A stuffing or filler for use with pillows, cushions, comforters, duvets and textiles. The backbone may abut or interconnect with said deflectable piece at the distal end of the deflectable piece. The differential input stage includes a differential pair of two NMOS transistors, an NMOS transistor, and a current mirror circuit formed by PMOS transistors. The substrate and the diffusion zone are heated at a temperature and for a time sufficient to diffuse andor dissolve at least a portion of the at least one feature in the exposed surface and in a portion of the diffusion zone beneath the exposed surface to a level below the detrimental amount.