ISO 14644-4 CLEANROOM RECEIVING & TRANSFER INTERLOCK STANDARD

Fab Clean-Dock Airlock Transfer Audit

Operational protocols for transitioning photolithography scanners and chemical vapor deposition (CVD) tools from transport trailers through airlock vestibules into sub-micron fab bays.

01 Fab Receiving Dock & Tool Parameters

Airlock Particulate Washout & Pressure Telemetry

DOCK TELEMETRY
Purge Dwell Time
120 sec
Full 99.9% cleanout
Pressure Delta
+25.0 Pa
Bay to airlock cascade
Max Point Load
175 psi
Raised floor cap: 250
Cross-Contamination Ingress Defense: 99.98% Particulate Shield
Floor Pedestal Integrity: SAFE — PLATES AUTHORIZED
ESD Grounding Continuity: < 1.0 Ohm Dual Copper Bond
Transfer checklist signatures log directly into Exspeedite Semiconductor Custody module with tamper-evident digital timestamps.

Fab Clean Dock Receiving Mechanics & Pressure Cascade Principles

Pressure Cascade Hierarchy

The core cleanroom operates at +50 Pa relative to atmosphere. The airlock vestibule operates at +25 Pa, and the truck unloading bay at +12.5 Pa, ensuring outward air blast whenever an interlock door unlocks.

Floor Load Spreading Plates

Cleanroom raised access floors cannot bear high point loads from heavy casters. Aerospace rigging teams lay 3/4-inch aircraft-grade aluminum plates to distribute wheel loads evenly across floor pedestals.

Solvent Wipedown Cycle

Before entering the inner airlock, secondary barrier wraps are stripped. The shipping frame undergoes systematic wipedown with 70/30 ultra-pure isopropyl alcohol using low-lint non-woven polyester cleanroom wipes.

Transfer Step Environmental Requirement Verification Check Responsible Personnel
Step 1: Bay Dock Ingestion Positive pressure > +12.5 Pa Magnehelic differential gauge verified Lead Carrier Rigger
Step 2: Outer De-Trashing HEPA filtered air curtain armed Outer tarps & vapor barriers discarded Fab Receiving Technician
Step 3: Airlock Washout 4,500 FPM air shower + 120s dwell Particle count < 1,000 / m³ Cleanroom Quality Engineer
Step 4: Clean Bay Ingestion ISO Class 3 active laminar ceiling Aluminum load spreader plates laid OEM Tool Field Service Engineer

Request Fab Receiving Dock Airlock Audit Checklist

Coordinating multi-million-dollar tool moves into an operational semiconductor wafer fab? Connect with our cleanroom transportation engineers for dock compatibility reviews.