview Aehr Test Systems is a semiconductor test equipment company specializing in wafer-level burn-in and test systems, with a dominant position in testing silicon carbide (SiC) power semiconductors. Silicon carbide devices are essential components in electric vehicle inverters, solar inverters, and industrial power systems — they handle high voltages and temperatures where traditional silicon fails. Before shipping, SiC semiconductors must undergo burn-in testing at elevated voltage and temperature to screen out early-life failures, and Aehr's FOX-XP wafer-level system performs this screening more efficiently than component-level testing. Aehr Test Systems reported approximately $80 million in revenue in FY2024, having grown dramatically as EV adoption drove demand for SiC testing capacity. The company's wafer-level approach tests entire wafers of devices simultaneously rather than individual packaged parts, dramatically reducing test cost per device. Aehr's major customers include leading SiC suppliers Infineon, Wolfspeed, onsemi, and others who are investing billions in SiC manufacturing capacity to meet automotive demand. The company's technology creates a virtuous cycle with its dominant SiC market position: as SiC manufacturers expand production, they need more Aehr systems, generating both capital equipment revenue and recurring spare parts and service revenue. Aehr also serves compound semiconductor testing for photonic devices (data center transceivers), expanding beyond its core SiC franchise. ## Frequently Asked Questions ### What does Aehr Test Systems do? Aehr makes wafer-level burn-in and test systems that simultaneously test entire wafers of silicon carbide (SiC) semiconductors — used in EV inverters, solar inverters, and industrial power systems — screening out defects before packaging. ### Why is SiC testing critical? Silicon carbide devices operate under extreme conditions (high voltage, high temperature) in EVs. Early-life failures in the field are costly and dangerous. Burn-in testing screens for infant mortality defects before shipping, ensuring reliability for automotive-grade applications. ### What is Aehr's ticker? Aehr Test Systems trades on the Nasdaq under the ticker AEHR. ### What is wafer-level burn-in? Wafer-level burn-in tests all devices on a silicon wafer simultaneously (before they are cut and packaged), applying stress voltages and temperatures that reveal defects. This is more efficient than testing individual packaged parts and reduces overall cost-per-device tested. ### What is Aehr Test Systems' core product and why is it valuable? Aehr Test Systems' FOX-XP wafer-level burn-in system allows manufacturers to test and burn-in silicon carbide (SiC) power semiconductors while still in wafer form—before dicing and packaging. This approach significantly reduces the cost of testing compared to package-level burn-in and allows failing devices to be identified and removed before expensive packaging steps. SiC devices require burn-in to eliminate early-life failures that could cause EV inverter or power system failures in the field. ### Who are Aehr Test Systems' primary customers? Aehr's primary customers are silicon carbide semiconductor manufacturers supplying the EV, solar inverter, and industrial power markets. Major SiC manufacturers including onsemi (ON Semiconductor) are known Aehr customers. These manufacturers must test SiC wafers before packaging to ensure quality standards for safety-critical automotive applications where premature failure is unacceptable. ### What is the market outlook for Aehr Test Systems given EV adoption trends? Aehr's fortunes are closely tied to silicon carbide adoption in EVs—SiC inverters have become the dominant architecture for EV powertrain systems. As EV production scales globally, SiC demand (and consequently demand for Aehr's testing equipment) grows proportionally. The company faces cycles tied to EV production ramp-ups and ramp-downs, as customers expand test capacity in waves rather than linearly. ### What are Aehr Test Systems' competitive advantages? Aehr holds a near-monopoly position in wafer-level SiC burn-in testing, with no significant direct competitors offering the same approach. Its FOX-XP system's massively parallel testing architecture—burning in hundreds of wafers simultaneously—provides throughput advantages that make it economically superior to package-level alternatives. This technology leadership is protected by patents and years of customer qualification work that creates high switching costs. ## Tags hardware, manufacturing, public, b2b --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*