Patent ID: 9463528
Filing Date: 2016-10-11
CPC Classification: B23K,Y10T

Claim Text:
1. A method for marking an article including a substrate and a layer supported by the substrate, wherein the layer has an inner surface and an outer surface, and wherein the outer surface has a farther distance to the substrate and the inner surface has a closer distance to the substrate, the method comprising: generating a beam of laser output having a beam waist; directing a focal point of the laser output between the inner surface and outer surface of the layer with an energy density at the focal point sufficient to form a plurality of structures within a region of the article, within the layer, and spaced apart from an article outer surface of the article, wherein the layer has a thickness between the inner surface and the outer surface that is less than or equal to 100 microns, and wherein the plurality of structures are configured to scatter light incident upon the outer surface of the layer.