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KLA

FLX 2320

Metrology & InspectionKLA FLX 2320 family
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The KLA FLX 2320 is a thin-film stress measurement tool for wafers. The KLA FLX 2320 measures wafer curvature before and after film deposition to calculate film stress. The KLA FLX 2320 supports 4, 5, 6, and 8 inch wafer sizes.[1]

KLAFLX 2320
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Performance

1 MPa[1]

Optics

670 nm, 785 nm[2]

What it is

The KLA FLX 2320 is a thin-film stress measurement tool used in semiconductor metrology and inspection. It measures changes in wafer curvature caused by deposited films and can also be used to derive elastic constants and thermal expansion coefficients when film and substrate thickness are known.[3][1]

How it works

This class of tool measures wafer bow or curvature before and after film deposition, then uses the curvature change to calculate film stress. The measurement head uses a laser beam reflected from the substrate surface, so the wafer must be able to reflect the beam.[3][1]

Where it fits in the process flow

The FLX 2320 sits in the metrology and process-control flow after thin-film deposition and before later integration steps that depend on film integrity. It is used to check stress, curvature, and temperature dependence of deposited films on wafers.[3][1]

Applications

The tool is used for film stress measurement, stress characterization of membranes, stress mapping, and measuring stress as a function of temperature. It is also used to assess wafer curvature and to minimize stress in multilayer thin films.[1]

What do the numbers mean?

Wafer handling1

Wafer sizes
4, 5, 6, 8 inch[2]
Accurate?

Optics & imaging4

Dual Wavelength Scanning
670 nm, 785 nm[2]
Accurate?
Exchanged New Laser[2]
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Measurement principle
Laser interferometer measuring curvature before and after film deposition[1]
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Resolution
1 MPa[1]
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Performance1

Repeatability
1 MPa[1]
Accurate?

Control & software4

Exchanged PC & SSD[2]
Accurate?
Windows 3.1 Operating System[2]
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Software Version
4.4[2]
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Operating system
Windows 3.1[2]
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Dimensions & facilities1

Two-dimensional mapping
Supported[1]
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Configuration & options8

Refurbished[2]
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Room Temperature to 500 C[2]
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Operation Manual
Digital Copy[2]
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Manufacturer
KLA[2]
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Model
FLX 2320[2]
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Operating temperature
room temperature to 500 C[2]
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Stress range
1 MPa to 4 GPa[1]
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Scan rate
6 seconds per scan[1]
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Where are the manuals?

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Not publicly documented

Field notes

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Frequently asked questions

What does the FLX 2320 measure?

The FLX 2320 measures wafer curvature before and after film deposition and uses the change in curvature to calculate stress on the deposited film.[1]

Not publicly documented

The following facts about the FLX 2320 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 FLX 2320 are on record.

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

  • No publicly documented variants, configuration options, or revision breakpoints of the FLX 2320 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 FLX 2320 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 FLX 2320 are on record.

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

  • The process node or technology generation of the FLX 2320 is not on record.

    Answerable by: an OEM datasheet or a fab qualification report

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Sources & citations

Sources (6)Every fact above is drawn from these public sources
  1. [1]nist.gov — nist.govnist.gov
  2. [2]inventory listing
  3. [3]Film Stress Tencor FLX-2320 | Utah Nanofab — nanofab.utah.edunanofab.utah.edu
  4. [4]Metrology ‒ Center of MicroNanoTechnology CMi ‐ EPFL — epfl.chepfl.ch
  5. [5]Fab.nano Equipment Rates START.nano March 2026 0 — nanousers.mit.edunanousers.mit.edu
  6. [6]KLA-Tencor | Products | Alpha-Step 500 — tencor.com (Jul 27, 2003)web.archive.org
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Last updated Oct 21, 2026.

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