An process of forming a chiral conducting polymer, e. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames near the one or more missing frames. The substrate may be machined when the substrate is cut into strips or a flow path surface recess is formed to produce the magnetic readwrite head. A first p-type nitride semiconductor layer is formed on the active layer. The data with the highest priority level in the lower volume group are copied beforehand to the temporary volume in the upper volume group at a time when the data are not being accessed by the host. The method and system involves providing a material, such as a semiconductor wafer, using a non-vibrating contact potential difference sensor to scan the wafer, generate contact potential difference data and processing that data to identify a pattern characteristic of the defect or contamination.