• CleanTec Engineering (S) Pte Ltd 201 Woodlands Ave 9 #04-50 Woodlands Spectrum 2 Singapore 738955
    Tel: (65) 62541151 Fax: (65) 62541161 Email: sales@cleantec.com.sg

Cleanroom Technology

Cleanroom technology has evolved over the years. With more stringent requirements governing manufacturing products, we have progressed to using higher efficiency filters to satisfy production requirements.

Airborne particulates range in size from 0.001 microns to several hundred microns. A typical High Efficiency Particulate Air (HEPA) filter is rated to filter out 99.97% of 0.3 microns (or larger) particles. For higher grade filters, there are Ultra-Low Penetration Air (ULPA) filters that have a minimum efficiency 99.999% at 0.1 microns.

The key to creating and maintaining a clean environment is based on the principles of:

  • Isolating the clean environment to prevent ingress of contaminants from the external environment.
  • Diluting the air within the environment with clean air to keep the particle concentration low.
  • Minimizing the generation and accumulation of contaminants within the clean environment itself.

The selection of materials used in a cleanroom varies with the cleanliness class of the environment and the specific requirements of the end-user. The most commonly used standard is ISO 14644, which has replaced the long-standing US Federal Standards209E (FS209E). However, many still find it easier to refer to the cleanliness classes with their FS209E designations. This table shows the current ISO classifications and their equivalent FS209E designations.

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