Patent ID: 6814239
Filing Date: 2004-11-09
Classification: C23C,G01N

Abstract:
High-purity standard particle production apparatus comprising a particle generation chamber to generate high-purity particles by laser ablation in an ambient gas,a particle classification chamber to classify high-purity standard particles of a diameter as required from said high-purity particles as generated at said particle generation chamber, a particle collecting chamber to collect said high-purity standard particles as classified at said classification chamber; and a particle heating means positioned between said particle classification chamber and said particle collecting chamber; wherein said particle heating means is adapted to heat the high-purity standard particles classified at said particle classification chamber by infrared radiation at a downstream position from said particle classification chamber, so that high-purity standard particles of a comparatively large diameter which are non-spherical and are composed of a cohesive mass of particles having a smaller diameter than the cohesive mass is reshaped into high-purity standard particles, and whereby the crystallization of the high-purity standard particles is improved.