ISO 14644-17-2021 PDF

Full title and description

Cleanrooms and associated controlled environments — Part 17: Particle deposition rate applications. Guidance on interpreting and applying measurements of particle deposition rate (PDR) on vulnerable surfaces within cleanrooms to support contamination‑control programmes and to reduce the risk of particle contamination of sensitive surfaces.

Abstract

This standard explains how to use measured particle deposition rate results to determine limits for macroparticles on vulnerable surfaces, provides a risk‑assessment method for acceptable deposition risk, and describes methods to influence and reduce particle deposition. It also presents the particle obscuration rate (POR) as an alternative metric. The document does not provide a classification method by deposition rate, does not directly treat deposition of microbe‑carrying particles (although these can be considered particles), and excludes surface deposition by contact.

General information

• Status: Published (International Standard; under systematic review stage).
• Publication date: February 2021 (published 12 February 2021 in multiple catalogues).
• Publisher: International Organization for Standardization (ISO), ISO/TC 209.
• ICS / categories: 13.040.35 (Cleanrooms and associated controlled environments).
• Edition / version: Edition 1 (2021).
• Number of pages: 26 pages in the ISO publication (national/adopted versions sometimes show different pagination, e.g., 36 pages for some EN/BS editions).

Scope

Provides guidance on the interpretation and application of particle deposition rate (PDR) measurements on one or more vulnerable surfaces in a cleanroom as part of a contamination control programme. It shows how to use PDR (and the related particle obscuration rate) to set limits for macroparticle deposition, offers a risk assessment method for acceptable deposition, and describes mitigation techniques when limits/targets are not met. It does not define a classification scheme by PDR nor address contact transfer mechanisms; microbe‑bearing particles may be treated as particles but microbiological aspects are not the primary focus.

Key topics and requirements

• Definition and application of Particle Deposition Rate (PDR) and Particle Obscuration Rate (POR) metrics for vulnerable surfaces.
• Guidance on measurement interpretation and how PDR results inform surface contamination limits.
• Risk‑assessment approach to determine acceptable deposition risk and to set action/acceptance criteria.
• Recommended interventions and control measures to reduce particle deposition (environmental and procedural controls).
• Clarification of scope exclusions: no PDR‑based classification of cleanrooms; contact deposition excluded; microbiological deposition treated only as particles, not as microbiological methodology.
• Practical focus on macroparticles relevant to product/process risk (industry guidance commonly highlights particles ≳5 µm as especially relevant to surface deposition).

Typical use and users

Used by contamination‑control engineers, cleanroom qualification/validation teams, quality assurance, manufacturing leads and process engineers in industries with sensitive surface contamination risks — notably pharmaceutical and biotech aseptic processing, medical device manufacturing, microelectronics and other precision manufacturing sectors. Typical applications include vulnerability assessments of product/process surfaces, development of monitoring programmes, setting surface deposition limits, and selecting mitigation actions when targets are not met.

Related standards

Part of the ISO 14644 series of cleanroom standards; commonly used together with ISO 14644‑1 (air cleanliness classification), ISO 14644‑2 (monitoring to provide evidence of performance), ISO 14644‑3 (test methods), ISO 14644‑8/9/10 (surface and chemical cleanliness assessment), and other ISO 14644 parts covering design, operations and equipment suitability. Many national/adopted versions exist (EN, BS, DIN, UNI, etc.) for local implementation.

Keywords

Particle deposition rate; PDR; particle obscuration rate; POR; cleanrooms; contamination control; surface contamination; vulnerable surfaces; monitoring; ISO 14644‑17; ISO/TC 209.

FAQ

Q: What is this standard?

A: ISO 14644‑17:2021 is Part 17 of the ISO 14644 series, titled "Particle deposition rate applications", giving guidance on using particle deposition measurements to manage contamination risk to vulnerable surfaces in cleanrooms.

Q: What does it cover?

A: It covers interpretation of particle deposition rate (PDR) and particle obscuration rate (POR) measurements, how to set limits for macroparticle deposition on vulnerable surfaces, a risk‑assessment method for acceptable deposition, and methods to influence or reduce deposition. It does not create a PDR‑based cleanroom classification and excludes contact deposition mechanisms.

Q: Who typically uses it?

A: Cleanroom/contamination control engineers, validation and quality teams, manufacturers in pharma/biotech/medical devices and microelectronics, and consultants responsible for monitoring strategies and surface risk assessments.

Q: Is it current or superseded?

A: ISO 14644‑17:2021 is the first edition published in 2021 and is listed as published and under systematic review; it is current as the ISO publication for this topic. National/adopted versions (EN, BS, DIN, UNI, etc.) mirror the ISO content for regional use.

Q: Is it part of a series?

A: Yes — it is Part 17 of the ISO 14644 series ("Cleanrooms and associated controlled environments"). The series includes Parts addressing classification, monitoring, test methods, surface assessment, separative devices, operations, and other topics relevant to controlled environments.

Q: What are the key keywords?

A: Particle deposition rate (PDR), particle obscuration rate (POR), vulnerable surfaces, cleanrooms, contamination control, monitoring, surface deposition, ISO 14644.