VenkatP
Physician, Growth & Value Stock Investor
FormFactor's new Pharos optical probe series is important news and potentially a major re-rating enabler. Launched September 23 for silicon photonics and co-packaged optics testing, it combines low-loss coupling, precise alignment, automated calibration and repeatability in a single probe family, per another investor's summary. x.comÂ
FormFactor is a picks-and-shovels beneficiary of rising semiconductor intensity because AI makes chip testing more complex. Its advanced wafer test and probe products are critical for HBM, AI devices, advanced packaging and leading-edge nodes, where demand is growing structurally. Technically, it is in a clean Stage 2 uptrend above its 50- and 200-day averages, breaking to new highs on rising volume after a tight consolidation around $95-97. x.comÂ
FormFactor's production-ready wafer-level CPO probe gives it a test opportunity at a major foundry, but that business depends on one customer. CEO Mike Slessor says the CPO piece flows through a foundry worth 10% of sales; he did not name it, though an analyst named TSMC. Triton tests photonic wafers before stacking; post-stack test remains difficult. FormFactor expects CPO test revenue to significantly exceed $20m this year and estimates a $400m market by 2030. x.comÂ
Optical test suppliers benefit because CPO and NPO both need verified components. CPO needs screening before costly integration and checks after assembly; NPO modules must be known-good before installation. VCSELs change measurements, not the need for reliability checks. Broadcom's OCP slide shows 1,000+ fibers per chip package and automated testing. Avoid panic-selling FormFactor, Aehr, Keysight, Teradyne, Viavi, Advantest and Cohu; upside depends on adoption, volume and throughput. x.com x.com … Show more
Shorter qualification windows make transceiver testing a critical bottleneck for photonics, favoring Viavi, Aehr Test Systems, Cohu, FormFactor and Teradyne. Celestica's OCP slide shows windows falling from 36 months for 400G to 24 for 800G and 18 for 1.6T. With GPU architectures refreshing every 12 months and 224G per lane leaving little margin for error, laser fab capacity alone cannot match the silicon cadence without faster validation. 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
Optical test makers such as FormFactor, Aehr Test Systems and Viavi should keep growing whichever optical path wins, because every interconnect, pluggable, near-packaged or co-packaged, must be tested. Optical stocks plunged after a June report of CPO shipment delays, and engineers now point to a growing role for near-packaged optics and possible delays in some scale-up CPO. That shifts the question to who benefits as both grow, and testing is the bottleneck behind every other AI bottleneck. … Show more
FormFactor is rated Buy amid the AI sector crash because it is important for HBM, advanced packaging and CPO, where its testing raises yields. Foundry test intensity is only set to increase as production grows. x.comÂ
Coherent's 6-inch substrate access, yields and margin concerns look mostly like timing issues in the optical buildout. Coherent is now one of the preferred ways to gain exposure and should participate meaningfully, despite those constraints. x.comÂ
FormFactor sits in test and packaging, the best corner of semiconductors this year, where much quiet money is being made in the layer that makes compute functional. It makes the probe cards that test chips and ranks first globally in test subsystems. Last quarter set a revenue record, up 32%, with gross margin up 510 basis points to 49% and EPS beating by 33%. DRAM probe card revenue hit a record on HBM, a product sold out through 2030. x.comÂ
Aehr Test Systems has a proven lead in a test step AI optics needs but few can run at scale: high-power wafer-level burn-in for silicon photonics. Co-packaged optics makes it mandatory, since a chip failing after bonding scraps the whole switch, and newer devices need 2-4x more burn-in power. Bookings hit $37.2M, up over 500% in a quarter, at a book-to-bill above 3.5x. Goldman sees optical networking growing from about $15B in 2026 to $154B by 2028, and the test bottleneck forms first. x.comÂ
Pluggable optics have a new scaling path alongside CPO and NPO, supporting demand for light from Lumentum, Coherent and Applied Optoelectronics. Nvidia and Cisco's planned USFP packs 16 full-duplex 400G/lane connections into an OSFP-sized footprint, targeting four times the bandwidth density of 200G/lane modules while retaining replaceability. Volume-production timing and adoption remain unknown. x.com x.comÂ
