Microstructure-based Drug Injection Device and Method for Manufacturing the Same

A method for manufacturing a microstructure-based drug injection device, comprising:

• preparing a forming mold having a shape that corresponds to a microstructure to be manufactured;
• applying a biodegradable material-mixed solution to the forming mold;
• primary drying to form a needle film where the microstructure is formed by drying the biodegradable material-mixed solution applied to the forming mold;
• coating a drug to an outer surface of the microstructure;
• and
• secondary drying for drying the needle film,
• wherein an inner space where a gas is accommodated is formed in a filling space formed by the microstructure in the primary drying.

A microstructure-based drug injection device comprising:

• a needle film where a microstructure is formed;
• a drug filled in at least a part of a filling space formed by the microstructure;
• and
• an inner space that corresponds to a space other than an area where the drug is accommodated in the filling space, while accommodating a gas.

A microstructure-based drug injection device comprising:

• a needle film where a microstructure is formed;
• a drug coated to an outer surface of the microstructure;
• and
• an inner space of which at least a part is disposed in a filling space formed by the microstructure.