Micron-scale displacement measurement devices having enhanced performance characteristics are disclosed. The method includes providing first and second substrates and then coupling the first and second substrates together. The hollowed end portion has a generally cylindrical recess having a diameter less than the diameter of the shank. Accordingly an alloy catalyst with superior dispersity can be prepared by increasing the degree of alloying of the catalyst through heat treatment while preventing the increase of catalyst particle size through carbonization of the conductive polymer. Some embodiments also provide for enhanced management of favorite channels. Reference information pointing to slots of a higher hierarchy, a lower hierarchy and the same hierarchy is set, and a flag is set to delete or register extract information without varying the reference information.