PROCESS FOR MANUFACTURING A PLURALITY OF EC MIRROR CELLS USING GLASS SHEET FOR MULTIPLE FRONT SUBSTRATES

A method of manufacturing a variable reflectance mirror reflective element suitable for use in a vehicular rearview mirror assembly includes providing a front glass sheet and a plurality of rear glass substrates, and joining and spacing the rear glass substrates at the front glass sheet via perimeter seals. After the rear glass substrates are joined with the front glass sheet, the front glass sheet is cut to form a plurality of front glass substrates. A back plate is attached at the rear side of each of the rear glass substrates. After cutting the front glass sheet, the back plate of the respective rear glass substrate and cut front glass substrate portion is fixtured at a finishing tool, which processes the cut edges of at least the respective front glass substrate to provide a finished perimeter edge of the front glass substrate to form a variable reflectance mirror reflective element.