Applied Materials Is Building a Second Growth Engine in Advanced Packaging

A high-bandwidth memory stack is a skyscraper built from silicon. Twelve or sixteen floors of DRAM, thinned to a whisper, wired with thousands of vertical copper pillars, then bonded onto the same package as the GPU beside it.

Applied Materials builds the machines that make those chips. It deposits the films, etches the patterns, polishes surfaces flat an atom at a time, implants the ions and inspects the result. TSMC, Samsung, SK hynix, Micron and Intel all buy from it.

Plain English: a fab is a kitchen with a thousand identical ovens, and Applied sells the ovens, the scrubbers and the detergent. Then it sends a crew back every year to keep them running.

Its grip is uneven. Applied leads deposition near 40% share, CMP around 35% and ion implant about 45%. Conductor etch belongs to Lam Research.

The AI money is arriving through memory. HBM needs about three times the wafer area of DDR5 for the same capacity, and an HBM4 die carries roughly 256 memory banks against DDR5's 32. On a console, the GPU is the box and the memory can never be upgraded.

SEMI expects DRAM tool spending to rise 39% to $38.8 billion this year, inside a record $143.9 billion wafer-fab market. Memory is about 37% of equipment sold, and 300-millimeter memory investment tops $50 billion for the first time.

Applied is already collecting. DRAM revenue, including HBM packaging, climbed 52% to a record last quarter, and DRAM went from 22% of its systems business to 26%. Reports put Micron alone at 60,000 additional HBM wafers a month by year-end.

The next leg is packaging. Advanced packaging, the wafer-level steps wrapped around the stack, was a $1.4 billion business for Applied last year. Management raised its growth outlook for it twice in twelve months, from more than 50% to more than 70%.

Six new tools landed in one quarter for exactly that work. Opta Quad handles the polishing hybrid bonding leans on, and Nokota VMax 2 fills the copper pillars between floors. Producer Avila 2 lays the films that hold a sixteen-layer stack together.

Now the honest part. Nearly every HBM stack shipping today is assembled with thermal compression bonding, and Applied is not among the top five vendors in that $2.3 billion market. Hybrid bonding, the platform Applied shares with BE Semiconductor through a 9% stake and calls Kinex, enters HBM at the HBM4E generation.

BE Semiconductor's own investor deck points to volume production in 2027. Hanmi Semiconductor says a loosened package-height standard pushes full-scale hybrid bonding in HBM to 2029 or 2030. Applied gets paid for today's floors; the welding rig for the next decade arrives later.

That gap is the stock question. The shares sit about a third below their late-June high, and it trades at a discount to Lam Research and KLA.

What re-rates it? Gross margin holding at or above the 50.4% guide, which management set flat sequentially against revenue up 51% year over year. That flat line, driven by the service-engineer ramp, is what the market punished.

China revenue has to grow in absolute dollars, as promised, after slipping from 35% of sales to 28%. Service revenue has to compound too, because toolmakers that earn from machines already installed get valued differently than ones that only ship boxes.

Read the file the way a short seller would. Memory has never added capacity this aggressively without overshooting, and the slowdown is already in the forecasts. DRAM tool spending climbs 39% this year, then about 27%.

Much of the announced capex is concrete, not equipment. Micron's next Idaho fab starts producing wafers in mid-2027. SK hynix's first Yongin cleanroom opens in early 2027, and the second waits until 2029.

Applied's own finance chief handed the bears their sharpest argument: NAND bit demand grows while layer stacking means fabs need fewer wafers, not more. If that reaches HBM, the wafer-intensity case weakens as the build peaks. The tell is checkable: gross margin under the guided 50.4%, China dollars flat, or hybrid bonding sliding to 2030.

Two dates settle it. Applied hosts its first longer-term financial framework at a SEMICON West investor breakfast on October 13, then reports fiscal fourth-quarter results in November. Watch the margin line and the China dollar figure.

The memory build pays Applied's bills right now. The packaging franchise is the piece the market still treats as optional, and the next two prints are where that gets decided.

Disclosure: The Signal holds no position in AMAT. Positions may change. This is not financial advice.