Study of perforation of a thin-film recording medium by sharply focused GaAlAs/GaAs laser radiation

A study was made of a method for storing data by perforation of a thin film (Te or Ag on a Plexiglas substrate) by injection-laser radiation of wavelengths in the range 830–880 nm. Submicron (of area 0.5μ² or more) holes were formed, so that the recorded data density corresponded to the level in audio disks.