A method for forming a MEMS device is disclosed, where a final release step is
performed just prior to a wafer bonding step to protect the MEMS device from contamination,
physical contact, or other deleterious external events. Without additional changes
to the MEMS structure between release and wafer bonding and singulation, except
for an optional stiction treatment, the MEMS device is best protected and overall
process flow is improved. The method is applicable to the production of any MEMS
device and is particularly beneficial in the making of fragile micromirrors.