Patent ID: 8845843
Filing Date: 2014-09-30
Classification: B41M,Y10T

Abstract:
1. A method of making a data carrier medium, said medium being arranged to allow for durably preserving said data and viewing said data through the medium, said method comprising the steps of: providing a data carrier medium comprising a first transparent carrier layer made of sapphire arranged for carrying a graphical inscription on said first carrier layer, the graphical inscription being a miniaturized exact reproduction of said data so that the graphical inscription can be interpreted by the human eye after magnification, performing the graphical inscription by depositing on the first face of the first carrier layer at least one lithographic deposition of metal having an optical opacity, the graphical inscription being performed by partial superposition of metal deposits on the first carrier layer, the graphical inscription further being performed in reverse relative to the direction in which the inscription is read, placing a second transparent carrier layer of data carrier medium made of sapphire in superposition on the first face of the first carrier layer so as to protect the graphical inscription, enclosing said first and second carrier layers in a transparent housing with two opposite transparent sides arranged in such a way that the optical opacity of the graphical inscription is directly interpretable by the human eye after magnification when the first face of the first carrier layer is illuminated through one of said transparent sides of said housing and the second carrier layer and the graphical inscription is viewed through a second face of the first carrier layer and the other transparent side of said housing.