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
also recommend recertification when the calibrated
thickness of the Standard seems to have changed dramatically due
to contamination or other factors.
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 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.
Please check our NVLAP scope here to see if your standard not manufactured by PSI Standards
has a thickness range that qualifies for this service. If you
are not sure if your Non-PSI Standard thin film or step height
standard qualifies, please contact PSI USA or your international
Please contact Process Specialties or one of
our international representatives, to check pricing and arrange for shipment of your Standard(s) back to the
Northern California facility for
recertification. PSI Standards or other Non-PSI Standards may be sent back to Process
Specialties for recertification at any time. The turnaround
time for this recertification process is normally 15 working
days or less, after the
receipt of the Standard(s) by the PSI facility in Northern California.
Standards is ISO/IEC 17025:2005 Accredited by NVLAP, Lab
code number: 200669-0.