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Over the past few months, I’ve covered the common sampling techniques used in technical cleanliness inspections. So far, I’ve taken a closer look at the washing method, direct liquid filtration, and tape lift sampling. Now I’ll discuss the particle trap method.
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What is the particle trap method?
The particle trap method is widely used to monitor the environmental cleanliness of the assembly and logistics processes in production and clean rooms. This practice involves laying out a particle trap, which consists of an adhesive pad about the size of a filter membrane, in places with potential particulate contamination for a defined amount of time to collect air particle sedimentation. The time the particle trap is active is known as the sedimentation time.
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