KLA

Darkfield inspection systems inspect wafer surfaces and patterned layers by collecting scattered light from defects while suppressing directly reflected light. Darkfield inspection tools are used in semiconductor manufacturing to find particles, pattern excursions, and other yield-relevant defects.
Darkfield inspection tools illuminate the wafer and detect scattered light from localized surface or pattern irregularities. Darkfield inspection tools generate defect information that is used for process monitoring, excursion detection, and review planning.
Darkfield wafer inspection tools are placed at inspection points between fabrication steps to check process results before more value is added downstream. Darkfield inspection commonly follows deposition, lithography, etch, clean, or planarization steps when fabs need rapid feedback on defectivity.
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The following facts about the Altair 8920 Darkfield 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 Altair 8920 Darkfield are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the Altair 8920 Darkfield 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 Altair 8920 Darkfield 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 Altair 8920 Darkfield are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the Altair 8920 Darkfield is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Oct 21, 2026.
The KLA .204 PSL Wafer is an 8-inch NIST-traceable reference wafer compatible with Surfscan 6xy0 and Sp1 particle counters.
KLA .496 PSL Wafer is an 8-inch NIST traceable wafer stated to be capable on Surfscan 6xy0 and SP1.
The KLA .498 PSL Wafer is a NIST traceable reference wafer.