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US 6,642,475 B2Granted
Etched article and method of etching
OwnerDavid Benderlyinventor
Life of this patent
Estimating the term…
Abstract
A substrate is marked by applying a high melting point material over a lower surface of the substrate, and then heating the material layer. Indicia are formed by directing a source of radiant energy through the substrate for impingement on the material layer, and by moving the source and/or the substrate relative to each other.
Claims16
A radiant energy marking system for marking a light-transmissive substrate, comprising:
- a) a fusible coating applied over a lower surface of the substrate and having a melting point exceeding that of the substrate, and
- b) a radiant energy source for directing radiant energy at an upper surface of the substrate, and through the substrate, in a pattern corresponding to indicia to be marked on the substrate, and for heating the coating to fuse the coating to the substrate to mark the indicia pattern on the lower surface of the substrate.
A method of marking a light-transmissive substrate, comprising the steps of:
- a) applying a fusible coating on and over a lower surface of the substrate;
- and
- b) exposing the coating to radiant energy by directing the radiant energy at an upper surface of the substrate, and through the substrate, in a pattern corresponding to indicia to be marked on the substrate, and heating the coating to fuse the coating to the substrate to mark the indicia pattern on the lower surface of the substrate.
Dependencies are inferred from the claim text.