What Does Lam Research Do? The Etch-and-Deposition Model

Lam Research sells the etch and deposition chambers that carve and build the film after the scanner prints the pattern: it gets paid when a system is recognised, while the wafer still waits on an ASML slot.

SEMICONDUCTORS · Data as at 29 Jul 2026 · Next update: after Lam Q1 FY2027 results (company calendar, 21 Oct 2026)
Affects: Semiconductors · Taiwan · Korea · US

It is the etch-and-deposition company on the semiconductors layer: the machines that carve deep holes and lay down films once EUV has printed the pattern. Memory is the heavier mix this quarter. The foundry that still buys most of the leading-edge boxes around it is TSMC. See who makes wafer fab equipment and memory process tools.

In short: Lam sells etch, deposition and clean tools, then services the fleet. The June 2026 quarter printed $6.722bn of revenue — $4.250bn systems, $2.472bn customer support-related. Memory was 46% of systems mix (DRAM 23%, NAND 23%). Chambers ship if the cleanroom can take them. The layer’s stuck step is still the scanner slot.

Education only, not advice to buy or sell any security. Figures are from company filings and company releases dated as shown. Outlook is labelled outlook.

Numbers that matter

Sources: Lam Research results for the quarter ended 28 Jun 2026, Form 8-K exhibit 99.1, 29 Jul 2026; June quarter 2026 financial results slides, 29 Jul 2026. Status chips are Second Order’s read. Systems mix percentages are the slides’; the 8-K does not print foundry/DRAM/NAND dollars. September figures are guidance. The print for that guide is due 21 Oct 2026.

Our arithmetic. Systems were 63.2% of the quarter (4,249.848 ÷ 6,722.238 = 0.632). CSBG 36.8% (2,472.390 ÷ 6,722.238 = 0.368). Total was up 30.0% year over year (6,722.238 ÷ 5,171.393 = 1.300) and 15.1% sequentially, matching the 8-K. Mix applied to 8-K systems: about $1.87bn foundry (0.44 × 4,249.848), $0.98bn DRAM (0.23 × 4,249.848), $0.98bn NAND, $0.43bn logic/other. Memory $1.95bn (0.46 × 4,249.848). The slides’ mix footnote is broader than the 8-K systems line — it includes equipment-upgrade and Reliant sales — so treat those dollars as a read of mix, not a second income statement. Net margin 33.9% (2,277.282 ÷ 6,722.238). China 26% of total is about $1.75bn (0.26 × 6,722.238); Taiwan 27% about $1.82bn; Korea 20% about $1.34bn.

What does Lam Research actually do?

Three steps, in order.

Carve. Ship. Service.

1. It carves the hole, then builds the film. Lithography prints the pattern. Lam’s tools do the deep work around it: conductor and dielectric etch, deposition and clean. The 10-K is the catalogue — Kiyo and Akara for conductor etch, Vantex for high-aspect-ratio dielectric holes, VECTOR/ALTUS/SABRE for films, Syndion for TSV. ASML prints. Applied, Lam and Tokyo Electron build and carve. KLA checks. Memory tools: memory process tools. This page is the carve specialist.
2. It ships a counted invoice, not a counted scanner plan. There is no “65 Low-NA” equivalent. June systems were $4,250 million versus $3,438 million a year earlier (4,249.848 ÷ 3,437.625 = +23.6%, our arithmetic). Company slides put NAND revenue as having doubled sequentially. DRAM held 23% of systems mix. Foundry was 44%. Do not read $4.250 billion as a shipped accelerator.
3. It services the installed fleet. Customer support-related revenue is parts, engineers, upgrades and the Reliant non-leading-edge line. The 8-K printed $2,472 million, up 17.1% sequentially (2,472.390 ÷ 2,110.906 = 1.171) and 42.6% year over year (2,472.390 ÷ 1,733.768 = 1.426). Company slides put the conductor-etch installed base at more than 40,000 chambers. That invoice does not wait for a new tool to ship.

Lam also sells TSV etch and electroplating into advanced packaging; the slides say that line is on track for more than 70% year-over-year growth. That is outlook, and a neighbour clock on hybrid bonding and CoWoS. It is not the June $4.250 billion.

How does Lam Research make money?

It gets paid when a system is recognised, and again when the installed fleet is serviced. Three things decide which cash prints, and when:

• Recognition — a tool in deferred revenue is not the quarter’s sales until Lam’s accounting says it is. Deferred revenue was $2.434 billion at 28 June 2026, up from $2.221 billion at 29 March 2026. Shipments to Japan sit outside that balance until customer acceptance; estimated future revenue from those shipments was $490.2 million at 28 June 2026.
• Mix — foundry versus DRAM versus NAND versus logic; new systems versus CSBG.
• The installed base — idle chambers still need parts; busy chambers buy upgrades, Equipment Intelligence software, and the Dextro automation the slides are rolling from NAND into DRAM.

