Patent ID: 7462294

Claim:
A thermal conducting filler mixture having a high thermal conductivity useful for making thermal conductive products comprising: a first thermal conductor material having a particle size range of about 5 to 20 microns in an amount of about 53 to 58 volume %; a second thermal conductor material having a particle size range of about 0.5 to 10 microns in an amount of about 18 to 23 volume %; and a third thermal conductor material having a particle size range of about 0.05 to 2 micron in an amount of about 21 to 26 volume %; wherein the first thermal conductor material, second thermal conductor material and third thermal conductor materials are present in the mixture in particle volume ratios of: first conductor material to second conductor material of about 1.2:1 to 5.1; first conductor material to third conductor material of about 1:1 to 3.2:1; and second conductor material to third conductor material of about 1:4 to 1.2:1, wherein said thermal conducting filler mixture together with an organic mix of antioxidant, dispersant, and liquid carrier forms a thermal paste comprising about 90-96 weight % of said thermal conducting filler mixture and about 4-10 weight % of said organic mix, said thermal paste having a thermal conductivity above about 6 W/mK with a viscosity at 110° C. of about 80 to 280 Pa-sec.