SK hynix hands Onto Innovation its sole technology award as RBC sizes $30 billion of equipment spending

SK hynix▼−2.69% — SK hynix, down 2.69 percent today chief executive Noh-Jung Kwak handed one supplier, Onto Innovation▼−7.10% — Onto Innovation, down 7.10 percent today, the sole technology award at his Partners Day on September 28: the Massachusetts process-control company's Dragonfly G5 finds hidden cracks in high-bandwidth memory stacks before bonding turns a 16-die package into scrap ¹². Onto announced it on October 12↗ with no contract value, and SK hynix has posted no notice of its own ². The prize establishes that SK hynix depends on the tool, not what it has bought.

Why the yield fight moved to the inspection line

Every generation of high-bandwidth memory, the stacked DRAM that feeds AI accelerators, grinds its dies thinner and stacks more of them. Wafer thinning and thermocompression bonding leave micro-cracks that ordinary surface scans miss, and by the time a defect shows at final electrical test, sixteen premium dies are already scrap ².

SK hynix, Nvidia's▼−2.07% — Nvidia, down 2.07 percent today primary HBM supplier, is ramping 12-high stacks now with 16-high in design verification ². TrendForce, a market-research firm, expects HBM demand to grow by more than 50 percent by 2027 ¹. Onto launched the G5 in March and ran the joint engineering SK hynix credited to its product teams ¹; Dragonfly inspection revenue rose 30 percent sequentially in the June quarter↗ ³.

The spending is sized, the order book is not

Analysts at RBC size the next leg. The bank expects memory makers to move the HBM base die, the logic wafer a DRAM stack sits on, onto advanced nodes for speed and lower power; Samsung has already switched, and SK hynix and Micron▼−0.37% — Micron, down 0.37 percent today, the other two big HBM makers, are expected to follow ⁴. That shift needs about $30 billion of added wafer-equipment spending, mostly in late 2027 and 2028↗ ⁴.

Within that view RBC still splits the field, rating Onto Outperform, a buy, while holding KLA▼−3.25% — KLA, down 3.25 percent today, Onto's larger rival in process-control tools, at Sector Perform, a hold ⁴. KLA has already raised its forecast for packaging process-control revenue to about $1.1 billion this calendar year, up more than 70 percent ⁵.

A record quarter, a first billion in backlog

Onto's own evidence is thinner but real: a record June quarter, a backlog above $1 billion for the first time in its history↗ ⁶, and more than $200 million of Dragonfly orders from a single packaging contractor, mostly for 2027 delivery, under an HBM volume purchase agreement ³.

December 17 is the date that prices the gap

Onto holds about $1.9 billion of cash and short-term investments after selling zero-coupon convertible notes due 2031↗ ⁷. It spent about $720 million of that firepower on a 27 percent stake in Rigaku, the X-ray metrology company ⁷. That cushion is what lets Onto keep developing tools while most of the new spending is still more than a year away.

The chain has a missing middle between a proven tool and an order book sized to the spending, and Onto's analyst event on December 17 at the New York Stock Exchange↗ is the next date that can close it with numbers ⁸. Making 16-high stacks manufacturable at volume is the work that earns this money. SK hynix has now said publicly that Onto is doing that work; the orders are what December has to show ¹.