Patent ID: 7332411

Claim:
A method for wafer bonding using localized induction heating, comprising: forming one or more induction micro-heaters with a first substrate to be bonded wherein forming one or more induction micro-heaters comprises forming a plurality of induction micro-heaters having at least two different geometric shapes, wherein generating a first alternating magnetic field comprises generating the first alternating magnetic field with a first frequency corresponding to a first one of the geometric shapes, and further comprising generating at least one second alternating magnetic field with at least one second frequency to induce current within induction micro-heaters having another one of the geometric shapes, to form an additional bond between the first substrate and the second substrate; positioning a second substrate in intimate contact with the induction micro-heaters; and generating a first alternating magnetic field to induce current in the induction micro-heaters, to form one or more bonds between the first substrate and the second substrate.