Patent ID: 7910403

Claim:
A flip chip mounting process wherein a semiconductor chip and a circuit substrate are electrically interconnected, said process comprising the steps of: (i) preparing a semiconductor chip on which a first plurality of electrodes are formed and a circuit substrate on which a second plurality of electrodes are formed; (ii) supplying a composition onto a surface of said circuit substrate, such surface being provided with said second plurality of electrodes, wherein the composition comprises a first component, a second component, metal particles and a convection additive, wherein said metal particles are dispersed in said second component, and said convection additive is contained in said second component, wherein said first component is contained in an interior of at least one of said metal particles, and said metal articles melt upon heating so that said first component comes in contact with said second component to form a thermoset resin, and said convection additive is capable of generating a gas upon heating; (iii) bringing said semiconductor chip into contact with a surface of said composition such that said first plurality of electrodes of said semiconductor chip are opposed to said second plurality of electrodes of said circuit substrate; and (iv) heating said circuit substrate, and thereby electrical connections comprised of a metal component constituting said metal particles are formed between said first plurality of electrodes and said second plurality of electrodes, and also a thermoset resin layer is formed between said semiconductor chip and said circuit substrate, wherein, during the heating step (iv), a gas is generated due to boiling or decomposition of said convection additive, and then movement of said gas causes a convection within said composition, which leads to promotion of a self-assembly of said metal particles and/or said molten metal component toward said first and second plurality of electrodes.