| http://www.w3.org/ns/prov#value | - In the embodiment of FIG. 25, each layer 1370, 1380 of solid thermally conductive material may be soft aluminum, indium, copper or nickel or an elastomer impregnated with powders or particles of such metals or it may be an elastomer impregnated with powder or particles of a thermally conductive electrically insulating material such as boron nitride, high resistivity (e.g., bulk) silicon carbide or
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