Patent ID: 6328841
Filing Date: 2001-12-11
Classification: H01L

Abstract:
A method of connecting a first and a second silicon wafer, comprising the following steps:a1) providing the first silicon wafer with a fully cured polyimide layer on a main surface thereof;b1) causing a plasma-induced reaction to take place between the polyimide layer and water so as to make a surface of the polyimide layer, which is to be connected to the second silicon wafer, hydrophilic;c1) causing a plasma-induced reaction to take place between a main surface of the second silicon wafer, which is to be connected to the polyimide layer, and chlorine so as to make the main surface of the second silicon wafer hydrophilic;d1) treating the main surface of the second silicon wafer, which is to be connected to the polyimide layer, with hydrolyzed triethoxysilylpropanamine so as to produce amino groups on the main surface of the second silicon wafer; ande1) connecting the first and second silicon wafers by joining together the main surface of the second silicon wafer to be connected and the main surface of the polyimide layer to be connected while heat is being supplied for a specific period of time.