Patent ID: 7985657
Filing Date: 2011-07-26
Classification: H01L

Abstract:
1. A method for bonding substrates, comprising: providing a first substrate, a second substrate, and a third substrate, at least one of the substrates comprising a semiconductor substrate having an integrated circuit; providing a first interlayer between the first and second substrates; providing a second interlayer between the second and third substrates; providing microwave energy so that at least a portion of the microwave energy is absorbed by the first and second interlayers to thereby raise the temperature of the first interlayer faster than the temperatures of the first and second substrates to melt the first interlayer to facilitate bonding of the first and second substrates and raise the temperature of the second interlayer faster than the temperatures of the second and third substrates to melt the second interlayer to facilitate bonding of the second and third substrates; wherein at least one of the first and second interlayers comprises a thin-film metal layer having a heat capacity less than those associated with its respective substrates, and is not attached to its respective substrates prior to the providing of microwave energy.