Manufacturing method for three-dimensional structure and manufacturing apparatus therefor

A method for manufacturing a three-dimensional structure, the method comprising:

• a layer forming step of supplying a flowable composition containing a powder and an organic material to form a unit layer;
• an organic material removing step of performing a treatment to remove the organic material from the flowable composition forming the unit layer, the organic material removing step comprising using a first set of heating source(s) positioned above the unit layer to heat the unit layer to a first temperature that is above the boiling temperature of the organic material, but below the sintering or melting temperature of the powder, such that the organic material is evaporated, but the powder is not sintered by the organic material removing step;
• and
• an energy applying step of applying energy to the powder in unit layer after the organic material removing step to form a molten layer or sintered layer, the energy applying step comprising using a second set of heating source(s) that is positioned above the unit layer and different from the first set of heating source(s) to heat the unit layer to a second temperature that is above the sintering or melting temperature of the powder,
• wherein the layer forming step, the organic material removing step, and the energy applying step are repeated with respect to the molten layer or sintered layer in a stacking direction as appropriate, and
• wherein the layer forming step and the energy applying step are performed in a first enclosed chamber, and the organic material removing step is performed in a second enclosed chamber that is different from the first enclosed chamber.