Patent ID: 7547625
Filing Date: 2009-06-16
Classification: B81C,H01L

Abstract:
1. A method of bonding two elements comprising: producing on a first element a first micropattern, comprising a first metal layer; producing on a second element a second micropattern, comprising a second metal layer; applying on the first micropattern and/or on the second micropattern a layer of solder material; producing on at least one of the elements a patterned non-conductive adhesive layer around the micropattern on the element; joining the first micropattern and the second micropattern by a thermocompression or reflow process; wherein the producing of an adhesive layer is performed before the joining such that the first and second elements are secured to each other by the adhesive layer after joining, wherein the first and second micropatterns are formed from cobalt (Co), and wherein the solder layer comprises a tin (Sn) layer, wherein the sum of the thicknesses of the first and second micropatterns is at least equal to a value d, determined as wherein x represents the thickness of the solder layer or sum of the thicknesses of the solder layers, ρrepresents the density of the material and: and wherein at% is derived from the stoechiometric composition of the final intermetallic compound, and m is the atomic mass.