completely the vessel is stewed for a while beneficially for 0 5 hours to 2 hours in step 4 the pre polymer is composited and transformed into a polymer material and thus cnts in the cnt film are bounded tightly within the polymer material and then a cnt polymer composite is formed the thickness of the cnt polymer composite is larger than that of the cnt film thus the cnt polymer composite includes two layers i e the cnt film and the polymer material together form a cnt polymer layer and the polymer material higher above than the cnt film i e the now cnt polymer layer forms a polymer material layer essentially a controlled excess amount of polymer material is applied and as such the excess amount free of any cnts constitutes i e co forms a given polymer layer 14 the compositing step can be performed as follows firstly heating the pre polymer solution together with the cnt film at 50 60 u00b0 c for 1 4 hours then heating the pre polymer solution together with the cnt film at 90 100 u00b0 c for about 2 hours and finally achieving the cnt polymer composite in particular the pre polymer solution that intersperses with the cnt film contributes to the formation of a given cnt polymer layer while the pre polymer layer remaining directly upon above the cnt film is cured to co form a given adjacent polymer layer as shown in fig2 the thickness of the cnt polymer layer 12 is about 10 u03bcm referring to fig3 through 5 the current voltage of the cnt polymer composite 10 along the lateral direction is.