Fabrication of micrometer-size solid immersion lens: Composition dependence of wettability of substrate by glass melt

摘要

Fine glass particles Na2O-CaO-B2O3-SiO2 are heated on glassy-carbon substrate to obtain micrometer-size solid immersion lenses (mu-SILs), and the composition dependence of the wetting property between glass melt and glassy-carbon substrate is investigated. The obtained glass particles have the super-spherical shapes with smooth surfaces. The contact angles of the particles are ranging from 125 degrees to 147 degrees depending on the glass composition, and there are the compositions at which the shape of the glass satisfies the optical condition of mu-SIL, showing the correlation between the contact angle and the internal structure of the glass. These results revealed that the super-spherical shape of mu-SIL can be controlled by the glass composition through the wetting property. (C) 2007 Elsevier B.V. All rights reserved.