Electroglas
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The Electroglas 4090 u Wafer Prober is a wafer prober.[1]
A wafer prober is semiconductor test handling equipment that brings a processed wafer into controlled contact with probe needles or a probe card so electrical measurements can be made on individual die before separation. Wafer probers are used to position wafers accurately under a test interface and to step from site to site across the wafer during electrical characterization or production screening.
Wafer probers generally hold a wafer on a stage, align the wafer to a reference, and move the stage so device pads meet the probe interface at each test location. Wafer probers generally work together with external test instrumentation that applies signals and records electrical responses from each contacted die.
Wafer probing generally depends on precise motion control, optical alignment, controlled contact force, and repeatable indexing between die locations. Wafer probers commonly support mapping of pass and fail results so later handling steps can distinguish known good die from rejected sites.
Wafer probing sits after wafer fabrication has created electrically testable structures and before dicing or packaging separates the individual die. Wafer probing provides die level electrical data that can guide disposition, yield analysis, and selection of die for downstream assembly.
Wafer probers are used for electrical test, device characterization, process monitoring, and fault isolation on semiconductor wafers. Wafer probers can be applied to integrated circuits, discrete devices, sensors, and other wafer level devices that present contact pads suitable for probing.
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The following facts about the 4090 u Wafer 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 4090 u Wafer are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 4090 u Wafer 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 4090 u Wafer 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 4090 u Wafer are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 4090 u Wafer is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Oct 16, 2026.
The Tenney TPS JR-A-F4T is a junior compact temperature test chamber with a 1.2 cubic foot chamber size and a temperature range of -68°C to +180°C.
The Rorze 03 RR 8120-001-001 is a wafer exchanger for 8-inch wafers.
The KLA 1007 is a wafer prober manufactured by KLA.