The invention relates to low-alkali or alkali-free alkaline-earth aluminoborosilicate glasses of the following composition SiO2>49-65; B2O3 0. The first conductive layer includes a first portion penetrating through the semiconductor substrate to connect to the metal pad, and a second portion forming a metal shield on a backside of the semiconductor substrate. According to some embodiments, a method for processing a fullerene starting material comprises large fullerenes comprises mixing the starting material with a first concentrated sulfuric acid solution so as to obtain a first dispersion comprising a first portion of the large fullerenes solubilized in the first concentrated sulfuric acid solution. The rings having inside diameters, which vary to fit the size of pipe used by the outside drop such that are size collar works with any size outside drop pipe. The reflected beam energy forms a point image at the infinity image plane that is used to determine andor adjust the angular orientation of the LDUT.