KLA
4PP-TypeF
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The KLA 4PP-TypeF is a 4-point probe. The KLA 4PP-TypeF is listed on the KLA Instruments product page.[1]
What it is
The 4PP-TypeF features a probe spacing of 0.625 mm, a tip radius of 40 µm, and a contact force rating of 100 grams. The probe is specifically designed for metal measurement applications. The 4PP-TypeF is compatible with Filmetrics R50 and R54 four-point probe measurement systems.[2][3]
Where it fits in the process flow
General reference — not yet source-verifiedSheet resistance measurements are performed after thin-film deposition steps such as metal sputtering, evaporation, or chemical vapor deposition. The measurement verifies the resistivity and uniformity of the deposited layer. In semiconductor manufacturing, four-point probes are used for process monitoring and quality control of metal interconnects and other conductive films.
Applications
What do the numbers mean?
Configuration & options11
What replaced it?
Related models
- siblingKLA 4PP-TypeEsource[1]
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
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What is the difference between two-point and four-point probe measurements?General reference — not yet source-verified
Two-point probe measurements apply current and measure voltage through the same pair of probes, so contact resistance can severely affect accuracy. Four-point probes separate the current and voltage paths, allowing voltage to be measured with a high-impedance voltmeter that draws negligible current, thereby eliminating the influence of contact and lead resistances from the measurement.
How does sample thickness affect the measurement?General reference — not yet source-verified
When the sample thickness is less than about half the probe spacing, the measured resistance depends on both sheet resistance and thickness. Correction factors are applied to account for finite thickness. For thick samples (more than several probe spacings), the bulk resistivity can be computed directly. Many modern systems automatically determine the appropriate correction based on user-input thickness or known geometry.
What are typical maintenance requirements for a four-point probe system?General reference — not yet source-verified
Regular maintenance includes cleaning or replacing probe tips as they become worn or contaminated, verifying probe spacing alignment, and calibrating the current source and voltmeter. Probe tip force should be checked periodically to ensure consistent contact without damaging the sample. Environmental conditions such as temperature and humidity can also affect readings, so some systems require periodic recalibration.
Can four-point probe measurements be performed on patterned wafers?General reference — not yet source-verified
Yes, but care must be taken because the probes contact small areas that may include multiple material layers or structures. The measurement will represent the sheet resistance of the area under the probes, which may not be uniform. Some systems offer micro-probe heads with very small tip spacing for measuring within small test structures. Measurements on patterned wafers are often used for process monitoring rather than absolute resistivity determination.
Not publicly documented
The following facts about the 4PP-TypeF 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 4PP-TypeF are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 4PP-TypeF 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 4PP-TypeF 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 4PP-TypeF are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 4PP-TypeF 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 (3)Every fact above is drawn from these public sources
- [1]store.kla-instruments.com — store.kla-instruments.comstore.kla-instruments.com
- [2]cntech.co.uk — cntech.co.ukcntech.co.uk
- [3]store.kla-instruments.com — store.kla-instruments.comstore.kla-instruments.com
Last updated Oct 8, 2026.
