Patent ID: 7001709

Claim:
A method of drawing a pattern on a base material by scanning an electron beam emitted from an electron beam generator, said method comprising: drawing a first part of the pattern on a first pattern-drawn field on the base material by scanning the electron beam on the first pattern-drawn field; shifting the electron beam generator and the base material with respect to each other to position the electron beam generator and the base material for scanning the electron beam on a second pattern-drawn field adjacent to the first pattern-drawn field; and drawing a second part of the pattern on the second pattern-drawn field by scanning the electron beam on the second pattern-drawn field; wherein the first part of the pattern and the second part of the pattern each include a plurality of ring-shaped zones each of which is formed by a slope portion and a side wall portion; and wherein the electron beam generator and the base material are shifted with respect to each other such that a boundary between the first pattern-drawn field and the second pattern-drawn field is positioned at a joint portion connecting one of said slope portions and one of said side wall portions.