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water recertification.

Recertification of PSI Calibration Standards

We strongly recommend a periodic recertification of our Standards. The consensual recommended time interval is one calendar year, though individual internal requirements or requirements dictated by ISO 9001 may vary. The original certification date for each Standard appears on the Certificate of Calibration.

We also recommend recertification when the calibrated thickness of the Standard seems to have changed dramatically due to contamination or other factors.

The recertification process consists of a preliminary inspection and measurement. If no physical damage is found in the calibration area (such as pits, scratches, cracks, etc.), the standard will be chemically and mechanically cleaned. Then a complete calibration procedure will be performed. The Standard will be recertified traceable to NIST, and a new Certificate of Calibration will be issued.

Recertification by PSI Inc of non-PSI Standards

In response to high demand from customers, Process Specialties now performs recertification of “outside” or Non-PSI Standards. The only requirement is that the metrology standards be either Thin Film Standards (Silicon Dioxide or Silicon Nitride) or Step Height Standards. In addition the standards must be in a Silicon wafer format and in the 100 mm -300 mm size range. The thickness to be recertified must also be within the range of thickness, that we are accredited to calibrate and certify by NVLAP.

Recertification of Nanometrics NIST Traceable Standard

Trustpro can offer a recertification service of your Nanometrics NIST traceable standard which is recommended to be carried out on an annual basis.

The recertification process consists of a preliminary inspection and measurement. If no physical damage is found in the calibration area (such as pits, scratches, cracks, etc.), the standard will be chemically and mechanically cleaned. Then a complete calibration procedure will be performed. The Standard will be recertified traceable to NIST, and a new Certificate of Calibration will be issued.

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we produce & supply spares for a range of products

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