FormFactor
Alessi REL 4100
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 Alessi REL 4100 is a wafer prober associated with the FormFactor, Cascade Microtech, and Alessi brands. The Alessi REL 4100 supports 8-inch wafers.[1]
What it is
General reference — not yet source-verifiedThe FormFactor Alessi REL 4100 is a semiautomatic analytical probe system used for electrical characterization of semiconductor devices at the wafer level.
How it works
General reference — not yet source-verifiedThe system moves the wafer in the X, Y, and Z axes under a microscope to enable user-guided or semiautomatic contact with test pads.
Low-noise triaxial or coaxial cabling carries signals between the probes and external parametric test instruments such as semiconductor parameter analyzers.
Where it fits in the process flow
General reference — not yet source-verifiedWafer probing is performed after wafer fabrication and before dicing, as part of the electrical test or parametric test step.
Upstream steps include photolithography, etch, deposition, and all front-end-of-line and back-end-of-line processes that form the devices on the wafer.
Applications
General reference — not yet source-verifiedCommon device types tested on such probe stations include transistors, diodes, integrated circuits, and test structures on silicon or compound-semiconductor substrates.
What do the numbers mean?
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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Not publicly documented
The following facts about the Alessi REL 4100 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
Fewer than 3 independently cited specifications for the Alessi REL 4100 are on record; the remainder await public documentation.
Answerable by: an OEM datasheet, a cleanroom equipment inventory, or an engineer who operated or installed it
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the Alessi REL 4100 are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the Alessi REL 4100 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 Alessi REL 4100 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 Alessi REL 4100 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (1)Every fact above is drawn from these public sources
- [1]Equipment inventory listing
Last updated Sep 24, 2026.
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