KLA
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The KLA RS 55 TC Four Point is a four-point probe for resistivity mapping. The KLA RS 55 TC Four Point is also referred to as the KLA TENCOR PROMETRIX RS 55 TC FOUR POINT PROBE RESISTIVITY MAPPING SYSTEM. The KLA RS 55 TC Four Point is configured for 8-inch wafers.[1]
Four-point probe equipment measures sheet resistance by making electrical contact at four points on a wafer surface.
Resistivity mapping systems use repeated probe measurements across a wafer to build a spatial map of electrical uniformity.
The KLA RS 55 TC Four Point belongs in wafer metrology and electrical test rather than in wafer fabrication steps that change the material.
The KLA RS 55 TC Four Point is used after a wafer has undergone a process whose electrical uniformity needs verification.
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The RS 55 TC is a four-point probe resistivity mapping system used for measuring sheet resistance across semiconductor wafers.[1]
The RS 55 TC was manufactured by KLA (KLA-Tencor, Prometrix division).[3][2][1]
The RS 55 TC is categorized as a Test & Probe tool.[2]
The following facts about the RS 55 TC Four Point 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 RS 55 TC Four Point 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 RS 55 TC Four Point are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the RS 55 TC Four Point 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 RS 55 TC Four Point 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 RS 55 TC Four Point are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
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Last updated Oct 7, 2026.
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