Patent ID: RE39143

Claim:
A method for making a wafer-pair having deposited layer plugged sealed chambers, comprising: growing a thermal layer on a first side of a first silicon wafer; depositing a nitride layer on the thermal layer; depositing, patterning and removing portions of first metal layer on the nitride layer for a plurality of devices; depositing, patterning and removing portions of a second metal layer on the nitride and first metal layers for the plurality of devices; patterning and removing material from the first silicon wafer and layers on the first side of the first silicon wafer and from a second side of the first silicon wafer to make a plurality of pump-out ports through the first silicon wafer and layers on the first silicon wafer; masking and removing material from a first side of a second silicon wafer to form a plurality of recesses in the first side of the second silicon wafer; forming a sealing ring on the first side of the second silicon wafer around each of the plurality of recesses; and positioning the first side of the first silicon wafer next to the first side of the second silicon wafer; and wherein: each sealing ring is in contact with at least one of the layers on the first side of the first silicon wafer; each recess of the plurality of recesses results in a chamber containing at least one device of the plurality of devices; each sealing ring encloses at least one pump-out port of the plurality of pump-out ports; and the first and second silicon wafers are effectively a bonded together set of wafers.