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Zeiss

Merlin

Metrology & Inspection4"Zeiss Merlin family
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Zeiss MERLIN is a scanning electron microscope at CMi. Zeiss MERLIN has a GEMINI II column and a 5-axis motorized stage. Zeiss MERLIN supports a full 4 inch wafer holder.[1]

Merlin — epfl.ch
Fig. 01Merlinepfl.ch[1]
  • Plate 01VOLK MERLIN on Zeiss microscope

    Facundo BWatch on YouTube
  • Plate 02ZEISS MERLIN 3View and SIGMA VP 3View - SBF-SEM/SBEM Workflow Animation

    ZEISS MicroscopyWatch on YouTube
  • Plate 03SEM EDX analysis using Zeiss Merlin equipment | Full version

    Ahror IsmoiliWatch on YouTube

Wafer size

4"

Power

0.02–30 kV[2]

Optics

GEMINI II[1]

What it is

General reference — not yet source-verified

Scanning electron microscopes form images by rastering a focused electron beam across a specimen and collecting emitted or reflected signals. In semiconductor and microfabrication work, tools of this class are used for critical inspection, dimensional review, defect observation, materials contrast, and documentation of patterned structures.

How it works

General reference — not yet source-verified

A scanning electron microscope focuses electrons onto the sample surface and derives contrast from secondary electrons, backscattered electrons, and related signals. Different detector placements emphasize surface detail, topographic contrast, compositional contrast, crystallographic information, or transmission contrast from suitably thin specimens.

Where it fits in the process flow

General reference — not yet source-verified

In microfabrication, a scanning electron microscope sits in the characterization and process-control portion of the flow rather than in deposition, lithography, or etch itself. A tool of this class is commonly used after patterning, etching, deposition, cleaning, or sample preparation steps when engineers need image-based confirmation of feature shape, profile, continuity, residue, overlay-related appearance, or defectivity before downstream processing or final analysis.

Applications

General reference — not yet source-verified

In fab and lab practice, scanning electron microscopes are applied to patterned lines, contact features, films, particles, fractures, residues, interfaces, and other microstructured surfaces. With suitable detector options, machines in this class can also support elemental analysis, crystallographic mapping, and inspection of insulating or electron-transparent specimens.

  • Imaging for process control
  • Offline analysis and metrology
  • Elemental compositional analysis by EDX

What do the numbers mean?

Power & electrical1

Acceleration voltage
0.02–30 kV[2]
Accurate?

Wafer handling6

Loadlock
Semi-automatic airlock[1]
Accurate?
Available holders
mono samples, cleaved samples, and full 4 inch wafer[1]
Accurate?
Loadlock
Semi-automatic airlock/loadlock[1]
Accurate?
Holders
Mono samples, cleaved samples, and full 4 inch wafer[1]
Accurate?
Sample holders
mono samples, cleaved samples, full 4 inch wafer[1]
Accurate?
Wafer holder
Full 4-inch wafer[1]
Accurate?

Optics & imaging12

Column
GEMINI II[1]
Accurate?
Detectors
In-Lens, HE-SE2, EsB, and EDX detector[1]
Accurate?
Column
GEMINI II electron optical column[1]
Accurate?
Detector
In-Lens detector[1]
Accurate?
Detector
HE-SE2 detector[1]
Accurate?
Detector
EsB detector with filtering grid[1]
Accurate?
Detector
EDX detector[1]
Accurate?
Electron optical column
GEMINI II[1]
Accurate?
Detector types
In-Lens, HE-SE2, EsB, EDX[1]
Accurate?
Instrument type
High-resolution field-emission SEM / FE-SEM[1]
Accurate?
Electron column
Gemini II column[1]
Accurate?
Detectors
SE, SE in-lens, EsB (BSE)[2]
Accurate?

Control & software3

Control software
ZeissSmartSEM[1]
Accurate?
Control software
ZeissSmartSEM software[1]
Accurate?
Software for offline analysis and metrology
ProSEM software[1]
Accurate?

Configuration & options7

Instrument type
Scanning electron microscope (SEM)[1]
Accurate?
Stage
5-axis motorized stage (X, Y, Z, Tilt and Rotation)[1]
Accurate?
Stage
5-axis motorized stage (X, Y, Z, Tilt, Rotation)[1]
Accurate?
Instrument type
SEM (scanning electron microscope)[1]
Accurate?
Stage
5-axes motorized stage (X, Y, Z, Tilt and Rotation)[1]
Accurate?
Stage
5-axes motorized eucentric specimen stage (X, Y, Z, Tilt, Rotation)[1]
Accurate?
Probe current
few pA–300 nA[2]
Accurate?
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What replaced it?

  • siblingZeiss Leo 1550— Listed in the same equipment section as Zeiss MERLIN.source[1]
  • siblingZeiss CrossBeam 550— The basic training notes differences between the SEM Crossbeam and SEM MERLIN, and state that being fully trained on SEM MERLIN is a prerequisite.source[3]

What does it need to run?

Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.

  • Acceleration voltage0.02–30 kV[2]

Where are the manuals?

Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.

Not publicly documented

Field notes

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Frequently asked questions

What column does the Zeiss Merlin use?

The Zeiss Merlin uses a GEMINI II column with a Schottky field emitter and a combined electrostatic/electromagnetic lens doublet.[1]

What stage does the Zeiss Merlin have?

The stage is motorized with five axes (X, Y, Z, tilt, rotation) and is eucentric, meaning all rotation axes intersect at a single point.[1]

What detectors are available on the Zeiss Merlin?

Three detectors are fitted: an In-Lens detector for high-resolution SE imaging, a HE-SE2 Everhart-Thornley detector for topography, and an EsB with filtering grid for pure material contrast.[1]

Can the Zeiss Merlin perform EDX analysis?

EDX analysis is possible after additional training, and it requires full confirmation of SEM imaging first.[1]

What software controls the Zeiss Merlin?

The microscope is controlled by the ZeissSmartSEM software via a graphical user interface.[1]

Not publicly documented

The following facts about the Merlin are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.

  • No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the Merlin are on record.

    Answerable by: OEM historical records or a trade-press announcement

  • No publicly documented variants, configuration options, or revision breakpoints of the Merlin are on record.

    Answerable by: an OEM product catalog or an engineer who ordered or specified the tool

  • The control-system platform and OS era of the Merlin are not on record.

    Answerable by: an engineer who operated it or OEM installation records

  • No publicly documented failure modes or field errata for the Merlin are on record.

    Answerable by: a field service engineer, process engineer, or maintenance technician

  • The process node or technology generation of the Merlin is not on record.

    Answerable by: an OEM datasheet or a fab qualification report

No research found yet — worked with this tool? Share what you know.

Sources & citations

Sources (4)Every fact above is drawn from these public sources
  1. [1]epfl.ch — epfl.chepfl.ch
  2. [2]scopem.ethz.chscopem.ethz.ch
  3. [3]epfl.chepfl.ch
  4. [4]Capabilities | UD Nanofabrication Facility — udnf.udel.eduudnf.udel.edu
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Last updated Oct 20, 2026.

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