Patent ID: 8448874
Filing Date: 2013-05-28
Classification: C23F,H05K

Abstract:
1. A method for manufacturing a radio frequency identification tag component by etching, the component comprising a substrate and an electrically conductive line configuration supported by the substrate, the electrically conductive line configuration corresponding to an antenna of the radio frequency identification tag and being formed by etching away locally by an etchant an electrically conductive coating supported by the substrate, and in which method an etching mask is used to control locally removal and maintenance of the electrically conductive coating by using an etchant, wherein the etching mask comprises barrier material on at least one main area corresponding to the electrically conductive line configuration to be maintained during etching and the etching mask further comprises at least one first sub-area and at least one second sub-area, both the first and second sub-areas having a form of a line and conforming to the shape of an outer edge of the at least one main area of the etching mask and comprising barrier material, the second sub-area surrounding the main area on the opposite side of the main area substantially in the same plane in the direction of the surface of the substrate with respect to the first sub-area such that substantially the whole main area is surrounded by the first and second sub-areas on both sides at a distance from the edges of the main area, and the etchant is applied on the component until areas of electrically conductive coating not protected by the main area of the etching mask and until the areas of the electrically conductive coating protected by the first and second sub-areas of the etching mask has been substantially removed by the etchant.