Method for manufacturing a micro drill and a micro drill manufactured by the same

Micro-drill manufacturing technology using 3D printed layered mold transfer

This technology is a manufacturing method for micro-drills, and the resulting micro-drill, which uses a 3D-printed layered mold to form the drill's shape and surface pattern, with an embedded magnet that allows it to be driven by an external magnetic field.

Existing MEMS processes involve high manufacturing costs, complex processing times, and difficulty in modifying designs, while also facing technical limitations in implementing sharp blades on the micro-drill surface.

This technology proposes a simple process that transfers the layered patterns of 3D printing to the inside of the mold to form micro-patterns on the drill surface, followed by dissolving or softening the mold for removal. It can be applied to the production of micro-robots for thrombus removal and medical instruments for internal procedures, significantly reducing manufacturing costs and time while ensuring design flexibility.

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Key Features:

• A step of creating a mold by layering filaments output from a 3D printer and filling it with liquid polymer
• A step of inserting a magnet into the polymer-filled mold and curing the polymer
• A step of separating the cured polymer from the mold to form the drill tip and drill body
• A configuration where patterns corresponding to the layered filament texture are formed on the surface of the drill tip and drill body

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This invention was developed with support from the Ministry of Science and ICT for the development of 3D printing-based, biosignal-responsive, customized implant devices for smooth urination in patients with lower urinary tract symptoms.