A method of manufacturing a glass substrate for a display including the steps of:preparing a glass raw material blended so as to adjust as, on the basis of mass percentage, SiO2 40-70%, Al2O3 2-25%, B2O3 0-20%, MgO 0-3. A front cover retaining pocket is attached to the front cover’s inner surface, and a rear cover retaining member is attached to the rear cover’s inner surface. More preferably, a chelating moiety or targetable construct may be conjugated to a targeting molecule, such as an antibody or antibody fragment, using a click chemistry reaction involving cyclooctyne, nitrone or azide reactive moieties. In one design, this directional beam transmits the pilot and signalling information along with the data traffic information by rotating the beam within the coverage area.