3D SOLID OR HOLLOW SILICON MICRONEEDLE AND MICROKNIFE WITH - SHAPE STRUCTURE

摘要

The present invention discloses a linear-edged 3D solid or hollow microneedle or microknife. A tip edge of the microneedle or microknife is a linear edge parallel to a group of (111) oriented facets of monocrystalline silicon. The linear edge extends along a straight or curved line and has a narrow width. An opening is formed on one or each side adjoining the linear tip edge, or is formed at the middle of the linear tip edge. The opening is communicated with a channel formed from the bottom surface of the microneedle or microknife, so as to form a through hole from the tip to the bottom of the microneedle or microknife. The triangular channel has six side walls of (111) oriented facets. The microneedle or microknife is used for transdermal drug delivery, body fluid withdrawing or the like. Methods for producing a microneedle or microknife are also disclosed.