Used FOUP & Wafer Carrier Buying Guide: Fit & Condition
Buying used FOUPs? Check carrier identity, load-port fit, cleaning records and acceptance tests before comparing quotes.
For fab procurement and process teams buying used FOUPs, start with the exact carrier your line can qualify—not a brand-only quote. Use the checklist below to request evidence, compare like-for-like offers and agree on acceptance before purchase.
What to match before requesting a quote
Ask your process owner to approve a requirement sheet covering:
- Identity: manufacturer, complete part number, revision and photographs of the body and door labels.
- Wafer requirement: diameter, thickness, slot count and any special handling restrictions for your process.
- Tool interface: load-port model, door interface, carrier identification method and any purge connections required by your installation.
- History: previous application, cleaning procedure, inspection records, repairs and replaced components.
Keep undocumented details marked “unconfirmed” in the quote comparison. Ask the seller to identify each carrier individually, especially when a lot contains mixed labels or revisions.
What SEMI E47.1 does—and what evidence to request
SEMI E47.1 is the mechanical specification for FOUPs used to transport and store 300 mm wafers.
Ask for the applicable standard revision and the documentation supporting the seller's compliance statement. Separately request cleaning and contamination-test records for the offered carriers. Do not treat a generic “certified” label as your acceptance decision.
Acceptance checklist for a used FOUP lot
Use a written acceptance plan approved by your wafer-handling and contamination-control teams.
- Reconcile the lot. Match received labels, quantities and included components to the agreed manifest.
- Inspect condition. Record cracks, chips, worn contact surfaces, residue and door damage. Agree on rejection criteria with your process owner rather than using an arbitrary crack-size allowance.
- Review cleaning evidence. Require the cleaning method, date, packaging method and test results specified in your purchase requirements.
- Demonstrate handling. Arrange a controlled fit and door-operation test on the intended interface using your site's approved procedure and test material.
- Document disposition. Record pass, rework or reject for each carrier; resolve exceptions before production release.
Agree in writing who pays for retesting, rejected units and return freight. Ask for acceptance rights before placing the order.
Compare quotes without assuming a market price
Request separate amounts for the carrier lot, cleaning, inspection, packaging and freight. Compare offers against the same requirement sheet. Obtain written availability and dispatch terms for the exact lot.
Related carrier and handling pages
Use these pages to prepare your sourcing request; confirm fit separately:
RFQ checklist: send the approved carrier part number and revision, required quantity, load-port details, cleaning requirements and acceptance plan.
Related Parts
Caladan stocks used and refurbished parts referenced in this article — tested, inspected, and ready to ship.