A heat-sensitive composition can be used to make a heat-sensitive imaging material. These synthetic enzyme substrates consist of a substrate peptide that has had its specificity further improved by additional synthetic moieties, selected by combinatorial chemistry techniques, that act to sterically block non-target enzymes. TAPs serve as serial communication ports for accessing a variety of embedded circuitry within ICs and cores including; IEEE 1149. The metering and cooling holes have a curvature toward the pressure side edge of the tip floor to increase a heat transfer rate form the metal.