Patent ID: 6085967
Filing Date: 2000-07-11
Classification: H01L,Y10S

Abstract:
A method for registrably aligning wafers prior to bonding, comprising the steps of:providing an assembly jig consisting of a substantially planar platform having a plurality of upstanding aligning elements spatially arranged about one face of said platform;providing a first wafer for bonding, said first wafer having a first predetermined pattern formed therein and a predetermined number of first locating features corresponding to said plurality of upstanding aligning elements on said platform, wherein each one of said first locating features has a predetermined spatial relationship with said first predetermined pattern;providing at least a second wafer for bonding to said first wafer, said second wafer having a second predetermined pattern formed therein and a predetermined number of second locating features corresponding to said plurality of upstanding aligning elements on said platform, wherein each one of said second locating features has a predetermined spatial relationship with said second predetermined pattern;registrably aligning each one of said predetermined number of first locating features of said first wafer with a corresponding one of said plurality of upstanding aligning elements on said platform;arranging each one of said predetermined number of locating features of said first wafer about the correspondingly aligned one of said plurality of upstanding aligning elements on said platform;registrably aligning each one of said predetermined number of second locating features of said second wafer with a corresponding one of said plurality of upstanding aligning elements on said platform; andarranging each one of said predetermined number of second locating features of said second wafer about the correspondingly aligned one of said plurality of upstanding aligning elements on said platform such that a face of the first wafer is in intimate contact with a face of the second wafer for bonding.