aw99Download scientific diagram | Typical 1st bond SEM images of the AW99 wire at 50µm pad pitch. from publication: Development of New Ultra-hh Stiffness Gold Bonding Wire | Driven bySontara® AW 99 are made of a proprietary blend of fibers that are softer than most conventional wipes. Since many scratches are caused by grit and dirt already on the surface of the window,