The present invention relates generally to a shape memory andor super-elastic material, such as a nickel titanium alloy. JTAG facilities already provided on the chip are used to generate control signals that drive the multiplexers. The gate structure is disposed on the substrate, while the coding implantation region is located in the substrate under the side of the gate structure. A passivation layer is formed overlying the first dielectric layer and has an opening, in which the opening corresponds to the bonding region and the sensing region and exposes the dielectric island and a part of the first conductive layer. In one embodiment, the fluid dynamic bearing includes a liquid metal that is conductive and of low electrical resistance that provides the conductive path between the spindle and the spindle housing.