Patent ID: 6969635
Filing Date: 2005-11-29
Classification: B81B,B81C,B82Y,G02B,H01L

Abstract:
1. A method for forming a MEMS device, comprising: providing a first wafer; providing a second wafer; providing a sacrificial layer on or in the first or second wafer; forming a plurality of MEMS elements on the sacrificial layer; releasing the plurality of MEMS devices by etching away the sacrificial layer; mixing one or more spacer elements into an adhesive or providing one or more spacer elements separately from the adhesive for separating the wafers during and after bonding; applying the adhesive to one or both of the first and second wafers; bonding the first and second wafers together into a wafer assembly with the spacer elements therebetween so that the first and second wafers are held together in a spaced apart relationship as a wafer assembly; singulating the wafer assembly into individual dies; and applying a getter to one or both wafers before bonding the two wafers together into the wafer assembly.