Wafer Tracking: Connecting Carriers, Lots, and Process History
https://yenra.com/semiconductors/tracking.html
Updated September 11, 2026

Purpose: Review carrier-to-material associations and event handling with manufacturing and MES engineers. This aid is not a physical handling procedure, SEMI conformance test or equipment command script.
Instructions: Use a qualified test environment and synthetic identifiers. Define expected outcomes from the implemented interface specifications. Keep production material records and recipes private.

Tool / port / carrier and tag type / reader model / firmware:
MES or host / adapter version / implemented SEMI revisions:
Carrier identity source / substrate and lot identity source:
Slot-map verification source / association owner and version:
Event identifier / observation time / receipt time / time synchronization:
Acknowledgment / retry / duplicate handling / recovery contract:

Synthetic carrier-reuse test (illustrative times, same test day):
08:00 DEMO-C17 associated with DEMO-A and verified slot map.
09:00 approved unloading closes DEMO-A association.
10:00 DEMO-C17 associated with DEMO-B under a new association version.
10:05 delayed observation from 08:00 arrives.
Expected: reconcile against original DEMO-A context or raise an explicit exception if evidence is insufficient; never silently attach the old event to DEMO-B.
Observed result / evidence / reviewer:

Other tests: unexpected carrier; unreadable tag; duplicate event; slot-map mismatch; split/merge or transfer lineage; interface outage and recovery.
For EACH: expected host/equipment behavior / actual result / evidence / owner / disposition.

Cleanroom/material and physical test approvals / exact equipment documents:
Acceptance boundaries / remaining uncertainty / revalidation triggers:

Public scope references (use licensed specifications for implementation):
https://store-us.semi.org/products/e09900-semi-e99-specification-for-carrier-id-reader-writer
https://store-us.semi.org/products/e08700-semi-e87-specification-for-carrier-management-cms
https://store-us.semi.org/products/e09000-semi-e90-specification-for-substrate-tracking