Patent ID: 7842554

Claim:
A process for providing cooling means on the surface of a semiconducting device having a die comprising: (a) defining by thermal analysis, at least one hot-spot area lying in a plane on said die; (b) defining by thermal analysis, at least one other area on said die having a temperature lower than said hot-spot area; (c) fabricating a mask corresponding to said hot-spot area; (d) selectively applying to the surface of said die by means of said mask, a catalyst to define a catalyst area corresponding to said hot-spot area and thereby produce a semiconductive device having a die with a selectively catalyzed surface; said catalyst selected to promote the growth of a plurality of heat conducting nanotube means; (e) growing said nanotube means from a first heat conducting material and on said selectively catalyzed area to extend in a different plane than the plane of said hot-spot area and outwardly form the plane of said hot-spot area, said nanotube means being operatively associated with said hot-spot area to decrease any temperature gradient between said hot-spot area and said area on said device having a temperature lower than said hot-spot area; (f) depositing a second heat conducting material on the surface of said die to form a matrix to surround said nanotube means, said second heat conducting material extending to and operatively associated with said other area on said die having a temperature lower than said hot-spot area to conduct heat away from said other area, said nanotube means made from said first heat conducting material having a higher heat conductivity than said matrix made from second heat conducting material; (g) sufficiently removing any of said second heat conducting material that extends above the distal ends of said nanotube means to make said distal ends available for direct contact with a medium comprising a heat exchange medium.