The concept of component packaging for cleanliness testing according to VDA 19.1:2015 / ISO 16232:2018 could be described as an ‘onion‑layer’ structure. Ideally, the parts to be tested should be packaged in at least three layers:
- Outer layer (transport packaging):
In general, this layer is usually made of cardboard, although other materials may also be suitable. Identification documents must be placed in such a way that they are not covered by other labels or carrier barcodes. To prevent this, it is recommended to place the identification documents inside the transport packaging.
Additionally, it is recommended to prepare the transport packaging with materials (e.g., bubble wrap) to prevent the samples from moving and colliding with each other, as this may cause particle detachment during transport and distort the test results.
- Intermediate layer:
This layer protects the packaging layer that is in contact with the sample to be analysed and is removed in the laboratory’s material airlock (SAS). Please use, for example, a polypropylene bag (clean, not reused, and sealed) or similar. Avoid using paper, cardboard, self‑cutting closures, or polymer foams.
- Inner layer (packaging in direct contact with the component)
This layer is removed inside the cleanroom. When selecting the packaging that will be in direct contact with the test sample, you must ensure that it does not release particles, is clean, sealed, not reused, and that the component is sufficiently protected against external contamination. Suitable materials include, for example, hermetically sealed polypropylene bags, ESD bags…
As a general principle, test samples must be packaged in such a way that they do not collide or rub against each other during transport. For more information, please refer to the file.
