Patent ID: 7582510

Claim:
A method of improving reliability of a semiconductor device comprising at least one layer of low-K ILD, steps of which comprise: providing a semiconductor device comprising: a semiconductor chip comprising copper electrical interconnections and at least one layer of low-K ILD therewithin and metallization on a surface thereof; and a carrier substrate having electrical contact pads on a surface thereof to which the semiconductor chip is electrically interconnected through an electrically conductive material to the copper electrical interconnections; and optionally, a second semiconductor chip having opposed surfaces, one of which for bonding to the carrier substrate and the other of which for establishing electrical interconnection with both the semiconductor chip and the carrier substrate, wherein the carrier substrate has electrical contact pads on a surface thereof to which at least one of the semiconductor chip or the second semiconductor chip is electrically interconnected; providing a heat curable composition either between the electrically interconnected surfaces of the semiconductor chip and the carrier substrate to form a semiconductor device assembly and/or over the semiconductor device assembly; and exposing the semiconductor device assembly to elevated temperature conditions sufficient to cure the heat curable composition, wherein the heat curable composition comprises a curable resin component and a filler component, wherein the filler component is present in an amount sufficient to provide the heat curable composition when cured with a coefficient of thermal expansion of less than about 25 ppm/° C. or a coefficient of thermal expansion of greater than about 50 ppm/° C. and when cured the heat curable composition has a ratio of modulus versus temperature between −65° C. and 125° C. in the range of 10 MPa/° C. to about −10 MPa/° C.