Glass Mastering

  • Using a Laser Beam Recorder (LBR) a spiral track is exposed onto the surface of a glass substrate coated with a light sensitive photo-resist substance.

  • This track contains the digital data that forms your CD-ROM or CD-Audio

  • The exposed glass master is then chemically developed to form the required "pit" structure

  • The developed glass master is then metalized by sputtering the photo-resist surface under very high vacuum with a thin layer of nickel.
  • This layer then makes the surface conductive to electricity

  • The nickel coated glass master is now placed in a nickel sulphamate plating solution where the sputtered layer is built up by electroplating to the required thickness for a stamper.

  • This stamper is then peeled from the surface of the glass.

  • It is then cleaned, back polished and punched to form a stamper.