IN Brief:
- An AI processor supplier has selected Aehr's FOX-XP wafer-level burn-in equipment for evaluation at a Taiwanese OSAT.
- Installation is planned for early 2027, with further production orders dependent on subsequent validation.
- Aehr reported $33m quarterly revenue, $46.7m bookings, and effective backlog of $109.3m as of 1 November.
Aehr Test Systems has secured a new customer commitment for its FOX-XP wafer-level burn-in equipment, with a semiconductor supplier selecting a fully configured test cell for evaluation at a Taiwanese outsourced semiconductor assembly and test facility. The customer completed a benchmark programme during Aehr’s previous financial quarter and now plans to evaluate the same processor device in a production environment, with installation scheduled for early 2027.
The unnamed customer supplies AI accelerators, central processing units, and network processors. Its selection follows testing intended to establish whether the FOX-XP equipment can meet the relevant requirements for the processor under evaluation. The decision to acquire an initial test cell advances the programme towards production qualification, although it does not yet constitute a commitment to a wider manufacturing deployment.
Wafer-level burn-in applies controlled electrical and thermal stress to semiconductor devices before they are separated from the wafer and incorporated into packages. The process is intended to identify devices exhibiting early failures or unstable behaviour under defined conditions. Screening at this stage can prevent defective dies from progressing through subsequent manufacturing operations, where additional materials and processing can increase the cost associated with rejecting an assembled product.
Advanced AI processors can require complex packaging that combines several semiconductor components with dense electrical interconnections. The value of those assemblies makes early detection of defective dies particularly relevant. A fault discovered after packaging can affect a larger integrated structure, whereas a device rejected before assembly avoids at least part of the downstream manufacturing work.
Burn-in conditions must be matched to the semiconductor technology being tested. Temperature, electrical activity, applied voltages, and test duration influence the stresses experienced by the device. The selected programme must be capable of revealing relevant reliability problems while remaining within conditions appropriate to the device and its intended qualification requirements.
Aehr’s FOX-XP platform supports wafer-level testing through the company’s WaferPak contact technology. WaferPak contactors provide electrical connections to semiconductor devices while they remain on a wafer, allowing compatible products to undergo testing and burn-in before singulation. The company’s full-wafer contact technology supports wafers up to 300mm in diameter.
Achieving reliable contact across a wafer requires control of mechanical positioning, electrical connection quality, and thermal behaviour. Individual device pads must be contacted consistently while the equipment applies the relevant test conditions. Contact resistance, alignment, and temperature changes can influence the measurements, making the contact system part of the overall reliability-screening process rather than merely a way to connect the wafer to the tester.
The planned Taiwan installation will provide an opportunity to assess these functions within an outsourced assembly and test operation. Production environments introduce requirements involving wafer handling, equipment availability, test repeatability, and integration with established manufacturing procedures. The performance of the equipment must be evaluated alongside the requirements of the customer’s processor and the facility’s production workflow.
Aehr expects the customer to consider wider production adoption several months after installation and validation. The company has not identified the customer or the OSAT facility, and it has not disclosed a volume order covering additional FOX-XP systems under this programme. The confirmed development is the decision to purchase the initial test cell following successful benchmark testing.
The evaluation is separate from an existing AI processor production customer that has been expanding its wafer-level burn-in capacity. Aehr received a $22m follow-on order from that customer in August 2026, supporting additional FOX equipment and related testing resources. The earlier order belongs to an established production programme, whereas the newly disclosed Taiwan project remains at the qualification stage.
Aehr is also expanding its Sonoma package-level burn-in operations. The company reports shipping and installing more than a dozen Sonoma systems each month for a hyperscale customer’s first AI processor, while a second processor from the same customer has completed qualification on the platform. Follow-on orders are supporting initial production sampling, with a further production increase expected during 2027.
Package-level burn-in differs from wafer-level testing because the semiconductor has already been assembled into a package. Its external connections, thermal behaviour, and available test interfaces differ from those of an unpackaged die. Manufacturers can consequently apply reliability screening at different points in the production sequence according to the processor design, packaging method, and failure mechanisms they need to detect.
Demand across these two equipment categories contributed to Aehr’s financial results for the first quarter of fiscal 2027, which ended on 25 September 2026. Revenue reached a record $33m, an increase of 200% year on year and 75% sequentially. Quarterly bookings totalled $46.7m, producing a book-to-bill ratio of approximately 1.4.
The company’s backlog stood at $100.9m at the quarter end. Including additional orders received afterwards, effective backlog reached $109.3m as of 1 November 2026. These values refer to different reporting dates and should remain distinct. Aehr has raised its fiscal 2027 revenue outlook to $150m, compared with its previous guidance range of $130m to $150m.
Expansion in processor testing is occurring alongside opportunities involving silicon photonics and power semiconductors, where different device structures require specialised test conditions and electrical contact arrangements. Aehr reports prospective significant production programmes across more than a dozen customers, although individual evaluations must still progress through qualification before they can generate repeat equipment orders.
The selected FOX-XP test cell will move into the Taiwan facility in early 2027 if installation proceeds as planned. Subsequent validation will determine whether the customer adopts the equipment for higher-volume processor production, while Aehr continues delivering systems against its existing wafer-level and package-level manufacturing commitments.