On 29 July 2026 the 8-K printed $6,722 million of revenue: $4,250 million systems, $2,472 million customer support-related. GAAP gross margin 51.7%, operating margin 37.4%, net income $2,277 million, diluted EPS $1.81. Cash, cash equivalents and restricted cash $5.598 billion. Operating cash flow $1,457 million minus capex $189 million = $1.268 billion left after tools (ours). Full-year FY2026 revenue was $23.233 billion, against $18.436 billion (23,232.690 ÷ 18,435.591 = +26.0%).

Who gets paid. Lam, on the recognised chamber and on CSBG. Who pays. TSMC, Samsung, Intel Foundry, SK hynix, Micron — the same wafer buyers as on the Applied page. Money sticks at the recognised tool and the service contract, not at a foundry capex headline. See the Taiwan capex-split Pulse.

Guidance for the quarter ended 27 September 2026 was $8.10 billion ± $400 million, non-GAAP gross margin 52.0% ± 1%, non-GAAP operating margin 39.5% ± 1%, non-GAAP diluted EPS $2.15 ± $0.15. Midpoint versus June is +20.5% (8,100 ÷ 6,722 = 1.205). That is outlook. The print is the 21 October call.

What limits it?

Scanner slots first. Cleanroom conversion second. China mix third. Neighbour clocks fourth.

1. A shipped etch chamber does not print a leading-edge die by itself. Every advanced logic wafer and most new DRAM still need an ASML scanner. On 14 October 2026 ASML said planned supply for 2027 and 2028 will not fully meet demand. See the Wire. Lam can raise a systems invoice while the wafer still waits on a Low-NA slot. Do not read $4.250 billion as a shipped accelerator.
2. The hole still has to convert. NAND doubling sequentially is a conversion print — 256-layer and above, on the slides — not a new-fab print. DRAM mix at 23% can stay “strong” on the slides while HBM cubes wait on SK hynix allocation and Micron cleanroom timing. See the US Micron Idaho Pulse. A Vantex or Akara box in a bay is not a tested stack.
3. China is a mix, not an EUV escape. The 8-K geo table puts China at 26% of total revenue, Taiwan 27%, Korea 20%, Japan 9%, United States 9%. Lam’s China print is process tools. It is not a scanner substitute, and it moves with licences.
4. A processed wafer still needs a stack and a slot. HBM and CoWoS sit after the chamber. Packaging tools on the slides — TSV etch, electroplating, panel-level shipments — are Lam’s seat on that neighbour. They do not move the scanner bind. Calendar-2026 WFE in the low $150 billion range is the company’s outlook, not this 8-K.

The honest uncertainty is conversion. An $8.10 billion September guide can still miss if installs slip, licences stall, or the NAND conversion the slides flagged does not hold in the 21 October print.

Who else does this?

Roles, not a league table.

What separates them is who can ship a qualified EUV box — that is ASML — versus who gets paid on the hundreds of other steps. Lam sits on the carve seat. Applied sits on the widest chamber seat. They overlap on etch and deposition; they do not overlap on implant, CMP breadth, or EUV.

What would change this view?

The read on the model weakens if:

• The 21 Oct 2026 print comes in well below the $8.10 billion ± $400 million guide
• Memory mix rolling over, or NAND’s sequential doubling failing to show as dollars in the next 8-K
• China geo jumping as a share of the invoice, or export licensing cutting the 26%
• Conductor-etch installs stalling while the slides still cite more than 40,000 chambers as if they were busy
• ASML 2027–2028 supply remaining short while Lam’s systems invoice is sold as if wafers were unconstrained
• CoWoS or HBM remaining so tight that processed wafers queue anyway — the neighbour clock stealing the bind

It stays intact while systems stay ~63% of the invoice, CSBG keeps a good third of the quarter, memory mix holds in the mid-40s, China stays a process-tool mix rather than an EUV story, and the scanner slot remains the layer’s stuck step.

