Patent ID: 7960019
Filing Date: 2011-06-14
Classification: C08K,H01L,Y10T

Abstract:
1. An electronic assembly comprising: a microelectronic die; a heat spreader; a heat sink; and first and second thermal interface materials, the first thermal interface material being between the microelectronic die and the heat spreader and the second thermal interface material being between the heat spreader and the heat sink, the first and second thermal interface materials comprising a first and second phase change polymer, respectively, each phase change polymer selected from the group consisting of a polyolefin, an epoxy, a polyester and an acrylic, and the first phase change polymer different from the second phase change polymer, a solder material, said solder material different than said phase change polymer, and a plurality of thermally conductive non-fusible particles, the solder material interconnecting the non-fusible particles to form a plurality of columnar structures within each of the first and second phase change polymers.