Fab Tool Qualification Checklist (Free)

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18 critical items still open - these are the highest-risk gaps.

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Facilities and installation

Floor loading, vibration and layout verified against the tool site requirementsCRITICALPower, UPS and grounding connected and measuredCRITICALProcess gases, chemicals and drains connected and leak testedCRITICALExhaust, cooling water and compressed air supply verified at specCleanroom class and pressure cascade confirmed in the install areaSeismic anchoring completed where the site requires itInstallation punch list opened with owners and dates

Safety and compliance

Safety interlocks and emergency stops testedCRITICALGas and chemical sensors alarm tests recordedCRITICALHazard review completed and lockout points labeledCRITICALHazardous materials documentation and safety data sheets on fileOperators and technicians trained on tool specific safety rulesEnvironmental permits and waste handling updated where required

Hardware and software acceptance

Acceptance tests from the supplier agreement run and signed offCRITICALHost communication (for example SECS/GEM) connected and tested with the MESCRITICALRecipe management and access levels configuredSensors, mass flow controllers and temperature probes calibratedCRITICALSoftware versions and configuration baseline recordedParticle and contamination baseline measured on the empty toolCRITICALSpare parts list and critical spares stocked

Process qualification

Process recipe qualified against target specification on monitor wafersCRITICALWithin wafer and wafer to wafer uniformity meet specificationCRITICALRepeatability run completed over multiple days or lotsTool to tool matching study completed where a sister tool existsDefect density measured and compared with the baseline limitCRITICALCapability (Cp, Cpk) calculated for key output parametersControl chart limits set and SPC data feed verifiedCRITICALCustomer or internal change notification issued where required

Production release

Maintenance plan and preventive maintenance frequencies loaded in the maintenance systemCRITICALRequalification procedure defined for after PM and after repairsCRITICALTool added to the MES with correct route and recipe permissionsCRITICALOut of control action plan documented for key chartsEquipment record created in ERP or asset system with serial numbersRelease approved by process, equipment and quality ownersCRITICALFirst production lots designated for extra monitoring

Every critical item must be complete before the tool is released to production. Non-critical gaps should have an owner and due date in the release record.

Equipment records and maintenance in your ERP

Optional: a short chat on connecting tool qualification records to your maintenance and ERP data.

Optional. The tool and every export work without this. No spam.

How to use the checklist

Work through the groups in order and tick items as evidence is attached to the qualification record. The items marked critical should block release if open. Export the finished list to PDF or Excel and file it with the equipment record. Adapt the wording to your own tool type, since an etcher, a furnace, a prober and a wire bonder each add their own checks.

Assign an owner and date to every unchecked item
Attach data, not just a signature
Repeat the process section after major repairs

Staged qualification logic

Qualification follows a simple funnel: confirm the site and utilities, confirm safety, accept the hardware against the supplier agreement, qualify the process on monitor wafers and only then release product. Skipping a stage moves risk downstream, where it costs more. For example, a gas line leak found after process qualification can invalidate the process data.

Worked example

A new furnace passes acceptance but shows a thickness uniformity drift on day three of the repeatability run. Because repeatability is a required item, the tool stays on hold until the temperature controller is re-tuned and the run is repeated. The cost is a few days, instead of scrap on product lots.

Common mistakes

Teams often qualify the process but forget the maintenance and requalification rules, so the tool slowly drifts with no trigger to re-check. Another trap is skipping the host communication test, which delays MES integration. Finally, avoid declaring victory based on supplier factory test data without an on-site baseline.

Frequently Asked Questions

What is the difference between IQ, OQ and PQ?

Installation qualification checks the tool is installed correctly, operational qualification checks it functions across its ranges, and performance qualification checks it produces product that meets specification. This checklist covers all three in plain terms.

When must a tool be requalified?

After preventive maintenance, parts replacement that affects the process, software changes, relocations or any excursion. Define the exact triggers and tests in a requalification procedure.

Is this valid for OSAT equipment such as wire bonders?

The structure applies. Replace the process section with tool specific tests such as bond pull and ball shear checks, and substitute the particle baseline with your area requirements.

Do I need customer approval for a new tool?

It depends on your customer agreements. Automotive, medical and defense customers often require notification or approval, so check your change notification obligations.

Netray can help link qualification, maintenance and lot records in your ERP or MES so requalification triggers are visible, on your own infrastructure.

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