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Aehr Test Systems
Gayn Erickson runs Aehr Test Systems, which dominates the silicon carbide wafer burn-in node that every EV chipmaker must pass through.
Aehr Test Systems
Gayn Erickson has led Aehr Test Systems as CEO since 2012, steering the Fremont-based company from a general-purpose test equipment supplier into the dominant provider of wafer-level burn-in systems for silicon carbide semiconductors. Founded in 1977, the publicly traded firm (NASDAQ: AEHR) originally served the memory chip market before pivoting its proprietary test technologies to meet the extreme reliability demands of the electric vehicle supply chain. The company's flagship Fox-XP platform performs full-wafer contact burn-in and test of bare SiC wafers, identifying early-life failures before chips are diced and packaged — a step that saves automakers from catastrophic field failures in traction inverters. Onsemi, a top-tier power semiconductor manufacturer, has ordered multiple Fox-XP systems for its expanding SiC production lines in Hudson, New Hampshire and Bucheon, South Korea (per Aehr communications, 2023). The firm also supplies test systems for silicon photonics used in data-center interconnects and optical networking. Beyond the United States, Aehr maintains a direct presence in Japan, Germany, and Taiwan, the three geographies where the bulk of automotive-grade SiC device manufacturing is concentrated. Aehr reported roughly 88 employees at its fiscal year-end 2024, with the engineering-heavy team operating primarily from its Fremont headquarters. September 2024: The company announced its first major order for gallium nitride wafer-level burn-in systems, expanding its addressable market beyond silicon carbide and into the fast-charging and data-center power conversion segments (per the firm, September 2024). Aehr also operates a small equipment leasing program that allows customers to evaluate Fox-XP throughput before committing to system purchases, a model that has accelerated adoption at second- and third-tier device makers. The firm's structural edge is its installed base of Fox-XP systems inside the world's largest SiC producers — a position that drives recurring waferPak consumable revenue at margins above 50%. Since the Fox-XP operates at thermal and electrical stress levels that commodity testers cannot replicate, and since automotive Tier 1 buyers typically require that a specific burn-in platform be used and not changed across a vehicle program's life, Aehr's revenue stream from each cavity is locked in for multiple years of production.
General information
Firm type
Asset Manager
Year founded
1977
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Fremont
Corporate office
Fremont, CA, United States
Additional offices
Japan · Germany · Taiwan
Principals
Gayn Erickson
Chief Executive Officer
Sector focus
Frequently asked questions
Who runs investment decisions at Aehr Test Systems?
As a publicly traded corporation, capital allocation decisions are made by Gayn Erickson as CEO alongside the board of directors. Erickson has held the chief executive role since 2012 and has driven the strategic pivot toward silicon carbide test equipment that defines the company's current posture. The firm's R&D spend and capacity expansion plans are approved through standard corporate governance channels.
How does Aehr Test Systems source its equipment orders?
Aehr's customer relationships are deeply embedded in the semiconductor procurement cycle — automakers and Tier 1 suppliers specify the Fox-XP platform directly within their device qualification flows. The company also uses an equipment leasing program to seed adoption, allowing device makers to run production-validated output on a Fox-XP before committing to a multi-system purchase. Referral from existing customers within the tight-knit SiC ecosystem drives the majority of new business.
Is Aehr a single-family office or does it operate more like a venture firm?
Neither — Aehr Test Systems is a publicly traded industrial company (NASDAQ: AEHR) that designs, manufactures, and sells semiconductor test equipment. It is not an investment vehicle of any kind. The firm earns revenue from equipment sales and recurring consumable contracts rather than from portfolio company returns.
Does the wealth come from a single family or operating business?
There is no underlying family wealth. Aehr Test Systems generates its balance sheet through operating revenue from semiconductor manufacturers who purchase its wafer-level burn-in and test equipment. The company has been listed on public markets for decades and has no single-family controlling shareholder.
What is Aehr's known posture on acquisitions or external investments?
Aehr has historically grown organically by extending its Fox-XP platform into adjacent semiconductor materials like silicon carbide and gallium nitride rather than through acquisition. The company has not disclosed a dedicated corporate venture arm or M&A strategy, focusing internal capital on R&D for its core wafer-level test technology.
Which sectors does Aehr explicitly avoid?
Aehr does not participate in conventional packaged-part semiconductor test — that segment is dominated by large automated test equipment (ATE) players like Teradyne and Advantest. The firm also does not offer system-level test for consumer electronics or memory, having exited legacy memory burn-in markets to focus entirely on wafer-level reliability screening for wide-bandgap power semiconductors and silicon photonics.
How is Aehr different from other semiconductor test equipment companies?
Aehr's Fox-XP is one of the only commercially available systems capable of full-wafer contact burn-in at the temperatures and currents that silicon carbide requires — typically above 300°C across an entire 200mm wafer. Competitors like Teradyne and Advantest dominate packaged-part testing but do not offer a direct substitute for Aehr's wafer-level reliability screening, which occurs before dicing and prevents bad die from ever reaching a module.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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