US Patent 10232157 Hollow microneedle with beveled tip

An article having at least one microneedle (160, 260) is provided. The microneedle includes a base (162), an elongated body (161) having a central axis (130) and a body diameter (168), a tip portion (166), and a hollow channel (170). The a tip portion includes a tip (164), a first bevel face (140) oriented diagonally with respect to the central axis and extending through at least 75% of the body diameter, a second bevel face (146) oriented substantially perpendicular to the central axis and intersecting the first bevel face, and a bevel opening defined by a first edge (174) of the first bevel face and a second edge (176) of the second bevel face. The hollow channel extends axially into the body from the bevel opening (172).