Fine-particle dispersion liquid manufacturing method and fine-particle dispersion liquid manufacturing apparatus

A microparticle dispersion liquid manufacturing apparatus comprising:

• a container, in an interior of which a solid object is contained and a solvent is injected to attain a state where the solvent is present above the solid object and the solid object is in contact with the solvent;
• and
• a light source repeatedly irradiating the solvent with pulsed light from a top of the solvent side so that most of the energy of the pulsed light is absorbed by the solvent selectively among the solid object and the solvent inside the container;
• and
• wherein the solvent is repeatedly irradiated with the pulsed light from the light source to cause expansion and contraction of the solvent to occur repeatedly at the irradiated portion, thereby generating a pressure wave in the solvent, and the pressure wave is made to act on the solid object fixed on an inner wall to finely pulverize the solid object and thereby manufacture a microparticle dispersion liquid in which microparticles are dispersed in the solvent, and
• wherein a poorly-soluble medicament and a dispersion stabilizer are dissolved in a volatile organic solvent in the interior of the container, the solid object obtained by elimination by evaporation of the organic solvent contained in the solution is fixed on the inner wall of the container, and the solvent is injected into the interior of the container.