Patent ID: 6036872
Filing Date: 2000-03-14
Classification: B29C,B81B,G01J,H01L

Abstract:
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; andpositioning the first side of the first silicon wafer next to the first side of the second silicon wafer; andwherein: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; andthe first and second silicon wafers are effectively a bonded together set of wafers.