Manufacturing method of plate precursor having needle-like protrusion, and manufacturing method of microneedle array

A manufacturing method of a plate precursor having a needle-like protrusion, the method comprising:

• a preparation step of preparing a cutting tool comprising at least one blade conforming to an external shape of the needle-like protrusion, and a base material;
• and
• a cutting step of cutting the base material by rotating the cutting tool about a tool axis of the cutting tool and revolving the cutting tool around an axis of the needle-like protrusion to be formed on the base material to form the needle-like protrusion having a shape conforming to a shape of the cutting tool,
• wherein the cutting tool rotates about the tool axis at a position where a first distance is formed between the tool axis and the axis of the needle-like protrusion, the cutting tool revolves around the axis of the needle-like protrusion with the first distance as a first revolution radius, the at least one blade of the cutting tool cuts the base material to a predetermined depth,
• the cutting tool is moved in a direction away from the axis of the needle-like protrusion and the cutting tool rotates about the tool axis at a position where a second distance is formed between the tool axis and the axis of the needle-like protrusion, the cutting tool revolves around the axis of the needle-like protrusion with the second distance as a second revolution radius to cut the base material.