Patent ID: 9565777
Date: 2017-02-07
CPC Classifications: B05D,B41N,C23C,C25D,H01L,H05K

Claim:
1. A method of making a security mesh comprising: indenting an aluminum film having a first surface and an opposite second surface to form a pattern of indentations in the first surface, depositing the aluminum film on a conductive substrate with the first surface of the aluminum film exposed and the second surface facing the substrate, and anodizing the resulting indented aluminum film to convert the aluminum film to an alumina film having a first surface and an opposite second surface and to form from the indentations through-holes extending through the resulting alumina film; depositing a conductive metal onto the first surface of the alumina film to form a plurality of through-wires in the through-holes and a first metal film on the first surface of the alumina film, the through-wires having respective first ends at or adjacent to the first surface of the alumina film and respective second ends at or adjacent to the second surface of the alumina film, applying a first photoresist layer to the first metal film and removing a patterned portion of the first photoresist layer to expose portions of the first metal film, etching the exposed portions of the first metal film to form on the first surface of the alumina film a plurality of first metal surface wires, connecting the first ends of selected through-wires to each other to thereby form a partially wired alumina film, and then stripping the first photoresist layer from the first metal film; releasing the partially wired alumina film from the conductive substrate to expose the second surface of the alumina film and then applying a second metal film to the second surface of the alumina film; applying a second photoresist layer to the second metal film and removing a patterned portion of the second photoresist layer to expose portions of the second metal film; and etching the exposed portions of the second metal film to form on the second surface of the alumina film a plurality of second metal surface wires, connecting the second ends of selected through-wires to each other, the first and second surface wires being connected to the through-wires so as to form a continuous undulating wire circuit through the alumina film; and then stripping the second photoresist layer from the second metal film.