Patent ID: 6359333
Filing Date: 2002-03-19
Classification: B81B,G01J

Abstract:
A wafer-pair having at least one sealed chamber, comprising:a first wafer having at least one recess; a sealing ring formed from solder for each at least one recess and situated on said first wafer beyond a periphery of said at least one recess; a second wafer, situated on said sealing ring of each at least one recess to form at least one chamber from each recess, said sealing ring having been heated to an elevated temperature to form an hermetic wafer to wafer seal prior to evacuation of said at least one chamber, and having a port within said periphery of each of said sealing rings; and a layer of deposited solder on said second wafer for plugging the port within said periphery of each of said sealing rings to seal the at least one chamber said layer of deposited metal being applied to said second wafer subsequent to said second wafer having been situated on said chamber at a temperature lower than that at which said sealing ring softens and subsequent to evacuation of said chamber.