Investigation: the investigation was carried out using a keyence vhx-5000 digital microscope.Small holes can be found.Batch history review: the device quality and manufacturing history records have been checked for the available lot number.The device history files has been checked and found to be according to our specification valid at the time of production.No similar incidents have been filed with products from this batch.Conclusion and root cause: based on the information available as well as a result of our investigation, the root cause of the failure is most probably related to an improper storage or transport of the product.Rational: according to the device history report, the product has been distributed in a condition complying with our specification.Most likely the product was damaged by an improper transport or storage.It is not clear when this damage occurred exactly.No capa is necessary.
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