EquipmentStatus: FOUNDATIONALUpdated 2026-08-24

Atomic Layer Deposition Reactor

A cyclic deposition reactor that alternates surface-limited precursor exposures to build highly controlled and conformal thin films.

Evidence status

Checked against 1 inspected source

One source was retrieved, identified and read, and the claims below are tied to specific passages at the scope those passages state. Each source also records what it cannot establish.

Rely on this page for

The specific claims that carry a cited passage, at the scope that passage states.

Definition

An atomic layer deposition reactor separates precursor and reactant doses with purge steps so that self-limiting surface reactions add material cycle by cycle, enabling thickness control and conformal coverage on complex three-dimensional structures.

Process position

03 · FEOL04 · MEOL05 · BEOL

Inputs

  • Prepared wafer
  • Alternating precursors
  • Purge gas
  • Cycle recipe

Outputs

  • Conformal thin film
  • Cycle and chamber-history data

How it works

  1. 01Condition chamber and wafer
  2. 02Dose first precursor
  3. 03Purge excess species
  4. 04Dose co-reactant or plasma
  5. 05Purge and repeat cycles

Role in the production flow

ALD is selected when surface control and conformality justify a relatively slow cyclic process. Reactor design must deliver repeatable saturation and complete separation of reactive species across the full wafer and feature geometry.

Interested partyCombines sources[1][2][3]

A cyclic deposition reactor that alternates surface-limited precursor exposures to build highly controlled and conformal thin films.

Boundary: The cited manufacturers document the equipment category and its intended uses; this record does not independently validate vendor performance claims or rank products.

Qualification and production boundaries

The qualified window must state precursor chemistry, temperature, dose and purge sequence, plasma conditions if any, growth per cycle, conformality target, impurity limits, chamber matching, and acceptable throughput.

Bounded inferenceMaha inference[1][2][3]

The qualified window must state precursor chemistry, temperature, dose and purge sequence, plasma conditions if any, growth per cycle, conformality target, impurity limits, chamber matching, and acceptable throughput.

Boundary: Actual acceptance limits, recipes, throughput, availability, and ownership economics are product-, process-, site-, and contract-specific.

Sources

Citations support the tagged claims above. Access dates record when Maha Strategies last checked the public source.

  1. [1]Atomic Layer Deposition · Applied Materials · accessed 2026-08-13
  2. [2]Semiconductor Products · Applied Materials · accessed 2026-08-24
  3. [3]Our Processes · Lam Research · accessed 2026-08-24

Continue through the graph

Process

Thin-film deposition

Process

Plasma etch

Direct answer

  • An atomic layer deposition reactor separates precursor and reactant doses with purge steps so that self-limiting surface reactions add material cycle by cycle, enabling thickness control and conformal coverage on complex three-dimensional structures.

Mechanism and method

  • Condition chamber and wafer
  • Dose first precursor
  • Purge excess species
  • Dose co-reactant or plasma
  • Purge and repeat cycles

What is measured

  • Dose saturation
  • Purge completeness
  • Temperature window
  • Cycle count
  • Plasma exposure where used
  • Nucleation delay
  • Growth per cycle
  • Film thickness
  • Conformality cross-section
  • Composition analysis
  • Electrical-property measurement

Limitations

  • Incomplete saturation
  • Parasitic CVD reaction
  • Precursor condensation
  • Poor nucleation
  • Impurity incorporation
  • Chamber cross-contamination

Boundaries declared by the cited sources

  • A review centred on particle ALD. It gives no quantitative kinetic rates for individual steps, no quantum-mechanical account of why the reactions self-limit, and no wafer-scale tool throughput or uniformity data, so it cannot support a claim about any production reactor's performance. (boundary declared by Particle atomic layer deposition)

Related records