An optical connector includes a housing including a coupling portion for coupling another optical connector and a blocking component for blocking an optical axis arranged in the coupling portion. The method may include machining away a damaged first portion of the component, and machining away a second portion of the component adjacent the damaged first portion, the second portion being an area that would be subject to distortion resulting from solidification of molten weld material added to repair the damaged first portion. The memory system also calculates, from at least one physical bank number read from the mapping memory banks other than the mapping memory bank selected by the read logical bank number, a write physical bank number indicating which one of the data memory banks is to be written. after the application is completed is 10 seconds or less, thereby drying the coating liquid. The first mask limits a lateral extent of the ion beam, and the nanogap has a width that is less than a width of the opening. The insulated electric wire according to the present invention includes a high adhesion resin layer made of a polyamideimide resin containing a compound having a polar group in a molecular structure of an insulation material; and a high flexibility resin layer provided on the high adhesion resin layer.