Patent ID: 6537892
Filing Date: 2003-03-25
Classification: B81C,H01L

Abstract:
A method of bonding first and second semiconductor wafers together so that contact surfaces of the first and second wafers are spaced apart by a stand-off distance, the method comprising the steps of:providing a mixture of a glass frit material and a particulate filler material having a diametrical dimension approximately equal to the stand-off distance; depositing the mixture on the contact surface of the first wafer so as to define a bond line thereon; mating the first and second wafers so that the bond line is between and contacts the contact surfaces of both of the first and second wafers; heating the mixture to melt the glass frit material and not the particulate filler material so that the contact surfaces of the first and second wafers are spaced apart by the stand-off distance established by the diametrical dimension of the particulate filler material; and then cooling the glass frit material to form a glass bond line between the first and second wafers, the contact surfaces of the first and second wafers remaining approximately spaced apart by the stand-off distance.