Practical takeaways

• Lam’s model on this layer is Carve → Ship → Service: chambers around the scanner, a recognised systems invoice, then CSBG
• June 2026 quarter: $6.722bn sales, $4.250bn systems (63.2%), $2.472bn CSBG (36.8%), 51.7% GAAP gross margin, $2.277bn net income
• Mix (slides): foundry 44% / DRAM 23% / NAND 23% / logic 10% of systems. Our arithmetic on 8-K systems: ~$1.87bn / $0.98bn / $0.98bn / $0.43bn
• China 26% of total revenue (~$1.75bn); Taiwan 27%; Korea 20%
• Stuck step on the layer: ASML scanner slots for 2027–2028. Lam’s own clock: NAND/DRAM conversion and the $8.10bn ± $400m September guide, due 21 Oct 2026
• A processed wafer still waits on HBM and CoWoS

FAQ

What does Lam Research do?
Lam Research designs, builds and services wafer-process tools — primarily etch, deposition and clean, including the deep high-aspect-ratio etch used in 3D memory — and then charges again to keep those chambers running. It does not sell production EUV scanners. Systems revenue in the June 2026 quarter was $4.250 billion.

What does Lam Research do in simple terms?
It makes the machines a chip factory uses to carve deep holes and lay down films on a wafer after the pattern is printed, then charges again to service those machines.

Is Lam Research profitable?
Yes on the dated print. The June 2026 quarter’s net income was $2.277 billion on $6.722 billion of revenue, a 33.9% net margin, with a 51.7% GAAP gross margin (Form 8-K exhibit 99.1, 29 Jul 2026). That is not a forecast.

How is Lam Research different from Applied Materials?
Both sell process tools around the scanner. Applied has the wider catalogue — implant, CMP, epitaxy, packaging and eBeam on top of deposition and etch. Lam is narrower: etch and deposition, with a heavier memory mix this quarter (46% of systems) and a larger service share (CSBG 36.8% of sales). Neither sells production EUV. See What Does Applied Materials Do?.

What share of Lam’s sales is memory?
On the 29 July 2026 slides, memory — DRAM 23% plus NAND 23% — was 46% of systems mix, not 46% of total revenue. That is about $1.95 billion on our arithmetic (0.46 × $4.250 billion). CSBG is not split the same way in the 8-K.

Should I buy Lam Research shares?
We do not make buy or sell calls, and nothing here is a recommendation. What we can tell you is what the company does, how it gets paid, and which figures would change the picture. The decision is yours.

Keep reading on the map

• The layer: Semiconductors
• The mechanism: Who makes wafer fab equipment · Memory process tools
• The scanner: EUV, explained · What Does ASML Do?
• The foundry: Foundry and advanced packaging · What Does TSMC Do?
• The neighbours: CoWoS · HBM · SK hynix · Micron · Applied Materials
• The Wire: ASML 2027–2028 supply short
• Where it happens: Taiwan · TSMC capex split · Korea HBM · Micron Idaho

The members cut on the long clock is already live: Where does the stuck step move?. This page stays the free Stack read of the Lam model.

How we check this

Figures come from company filings and company releases, each dated below. Segment mix percentages are the 29 July slides’; dollar splits from those percentages applied to the 8-K systems line are our arithmetic, and the slides’ mix footnote is broader than the 8-K systems definition. NAND “doubled sequentially” is the slides. China 26% is the geo table. September $8.10 billion ± $400 million, CY26 WFE in the low $150 billion range and advanced-packaging “more than 70%” year-over-year are outlook. Conductor-etch installed base “>40,000 chambers” is the slides. Where we work something out ourselves, the arithmetic is shown in full.

Last reviewed: 20 Oct 2026 · Next review: after Lam Q1 FY2027 results (company calendar, 21 Oct 2026) print revenue against the $8.10 billion ± $400 million guide

Spot an error? Tell us; we will correct it here. Editorial standards →

Sources

1. Lam Research, results for the quarter ended 28 Jun 2026 (Form 8-K exhibit 99.1), 29 Jul 2026 — $6,722m revenue; systems $4,250m; CSBG $2,472m; GM 51.7%; net income $2,277m; China 26%; Taiwan 27%; Korea 20%; deferred revenue $2.43bn; Japan shipments $490.2m; Sep guide $8.10bn ± $400m
2. Lam Research, Form 8-K, 29 Jul 2026
3. Lam Research, IR copy of the same release, 29 Jul 2026
4. Lam Research, June quarter 2026 slides, 29 Jul 2026 — systems mix foundry 44% / DRAM 23% / NAND 23% / logic 10%; NAND doubled sequentially; CSBG $2.47bn; conductor etch >40,000 chambers; CY26 WFE low $150bn (outlook); advanced packaging >70% YoY (outlook)
5. Lam Research, Form 10-K for the fiscal year ended 28 Jun 2026 — etch, deposition and clean catalogue; CSBG definition
6. Lam Research, September 2026 earnings conference call listing — 21 Oct 2026, 2:00pm PDT
7. ASML, via Wire: 2027–2028 supply short, 14 Oct 2026

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