MICRONEEDLE STRUCTURE AND BIODEGRADABLE MICRONEEDLE THEREOF

A microneedle structure and a biodegradable microneedle thereof are provided. The biodegradable microneedle defining a central axis includes a first step portion and a second step portion that is taperedly extending from the first step portion along the central axis. The biodegradable microneedle ha...

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Hauptverfasser: TSAI, TING-KAI, HSIEH, SHU-PIN
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A microneedle structure and a biodegradable microneedle thereof are provided. The biodegradable microneedle defining a central axis includes a first step portion and a second step portion that is taperedly extending from the first step portion along the central axis. The biodegradable microneedle has a total height along the central axis and a maximum internal diameter along a direction perpendicular to the central axis. The total height is within a range of 380-430 μm, and an aspect ratio defined by the total height divided by the maximum internal diameter is within a range of 1.2-2.2. In a cross section of the biodegradable microneedle having the central axis, a part of the second step portion arranged away from the first step portion having a corner. The corner has an angle within a range of 65-100 degrees and faces toward the first step portion.