CK Capital
Defense/Space/Tech/Photonics Investor, Co-Owner of CV Research
FormFactor and Aehr Test Systems are favored because testing is the one non-optional part of the AI buildout. A single bad die ruins the whole package, so pricier chips mean more testing. FormFactor's probe cards touch every wafer; Q2 set records above a $1B run rate with gross margin over 50%, HBM4 is two-thirds of DRAM revenue and a new GPU program ships this half. Aehr guides fiscal 2027 revenue up 160-200% to $130-150M on a record backlog, plus a $22M AI follow-on order. x.comÂ
Testing and packaging companies such as Amkor, FormFactor, Teradyne and Onto Innovation get paid no matter whose AI chip wins, because every custom XPU must be tested and packaged before it ships. Broadcom guided to $115B of AI revenue next year and $230B the year after, with six customers committing gigawatts of custom silicon through 2028. Amkor is the only US advanced packager at scale, with a $1.5B NVIDIA prepayment; FormFactor's revenue rose 32%, and tests per chip rise each generation. x.comÂ
Aehr Test Systems stands to benefit because testing is a bottleneck to scaling AI chips. Testing demand is about to surge. Investors did not question its price-to-sales ratio at 120, despite the current P/S objection. x.com x.comÂ
FormFactor is evolving from an HBM probe-card play into a broader AI test platform as Nvidia emerges as a new logic-test market. Per Deutsche Bank, becoming a second source for Nvidia GPU probe cards at TSMC could reach $200M+ revenue by 2028, alongside about $400M of HBM revenue and a roughly $200M custom ASIC opportunity. Micron's print shows HBM demand exceeding supply, and taller, denser stacks make wafer-level testing more valuable. Valuation is the main risk after a 274% one-year rise. … Show more
Aehr remains a concentrated, expensive way to own wafer-level photonics burn-in: its 10-K says silicon-photonics customers primarily drove that revenue growth, and FY2027 guidance of $130m-$150m could nearly triple FY2026 sales, yet shares value it at about 20x the guide. Teradyne's acquired photonic-chip test business is not material to its much larger sales; Aehr's top five customers provided 70% of FY2026 revenue, so orders matter more than the headline CPO opportunity. x.comÂ
Aehr Test Systems has become a key picks-and-shovels supplier to the AI chip boom, with its Sonoma platform the go-to system for reliability testing of high-power AI processors. On April 16, 2026, it announced a $41M follow-on order, its largest ever, from an unnamed hyperscale AI chip leader for custom AI ASIC testing, with revenue from fiscal 2027. Backlog doubled to $38.7M, second-half FY26 bookings exceed $92M, and FY26 should hit the high end of $45-50M guidance. x.comÂ
Reported advanced-testing price increases could boost AI chip-testing suppliers. Dan Nystedt cites media reports of prices set to rise 10-30% as supply falls far short of demand. ASE Technology, FormFactor and Cohu have explosive earnings-growth estimates and some of the strongest technical charts with relative strength; AI chip testing still has good upside potential. x.comÂ
Aehr Test Systems is a case of narrative running ahead of the numbers. The bull case is reasonable: a young company with a strong position in silicon carbide burn-in, genuine hyperscaler interest in AI chip burn-in and room to expand into memory and logic. But the latest quarter showed revenue down 43% year over year, with no meaningful order conversion from the AI opportunities yet. Until revenue improves and orders come through more clearly, the story stays ahead of the fundamentals. x.comÂ
Aehr Test Systems' lead hyperscale customer is expanding production with about $6M of follow-on Sonoma orders for a second-generation AI processor. These are production-capacity orders, not evaluations, and the customer expects the second processor eventually to exceed the volumes of the first, already in high-volume production. Teradyne's new burn-in on Titan HP overlaps only with package-level Sonoma work, not FOX-XP wafer-level burn-in that screens dies before costly CoWoS packaging. x.comÂ
Aehr Test Systems' wafer-level burn-in is turning from a niche silicon-carbide test into an indispensable, high-margin bottleneck for AI accelerators. As AI chips grow denser and add multi-die HBM stacks, testing dies before costly advanced packaging prevents heavy yield losses from early failures. Aehr won a $22 million follow-on order for FOX XP systems from its primary AI processor customer, shipping to Taiwan over six months, while running benchmarks for more chipmakers and hyperscalers. … Show more
Aehr Test Systems is growing fast across several verticals, with its lead AI processor customer placing another $22M follow-on order for wafer-level burn-in systems. The tiny company is expanding into memory and silicon photonics as well, and at about $1.1B market cap it looks extremely promising, resembling an early Teradyne. x.comÂ
Tight memory supply keeps the AI memory supplier trade in bill-of-materials names if it persists. The investor aleabitoreddit reports an SK hynix shortage outlook through 2030 and an operating-margin result near 80%. HBM allocation and average-selling-price guidance are the next tests; Korea has already priced the earnings print, so the next move depends on who locks capacity. x.comÂ
