Abstract: A die package comprises a substrate comprising a first face and an opposing second face, a first semiconductor die coupled to the first face of the substrate, a second semiconductor die coupled to the first face of the substrate; and a heat spreader, wherein the first semiconductor die is thermally connected to the heat spreader by a first thermal interface material and the second semiconductor die is thermally connected to the heat spreader by a second thermal interface material, wherein the first thermal interface material comprises a first composition and the second thermal interface material comprises a second composition, wherein the first composition has a lower elastic modulus than the second composition under a first specified condition or conditions.