Cleanroom cleaning per ISO 14644 — fundamentals for semiconductor fabs
What ISO 14644 means for daily cleaning in semiconductor cleanrooms, which classes are relevant and how the cleaning strategy follows.
Cleanroom cleaning per DIN EN ISO 14644 is not janitorial work. It is a qualified process with defined procedures, calibrated tools and complete documentation. In semiconductor manufacturing, particle control decides yield — every fibre, every aerosol droplet can cost millions.
ISO 14644-1 classifies cleanrooms by allowed particle concentration per cubic meter. ISO 3 to ISO 5 are most relevant for semiconductor fabs. Litho areas typically run in ISO 3–4, wet-bench zones in ISO 5, metrology in ISO 5–6.
For cleaning that means: the target class defines materials, procedures and frequency. Wipes, mops, agents and tools must be low in particles and ions. Cleaning motions go from clean-air side to return-air side, overlapping, without repeating on the same surface.
VDI 2083 Sheet 5 complements the ISO norm with concrete cleaning-practice guidance in Germany. We always work by both — ISO 14644 as the target frame, VDI 2083 as the operational manual.
Documentation is mandatory: cleaning plan, executed cycles, particle counts before and after, release. Without documentation no requalification — and without requalification no production.