SHARP END FORMING MEMBER, APPARATUS WHEREIN SUCH SHARP END FORMING MEMBER IS APPLIED AND METHOD FOR FORMING SHARP END FORMING MEMBER

摘要

Provided is a sharpening method by which an end can be sharpened more than an end sharpened by the conventional machining and polishing. A sharpened sharp end forming member and an apparatus wherein such sharp end forming member is applied are also provided. A sharp end region (2) is formed on a conductive member (1) or a conductive film forming member, an insulating film (6) is formed to cover the surface of a sharp end of the sharp end region (2), and a counter electrode (7) is arranged to face the sharp end. An electric field of a magnitude that permits a dark current to flow without generating discharge is applied between the sharp end and the counter electrode (7) to melt the sharp end once, and a pyramid-shaped single-crystallized or recrystallized sharpest end section (8) is grown.